Data grid hierarchal navigation

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- Previous
  - 1
    - Launch IE with a complex string Hi I am working on integrating some help modules and i need to launch the browser with a url like X:/WebHelp_WithTOC/index.htm#mergedProjects/ProductA/ProductA_Form1.htm while i can have a form and a webBrwoser control in it and pass this as a URl, i want to specifially launch IE with this page. The standard System.Diagnostics.Process.Start(String filename) does not work in this case. The error is 'the specified file could not be found'. In this function it considers the entire string to be proper path for a file cos the string starts with X:. How can i launch this url in a new instance of IE? Thanks Tag: Data grid hierarchal navigation Tag: 108252
  - 2
    - Textbox copy and paste problem I have create a very simple windows form application. I am using textbox control, but I am unable to copy and paste text into the textbox by using keyboard hot key. Anyone come across this problem before? Thanks Tag: Data grid hierarchal navigation Tag: 108237
  - 3
    - Transparent ContextMenuStrip with non-transparent text Hi, I am trying to implement a context menu that is 50% transparent. Setting the opacity to 0.5 works but unfortunately the texts are also displayed with transparency which makes them very hard to read. Now I would like to draw the menu background with transparency but the text without. I have tried various approaches without success: - Implement a ToolstripRenderer: Draws a gray background despite overriding all overridable methods - Handle Paint event of each menu item: Text gets drawn with transparency Does anybody have an idea how to approach this? Thanks in advance, Hans Tag: Data grid hierarchal navigation Tag: 108234
  - 4
    - Bug or bad design in System.Windows.Form.Form Hi While developing a Windows forms application I encountered what I consider to be a bug or a design flaw: Consider to have 3 Forms namely A B and C. B is owned by A and C is owned by B. If we close A, all three forms should close which is exactly the design described in the class library reference on msdn. However, if the windows run in NON modal mode (i.e. not showed using ShowDialog(IWin32Window), closing A does call the OnFormClosing on A and on B but NOT on C. C gets closed without a way to check for unsaved data, because the FormClosing event doesn't get raised. If window B and C run in Modal mode (ShowDialog(IWin32Window)), C raises the FormClosingEvent (from within the OnFormClosing Method), but setting e.cancle = false will NOT prevent the window from closing, and even worse, the OnFormClosing method will run AFTER the window has already been disposed. Possible Reason: The invaluable resource .NET Reflector gave me some insight to the Implementation of the System.Windows.Forms.Form class. When a window closes, it calls OnFormClosing on all of its MdiChildren and Owned Windows. If e.cancle does not evaluate to false after these calls, the form gets Disposed. Dispose(bool disposing) calls Dispose on all owned forms, and thus it works recursively. But OnFormClosing does NOT. So when I call A.Close() it "asks" B to close, and if B does not set e.cancle, A disposes itself which in turn disposes B and C. So C gets Disposed without a prior call to OnFormClosing and no event rising. Shouldn't the (private) WMClose method in System.Windows.Forms.Form call some RECURSIVE method to check recursively for all owner relationships if the owned forms (in all levels of the owner relationship) can close? Possible workaround: (NOT tested yet) override the OnFormClosing method that it calls OnFormClosing for all owned forms recursively. This however will cause the OnFormClosing method to be called twice for all owned forms that are directly owned by the "root" form, because WMClose calls OnFormClosing on all its directly owned forms, and later calls this.OnFormClosing. The loop which calls OnFormClosing for all owned forms shouldn't be in WMClose but rather in OnFormClosing itself, thus be recursive. For MdiWindows this problem does not exist, because MdiCild Relations can only exist in one level, so for MdiChildren this problem does not exist. But when one closes the MdiParent of an MdiChild which owns some window X, OnFormClosing and the FormClosing Event will NOT be called for X. Has anyone ever encountered problems with this behavior as I did? And how did you solve the problem? I would consider this behavior either a bug or a design flaw! Regards Stephan Tag: Data grid hierarchal navigation Tag: 108232
  - 5
    - ControlDesigner OnMouseDragMove only called once? I am playing with overriding the ControlDesigner OnMouseDragMove. But for some reason it only appears to get called when a control just begins its drag. I was anticipating it to be called for every movement of the mouse during the drag. Am I missing something so that this method is only called once? Is there another method I should be using that will be called for each movement of the mouse? Tag: Data grid hierarchal navigation Tag: 108231
  - 6
