Control Validating Event Odd Behavior

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  - 1
    - Calling .NET using COM I have a C# Windows Application that was built using an XML-based framework (It's fairly complex, but simplifies our development considerably.) We have recently integrated this application with a COBOL application, in that the COBOL application will call our .NET forms. I have discovered a few issues with this, and hope someone may be able to help in fixing them. Most of the problems seem to revolve around the Windows MessageLoop, threading and some third-party components (namely, Janus GridEx and Infragistics Toolbars). (I posted to their news forums, but have not had any luck there.) I think the problem may be more in how I am creating and using the thread. I have the code here that is used when a form is called from the COBOL application. One thing I have noticed is that if I call the form using System.Windows.Forms.Application.Run(_child) , the form works perfectly, but the user cannot do anything in the COBOL application - it's "frozen" until I close the .NET form. If I use the following code to call the form, the user can do stuff in the COBOL application, but the Tab, ESC, Alt, etc. keys do not function as expected on the third-party components, which may do something of their own with the keys. For example, the Janus Grid should Tab from column to column, but does not. Instead, it will tab from control to control. I have tried looking at various properties of the thread the form is on, the ApplicationContext, the Application, etc, but nothing seems to be different from one call to the next, except for the thread's ID. Any help would be greatly appreciated!! The code to create the thread is: _applicationcontext = new System.Windows.Forms.ApplicationContext(_child); ThreadStart _threadstart = new ThreadStart(this.StartMessageLoop); Thread _thread = new Thread(_threadstart); _thread.IsBackground = true; _thread.ApartmentState = ApartmentState.STA; _thread.Start(); Where _child is the form with the grid, and StartMessageLoop is: private void StartMessageLoop(){ Application.Run(_applicationcontext); } Tag: Control Validating Event Odd Behavior Tag: 84100
  - 2
    - Winform with DirectX Video-Directshow Use I need to grab a video frame on a winforms app. The Microsoft oldway was with Direct Show filter as detailed in Microsoft DirectX 9.0 SDK Update (October 2004) GrabBitmaps Sample This C++ console application shows how to use the Sample Grabber filter to capture frames from a video file. What is the new way/right way to do this now? Am I suppose to use managed direct-x which supports the directshow filter? I need to do this in CSharp so are there special using statements that I need to access the direct show features of managed direct-x. Help anyone I am so confused about this. Thanks Tag: Control Validating Event Odd Behavior Tag: 84098
  - 3
    - Problem with Opacity and Clipping on a textbox I have a derived textbox which draws an XP border around the control by catching the WM_NCPAINT message. The control works fine until the Opacity of the form is set to something other than 0. Setting the opacity to anything other than 1 causes all sorts of problems. For example, the DC returned by GetWindowDC is not aligned with the actual location of the window so the window is drawn in an incorrect location (it's offest by the width and height of the NC border), the drawing area in the DC is the wrong size so I cannot paint the entire NC area, the client area is not correctly positioned and the mouse hit testing is incorrect. In general things are a mess when opacity is set to anything other than 1. Any thoughts or comments? andrew using System; using System.Drawing; using System.Windows.Forms; using System.Runtime.InteropServices; using Barcap.GSL.Windows.Forms.Utils; namespace XpWindows.Forms.Controls { /// <summary> /// Represents a Windows XP style capable TextBox control. Displays in XP style if the /// AppController.Current.FormProperties.XPThemeStyle is set to other than "None". /// </summary> [ToolboxBitmap(typeof(XPTextBox),"Resources.XPTextBox.bmp")] public class XPTextBox : System.Windows.Forms.TextBox { #region Private Variables private bool _enableXPStyles = (AppController.Current.FormProperties.XPThemeStyle != XPThemeStyle.None); #endregion Private Variables #region Constructor /// <summary> /// Initializes a new instance of the XPTextBox class. /// </summary> public XPTextBox() : base() { } #endregion Constructor #region Protected Methods /// <summary> /// Expose whether XP styles should be used for rendering this control (derived from the app controller). /// </summary> protected bool EnableXPStyles { get { return _enableXPStyles; } } /// <summary> /// Override the paint message if XP styles are enabled. /// </summary> /// <param name="m">Windows message</param> protected override void WndProc(ref Message m) { const int WM_NCPAINT = 0x0085; // Base class implementation has to be called no matter what // because the scroll bars of multiline textboxes are drawn // in WM_NCPAINT base.WndProc(ref m); if ( _enableXPStyles ) { if (m.Msg == WM_NCPAINT) { using(Graphics gr = Graphics.FromHdc(Win32UI.GetWindowDC(this.Handle))) { // Draws a blue border around the textbox _DrawBorder(gr, 0, 0, this.Width - 1, this.Height - 1); // Draws over the textbox border using the textbox backcolor _DrawInnerBorder(gr); } } } } #endregion Protected Methods #region Private Methods /// <summary> /// Draw a rectangle border. /// </summary> /// <param name="g">The System.Drawing.Graphics object to be used to draw the rectangle.