Text in drop down list of combo box is not visible

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  - 1
    - DataGridView - readonly cell I have a DataGridView with a bound column that has a read-only property of False. The I can't enter text into the cell. My data adapter is setup for updates. What would prevent the cell from me typing text into the cell that is supposedly editable? Thanks in advance! Mark Tag: Text in drop down list of combo box is not visible Tag: 106033
  - 2
    - Control invoking w/o creating a delegate Hi, I'm building a smart device windows app that performs some background operation and that requires updating a progress bar. Since I need to use the progress bar thread, I call MyProgressBar.Invoke() method where I pass a delegate object. The syntax is quite painfull since I need to create a custom delegate for each modification of any control. I'd like to use the anonymous delegate pattern, but it does not compile : stepProgressBar.Invoke( delegate(int progress) { _stepProgressBar.Value = progress; }, new object[] { e.Progress } ); The error is this error : The best overloaded method match for 'System.Windows.Forms.Control.Invoke(System.Delegate, params object[])' has some invalid arguments Error 10 Argument '1': cannot convert from 'anonymous method' to 'System.Delegate' I'd like to avoid building a custom delegate type like public delegate void UpdateProgressBarDelegate(ProgressBar bar, int progress); Is there any correct syntax to reach my goal ? Thanks, Steve Tag: Text in drop down list of combo box is not visible Tag: 106027
  - 3
    - Minimizing and then Maximizing my application prevents windows from appearing! Hi All - I have a problem that I cannot for the life of me solve. I hope someone can help me out. .NET 2.0 / C# I have an application that is a touch screen application, and as such, I have a main window that is borderless and its initial WindowState is set to Maximized. On top of this main window, I have 3 additional windows that are placed in specific positions calculated using the Screen.PrimaryScreen.Bounds. All of these windows have their Owner property set to be the main window. (Not sure if this info is relevant) Because I do not have a form border, I offer a "Minimize" button that when clicked sets the WindowState of my main window to FormWindowState.Minimized. When the user maximizes the application (either by ALT-TAB or clicking it on the task bar), it maximizes fine, but ---sometimes--- dialogs and forms that I Show() will no longer appear. I believe that the dialog did indeed show, but it is behind my main form. This I find wierd because on every dialog and form that I use, it's owner is set to be the main window. Further, and what is even more confusing, is that when this strange problem occurs, not only can I not bring up any dialog from my application, but I can no longer "ALT-TAB" any other application (i.e.: Windows Explorer, IE, etc.) to bring it into view. When I select it via ALT-TAB or by the task bar, it gets selected, but nothing seems to be able to appear on top of my main window. I am lost and it seems that Windows itself is having issues on bringing a window or application to the top of the Z order. Does anyone have any suggestions? Tag: Text in drop down list of combo box is not visible Tag: 106025
  - 4
    - Problem with form control's repaint after migration to .Net 1.1 I have a large application with the complicated UI. The main form is filled with the dockable custom controls. it works like this: custom controls deriving from Panel was created and serves as a placeholders, regular panel with some enhanced functionality. The user control consisting of regular .Net controls (labels, buttons, datepickers) was created and dropped on the custom Panel control. The application was built with the .net 1.0. Currently, I'm upgrading the application to run on the .Net 1.1. Everything is fine, but some of the custom controls are not getting repainted at proper times (minimize/maximize/another form over it, so on). Each control is designed as a separate class, with the Invalidate() triggering OnPaint() method and the proper repaint code in the overriden OnPaint(). Like I said, everything works fine on the 1.0. Some additional info: not all of the controls are not repainted. Another control (TabControl) that was also derived from Panel refreshes just fine. The code from the OnPaint() is rather long, that's why I'm not posting it. But it works fine on the .net 1.0. The testing machine has the same configuration (XP SP2). Please advise. An additional piece of information. At one time, I used Application.DoEvents() to repaint the invalidated area. Once I converted the app into 1.1, the execution of the program alsways stopped during the execution of the Application.DoEvents. Later I changed it to Refresh(0 and it works fine now. Thanks in advance, Alex Tag: Text in drop down list of combo box is not visible Tag: 106023
  - 5
    - ComboBox and column values I have a combo box that shows 9 columns. How do I populate 9 textboxes with the values from the 9 columns from the selected row? Tag: Text in drop down list of combo box is not visible Tag: 106022
  - 6
    - C#, Form, ReportViewer => Print questions... a) with and b) without the Print dialog showing: How can I interupt the process after a click from the ReportView Print button, access the default printer settings, change the page orientation to landscape, set the page margins and print the report? Thanks in advance, Kjartan Tag: Text in drop down list of combo box is not visible Tag: 106021
  - 7
    - Hosting MMC 2.0 snap-in This may be a long-shot, but has anyone ever hosted an MMC 2.0 snap-in inside a Windows Form? Specifically, I would like to provide the Authorization Manager UI from an administrative portion of my application. A back-up plan is, of course, to launch the MMC as a separate process, but I was trying to avoid that if possible. Thanks, Phil Tag: Text in drop down list of combo box is not visible Tag: 106019
  - 8
    - add item I know this shouldn't be that difficult, but, could someone give me the best practice code to add an item to a database in VB when you have a dataset containing only a subset of the full table and the item has an autoincremented ID? It seems adding the item to the dataset and then updating is not the correct way since it is not the complete table. Tag: Text in drop down list of combo box is not visible Tag: 106015
  - 9