    - notification windows a la Outlook Hi all, I've been recently struggling to get to the bottom of this, but can't find the proper way to do this. I have a notification window, which may appear on screen when certain events are received. Currently the notes are created and displayed on the main form's gui thread. It works ok, until you go into 'modal' mode. That is, if there are a modal form and the note simultaneously on the screen, I cannot click on the notify window. There are two scenarios here: first the note pops up, then a modal window is opened; or the other way around: you receive the note while the modal window is on top. In both cases, I can't access the note. I looked at Outlook, how it behaves, and you can access the note (of course, trying to 'open' the email results in a warning message, stating it can't do that while modal windows are opened). I believe Outlook is using a different thread for the notes. I tried to do this, but it's not that easy. Notes must be _created_ (and displayed) on the 'notification thread'. Bottom line: I want to be able to create and display the notes from the gui thread, on the notes' thread (ideally I want only one thread for all notes, not one thread for each note). Any ideas are welcome. Thanks in advance, Cosmin. Tag: Data grid hierarchal navigation Tag: 108227
  - 7
    - VB WinForms Application doesn't inherit from WindowsFormsApplicationBase Hi there, Just out of curiosity.... Looking into Application.designer.vb as part of MyProject i see Partial Friend Class MyApplication <Global.System.Diagnostics.DebuggerStepThroughAttribute()> _ Public Sub New() MyBase.New(Global.Microsoft.VisualBasic.ApplicationServices.AuthenticationMode.Windows) .. End Sub .. End Class how come this class class doesn't or should i say "where does this class" inherit from WindowsFormsApplicationBase? I can see thats its partial and that its calling mybase.new but wheres the rest? Ive looked into the directory using windows explorer but still cant find it. Is this part of the visual studio/ vb compiler hoo doo voodoo? thanks richard Tag: Data grid hierarchal navigation Tag: 108215
  - 8
    - Print Dialog I need to programmically close a PrintDialog form after it is displayed with the "ShowDialog" method in case the user does not dismiss it himself. My app needs to have it time out. How can this be done ? Tag: Data grid hierarchal navigation Tag: 108211
  - 9
    - SystemParametersInfo call hanging. Due to the nature of our application, it is necessary to set a system setting that increases the size of the scrollbars when the application is the "active" one. When it is not, the system setting is reverted so that the scrollbars appear in their normal size. To achieve this, I am overriding the WndProc method and checking if the message received is WM_ACTIVATEAPP, (this is the message received when the application gets focus). Upon receipt, I make a call a call to the user32.dll call SystemParametersInfo to make a change to the scrollbar size. This seems to work just fine, but when my application receives a SystemEvent.PowerModeChanged or SystemEvent.DisplaySettings event, my call to SystemParametersInfo (called via the WndProc override) seems to hang... and I can't figure out why. Does anyone have any ideas on why the call to SystemParametersInfo would hang? It requires the user to kill the application. Thanks, Tag: Data grid hierarchal navigation Tag: 108210
  - 10
    - SystemParametersInfo call hanging. Due to the nature of our application, it is necessary to set a system setting that increases the size of the scrollbars when the application is the "active" one. When it is not, the system setting is reverted so that the scrollbars appear in their normal size. To achieve this, I am overriding the WndProc method and checking if the message received is WM_ACTIVATEAPP, (this is the message received when the application gets focus). Upon receipt, I make a call a call to the user32.dll call SystemParametersInfo to make a change to the scrollbar size. This seems to work just fine, but when my application receives a SystemEvent.PowerModeChanged or SystemEvent.DisplaySettings event, my call to SystemParametersInfo (called via the WndProc override) seems to hang... and I can't figure out why. Does anyone have any ideas on why the call to SystemParametersInfo would hang? It requires the user to kill the application. Thanks, Tag: Data grid hierarchal navigation Tag: 108209
  - 11
    - ANN: TayLayout Release 00.00.15 for IronPython TayLayout Release 00.00.15 for IronPython http://code.google.com/p/taylayout/downloads/list New This Release * Wordsearch generator sample (80% functional) * More controls specially supported (listbox, webbrowser) * More compound controls * Controls can now be right-aligned * Plenty of bug fixes TayLayout is a more sophisticated version of the flow layout - you can add controls to a panel or form and it takes care of positioning them. Controls are added in a Left to Right order until you specify that a new line is required. More info available at http://docs.google.com/View?docid=dd59dk39_2jh3xf9 Thanks, Davy Mitchell Tag: Data grid hierarchal navigation Tag: 108205
  - 12
    - Find the day of the Week I am currently writing a program in Visual Basic .NET and need to be able to find the day of the week when given the date (Ex. 1/20/07). Once the function is given the date it will the deliver the day such as Sunday, Monday, Tuesday and so on. Thank you very much. b89 Tag: Data grid hierarchal navigation Tag: 108202
  - 13