</param> /// <param name="x"></param> /// <param name="y"></param> /// <param name="width"></param> /// <param name="height"></param> private void _DrawBorder(Graphics g, int x, int y, int width, int height) { g.DrawRectangle(new Pen(XpBorderColor, 0), x, y, width, height); } /// <summary> /// Draws the inner border of the textbox control if XP style is enabled. /// </summary> /// <param name="g">The System.Drawing.Graphics object to be used to paint the inner border of the control.</param> private void _DrawInnerBorder(Graphics g) { using (Pen pen = new Pen(this.BackColor, 0)) { g.DrawRectangle(pen, 1, 1, this.Width - 3, this.Height - 3); } } #endregion Private Methods } } Tag: Control Validating Event Odd Behavior Tag: 84097
  - 4
    - Possible bug using non system fonts Hi there. I've for the past few days been experimenting with the use of non system fonts via the PrivateFontCollection.AddFontFile() method. If i do something like this: private void button1_Click(object sender, System.EventArgs e) { System.Drawing.Text.PrivateFontCollection pfc = new System.Drawing.Text.PrivateFontCollection(); pfc.AddFontFile("FREE3OF9.TTF"); FontFamily fam = new FontFamily("Free 3 of 9", pfc); Font f = new Font(fam, 10F); this.listBox1.Items.Add(f); } and clicks the button about 5 times or so, the font objects get messed up and thrwos an exception in, among others, the name property. Any suggestions? Tag: Control Validating Event Odd Behavior Tag: 84095
  - 5
    - The private components field: where is used? Hi there Every time I create a new Form in the VS 2003 IDE i see the following entry private System.ComponentModel.Container components = null; which constantly remains null, when I add controls (say a Button) or components (say Timer) on the Form. The protected Dispose() checks if (components != null) which always returns false. Questions: 1. Where and when that private "components" field is used? 2. If it is always null a. can I delete it safely? b. why I don't see any compiler warning? Also, that same declaration private System.ComponentModel.Container components = null; is done by the IDE when I create a new Component or CustomControl file. But I don't intend to use it. Do I really need it? Best regards Theo ------------------------ Theo Bebekis Thessaloniki, Greece ------------------------ Tag: Control Validating Event Odd Behavior Tag: 84094
  - 6
    - Winforms design with class in nested namespaces hi i am working on a gui for a bigger project using managed c++ and wanted to put it in the namespace hierachy under cubes::gui so i did this in my form.h namespace cubes{ namespace gui{ public class [...] }} but now the design view does not work... it only does with ony one given namespace like ... namespace gui{ public class [...] } how do i make my forms live in cubes::gui and still be able to use the form designer? regards Florian Demmer Tag: Control Validating Event Odd Behavior Tag: 84092
  - 7
    - Capturing user interaction Hello NG, in my MDI-App, I'd like to checkfor how long the User hasn't done anything (moved the mouse, pressed a key) so that I can do some stuff after a given amount of idle time. My first idea was to save the current time in a variable every time the user moves the mouse or presses a key so that i can use that variable to calculate idle time. I ran into a problem at the very start though. The MouseMove Event of my MDI parent form is never fired. Is that standard behaviour for MDI containers? What would be an elegant way to capture the point in time of the last user interaction? Tag: Control Validating Event Odd Behavior Tag: 84088
  - 8
    - Beginners Question Form Sizing Hi I am writing my first .DotNet application out of the Wrox Professional 2003 Book. I would like to ascertain the screen size in use and size my forms accordingly but that topic does not come up in the relevant chapter on forms How do I get at the relevant computer environment information to size the MDI form Roger Stenson Tag: Control Validating Event Odd Behavior Tag: 84087
  - 9