    - User Control's childcontrols have wrong size Hi, I have a c# usercontrol that embeds two buttons as children. The buttons are not normal visual studio buttons but usercontrols themselves made with vb.net if that matters... At runtime the control works ok everywhere and the size of the childer is Size(114,48) In design-time, the user control works in many Visual Studio projects, but not on one project! The child buttons are way too big at design time. Something like Size(190,76). I actually set the Size of the child controls in the contructor of the user control to Size(114,48), but something overrides it in designer to larger size. This is annoying since of course the form does look funny at design time with too large buttons inside a user control. Anyone found a similar thing happening? -pom- Tag: Text in drop down list of combo box is not visible Tag: 106013
  - 10
    - Allitcertkiller.com study guides are cheaper than Testking.co.uk guides Allitcertkiller.com study guides are cheaper than Testking.co.uk guides Tag: Text in drop down list of combo box is not visible Tag: 106010
  - 11
    - Question on Control.InvokeRequired and Cross UI Thread call? Hi, From MSDN documentation, it implies that any cross ui thread calls will result in InvalidOperationException when one tries to access a UI object from a non-creation thread. I have a situation where someone is executing some code in a thread pool (Threading.IsThreadPoolThread is true and so if Form.InvokeRequired is true) and yet when it calls // this.mainTabControl.InvokeRequired is true TabControl tc = this.mainTabControl.TabPages[i]; it does not throw the InvalidOperationException, why? Is this because it is not actually accessing the UI part of the control? If is like going through its internal list? Thanks. Leon Tag: Text in drop down list of combo box is not visible Tag: 106009
  - 12
    - Datagrid problems Hi I have 2 problems with a datagrid problem 1 I use a datatable as datasource and I don't want the last row to be visible (the one where you can add new rows) how can I do this? problem 2 I use the folowing code to hide some columns to the user dataGrid_practicegrid.TableStyles[0].GridColumnStyles[3].Width = 0; dataGrid_practicegrid.TableStyles[0].GridColumnStyles[4].Width = 0; and it works the first time the code is executed, but when I repress the button that executes this code the columns becomes visible again.. I find this very strange. Tag: Text in drop down list of combo box is not visible Tag: 106007
  - 13
    - Accessing an Exchange/Outlook e-mail from our application ... We have a WinForms v2 application whereby users need to take incoming customer e-mails and place them into the customer's record in SQL Server 05 using drag and drop. We've finally managed to get most of the DnD issues resolved. Now, we need to figure out how to best get a handle to the e-mail messages. The way we see this working is the user will have their Outlook client running on their desktop, along with the WinForms application (it's a customer service app). The user will open and read the e-mail - to see who it's from, subject, where it should be stored, etc., etc. - then "drag and drop" the message on to the Customer's record in our application. We have never programatically worked with Exchange, or Outlook, before and are curious where best to start? I'd say we need to get to fields like Sender, Subject, Date & Time, and the Body. Does anyone know of a class that represents e-mail messages that we can use in this way? Appreciate any and all help - thanks. -- Stay Mobile Tag: Text in drop down list of combo box is not visible Tag: 106005
  - 14
    - Installer Dialog problem Iâ??m trying to create an installer for an application. The installer has a custom dialog with two checkboxes determining if shortcuts should get created on the desktop and in the Start menu. Regardless what I do, and what I check the shortcuts always get created in both. In the User interface Setup I have: Checkboxes (A): Checkbox1Label Desktop Checkbox1Property CHECKBOXA1 Checkbox1Value Unchecked Checkbox1Visible True In the FileSystem/Userâ??s Desktop I have the shortcut defined and the properties are: AlwaysCreate False Condition CHECKBOXA1=Checked Transitive True I have tried all permutations of the condition I can think of (Checked, 1, 0, nothing) even named the checkboxes differently. Nothing helps. Can somebody help? Tag: Text in drop down list of combo box is not visible Tag: 106004
  - 15
    - Drag & Drop ... getting a handle to the file that was dropped. We are attempting to allow our users to use Drag n Drop onto a control in a WinForms v2 application. Within the control_DragDrop() event handler we want to determine the name and location for a file that was dropped onto this control. We are moderately familiar with performing DnD from within our application - we do this between various controls within the app itself - but, a lot to learn when it comes to DnD and external files from outside our application. We are successfully determining that the user is trying to drop a file onto the control with the following code in the DragEnter() event handler: if (e.Data.GetDataPresent( DataFormats.FileDrop )) { Console.WriteLine("A file was dropped ......."); } What we're trying to do now, is create a File object (or something similar that you might recommend) using the file the user has dropped so that we can get to its contents, file name, date it was created, etc., etc. Just not sure how to get the handle to the file?? Thanks -- Stay Mobile Tag: Text in drop down list of combo box is not visible Tag: 106001
  - 16
    - Cursors.Rotate Is there a System.Windows.Forms.Cursors.Cursor object that indicates 'Rotation'? Tag: Text in drop down list of combo box is not visible Tag: 105996
  - 17
    - Word Wrapping ListView ToolTips Mostly I'm happy with the default behavior of the ListView ToolTips in the app I'm working on. In detail view, they display the subitem text if it's too wide for its column. What's silly, however, is that the ListView's ToolTips won't word wrap if the text is very long... they'll happily exceed the screen width, in fact. Using some interop with SendMessage, I can send LVM_GETTOOLTIPS to the ListView's Handle, then send TTM_SETMAXTIPWIDTH to the returned ToolTip handle. I can even verify that the width I'm setting is being set is being stored: on a second SendMessage to the ToolTip of TTM_SETMAXTIPWIDTH, the value I set is being returned. So everything looks good. Except... it doesn't actually work. The ToolTip still won't wrap the text, which does contain plenty of spaces. That's a little puzzling, so I thought I'd pose some questions here. First, would there be more than a single ToolTip control associated with a ListView, so that LVM_GETTOOLTIPS is perhaps returning something other than the control shown when hovering over subitems? And if that's the case, how do I get the correct handle? Second, if I am indeed sending TTM_SETMAXTIPWIDTH to the correct control, why wouldn't the setting be respected? I'm testing on XP SP2, using the .NET 2.0 framework, so things should be pretty current. Thanks in advance for any suggestions! Dave Tag: Text in drop down list of combo box is not visible Tag: 105993