    - Windows CBT Hooks (Help!) I hope you can answer a question. I am writing a poker utility that tracks what windows are open and displays information about opponents that are still playing and their previous history that is stored in a game DB. It is a very cool project with Pattern Recognition (Pixel Screen SCraping to OCR) and pretty advanced calculations. I just started writing my first prototype in C# and discovered that I could not set a System Wide CBT hook. .Net will not allow hooks CBT hooks to be set globally, period! Works for mouse and keyboard, but not CBT. I need to trap when a window is created, destroyed, gotfocus, or resized. I do not want to cancel or redirect those messages. I just need to get new rect information about the window. I have discovered ways of doing it in either VB6 or C++. I am not sure which is the best strategy to pursue. I do not code in either language. Can I have this hook in VB or C++ and then call my C# function? Anone have any suggestions for interacting in between managed and unmanaged code when the unmanaged code needs to trigger a C# method? Thanks, Andy Tag: Data grid hierarchal navigation Tag: 108201
  - 14
    - ImageList performance problem Hi all, I'm experiencing performance problems when adding a large set of bitmaps to an ImageList. The bitmaps are 55x55 pixels in size, which matches the ImageList's ImageSize property. Adding approx. 5000 bitmaps takes about 1,5 minutes. The bitmaps are generated from scratch, resized and other things much faster than that (in just a few seconds) so why should adding them to an imagelist be so slow? The imagelist is also the source for a ListView, which displays the results. I've tried adding the bitmaps to the ImageList via Add(), AddRange() and using the async. virtual mode. The latter sounded promising, but didn't help. Any ideas, hints? Cheers, Johan Sj=F6str=F6m MSc, MCAD, MCTS, MCITP Tag: Data grid hierarchal navigation Tag: 108199
  - 15
    - Where are the 'most often used program' shortcuts stored? Hi, I'm talking about the ones that are displayed in the XP Start menu? Does anyone know where they are/how to get a list of them. Cheers, James Randle. Tag: Data grid hierarchal navigation Tag: 108197
  - 16
    - Reason for Application.ThreadExit Hi, We have the strange problem that sometime in our application Application.ThreadExit is raised and out application shutting down. We do not see any previous exceptions before this event fires. Moreover the Application.ThreadException event is not fired at all, so we have not unhandled exceptions that occurs. We are working with SQL-2005 and with some unmanaged code too. What can be the reason for such behaviour ? And how can we catch such error ? Thanks, Pavel Tag: Data grid hierarchal navigation Tag: 108195
  - 17
    - Render window to video port? Is it possible to redirect the rendering of a windows form to the video port/overlay device of a video card? In my situation I must present the contents of a window on an hdtv and I can't use a desktop clone trick because there's going to be another application running that cannot show up on the tv. Any ideas? Tag: Data grid hierarchal navigation Tag: 108188
  - 18
    - freeware .NET graph library needed Hi! I need such library to make UML modeler with which i'd be able to make UML schemas(primarily for designing software projects).What i'm trying to achieve is to make something like any other UML drawing tool. I've found some commercial ones(yFiles.NET, Essential Diagram)and freeware Netron graph library(but it doesn't contain all UML elements). Thanks! Tag: Data grid hierarchal navigation Tag: 108175
  - 19
    - vs2003 to vs2005 Hi I have a vb.net 2003 database winform app which uses non-bound controls and the associated plumbing is done in code. If I move it to vs 2005 would it work without any change? Thanks Regards Tag: Data grid hierarchal navigation Tag: 108169
  - 20
    - Moving the MdiClient area I programmatically moved the MdiClient of my MDI form to be nested inside a Panel so I can control the layout better. I also removed the 3D border on the MdiClient using Interop. When trying to open MDI child forms, I first received an error about the parent not being an MDI container. I suspected this was because I moved the MdiClient, so I set IsMdiContainer back to true after the move. I no longer get the error, but now the MDI children don't display at all. I'm assuming I need to hook the MdiClient back up to the parent form somehow. How do I do this while keeping the MdiClient nested in a Panel? TIA Jared Tag: Data grid hierarchal navigation Tag: 108168
  - 21
    - VS 2005 SP1 Hi I am almost finished with a vs 2005 (pre sp1) project which I need to deliver in the next couple of days. I am wondering if I should deliver project with sp1. Is it safe to install sp1 at this late stage? Thanks Regards Tag: Data grid hierarchal navigation Tag: 108166
  - 22
    - "UpdateEvent" I'm looking for some kind of form level event that I can hook/add/use to tell me when ever some input control has changed its state. As a hack currently I set KeyPreview to true and hooked the KeyPress event. This works great for text boxes etc, but if a user uses the mouse to select someting in a listbox it doesnt catch it of course. The idea is something like this, in the even I want to check the state of the inputs and enable disable for example the Save button. Delphi had a neat way to do this with actionlist and I know there are free and 3P action lists for .NET, but this is an existing WinForms app and I cant redo it. I just need a basic event I can hook to properly enable/disable controls. The other "hack" option is a timer, but thats pretty ugly too. I've also considered hooking into the windows message pipe and ignoring obvious ones like WM_Paint etc, but again I'd like to avoid this and find something else. Anyone have any suggestions? -- Chad Z. Hower Microsoft Regional Director "Programming is an art form that fights back" http://www.KudzuWorld.com/ Need a professional technical speaker at your event? http://www.woo-hoo.net Tag: Data grid hierarchal navigation Tag: 108161