    - Monitoring MouseMove anywhere within the screen. Is it possible to track a general "MouseMove" event that monitors mouse movement anywhere within the screen, not just within a the scope of a Control? I'm writing logic that resizes a form on mouse move, but I'm finding that when the mouse falls out of the size of the control/form I lose the MouseMove event, and the resize operation ends. Hope that makes sense. Cheers everyone! ==== Phil Tag: Control Validating Event Odd Behavior Tag: 84085
  - 10
    - I have to re-build project to see changes at run time I have one project that must be rebuilt instead of just built in order for changes to be seen. This is the startup project. I am running in debug mode, and the project is checked to build in this configuration thru config mgr. what am i missing? Tag: Control Validating Event Odd Behavior Tag: 84076
  - 11
    - Strange combobox focus/selectedtext issue Hi, I have a MDI app with a child form that has tab pages. In the main (first) tab page, there is a panel, on this panel, there are a few text boxes and one readonly combobox. The controls on this form are bound to a datatable in a dataset. When this form loads initially, the main (first) tab is shown and the readonly combobox's text is selected. It shouldn't be, and I can't figure out how to deselect it. If I click the the second tab page and then come back to the main (first) tab page, the combobox's text is no longer selected. Any idea how to prevent this or wprk around it? Thanks, Josh Tag: Control Validating Event Odd Behavior Tag: 84073
  - 12
    - listview scrollbar range not correct I implemented a double buffered listview to eliminate flicker. I set the following styles, then overrode OnPaint and did the drawing. Everything looks great! However, if I change the font from default, the column headers are not drawn with the new font and worse yet the scrollbar doesn't know that font height has changed and I can never scroll to see the last few items on the list. Short of adding my own scrollbar, is there a way to let the column headers and scrollbar know about the new "range" when the font is changed? SetStyle(ControlStyles.DoubleBuffer, true); SetStyle(ControlStyles.UserPaint, true); SetStyle(ControlStyles.AllPaintingInWmPaint , true); Tag: Control Validating Event Odd Behavior Tag: 84064
  - 13
    - How to access RadioButton's round cycle/dot graphics? What I am trying to do is to change the round button background to grey and still keep the text label black, by overriding the "Enabled" property. The purpose is to keep the radio button reader-friendly while keep it non-editible. Somemhow I didn't find any property exposed to change the button's background color. Well, there IS a backcolor property but the color applies to the whole button area including the text area. I want to change the little round-dot button only. Thanks strout Tag: Control Validating Event Odd Behavior Tag: 84062
  - 14
    - Microsoft: Help with OLE documents... Hi all. I have an application to draw and design different documents, that supports linking and embedding of other documents (like, for instance, Corel Draw or Word). Then, the user can print their designs "WYSIWYG", so I load the external document inside an OLE document container control (VB6), get a handle to the object and invoke OleDraw with the hDC that I want the object in. This have been working excellent, and this application is largely distributed among our clients. The problem is we want to migrate to .NET (any language, VB, C#, C++, ...), but there's no OLE container that lets me obtain a handle to an OLE document. I know you could import COM and ActiveX, but this particular control (included in VB6) CANNOT BE IMPORTED NOR INSERTED in .Net. Microsoft calls this a "migration issue" and warns us about it, but how, then, can I draw an Ole document inside our application (let alone open, edit, update, etc)? Is Microsoft planning to update this component for VS.Net 2005? Or is there an alternative? I know I could load an OLE document "the hard way", but those are methods so obscure, I get lost before even starting to insert the document in a container... If this is the only solution, is there an easy (as easy as this can be) example that can lead me to accomplish the insertion of a document inside mine? I know it can be done, because RTF editor lets you do it. It even lets you open and edit the document, and "paste special", but I don't seem to accomplish getting a handle to any of those inserted objects... Thank you for your time, VBen. Tag: Control Validating Event Odd Behavior Tag: 84059
  - 15
    - Form as a control? Hi, Is there a way to have a form as a control? Here's what I want to do: I have a datagrid which displays various information. However, I want to use it in multiple locations within the same application. Instead of creating an instance of the grid and linking up the same data on each form, I want to have a "floating" form which contains my grid in my application. When a new form needs this grid, I would, say, take the form (with the grid) and add it to a panel as a child control ... does this work? Is this even a good approach? Any examples? Thanks in advance, Chris Tag: Control Validating Event Odd Behavior Tag: 84058