  - 18
    - Datagridview databinding/refresh I have two questions. 1. Is there a way to keep the datagridview datasource constantly bound to a sql db? So that as soon as a change takes place in the db by any user, it is updated on all screens. If so, how is that done? If not, what is the best practice to perform this type of function? 2. In refrence to above, I have a timer that refreshes the data every 3 minutes. One problem here is the screen flickers when it refreshes. How would i resolve this? And, if a user is scrolled to the bottom of the datagridview, when the data refreshes in the grid, the scrollbar automatically goes back to the top. How would i prevent this from happening so the user stays on the record they're viewing. Tag: Text in drop down list of combo box is not visible Tag: 105992
  - 19
    - Disabling rows in datagridview Hi, I am new to the forms world and have a silly doubt. I have form with a DataGridview and an "Add" button. When the user clicks on the add button, one row gets added to the datagrid. Now I want that when the user hits the "Add" button, then new row should be added and all the previous rows should be disabled for selection/editing. How can I disable previous rows for selection/editing? Here is my sample code (just example..won't compile) private void buttonAdd_Click(object sender, EventArgs e) { // Add new row DataRow row; row = diagnosticsTable.NewRow(); // Then add the new row to the collection. row["DIAGNOSTIC_NAME"] = "AddDiagnosticsName"; row["DIAGNOSTIC_DESCRIPTION"] = "AddDiagnosticsDescription"; row["SYSTEM_NAME"] = "Newsys"; diagnosticsTable.Rows.Add(row); this.dataGridViewDiagnostic.CurrentCell = this.dataGridViewDiagnostic[1, 0]; } Thankyou... Tag: Text in drop down list of combo box is not visible Tag: 105991
  - 20
    - databinding in form conctructor Hello, a strange, but probably simple, problem drives me nuts: I have simple databinding of textbox to bindingsource(bound to dataset), created in form constructor: public Form3(string xyz) { InitializeComponent(); Program.bs.AddNew(); textBox1.DataBindings.Add("Text", Program.bs, "cmType"); textBox1.Text = xyz; // <-nothing happens } all I want is to add a new row to dataset, and set a value of column "cmType" programatically in form constructor. Problem is that result of program above is blank textBox1, and no data in "cmType". If i fill textBox1 in onFormShow event, everything goes ok. Anyone can help? thx Tag: Text in drop down list of combo box is not visible Tag: 105990
  - 21
    - C# ComboBox help plz. Hi all, How do I get C# to populate a ComboBox with files from a folder? They'll then be displayed into a DataGridView, but I think I got that under control. Another Q... if I wanted to make the ComboBox display the files in sub selections like this: Arts.resx Arts.01.resx Arts.02.resx Movies.resx Movies.ab.resx Movies.cd.resx Not in alphabetical order but just match similar names? Any help thanks. Much appreciated :-) Tag: Text in drop down list of combo box is not visible Tag: 105987
  - 22
    - on datagridview row selection... Hi all, I'm a bit stuck with a method I'm trying to implement... I have a datagridview that displays XML data, I want to select the row & display the "value" column field of that rows contents to a TextBox... then edit it there, then click on insert button to add the text to the selected row column "value" ? Also ... I may be typing in Japanese or French in the TextBox, so is TextBox ok to use or should I use RichTextBox & will datagridview be capable of displaying these characters once I save them to XML? Thanks In Advance. Tag: Text in drop down list of combo box is not visible Tag: 105984
  - 23
    - Alternative update location for click once application Hi Everybody, At the moment I have a project which is being updated from a http server. What I want to do is to change the update location from client side. I am deploying the updates manually meaning I am creating manifest files by hand. Forexample think of 3 servers. Asia, europe and Us. The default is that Asia updates from Asia, Europe from Europe an so on. But what I need is when Asia is down then Asia clients can try Europe and US servers. Is there a way to do this? I will really appreciate if anyone can help. Thanks, Tag: Text in drop down list of combo box is not visible Tag: 105982
  - 24
    - Repaint order of invalidated child controls Hi, I'm developing a hex editor control, and it displays the hex and raw views into the document using a number of subcontrols. This is great, but now I'm seeing a bug when I scroll my control very fast. How it should look: http://www.omega-prime.co.uk/files/invalidate-desired.png How it does look: http://www.omega-prime.co.uk/files/invalidate-bug.png Since scrolling the control forces all the subcontrols to invalidate, and they repaint separately, it can occur that they get out of sync on screen (in this case, the selection is clearly different for each control). This, however, would be OK if I could just get Windows to redraw the least recently repainted control first (the flicker would become unnoticable). The problem is that this doesn't seem to be possible. The order in which I issue Control.Invalidate calls is irrelevant! For example: INVALIDATE TextAdapter INVALIDATE SeparatorAdapter INVALIDATE HexAdapter INVALIDATE SeparatorAdapter INVALIDATE AddressAdapter PAINT AddressAdapter PAINT SeparatorAdapter PAINT HexAdapter PAINT SeparatorAdapter PAINT TextAdapter This can lead to situations like this (when scrolling fast): INVALIDATE AddressAdapter // Scrolled for the first time, invalidate everything INVALIDATE SeparatorAdapter INVALIDATE HexAdapter INVALIDATE SeparatorAdapter INVALIDATE TextAdapter PAINT AddressAdapter // Windows starts to paint... INVALIDATE AddressAdapter // Scrolled again, only invalidate what needs redrawing in a vain hope that repaints work as a queue PAINT AddressAdapter // Windows starts to paint again, but not as a queue, so e.g. AddressAdapter is always redrawn with top priority, leading to the bug PAINT SeparatorAdapter PAINT HexAdapter PAINT SeparatorAdapter PAINT TextAdapter So, is there a clean way to make invalidate events occur in order? Or is there a better way to handle this graphical bug? Thanks in advance! Max Tag: Text in drop down list of combo box is not visible Tag: 105981
  - 25