  - 23
    - Flashing scrollbar on MDI child window after cursor key hit! My application has a main form with its "IsMdiContainer" set to 'true'. I create a form to serve as a child form, setting its "MdiParent" to the main form before calling its "Show()" method. The "AutoScroll" property is set to 'false'. My child form class has two scroll bars which I added manually; an HScrollBar and a VScrollBar. Each of these scroll bars has its "TabStop" property set to 'false'. (As mentioned above, the "AutoScroll" property of the child form class is set to 'false'; I do not want to use the form's automatic scroll bars.) Any instance of the child form properly has its OnKeyDown() handler triggered when the child form has focus and regular keys are pressed. All works great -- until I press a cursor key (i.e., up, down, left, right). When I press a cursor key, one of the scroll bars starts to scroll, and starts to flash! When I release the cursor key, the scroll bar continues to flash, and no other key events are received by the child window. Wait... I just solved my own problem! Override OnPreviewKeyDown(), and then disable each scrollbar (set its "Enabled" property to 'false'), and call Invalidate(false) to put a repaint message in to the queue for the form. When the scrollbars are disabled, this is evidently enough to prevent the cursor key from finding a scrollbar and locking to it, starting the flashing, and capturing the input. Upon repaint we can set the Enabled property of the scrollbars back to 'true' if appropriate. Whew! I thought I was going to have to implement my own "MDI" logic instead of using the "IsMdiContainer" feature. Wow, the worst part about Windows Forms is the crazy logic concerning how cursor key events, mouse wheel events, focus, and other things are handled... What next?! Anyhow, I am sharing my discovery for the benefit of others. --- Colin Tag: Data grid hierarchal navigation Tag: 108136
  - 24
    - How to iterate over a combobox's items? Say cbRoadwayType is my combobox: for (int i = 0; i < cbRoadwayType.Items.Count; i++) { cbRoadwayType.SelectedIndex = i; int val = (int)cbRoadwayType.SelectedItem // INVALID EXCEPTION cast if (val != FILTER_ALL && val != FILTER_NOT_SET) { roadwayList.Add(val); } } But, I get an invalid exception cast. How do I just get the value of the combobox item, based on an index?! Tag: Data grid hierarchal navigation Tag: 108132
  - 25
    - Packaging registry file only, please Hi! Is there a way to package registry file only? I can not seem to find the way using VS 2003 & Package and Deploy Wizard. In a nutshell, I need to merge a .reg file to create some keys + values. I need to create an .msi package as our clients do not accept anything else. I can not really write a program that does it programmatically and then package it. Any help is greatly appreciated. Many thanks in advance, Tag: Data grid hierarchal navigation Tag: 108131
- Next
  - 1
    - Multiline TextBox with Autocomplete? I have noticed that Autocomplete stops working when you set a TextBox to Multiline. Is this the designed behavior? Is there any way to make it work, other than developing your own custom control? I would also like to see a behavior where the list of suggested items resets after each space, so in other words you could use Autocomplete multiple times in the same TextBox. Do I have to start developing my own control for this? -- Paul Fountain, Software Engineer InsureMe Tag: Data grid hierarchal navigation Tag: 108117
  - 2
    - Is .NET no good for some things? This is a multi-part message in MIME format. ------=_NextPart_000_001E_01C7362A.C4679EC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It used to be simple in Basic to "open" a printer (like LPT1), then = "write" ASCII characters to it. Alternatively, one could create a = text-file, then a simple DOS copy operation could copy the text file to = a printer using shell. There is no documentation to indicate how this = might still be accomplished=20 Does anybody know if one can still "copy" a file to a windows printer = i.e. use shell to dump a text file to a device (e.g. \\main\HP Laser = which might be a printer attached to one of the nodes of the network or = perhaps to 192.168.1.20 which might be the IP address for a network = printer)? I believe copy can still be done if one maps a device to LPT1 = or something. However, I'm not sure about how to do this using the = network name or the IP address of the printer if it is not connected as = a shared resource of a PC Thanks and have a great day! Bill Angus, MA http://www.psychtest.com ------=_NextPart_000_001E_01C7362A.C4679EC0 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 6.00.2800.1586" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>It used to be simple in Basic to "open" = a printer=20 (like LPT1), then "write" ASCII characters to it. Alternatively, one = could=20 create a text-file, then a simple DOS copy operation = could copy=20 the text file to a printer using shell. There is no documentation to = indicate=20 how this might still be accomplished </FONT></DIV> <DIV> </DIV> <DIV><FONT face=3DArial size=3D2>Does anybody know if one can still = "copy" a=20 file to a windows printer i.e. use shell to dump a text file to a=20 device (e.g. <A href=3D"file://\\main\HP Laser">\\main\HP = Laser</A> =20 which might be a printer attached to one of the nodes of the network or = perhaps=20 to 192.168.1.20 which might be the IP address for a network printer)? I = believe=20 copy can still be done if one maps a device to LPT1 or something. = However, I'm=20 not sure about how to do this using the network name or the IP address = of the=20 printer if it is not connected as a shared resource of a = PC</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks and have a great day!