  - 16
    - App.config Problem when launched from IIS not locally I have an application that when launched under Windows XP, from an IIS web server, will not read values from the app.config file. I have looked at the IL code and attempted to reconstruct what AppSettings["key"] does. I can create a webclient and download the app.config file and can even display it in my application. However the AppSettings["key"] approach yeilds a null value. It is not a security problem on the web server (at least that I can see), I can download the app.config file using IE, or through code. If I run the application from my local machine this problem does not happen Furthurmore I have disabled DotNet security by using [caspol -s off] so I can't see any security problems. Please help. This is a very important application for our organiztion. Tag: Control Validating Event Odd Behavior Tag: 84057
  - 17
    - adding items to listbox with extra data similar to databinding to dataview since you can't change items in a listbox that is databound, i have to add & remove items using its items collection. The thing about this is that with databinding, each item in the list can hold all the info for a particular datarowview and can be accessed by converting the list item back to this object. The real thing i need to do is be able to have the list item's text displayed correctly, then behind the scenes, i need to be able to access an ID field from the data record associated with the item so that i can then do an update to the db with the selected items of the list. How do i save this extra data without databinding? thanks Tag: Control Validating Event Odd Behavior Tag: 84053
  - 18
    - Button images I'm relatively new to programming in C#, so I'm probably missing something obivous. I've got several buttons on a form that I assign an image to when the user clicks each button. That works fine. If the user clicks the button again, I want to remove the image and just display the text in the button's Text property. How can I remove the image from the button? Thanks for any help. Mike Tag: Control Validating Event Odd Behavior Tag: 84052
  - 19
    - BIg Problem Hi, Hi testing the Visual Studio 2005 Beta 2, i'm developed one application and save this project, when close the visual studio and reopen in another time with the application i produce this error OBJECT REFERENCE NOT SET TO AN INSTANCE OF AND OBJECT LINE 0 COLUMN 0 And not is possible open the project Thanks in advance Euclides Tag: Control Validating Event Odd Behavior Tag: 84047
  - 20
    - Config problem: appSettings not found by other dll's I am running a wizard style application which uses other assemblies. One of these assemblies uses an appSettings section for configuration. My understanding is that the configuration systems uses a config file named after the hosting process executable? However, this isn't being picked up from this file.. Does anyone have any suggestions as to how to solve this one? Dirc Tag: Control Validating Event Odd Behavior Tag: 84046
  - 21
    - checkbox column in datagrid - event handling I have a datagrid with a checkbox column. How can I make a messagebox appear if a cell with the checkbox gets checked or unchecked? thank you in advance. Tag: Control Validating Event Odd Behavior Tag: 84042
  - 22
    - Changing DataViewManager.RowFilter has no effect On Feb 12 I posted a request for some help with the subject "Changing the DataViewManager.RowFilter has no effect". I attached some sample code written against Northwind demonstrating the problem. I may not have been logged in with my MSDN Email account so I am reposting my request under that account in the hopes that someone can take a quick look and point out the error of my ways. Thanks Tag: Control Validating Event Odd Behavior Tag: 84040
  - 23
    - "Autohide menu bar" in Media Player I want to add the "Autohide menu bar" feature to my form like the Windows media player. (Menu bar is shown only when the mouse is over the non-client area. i.e. title bar, menu bar) However, seems the MouseMoved event is fired only when the mouse is moved over the visible area. Anyone knows how can i get informed when the mouse is moved over the invisible non-client area? Thanks! -- Regards, Hin Tag: Control Validating Event Odd Behavior Tag: 84039
  - 24
    - Vertical scrolling for windowsforms in c# hi all, i need to create vertical scrollbar dynamically for the controls that are created dynamically in the form. (i'm not adding any controls to the panel). when the form exceeds(coz of dynamic controls creation) the default system coordinates, vertical scroll bar should be dynamically produced in the form. in this case i could produce the vscrollbar dynamically. but when i'm scrolling the form,the controls which are down couldn't be scrolled up. i'm doing it in this way, if(height >= 600) { vsb=new VScrollBar(); vsb.Dock=DockStyle.Right; vsb.Maximum = 600; vsb.LargeChange = 250; vsb.ValueChanged +=new EventHandler(vsb_ValueChanged); Controls.Add(vsb); } ... ... ... private void vsb_ValueChanged(object sender, EventArgs e) { this.Top = -vsb.Value; } any suggestion in this regard would be greatly appreciated. Thanks and Regards chris Tag: Control Validating Event Odd Behavior Tag: 84036