    - .net 3.0: transparent windows? Hi, For those who have the lucky opportunity to test vista rc2, the sidebar's Add Gadget window has a nice transparency in aero. I was wondering if anyone knew the code to reproduce a similar transparent window? Thanks all, Timothy. Tag: Text in drop down list of combo box is not visible Tag: 105979
- Next
  - 1
    - tooltip problem on framework 2.0 Hi all, I am experiencing a strange problem for the call setToolTip while running my application on frmaework 2.0. I have found 2 messages on google discussing the same issue but there are no replys It dumps saying something like System.InvalidOperationException: Adding the tip to the native ToolTip control did not succeed. at System.Windows.Forms.ToolTip.SetToolInfo(Control ctl, String caption) at System.Windows.Forms.ToolTip.CreateRegion(Control ctl) at System.Windows.Forms.ToolTip.CreateAllRegions() at System.Windows.Forms.ToolTip.get_TopLevelControl() at System.Windows.Forms.ToolTip.CreateRegion(Control ctl) at System.Windows.Forms.ToolTip.HandleCreated(Object sender, EventArgs eventargs) at System.Windows.Forms.Control.OnHandleCreated(EventArgs e) at System.Windows.Forms.Control.WmCreate(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.Label.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) The strange thing about this that it cannot be caught in the try catch blocks. Actually I have set the tooltip to most of the controls in my application. It sets and displays it properly but somewhere in the middle it dumps. The trace I am getting won't tell me exactly to which tooltip it dumps so I am not able to figure out exactly. Does anybody has found any solution for such problem Thanks in advance Tag: Text in drop down list of combo box is not visible Tag: 105978
  - 2
    - The cost of Invoke()... can it be done faster? This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C6F459.ACA68A20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi guys.. I've got a function that copies one file to another location. The file = it copies is currently about 36mb. I've got an event being fired after = after every 32k buffer read from FileStream.Read(), containing the bytes = read thus far and the total bytes to read. When I don't invoke to update the UI status, the copy currently = completes in just under 3 seconds. With a UI status invoke, it takes 23 = seconds. Essentially this is my event handler: if (this.InvokeRequired) { this.Invoke(new ProgressRaiseDelegate(progEvent), e); } And progEvent simply involves setting a progress bars value to the = current value. Is there a way this can be significantly sped up? Cheers. ------=_NextPart_000_0008_01C6F459.ACA68A20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.5700.6" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hi guys..</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I've got a function that copies one = file to another=20 location. The file it copies is currently about 36mb. I've got an event = being=20 fired after after every 32k buffer read from FileStream.Read(), = containing the=20 bytes read thus far and the total bytes to read.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>When I don't invoke to update the UI = status, the=20 copy currently completes in just under 3 seconds. With a UI status = invoke, it=20 takes 23 seconds.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Essentially this is my event = handler:</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT><FONT color=3D#0000ff size=3D2> <P><FONT face=3D"Courier New">if</FONT></FONT><FONT face=3D"Courier = New"><FONT=20 size=3D2> (</FONT><FONT color=3D#0000ff size=3D2>this</FONT></FONT><FONT = size=3D2><FONT=20 face=3D"Courier New">.InvokeRequired)<BR></FONT><FONT=20 face=3D"Courier New">{<BR>    </FONT></FONT><FONT=20 face=3D"Courier New"><FONT color=3D#0000ff size=3D2>this</FONT><FONT=20 size=3D2>.Invoke(</FONT><FONT color=3D#0000ff size=3D2>new</FONT><FONT = size=3D2>=20 </FONT><FONT color=3D#008080 = size=3D2>ProgressRaiseDelegate</FONT></FONT><FONT=20 size=3D2><FONT face=3D"Courier New">(progEvent), e);<BR></FONT><FONT=20 face=3D"Courier New">}</FONT></FONT></P> <P><FONT size=3D2><FONT face=3DArial>And progEvent simply involves = setting a=20 progress bars value to the current value. Is there a way this can be=20 significantly sped up? Cheers.</FONT></P></FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C6F459.ACA68A20-- Tag: Text in drop down list of combo box is not visible Tag: 105974
  - 3
    - How to insert a row at the top of the datagrid? This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C6F42D.3D809360 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi: I have a problem to insert a row at the top of the datagrid. In the data = table (the datasource of the datagrid), no matter I insert the datarow = at 0 or rows.count-1 position, the new row always appear at the bottom = the datagrid, but I want it appear on the top. How can I do it? Thanks, Dennis Huang ------=_NextPart_000_0006_01C6F42D.3D809360 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2912" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT size=3D2>Hi:</FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2>I have a problem to <FONT size=3D1>insert a row at = the top of=20 the datagrid. In the data table (the datasource of the datagrid), no = matter I=20 insert the datarow at 0 or rows.count-1 position, the new = row always=20 appear at the bottom the datagrid, but I want it appear on the top. How = can I do=20 it?</FONT></FONT></DIV> <DIV><FONT size=3D1></FONT> </DIV> <DIV><FONT size=3D1>Thanks,</FONT></DIV> <DIV><FONT size=3D1></FONT> </DIV> <DIV><FONT size=3D1>Dennis Huang</FONT></DIV></BODY></HTML> ------=_NextPart_000_0006_01C6F42D.3D809360-- Tag: Text in drop down list of combo box is not visible Tag: 105973
  - 4
    - Access form from component Hello. I have created a custom component. At run-time I need to access the Form that is hosting my component from inside my component. Is this possible? Thanks in advance. Tag: Text in drop down list of combo box is not visible Tag: 105972
  - 5
    - DataGridView / EndEdit and CellValidating event Hello I have a DatagridView with a checkBoxColumn. When I Check with mouse a row (and so toggle the checkBox) I want launch a EndEdit() method on my DataGridView I can do this with an tips : I create a class inherits from DataGridViewCheckBoxCell and plug an instance on my column by CellTemplate property, this class override OnMouseDown method ... BUT I want launch something like CellValidating event on my datagrid (or somewhere) to intercept the check and perhaps cancel the user's change (becaule a rule will not be respected) this event is not launched !! :-( It is just launched When I change the current cell !! How can I do this ? It seem very basic functionnality, It is certainely possible to do this, but How ???? thanks for your help ! Tag: Text in drop down list of combo box is not visible Tag: 105971