</DIV> <DIV> </DIV> <DIV>Bill Angus, MA<BR><A=20 href=3D"http://www.psychtest.com">http://www.psychtest.com</A></FONT></DI= V></BODY></HTML> ------=_NextPart_000_001E_01C7362A.C4679EC0-- Tag: Data grid hierarchal navigation Tag: 108114
  - 3
    - Added integrated help to my application Hi, I'd like to add help functionality to my application. I like how the integrated help displays in Visual Studio, and would like to simulate this in my own application. What technologies / components would I need to look at to get this working? I would want the viewer on its own form, which would be set as an MDI child. Thanks Andy Tag: Data grid hierarchal navigation Tag: 108112
  - 4
    - How do I stop FlashWindowEx when me.handle gets focus? Hi.... I'm using FlashWindowEx to flash the taskbar and titlebar when my processes are done. I set the number of flashes to 5. But when the user returns to the window the flashing continues until all 5 flashes complete. How do you stop the flashing once the user returns to the app.? (Code Below) Thanks for any help, Marc Miller Public Structure FLASHWINFO Public cbSize As Int32 Public hwnd As IntPtr Public dwFlags As Int32 Public uCount As Int32 Public dwTimeout As Int32 End Structure Private Declare Function FlashWindowEx Lib "user32.dll" (ByRef pfwi As FLASHWINFO) As Int32 Private Const FLASHW_CAPTION As Int32 = &H1 Private Const FLASHW_TRAY As Int32 = &H2 Private Const FLASHW_ALL As Int32 = (FLASHW_CAPTION Or FLASHW_TRAY) Public Sub FlashNow(ByVal sender As System.Object, ByVal e As System.EventArgs, ByVal iTimes As Integer) Dim flash As New FLASHWINFO flash.cbSize = System.Runtime.InteropServices.Marshal.SizeOf(flash) '/// size of structure in bytes flash.hwnd = Me.Handle '/// Handle to the window to be flashed flash.dwFlags = FLASHW_ALL '/// to flash both the caption bar + the tray flash.uCount = iTimes '/// the number of flashes flash.dwTimeout = 1000 '/// speed of flashes in MilliSeconds ( can be left out ) '/// flash the window you have specified the handle for... FlashWindowEx(flash) End Sub Tag: Data grid hierarchal navigation Tag: 108101
  - 5
    - access another forms controls & properties at runtime how can you access a control on a form from another form at runtime. For example to set the datasource and datamember properties of a forms binding source from a different form? I am trying to do something like: form test = new form(); test.show(); test.bindingsource.DataSource = bla bla; Tag: Data grid hierarchal navigation Tag: 108091
  - 6
    - Using variable as form field name Hi I have two fields field1 and field2 on my form. Is there a way that the field names can be accessed via variable so that choice of the actual field to access is decided at runtime? Thanks Regards Tag: Data grid hierarchal navigation Tag: 108090
  - 7
    - Is this normal Hi there, Is it normal for form-based events to fire in "InitializeComponent()". I've got a "DataGridView" on a form and I set its "CellValueChanged" event using the forms designer. Ok, VS initializes my event in "InitializeComponent()". However, "InitializeComponent()" later calls "ComponentResourceManager.ApplyResources()" which (to my great surprise) fires my event (which my handler then chokes on since it thinks the window is already running). Looking at the call stack, the event was fired while initializing the header text on one of my "DataGridView" columns (from the resource file). I'm not sure if this particular event should even apply in this situation but in any case, the form hasn't even been created yet. Is it therefore normal for some form-based events to be fired while the constructor is still running. If so then it's potentially dangerous to define events using the forms designer so we should presumably add them ourselves in "OnLoad()" typically (or otherwise design all handlers to check that the window has actually been created which is ugly IMO). Can anyone elaborate on this situation. Thanks. Tag: Data grid hierarchal navigation Tag: 108085
  - 8
    - DataGridViewComboBox selectively hide arrow I have a column on my DataGridView that is of the type DataGridViewComboBoxColumn. On some of my rows, I want to keep the user from changing the value in that field. What I'm doing now is, as soon as I populate my rows, I run through each row something like this: private: System::Windows::Forms::DataGridView^ Fields; ... #define COMBO_COL 3 for (int i = 0; i < Fields->RowCount; ++i) { if (it shouldn't be changed) { Fields->Rows[i]->Cells[COMBO_COL]->ReadOnly = true; } } That works, but it both looks ugly and doesn't give the user a clue about why the combo box's arrow doesn't do anything. Ideally, what I'd like to do is hide the arrow altogether for those rows. Does anyone have any ideas about how to do that? One thought is that I could change the cell type on the fly to a regular edit cell. I'm not sure how to do that, or if that would just confuse the control altogether. Tag: Data grid hierarchal navigation Tag: 108077