  - 25
    - [ANN] February 15, 2005, "Debugging Visual Basic .NET Applications" chat Join members of the Visual Basic .NET and Debugging teams (Deeptanshu Verma, Jay Schmelzer, Lisa Feigenbaum, Bill Horst, Scott Nonnenberg, and Rekha Cuppala) to discuss debugging Visual Basic .NET applications with the Visual Studio .NET Debugger. Almost every program will need to be debugged sometime, so take this opportunity to chat with the experts about debugging. Date: February 15, 2005 1:00 - 2:00 P.M. Pacific time 4:00 - 5:00 P.M. Eastern time 21:00 - 22:00 GMT (For a list of the start time in several local time zones, please see http://www.timeanddate.com/worldclock/fixedtime.html?month=11&day=2&hour=13&min=0&sec=0&p1=234) Outlook Reminder: http://msdn.microsoft.com/chats/outlook_reminders/05_Feb15_DBUG_VBNET.ics Location (click the name of the chat to enter the chat room) http://msdn.microsoft.com/chats For more information about Visual Basic .NET, see http://msdn.microsoft.com/vbasic/ To see a list of upcoming chats or set a reminder for this chat, see http://msdn.microsoft.com/chats. For archives of previous chats, see http://msdn.microsoft.com/chats/recent.asp. Thanks! Jason Cooke Visual Basic Team ======== This posting is provided "AS IS" with no warranties, and confers no rights. You assume all risk for your use. (c) 2005 Microsoft Corporation. All rights reserved. Tag: Control Validating Event Odd Behavior Tag: 84033
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  - 1
    - label.visible does not work I'm developing a quite comlex form containing a user control in C# In the user control I'm trying to set a simple label to be visible: labelState.Visible = true; The debugger showns me, that the labelState.Visible is false before entering this line of code. But it is still false after this line of code!!! Can anyone please explain, how this can happen? I have double checked that I have not defined an event on this label that resets the value to false. Is there any posiible condition that does not allow to set a label's visibility to true? Regards Burkhard Mahr ------------------------- Label Initialization Code: this.labelState.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right))); this.labelState.BackColor = System.Drawing.Color.Transparent; this.labelState.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.labelState.Location = new System.Drawing.Point(870, 4); this.labelState.Name = "labelState"; this.labelState.Size = new System.Drawing.Size(44, 16); this.labelState.TabIndex = 16; this.labelState.Text = "Status"; Tag: Control Validating Event Odd Behavior Tag: 84027
  - 2
    - How to create an click event in a form automatic(C#) Hello Now i have try create an click event in a form,so i doubleclick the form,but the IDE create an form_load event automatic: private void Form2_Load(object sender, System.EventArgs e) { } but the code i need is: private void Form2_Click(object sender, System.EventArgs e) { } so i had write it by hand,but it not work,i find some books,and add some codes: this.Click += new System.EventHandler(this.Form2_Click); Haha,it work,but how can IDE create an click event automatic,not with handwrite? Tag: Control Validating Event Odd Behavior Tag: 84023
  - 3
    - I cannot call XmlDataDocument.load second time. Hi All, I have this xml file and loaded it by XmlDataDocument.load function. But after XmlDataDocument.load function called, I need to load another xml file into XmlDataDocument again. I want to clear existing data in XmlDataDocument and I want to load new data into that XmlDataDocument . I cannot call XmlDataDocument.load second time. Will somebody please recommand how to clear existing data and load again? Any suggestion is appreciated. Thanks Tag: Control Validating Event Odd Behavior Tag: 84022
  - 4
    - format grid cell On my grid i'm defining what data to show, colors, etc. Now, I have one column were i need to show the time instead of seconds, I have the code to convert time to seconds, but how can I get that into my grid? i have sub GridFormat() Tag: Control Validating Event Odd Behavior Tag: 84019
  - 5
    - Microsoft.Office.Interop.Excel Hi, how can I check if an Excel process is already open? To open an Excel process I use this code: Excel.Application _mExcelApp = new Excel.Application(); Please help me, thank you ;) Tag: Control Validating Event Odd Behavior Tag: 84015
  - 6