  - 6
    - Question regarding MDI Hello, I am VERY new to WindowsForms but VERY eager to learn. I am in the process of creating an MDI application to manage High Sensitivity Customers within our organization. I am working on the first form which will host the login controls to the application. I noticed that when I change the type of the form to an isMDIcontainer to TRUE the background color of the application changes to dark grey. No matter what I do I cannot change the background color. This is really ugly. I even tried a background color however, when I change the controls background to transparent, they are wrapped with that dark grey color instead. Does anyone have any ideas or resources I can view to rectify my issue? Thank you very much. Tim EggHeadCafe.com - .NET Developer Portal of Choice http://www.eggheadcafe.com Tag: Text in drop down list of combo box is not visible Tag: 105962
  - 7
    - ListView ownerdraw column headers I have a question for anyone who might be able to help... I am in the process of building a custom listview, and am dealing with sorting, and wanting to use the asc/desc sort indicators in the column header... i have tried setting the parent's SmallImageList property and using those images as sort order indicators, but the ListView items also try to use those images, which screw up the way the ListView renders in some situations. Drawing the column header is an easy enough way around this, but I am running into trouble with dealing with the mouse over behaviour. I attempt to access the MousePosition, and then test if the bounds of the columnheader contain that point. This works just fine - however... When you are moving from one column to another, from right to left (this is the important part), the rightmost column (the one you just came from) still evaluates the e.Bounds.Contains(this.PoiintToClient(Control.MousePosition)) expression to 'True'... Additionally, in the same Right to left motion, the columns' "hover" seems to be off by one (delayed) as you mouse over... So, if we have 4 columns {0,1,2,3} and we are moving Right to Left, without leaving the vertical bounds of the ListView's column header... If the mouse cursor is over column... [3] --> [3] is "highlighted" [2] --> [3] is "highlighted" [1] --> [3] and [2] are "highlighted" [0] --> [3] [2] [1] are all highlighted. I don't understand entirely why this might be. Since it doesn't exhibit any of this behaviour at all when you move over the columns from Left to Right, I am guessing that the column header might "virtually" extend all the way to the left, or something like that... Is there a better way to determine whether or not the mouse is hovering over the specific bounds of the column header? Find the ColumnHeader OwnerDraw code below... Thanks for any help you might be able to provide... protected override void OnDrawColumnHeader(DrawListViewColumnHeaderEventArgs e) { e.DrawDefault = false; Color normal = SystemColors.Control; Color hover = SystemColors.ButtonHighlight; Color hoverPress = Color.LightGreen; Color normalBorder = SystemColors.InactiveBorder; Color hoverBorder = Color.FromArgb(227,145,79); Color verticalDiv = SystemColors.Highlight; RectangleF txtRect = RectangleF.Empty; Point mPoint = this.PointToClient(Control.MousePosition); bool MouseHover = e.Bounds.Contains(mPoint); Brush bgBrush; if (MouseHover) bgBrush = new SolidBrush(hover); else bgBrush = new SolidBrush(normal); e.Graphics.FillRectangle(bgBrush, e.Bounds); SizeF txtSize = e.Graphics.MeasureString(e.Header.Text, this.Font); switch (e.Header.TextAlign) { case HorizontalAlignment.Left: txtRect = new RectangleF( 4 + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; case HorizontalAlignment.Center: txtRect = new RectangleF( (e.Bounds.Width - txtSize.Width) / 2 + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; case HorizontalAlignment.Right: txtRect = new RectangleF( (e.Bounds.Width - (e.Bounds.Width - txtSize.Width)) + e.Bounds.Left, (e.Bounds.Height - txtSize.Height) / 2, txtSize.Width, txtSize.Height ); break; } e.Graphics.DrawString(e.Header.Text, this.Font, Brushes.Black, txtRect); Brush divBrush = new SolidBrush(SystemColors.Highlight); Brush borderBrush = new SolidBrush(normalBorder); //Draw the vertical divider if we aren't hovering if (MouseHover) borderBrush = new SolidBrush(hoverBorder); if (!MouseHover) e.Graphics.DrawLine(new Pen(divBrush, 1.25F), e.Bounds.Right - 2, e.Bounds.Top + (0.20F * e.Bounds.Height), e.Bounds.Right - 2, e.Bounds.Bottom - e.Bounds.Height / 3); // draw bottom border e.Graphics.DrawLine(new Pen(borderBrush, 2.0F), e.Bounds.Left, e.Bounds.Bottom - 1, e.Bounds.Right, e.Bounds.Bottom - 1); base.OnDrawColumnHeader(e); } Tag: Text in drop down list of combo box is not visible Tag: 105955
  - 8
    - Show ToolTip on every Control continuously Hi, Using VB.NET 2.0, Windows Forms. I want the ToolTip to be shown on every TextBox, ComboBox and DataGridView continuously, and show the contence of these controls. Is there a way to add the ToolTip automaticly for all these controls, without having to link it the whole time to them for every new Control I put on my Forms? And regarding the DataGridView: The ToolTip doesn't show the whole value of every Cell, but cuts it off when it's too long. how to get around this? Thansk a lot in advance, Pieter Tag: Text in drop down list of combo box is not visible Tag: 105954
  - 9
    - MenuStrip I want to close MenuStrip. How to do that? I send ALT with SendKeys.Send("%") and MenuStrip is closed. It's OK but sendkeys isn't ok for me in all cases. What another way to close MenuStrip? Which method invokes SendKeys.Send("%") in MenuStrip class? Whitch method is executed before MenuStrip.Deactivate event? charlie Tag: Text in drop down list of combo box is not visible Tag: 105953
  - 10