  - 9
    - Drag-n-Drop to Folder or Desktop I have a form that displays a list of bitmaps. I have read the MSDN docs regarding drag-n-drop operations, and have reviewed some examples online on how to do this, but the examples I have seen thus far only show how to create an internet shortcut file. When the user drags an image from the form to the desktop, I would like to either save the image using a default filename (if possible) or show the Save As dialog so the user can enter a name for the file themselves. So, the form with my images (which are in-memory bitmaps and are not stored on the file system) needs to be able to have the images dragged from the ListView control (which are ListViewItem's of course) and dropped onto a specified folder or the desktop (actual folder or desktop, not part of my app)... Thanks, Mythran Tag: Data grid hierarchal navigation Tag: 108063
  - 10
    - Help. Getting exception when I rebind grid to another dataset and change column names Hi, I am using a datagrid and two dataset with different data. Both views of the grid contains 5 columns. I toggle between two different views of the grid which display different types of data. When I toggle, I change the last 3 columns to different name and bind a different dataset. When I startup the application, the first dataset when I click on any empty cells, it works find. However, when I switch for the first time to the alternative dataset and change the name, it will throw an exception Index was out of range. Must be non-negative and less than th esize of the collection. Parameter name: index When I keep the column names the same between the two grid views, it works fine. However, I need to change the column names to indentify the column type of data. Any help is appreciated. Tag: Data grid hierarchal navigation Tag: 108062
  - 11
    - Generating a modal form from a MDI child form I am trying to display a simple modal form from a button on a displayed MDI child form toolstrip. Does anyone have some simple sample code example to send me. Will be much appreciated. Tag: Data grid hierarchal navigation Tag: 108058
  - 12
    - hiding public methods in the DropdownList. hi guys! again with some interesting Question. i've some public methods in class. i dont want to show this methods in the dropdown list while you are typing the code in .net IDE (it long story that why i dont need those methods in the list). i guess there are some arrtibutes those can prevent showing method in the popuped dropdown list but as i dont have much idea about this attributes, i need your expert help on this. please let me know if you know how can i do this or may be some other resource that can help me to find out the way of doing. thanks, Lucky Tag: Data grid hierarchal navigation Tag: 108042
  - 13
    - WebBrowser in UserControl in IE HTML Hi, I built a Windows Control Library that includes the WebBrowser component. It runs fine in Windows Apps or the TestContainer. When I embed it into a web Page as <object> it displays only the outline. When I delete the WebBrowser from the UserControl it runs fine. All IE security settings are set to minimum. Do you know about security restrictions related to "component in component in IE"? thanks marc Tag: Data grid hierarchal navigation Tag: 108041
  - 14
    - TreeView & WM_PAINT I'm curious, given the below code, where does .NET perform the drawing of the treeview? I'm especailly interested in how a TreeNode is painted on the screen with a checkbox in front of it. And yes, I'm fully aware of the TreeViewDrawMode.OwnerDrawText and base.SetStyle(ControlStyles.UserPaint, true); options. class TreeViewE : System.Windows.Forms.TreeView { public TreeViewE() { this.DrawMode = TreeViewDrawMode.Normal; } } By using .NET Reflector on System.Windows.Forms.dll I have debugged the issue at bit. It seems the TreeView::WndProc does not handle WM_PAINT message and send it to the base class. The Control::WndProc forwards the WM_PAINT message to WmPaint. Here is where I get a bit lost. The method is pasted in below but its difficult to follow it, especially with "Native" methods being called. I'm assuming at some stage the Graphics object needs to be used to draw text, checkbox etc. private void WmPaint(ref Message m) { if (this.DoubleBuffered || (this.GetStyle(ControlStyles.AllPaintingInWmPaint) && this.DoubleBufferingEnabled)) { IntPtr ptr1; Rectangle rectangle1; NativeMethods.PAINTSTRUCT paintstruct1 = new NativeMethods.PAINTSTRUCT(); bool flag2 = false; if (m.WParam == IntPtr.Zero) { ptr1 = UnsafeNativeMethods.BeginPaint(new HandleRef(this, this.Handle), out paintstruct1); rectangle1 = new Rectangle(paintstruct1.rcPaint_left, paintstruct1.rcPaint_top, paintstruct1.rcPaint_right - paintstruct1.rcPaint_left, paintstruct1.rcPaint_bottom - paintstruct1.rcPaint_top); flag2 = true; } else { ptr1 = m.WParam; rectangle1 = this.ClientRectangle; } IntPtr ptr2 = Control.SetUpPalette(ptr1, false, false); try { if ((rectangle1.Width > 0) && (rectangle1.Height > 0)) { Rectangle rectangle2 = this.ClientRectangle; using (BufferedGraphics graphics1 = this.BufferContext.Allocate(ptr1, rectangle2)) { Graphics graphics2 = graphics1.Graphics; graphics2.SetClip(rectangle1); GraphicsState state1 = graphics2.Save(); using (PaintEventArgs args1 = new PaintEventArgs(graphics2, rectangle1)) { this.PaintWithErrorHandling(args1, 