    - child mdi forms in different threads Hi, I want to open up a number of child forms in my main mdi container form, but I want the processing that will happen in each child to happen in a different thread. I tried something like this: ChildForm childForm = new ChildForm(); shildForm.MdiParent = this; Thread thread = new Thread(new ThreadStart(childForm.Show)); thread.Start(); It workd fine for the first childForm, but the next one doesn't open up. It just hangs. Is this how things are normally done or is there another way? Thanks in advance. Tag: Control Validating Event Odd Behavior Tag: 84014
  - 7
    - ColumnHeader. Is the (Name) a design time property? Or something e Hi, Is it possible to retrieve the (Name) value from ColumnHeader property? I am trying to get the value through PropertyDescriptor / PropertyInfo, override it through new property but it does not seems to work or it is not available to access. How can I actually do that programmatically in design-time? Thanks in advance, Tag: Control Validating Event Odd Behavior Tag: 84008
  - 8
    - Secretion of documentation for Controls hosted in IE ? Hi, I develop .NET control which will host in IE (like applet). I want to set value of <INPUT> from this control. Is it possible. If no, is possible to change something in client-side from this control ? P.S.: I browsed .microsoft.com and also I tried to find something in google.com about .NET controls for IE but I found only very poor samples and almost nothing from Microsoft. Does it mean Microsoft do not documented .NET controls for hosting in IE ??? If you know some links please write me its becuase I cann't find them. Muc thanks. Tag: Control Validating Event Odd Behavior Tag: 84007
  - 9
    - UseMnemonic Hi, does a property UseMnemonic exist for a Button control?? I've created a button with this property: Button.Text = "&Add new record"; Button.Name = "btnMyButton"; The & should allow a easy access with the keyboards... but it doesn't work: with Label is easy thanks to the UseMnemonic property, but how about Button control? Does it exist something similar? Thanks. Tag: Control Validating Event Odd Behavior Tag: 84006
  - 10
    - specified cast is not valid. hi all, I have a windows application which is developed in VB.NET. I have used some bitmaps and set image property of button. Some time I load form programmaticaly.. following error pops up 1) Specified Cast is not valid it is on the following line of code. Me.Button1.Image = CType(resources.GetObject("Button1.Image"), System.Drawing.Bitmap). To sovle this problem I CUT the button and paste it again and save project next time i run it work fine.... What is the problem? Ansari Tag: Control Validating Event Odd Behavior Tag: 84002
  - 11
    - help:how to design panel in visual way without form I have to write some code to change the panel which contained in the forms, but is there anyway just design the panel without putting it in the form.Thanks forward! Tag: Control Validating Event Odd Behavior Tag: 83992
  - 12
    - transfering info between forms in Visual Basic How can i transfer information that user inputs from a textbox in one form to a label in a second form? Tag: Control Validating Event Odd Behavior Tag: 83985
  - 13
    - ListBox, items get corrupted. Hi there I've implemented a modification of the common ListBox control. It's used for displaying a collection of fonts - eigther system fonts or fonts from a custom folder. But somehow, if I'm displaying custom fonts retrieved using the PrivateFontCollection, and I'm resizing the form or overlapping it with some other window - the items get corrupted. (Items are actually just Font-objects). At first it draws perfectly - but after some time resizing the window it crashes throwing the ArgumentException withing the item's (Font object's) name field. I've got no problem at all displaying system fonts. Resizing as wild as possible doesn't make it crash. Any suggestions? Tag: Control Validating Event Odd Behavior Tag: 83983
  - 14
    - PrintDocument and PrivateFontCollection Hi there... I'm writing a tiny utility to display various fonts - system fonts or custom fonts chonsen from some folder. Also I want to give the user the ability to print all the fonts - and that's why I've implemented a print (preview) function. But I've got the following problem: When trying to print and display fonts that aren't installed in the system - it doesn't work. I'm creating a PrivateFontsCollection from all font-files from a custom folder, and then drawing some certain string with each and every font in this collection - but it won't draw using the custom fonts, but automatically switches to "MS Sans Serif" It seems like I'm able to retrieve name, size, etc - but it just wont draw with the correct font face. I've got no problems drawing fonts installed in the system - retrieving them via InstalledFontCollection. That works like a charm. I was having the same problem using a RichTextBox to display the fonts at first - but then I implemented my own ListBox-thingy custom made for my purpose, and that worked fine as well. Can it be that RichTextBox's and the PrintDocument have problems drawing using custom non-system fonts? What can be the problem? Tag: Control Validating Event Odd Behavior Tag: 83982