    - TypeConverter derivations failing to convert to InstanceDescriptor Setup: I have a C# 2.0 Conrol Library project and a Windows Form project in a solution. I am developing winform controls in teh library and the winform project has just a single form for testing these controls. The library project is referenced by the winform proect using a project reference rather than a static dll. Some of my controls require custom TypeConverters, basically so I can sort the properties and handle string to control conversions, etc... I actually derive from ExpandableObjectConverter to take advantage of some of the extra features of that type,specifically relating to PropertyGrid usage. Problem: If I drop one of my controls on the test form, everything works just fine. However, if I make any changes whatsoever to the control, even if it is to add a comment, and recompile, the control is no longer able to serialize properties of the type that is using my custom converter. I get errors such as the following: "Code generation for property 'TabStyle' failed. Error was:''SuperTabStyleConverter' is unable to convert 'INTZControls.SuperTabStyle' to 'System.ComponentModel.Design.Serialization.InstanceDescriptor'.'" I also occasionally get the following error: "Unable to cast object of type 'INTZControls.Tabstrip3D' to type 'INTZControls.TabStrip3D'." I assume the second one is due to the fact that the controls are no longer binary compatible, but this is just a guess. The first one just blows my mind. If I do a full recompile, shut and restart VS2005, everything works again. The other concern I have is that this code runs without any problems within VS2003, even after making significant changes to the control source. Here is an example of one of my type converters: public class TextStyleConverter : ExpandableObjectConverter { public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) { if ((destinationType == typeof(InstanceDescriptor)) || (destinationType == typeof(string))) { return true; } return base.CanConvertTo(context, destinationType); } public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType) { if (destinationType == typeof(InstanceDescriptor)) { ConstructorInfo ci = typeof(TextStyle).GetConstructor(new Type[] { }); if (ci != null) { return new InstanceDescriptor(ci, null, false); } } else if (destinationType == typeof(string)) { return value.ToString(); } return base.ConvertTo(context, culture, value, destinationType); } public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value) { if (value is string) { return TextStyle.Parse(value.ToString()); } return base.ConvertFrom(context, culture, value); } public override bool GetPropertiesSupported(ITypeDescriptorContext context) { return true; } public override bool GetStandardValuesSupported(ITypeDescriptorContext context) { return true; } public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { return true; } } Here is the definition of the class that uses this converter: [TypeConverter(typeof(TextStyleConverter))] public class TextStyle { /// } Here is the property in the control that uses this class: [Category("Appearance"), Browsable(true), Description("The text style used to display the items in the control"), DefaultValue(typeof(TextStyle), "Microsoft Sans Serif, 8.25pt;ControlText;MiddleCenter;Normal"), DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public TextStyle DefaultTextStyle { get { return m_DefaultTextStyle; } protected set { m_DefaultTextStyle = value; this.Refresh(); } } Ideas? Tag: Text in drop down list of combo box is not visible Tag: 105949
  - 11
    - Windows forms with html content Hello, Could somebody tell me how or where can I find information about how to build windows applications but with html content, how to handle button clicks etc... Example apps are like Windows Vista Upgrade Advisor and Norton Antivirus 2006. Thanks! Tag: Text in drop down list of combo box is not visible Tag: 105945
  - 12
    - Controling form loads and redrawing Couple of questions: Is there a way to prevent events form frying until a form initializes (during component initialization) loads? Is there a way form keeping a form from redrawing its self until al the updates and events are completed? It seams to me there was a way to do this in VB6. I am using VB.Net 2005 Thank you, -- Mike Reed Tag: Text in drop down list of combo box is not visible Tag: 105941
  - 13
    - Running a .NET 2.0 App from a network location We have an application that we need to run from the network, however, it uses many assemblies from the directory it is run from. I have already gone down the road of creating a CodeGroup and PermissionSet from the .NET2.0 Configuration tool and the program continues to crash when executed. Is there some way that we can run this app and allow access to all of the assemblies in the remote directory? This will help us in setting up the InstallScript as well for final deployment. Thanks. -Devin Tag: Text in drop down list of combo box is not visible Tag: 105940
  - 14
    - Dynamic MDI problems Hi, I'm creating a game dev kit where I need to switch between MDI and SDI mode. MDI is used when displaying the IDE with editors etc, in SDI mode only the "game" window is displayed, optionally with a few editors remaining open. However, setting MdiParent once the child windows has been Shown() causes strange refresh and focusing problems, e.g. a child window will not receive focus when clicking on anything else than the title bar or resize borders. It's very easy to recreate the problem; I can post the code if necessary. I don't want to Close() the forms and re-open them, because there's a lot of complex data in them that I don't want to have to serialize for loading at re-load time. Can I do anything about this? Tag: Text in drop down list of combo box is not visible Tag: 105938
  - 15
    - How to change the size of the ErrorProvider hint Hi. Is it possible to change the size of the ErrorProvider tool tip? Some of my text messages are to long. thanks and best regards, Jan Tag: Text in drop down list of combo box is not visible Tag: 105937
  - 16
    - Visual Inheritance: Can I add custom properties to properties window? Hi, I created base UserControl for visual inheritance. The base control includes the following property: [Category("Appearance")] [Description("The button text")] [DefaultValue("Hi")] public string ButtonText { get {return this.button1.Text;} set { this.button1.Text = value; } } But the property "ButtonText" does not appears in property window. How can I add property window support to my Visual Inheritance procatice? Thank you, Max Tag: Text in drop down list of combo box is not visible Tag: 105934
  - 17
    - Deployment/Debugging Question Let me preface this by saying I've been primarily an ASP.Net developer over the last few years and have just started working with Winforms. My application will be a standalone program that will access FoxPro database files. A typical installation would install my exe in C:\Program Files\My Company\My Application. I want my database files to go in C:\Program Files\My Company\My Application\Data. I've added the Data folder to my project and selected the build action as content for each Foxpro item inside it. My question is with determining the path to the database files for my connection string. I'll be able to determine the Data folder path using Application.StartupPath. However, when debugging, the exe is compiled and executed from the bin folder. Thus, the database path is incorrect when using Application.StartupPath. How can I simulate the install structure when developing and debugging? Tag: Text in drop down list of combo box is not visible Tag: 105933