1, false); graphics2.Restore(state1); this.PaintWithErrorHandling(args1, 2, false); graphics1.Render(); } } } } finally { if (ptr2 != IntPtr.Zero) { SafeNativeMethods.SelectPalette(new HandleRef(null, ptr1), new HandleRef(null, ptr2), 0); } } if (flag2) { UnsafeNativeMethods.EndPaint(new HandleRef(this, this.Handle), ref paintstruct1); } } else { if (m.WParam == IntPtr.Zero) { NativeMethods.PAINTSTRUCT paintstruct2 = new NativeMethods.PAINTSTRUCT(); IntPtr ptr3 = this.Handle; IntPtr ptr4 = UnsafeNativeMethods.BeginPaint(new HandleRef(this, ptr3), out paintstruct2); IntPtr ptr5 = Control.SetUpPalette(ptr4, false, false); try { PaintEventArgs args2 = new PaintEventArgs(ptr4, new Rectangle(paintstruct2.rcPaint_left, paintstruct2.rcPaint_top, paintstruct2.rcPaint_right - paintstruct2.rcPaint_left, paintstruct2.rcPaint_bottom - paintstruct2.rcPaint_top)); try { if (this.GetStyle(ControlStyles.AllPaintingInWmPaint)) { this.PaintWithErrorHandling(args2, 1, false); args2.ResetGraphics(); } this.PaintWithErrorHandling(args2, 2, false); return; } finally { args2.Dispose(); if (!this.IsDisposed && this.IsHandleCreated) { ptr3 = this.Handle; } UnsafeNativeMethods.EndPaint(new HandleRef(this, ptr3), ref paintstruct2); } return; } finally { if (ptr5 != IntPtr.Zero) { SafeNativeMethods.SelectPalette(new HandleRef(null, ptr4), new HandleRef(null, ptr5), 0); } } } PaintEventArgs args3 = new PaintEventArgs(m.WParam, this.ClientRectangle); this.PaintWithErrorHandling(args3, 2, true); } } Appreciate any input Tag: Data grid hierarchal navigation Tag: 108036
  - 15
    - Question Regarding Multiple Resource File.. Hello, I have a product which is customized for multiple vendors for eg:- cisco,hitachi,sony etc. When user installs the app on a cisco vendor all the icons,bitmaps, strings should be cisco and viceversa. What's the best way to achieve this. I was thinking about the same concept of satellite assembly for multiple cultures. So based on the installation it will pick the correct resource file from the installation folder. Is this method feasible?, or do we have any other better methods. Also i will not be putting any resource in the main app. Dot .net Gurus Please advice me. Thanks, Vineeth Tag: Data grid hierarchal navigation Tag: 108033
  - 16
    - Default icon for custom file using C# I have been trying to get a solution to this problem for quite sometime now. I produce custom files in my Windows Application (binary serialization of some objects) with some extention, say "file.abc" Now I want a default icon to be assigned to this file (like in Office, the Excel/Word/etc. icon is assigned to appropriate extentions); so that when somebody double clicks on the file, my application is started with this file as a parameter, which I catch in Main(). Is there any elegant way of doing this in C# - maybe some setting I have to include when created the Setup for the application, or maybe some API I have to use in C# when creating this file. Thanks in advance. - Maneesh Tag: Data grid hierarchal navigation Tag: 108031
  - 17
    - Title bar of Windows form is stuck in resize state when x coordinates and top y coordinate of form are negative Hello, I think I found a bug in the Windows forms engine related to multiple monitors and I wonder if anyone saw that too. If yes, any workaround? Steps to reproduce: 1. connect two monitors to your PC, extend your desktop to both monitors 2. In the monitor settings dialog, drag monitor 2 so that it is to the left of monitor 1. This makes x screen coordinates of monitor 2 negative. Also make sure monitor 2 extends above monitor 1, so that top y coordinate is negative as well. This happens to be my default setup, I have a larger monitor to the left of my laptop screen. 3. Open a sizeable modal dialog in a dotnet 1.1 Windows forms application. 4. Click and hold the left mouse button on the title bar of the dialog, move it to monitor 2. 5. Now release the mouse. 6. Move the mouse over the title bar area, notice what happens. What I see: - If the window is on the left screen and its top is above the top border of monitor 1, mouse cursor is always NW-SE resize cursor over the title bar unless the dialog is maximized. If the title bar is partially above the y=0 coordinate, the strange behavior is only apparent for the part where y is negative. - it is no longer possible to move the dialog by dragging the title bar. Attempting to do so resizes the window rather than moving it - it is not possible to use the [x] button to close the window unless it is maximized - normal behavior will only resume after you manage to move the window back to monitor 1 by resizing it. This will not be possible at all unless the "show in taskbar" property of the Window is set and maximize is allowed. Tag: Data grid hierarchal navigation Tag: 107997
  - 18
    - OS DateTime Format Setting Is there a way to determine the OS's date/time culture format (e.g. mm/dd/yyy vs. dd/mm/yyy) setting at run time? TIA Brad Tag: Data grid hierarchal navigation Tag: 107990
  - 19
    - NumericUpDown control crashes We encounter a bug in winform application in .net 2.0 that often when we press continually on a NumericUpDown control the application crash with the following exception : System.NullReferenceException occurred Message="Object reference not set to an instance of an object." Source="System.Windows.Forms" StackTrace: at System.Windows.Forms.UpDownBase.UpDownButtons.TimerHandler(Object source, EventArgs args) at System.Windows.Forms.Timer.OnTick(EventArgs e) at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(Form mainForm) Tag: Data grid hierarchal navigation Tag: 107981
  - 20
    - Form's - Border Color Hi, How can I change form's border color? Or is there any method to hide/show form's border at runtime. Either one will work for me. Ex: If user wants to keep background green, border also should change to green color. Best % V Tag: Data grid hierarchal navigation Tag: 107980
  - 21
    - ???Dispose dynamic menu items Hi People I have a WinForm program. The UI contains a ToolStripDropdownButton, which is associate a list of menu items of ToolStripMenuItem, created dynamically. Upon different scenarios of user operations, the DropdowButton need to clean up all its menuitems, and create new ones. Here the codes: //////////////////// Void CreateForEmail() { ... button.DropDownItems.Clear(); ... button.DropDownItems.Add("To:", null, HandleOutlookToClick); button.DropDownItems.Add("CC:", null, HandleOutlookCCClick); } Void CreateForPhone() { ... button.DropDownItems.Clear(); ... button.DropDownItems.Add("Phone", null, HandlePhoneClick); } Void CreateForNone() { button.DropDownItems.Clear(); } //////////////////////// So far so good, just work as I expect. Later on, I found out that " button.DropDownItems.Clear();" does not dispose the menu items at all, when I decided to add shortcutkeys to menu items. The above codes were changed in order to have shortCutKeys: //////////////////// Void CreateForEmail() { ... button.DropDownItems.Clear(); ... button.DropDownItems.Add("To:", null, HandleOutlookToClick) .ShortcutKeys = Keys.F9;; button.DropDownItems.Add("CC:", null, HandleOutlookCCClick); } Void CreateForPhone() { ... button.DropDownItems.Clear(); ... button.DropDownItems.Add("Phone", null, HandlePhoneClick) .ShortcutKeys = Keys.F9;; } Void CreateForNone() { button.DropDownItems.Clear(); } //////////////////////// After CreateForNone is called, and I press F9, either HandleOutlookToClick or HandlePhoneClick will be called, depending which one was last called. Obviously, those menu items are still in the program accepting keyboard shortcut, though they are not invisible. So I replace "button.DropDownItems.Clear();" with the following //////////////// private void ClearButtonDropdown() { for (int i = Button.DropDownItems.Count - 1; i >= 0; i--) { ToolStripMenuItem m = Button.DropDownItems[i] as ToolStripMenuItem; Button.DropDownItems.Remove(m); m.Dispose(); } Button.DropDownItems.Clear(); // even GC.Collect() will not have effect. } /////////////// However, strange things remain the same. Obviously someone is still holding references to those menu items, stopping GC from disposing those items. Can you point out how to dispose these menu items? Cheers Andy Tag: Data grid hierarchal navigation Tag: 107973
  - 22
    - C# - Printing a form with scrollable controls HI, I have an app that has a form with scrollable controls. So, I cannot make a bitmap from the printscreen and print it since all the content and controls are not visible at the same time. Is there a way in C# to print such a form - printing the whole content? Thanks, Avanti Tag: Data grid hierarchal navigation Tag: 107968
  - 23
    - Why does 28.08 show up as 28.080000000000002 in DataGridView I'm baffled. I have a column in a SQL Server Express database called "Longitude," which is a float. When I view the table in a DataGridView, some of the numbers, which only have two decimal places in the database show up with *15* decimal places and are ever so slightly off (in the example in the subject line, by about 2E-15). I'm not doing any operations on this column. It's just running a stored procedure which performs a pretty basic SELECT on the table. If I run the stored procedure in Management Studio Express, all numbers show up fine (just two decimal places). What's going on here? Thanks, -Dan Tag: Data grid hierarchal navigation Tag: 107950
  - 24
    - Deactivate F10 in MDI Windows Form Application Hello Friends, I have a windows form application it is a mdi form, and have a menustrip. When press F10 Key, it activate the menustrip. But I want F10 key show a form with information about the application. How do i deactivate the menustrip when press F10 key? Thanks for your answers P.D. I am peruvian, i dot know english languague, most spanish :) Raul Mercado Lima - Peru Tag: Data grid hierarchal navigation Tag: 107949
  - 25
    - Why does 28.08 show up as 28.080000000000002 in DataGridView I'm baffled. I have a column in a SQL Server Express database called "Longitude," which is a float. When I view the table in a DataGridView, some of the numbers, which only have two decimal places in the database show up with *15* decimal places and are ever so slightly off (in the example in the subject line, by about 2E-15). I'm not doing any operations on this column. It's just running a stored procedure which performs a pretty basic SELECT on the table. If I run the stored procedure in Management Studio Express, all numbers show up fine (just two decimal places). What's going on here? Thanks, -Dan Tag: Data grid hierarchal navigation Tag: 107945

I have hierarchal data grid that has parent and child tables linked via
data relation. I would want the child row to be displayed with out
having to click on the relation link the windows forms grid within the
same grid. How can I achieve this?

Thanks

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