  - 18
    - Getting list of Website from IIS "Web Sites" Folder hi guys, few days back i've posted a question regarding how can i get the list of the websites form the IIS, at this location: http://groups.google.com/group/microsoft.public.dotnet.languages.csharp/browse_thread/thread/97f4f07b8b46a397/41372cde30df29e7?lnk=st&q=how+to+get+list+of+websites+from+IIS+C%23&rnum=1&hl=en#41372cde30df29e7 and i got a nice replay. it worked. now the problem is different when i tried the code on the different webserver which has lots of websites but not under the "Default Web Site" directory. most of the Websites are under the "Web Sites" folder. and now i want to retrive all those websites list from the IIS. i tried to get the type of the folder "Web Sites", but i didnt get anything out of it. can anyone tell me how can i get all of the websites from the folder called "Web Sites". Tools: IIS 5.1 on Microsoft Windows Server 2003 C#.net 2005 thanks, Lucky Tag: Text in drop down list of combo box is not visible Tag: 105924
  - 19
    - replicating tooltip functionality I wish to create a tooltip style control to show information about items being dragged in a tree view. My problem is that I cannot capture the mouse in the treeview ( and hence have the tooltip follow the mouse when it moves outside the treeview control ), presumably because once the tooltip is shown it becomes the foreground window. Any possible solutions would be welcome ( I have thought about wrapping the Win32 tracking tooltip, but I require more sophisticated tooltip content than just text ). Thanks, Andrew. Tag: Text in drop down list of combo box is not visible Tag: 105923
  - 20
    - Create a base maintenance form: design and implementation recomendations Hi all, I'm doing a WinForm Project for .NET 2.0 platform and have some design and implementation questions for my UI interface. I have recently discovered that some complex controls (like DataGridView) doesn't works well with visual inheritance (it can't be modified directly in the inherited form although visibility of the control is public or protected). Now I have to do some simple maintenance forms to update/insert/delete users, companies . All are very similar: a DataGridView with some columns, a "Cancel" button and an "Update" button. The DataGridView would be linked to a BindingSource Control and this to a Typed Dataset. What is the best approach to have a base maintenance form to avoid coding in the descendant forms? I want to edit the columns from the DataGridView for every maintenance form to adjust titles, size . Thanks, Alex B. Tag: Text in drop down list of combo box is not visible Tag: 105922
  - 21
    - discarding user actions on a form while in busy state Hi, I can't seem to figure out a decent way to do this. I have a small window, and I need to discard user input while performing some lenghty task. For example, if the user wants to sync the app with a server, and this takes time. The proper behavior would be to change the cursor to a busy cursor, and prevent the user from touching any control on the form. Of course, painting should still be done, and the form should be able to move and resize (user actions like move, resize, maximize, minimize). When the job is done, the cursor changes back to the default one, and the user is able to interact with the received data. I've seen various sugestions: - disable the controls (or the whole form): not good, as the appearance of the controls changes dramatically; also, there seems to be problems with the cursor, it won't show properly on a disabled control (it displays the default cursor, not the one I set); - put a transparent form on top of the current form: I'm interested in this, if anyone can provide bits of code, I would really appreciate it. However, I don't know if this is supported on all systems (I'm interested mainly in XP, Win2003, and maybe Win2000). - catch all events in a WndProc: how do I do this? I've overriden the WndProc of my form, yet not all messages pass through this. I am still able to interact with the controls... I really appreciate any help on this, guys (and girls). :) Cheers, Cosmin. Tag: Text in drop down list of combo box is not visible Tag: 105920
  - 22
    - AnimateWindow and popup window I'mwriting a popup system for my application. I'm using the win32 call ShowWindow to show my window. Now I just stumbled on an other win32 call: AnimateWindow And while that seems very appropriate for the popups it has the very infortunate effect of showing a blank window! All the child control have disappeared! Any idea what going on? -- Regards, Lloyd Dupont NovaMind Software Mind Mapping Software <www.nova-mind.com> Tag: Text in drop down list of combo box is not visible Tag: 105917
  - 23
    - instal basics I can't install dot net charting ver4, build solution without error but in public MainForm(){ InitializeComponent() <<<<< Error ...... } Error= "Couldnot load file assembly 'dotnetCharting.winform", version 4.0.94892324, Culture=neutral, PublicKeyToken=c8374837849' or one of its dependencies can not be found Did i install incorrectly (if so please explain again for me) or my C# express doesn't fit this dotnetcharting ver4 ? Thanks Tag: Text in drop down list of combo box is not visible Tag: 105916
  - 24
    - ListView, ColumnHeader.Width when using multiple Fonts Here is an issue I've been struggling with for a day now, I wanted to share what happened with the group and find out if I have experienced (and worked around) a bug, or if there is something that I missed. I am using Visual Studio .NET 2003 with C#. The goal: I need to make sure that in a ListView control, the columns are drawn wide enough to display the text of the ListViewItems. Here's the catch: ListViewItem.Font may not be the same as the ListView.Font. Problem #1: ColumnHeader.Width does not take Font into account. Should be easy... just use (ColumnHeader.Width = -1), right? Sorry, no. Using the Width = -1 shortcut does not appear to take into account the fact that one of the ListViewSubItems in that column may be using a font that is wider than the ListView.Font. Workaround #1: I used ListView.CreateGraphics to create a graphics object, and then used Graphics.MeasureString() like so: // Assume listView.Font is "Microsoft Sans Serif", 8.25 // Assume listViewItem.Font is "Lucida Console", 8.0 Graphics g = listView.CreateGraphics(); foreach (ColumnHeader ch in listView.Columns) { ListViewItem.ListViewSubItem listViewSubItem = listViewItem.SubItems[columnHeader.Index]; int neededColumnWidth = g.MeasureString(listViewSubItem.Text, listViewSubItem.Font).ToSize().Width; if (ch.Width < neededColumnWidth) { // Make the column wider ch.Width = neededColumnWidth; } } Problem #2: In the above example, the listViewSubItem.Font returns the same value as listView.Font! I would have expected that listViewSubItems would inherit their font from the parent ListViewItem by default. Workaround #2: It is fortunate that the Font is identical for each element of ListViewItem.SubItems, so I just substituted "listViewItem.Font" for "subListViewItem.Font". // Assume listView.Font is "Microsoft Sans Serif", 8.25 // Assume listViewItem.Font is "Lucida Console", 8.0 Graphics g = listView.CreateGraphics(); foreach (ColumnHeader ch in listView.Columns) { ListViewItem.ListViewSubItem listViewSubItem = listViewItem.SubItems[columnHeader.Index]; int neededColumnWidth = g.MeasureString(listViewSubItem.Text, listViewItem.Font).ToSize().Width; if (ch.Width < neededColumnWidth) { // Make the column wider ch.Width = neededColumnWidth; } } Problem #3: With the above code, I can see that the columns are indeed resizing to become wider---but not quite wide enough to display all the text. Problem #4: Even when all the ListViewItems are using the same font as the parent ListView, using (Width = -1) appears to jam the text against the right side of the column---there is no padding on the right side of the column like there is on the left. After doing some research, I believe that this is related to some hardcoded padding versions of .NET, similar to this bug which says, "Internally, the Width of a ColumnHeader is padded with some predetermined constant when it is changed programmatically. This padding is not in effect if the Width of the ColumnHeader is changed through the user interface." http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B179988 This article implies that the hardcoded padding values are 29 for get_Width and 30 for set_Width. Final Workaround: Whenever adding or modifying a ListViewItem or one of its SubItems, I also call the following method instead of simply using (columnHeader.Width = -1;), which appears to do the trick /// <summary> /// Ensures that each column in the list-view is wide enough to the given text written /// in the given font. Normally you can use ColumnHeader.Width = -1 (or -2), but in /// this application there are several ListView controls that use a different font for /// its items and headers. ColumnHeader.Width autosizing appears to calculate the width /// for each ListViewSubItem using the ListView.Font instead of the font of the widest ListView.Item. /// This method is not thread-safe. /// </summary> /// <param name="ch">The column header to be widened. It must have a valid parent ListView.</param> /// <param name="subitem">The subitem whose width is to be measured.</param> private void SetColumnHeaderWidth(ColumnHeader ch, string stringToDisplay, Font fontOfString) { if (null == ch) { throw new ArgumentNullException("ch"); } ListView lv = ch.ListView; if (null == lv) { throw new ArgumentException("The ColumnHeader must have a parent ListView.", "ch"); } // This is used for measuring items for the arguments listview // to make sure the columns are wide enough to see their data. Graphics g = lv.CreateGraphics(); try { int subitemWidth = g.MeasureString(stringToDisplay, fontOfString).ToSize().Width; int defaultStringWidth = g.MeasureString(stringToDisplay, lv.Font).ToSize().Width; // HACK 10-17-06 SEC: When setting the column header width programatically, // it appears to set it just a hair too small for the text you specified. // I believe that this is related to some hardcoded padding where in older // versions of .NET, for example with this bug: // http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B179988 // "Internally, the Width of a ColumnHeader is padded with some predetermined // constant when it is changed programmatically. This padding is not in effect // if the Width of the ColumnHeader is changed through the user interface." // According to the aforementioned article, these hardcoded values are // 29 for get and 30 for set. if (ch.Width < subitemWidth + 29) { ch.Width = subitemWidth + 30; } } finally { // We *must* manually dispose of the graphics now that we are done with it, // per MSDN documentation for Control.CreateGraphics method: // "The returned Graphics object must be disposed through a call to // its Dispose method when it is no longer needed." if (null != g) { g.Dispose(); } } } Since I did say that this post is a question, my questions are: 1. Has anyone else encountered these issues and did you find a better way to resolve them? 2. Are any of these problems known bugs? If so, have they been resolved in more modern releases of Visual Studio .NET/Visual C# ? -- Sarah Cartwright Tag: Text in drop down list of combo box is not visible Tag: 105907
  - 25
    - Dataview.Rowfilter help hey guys I am tring to implement a filter in a datagrid. I am using a datatable which is the datasource for the grid. I need to filter set of rows. i.e. from row 1 to row count. i need to keep my row 0 intact, which is an option to add a new person. textbox key up code looks like this: string strRowFilter = String.Concat("Name LIKE '%", txtName.Text, "%'"); dv.RowFilter = strRowFilter; grdNames.DataSource = dv; plz help sunny Tag: Text in drop down list of combo box is not visible Tag: 105905

I am unable to read any text displayed in the drop down list of a combo box.
Once an item is selected, the text is displayed in the text box area. I
have tried changing all the text properties for the combo box to no avail.
Other (non winform apps) display fine on my system. I have also tried
modifying my desktop color schemes etc.

I'm using Microsoft Visual C# .NET 69586-335-0000007-18554 with Microsoft
Windows XP Professional 5.1.2600 SP 2 build 2600 on a HP Workstations
XW8200.

I would appreciate any help I can get to resolve this issue.

Thanks,
MJC

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Re: Text in drop down list of combo box is not visible by Herfried

Herfried
Tue Oct 24 15:01:09 CDT 2006

"Mitch Carlsen" <mitchelcarlsen@msn.com> schrieb:
>I am unable to read any text displayed in the drop down list of a combo
>box. Once an item is selected, the text is displayed in the text box area.
>I have tried changing all the text properties for the combo box to no
>avail.

Fixing the problem of missing text in controls and message boxes
<URL:http://dotnet.mvps.org/dotnet/faqs/?id=controlsmissingtextbug&lang=en>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

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