  - 15
    - DataGrid navigation with custom links Hello everybody, I have a DataGrid bound to a DataSet with one parent and one child table with AllowNavigation set to true. The DataGrid shows the RelationName strings as a link to the sub table, I want to replace them with something more user friendly. For example "Titles of this author" instead of "Titles4Author". How can I do it without renaming the relations? Any help will be appreciated. Stefan Tag: Control Validating Event Odd Behavior Tag: 83980
  - 16
    - Fixing form size in design mode from base form Hi Does anybody know of a way to fix the size of inheriting forms by setting a size in a base form. I would like to remove the ability of developers to change the size of a form (in design mode) if they inherit from a particular base form. I know you can override the SelectionRules property of a control designer to fix a control size but it doesn't seem to work for inheriting forms. Tag: Control Validating Event Odd Behavior Tag: 83976
  - 17
    - WinForms Interaction Hi, I want to have interactions between two forms. A will sample with next lines: 1. The program user has a main window with a Listview control on it 2. The user selects an item from the listview and selects some 'details' option. 3. The program responds showing a child window with details for item selected on the main window. 4. In order the user selects previous/next item without have to close the child window, there are two buttons (up/down) to navigate between items. So my concern is even the child window is the active window the user requires to see which item is selected on the Listview control of the main window, so what I need is to keep highligted the selected item on the main windows without the user select it as the active window. Shuch behaviuor is exactly the same as the Events Viewer Windows OS tool. I will appreciatte your help. -- Message posted via http://www.dotnetmonster.com Tag: Control Validating Event Odd Behavior Tag: 83975
  - 18
    - how to drag drop files? I have a picture box control with an image loaded. I would like to be able drag the image from the picture box into an email or the desktop. Does anyone know how to do this? Using the DoDragDrop with Outlook, i have been able to drag the filename into an email. Is there any way to drag the picture instead? Tag: Control Validating Event Odd Behavior Tag: 83972
  - 19
    - MenuItem and KeyDown Event Hi all, I have a form with a main menu which contains a MenuItem with a shortcut. (Ctrl+C). In the form I have a datagrid that overrides the KeyDown event and if it's the Ctrl+C combination it performes some task. Now it seems that whenever the shortcut of the MenuItem is defined the DataGrid DOESN'T receive the event, but when the shortcust isn't defined in the MenuItem the DataGrid acts well and receives the KeyDown event. Any solutions ? Thanks in advance, Uri Tag: Control Validating Event Odd Behavior Tag: 83969
  - 20
    - ListBox resize problem Hi, Iam new to windows forms so maybe this problem was discussed already (tho I could not find anything on google). I have added and docked to the left a ListBox, now when I resize Form, list box resizes correctly in Width, but in Height it does not change its position smoothly. I mean that bottom size changes its position like it was computed modulo 10 - it looks like it snaps to grid points. I hope this is informative description. Thanks for any help. Martin Tag: Control Validating Event Odd Behavior Tag: 83965
  - 21
    - Mouse capture for custom context or drop-down menus Hello, I'm implementing an undo/redo drop-down menu similar to the undo/redo menus in VS.NET 2003. The idea is that when the drop-down arrow is pressed, a floating ListBox control appears under the pressed button, and disappears when the user chooses an action to undo or clicks anywhere else in the form - meaning that when the ListBox is open, I need to handle every MouseDown event on the form. I tried attaching an event handler to the MouseDown event of the ListBox and then setting ListBox.Capture = true, but unfortunately that didn't do the trick (why I couldn't figure out). Mouse events were raised for every control on the form that handles them, and my ListBox.MouseDown handler was only called when the mouse was over the list box - i.e., capture wasn't working. Next I tried P/invoking SetCapture and ReleaseCapture, but with the same result (unless the mouse button was still pressed, in which case ALL system mouse events were captured - far from ideal). After lots of searching I found a message on this group saying that only in a MouseLeave event handler will Control.Capture = true actually make any difference - that turned out to be true and I finally got capture to work. The only problem was that since the ListBox first appears when the cursor is still on the drop-down button, capture wasn't set until the cursor was moved over and out of the ListBox. I finally solved it by some ugly cursor position fiddling. I (programmatically) move the cursor position over the ListBox and then move it back. I'm sharing this here in case someone gets stuck on a similar problem. Also, if anyone has a better solution I'd love to see it. // Called from the toolbar's ButtonDropDown event handler private void OpenHistoryList(ToolBarButton button) { // Get the entry list associated with this history button HistoryEntryList entryList = (HistoryEntryList) button.Tag; // Add the list to the form ListBox listbox = new ListBox(); this.Controls.Add(listbox); // Retrieve sizes from the configuration file int width = int.Parse(ConfigurationSettings.AppSettings["History.Width"]); int height = int.Parse(ConfigurationSettings.AppSettings["History.Height"]); // Set the list coordinates listbox.Location = new Point(button.Rectangle.X, button.Rectangle.Y + button.Rectangle.Height); listbox.Width = width; listbox.Height = height; // Add the action descriptions to the list foreach(HistoryEntry entry in entryList) { listbox.Items.Add(entry.Description); } listbox.BringToFront(); listbox.Focus(); listbox.MouseDown += new MouseEventHandler(CloseHistoryList); listbox.MouseLeave += new EventHandler(CaptureHistoryList); // Fiddle with mouse position to generate a MouseLeave event automatically Point currentPos = Cursor.Position; Rectangle listCoords = listbox.RectangleToScreen(listbox.ClientRectangle); Cursor.Position = new Point(listCoords.Left+1, listCoords.Top+1); Application.DoEvents(); Cursor.Position = currentPos; } private void CloseHistoryList(object sender, MouseEventArgs e) { // Get the listbox's coordinates ListBox listbox = (ListBox) sender; Rectangle listCoords = listbox.RectangleToScreen(listbox.ClientRectangle); // Check whether the click was within the listbox's bounds if ( e.X < listCoords.X || e.X > listCoords.X + listCoords.Width || e.Y< listCoords.Y || e.Y > listCoords.Y + listCoords.Height ) { // Remove the listbox from the form, release mouse capture and dispose of the listbox this.Controls.Remove(listbox); listbox.Capture = false; listbox.Dispose(); } } private void CaptureHistoryList(object sender, EventArgs e) { ListBox listbox = (ListBox) sender; listbox.Capture = true; } Hope that's useful -Doron Tag: Control Validating Event Odd Behavior Tag: 83964
  - 22
    - Changing DataViewManager.RowFilter has no effect - Sample Northwind Code Attached - Northwind.zip (0/1) Using a strongly typed dataset, a DataGrid and some bound text controls where the user selects a row in the DataGrid and the bound controls display it here is the problem: If I bind the grid and the controls to the tables DefaultView and I change the DefaultView.RowFilter the grid changes as expected. If I bind the grid and the controls to a DataViewManager and I change the RowFilter nothing happens. The attached sample code has a checkbox below the DataGrid that will attempt to filter the Northwind.Customers.Region field for NULLS. There are two forms one that binds using the DataViewManager (NOT WORKING) and the other using the DefaultView (WORKING). I need to use the DataViewManager so if anyone can figure out why this isn't working or point out the error of my ways I would be most appreciative. Phil William and I discussed some of this at length in another post "How do I bind to a DataView instead of a DataTable". Tag: Control Validating Event Odd Behavior Tag: 83962
  - 23
    - Lareg fonts - detect BOTH methods of changing AFAIK, there are two different ways of getting large fonts in Windows: 1. Increasing the DPI setting on your display adapter. Display Settings -> Settings -> Advanced. 2. Scale the fonts in you current display theme (in XP) or scheme (in Win2K). Display Settings -> Appearance From Chris Sell's book and article (http://www.sellsbrothers.com/writing/default.aspx?content=winformsautoscaling.htm) I know that WinForms handles 1. above fine on its own and scales the fonts and controls properly using the AutoScale property. However, what about method 2. above? Changing this setting doesn't seem to fire the DisplaySettingsChanged event and WinForms doesn't scale apart from the text in the window title bar getting bigger. What I would like to do is what VS.NET 2003 does when you change this setting - all of its fonts get bigger. Is there another event maybe or do I need to override WndProc() and look for a particular Windows Message? Is there another way? Thanks in advance, Mike. Tag: Control Validating Event Odd Behavior Tag: 83960
  - 24
    - Winforms Datagrid - detecting SORT I'm trying to find an event that will help me keep a status area updated for the grid row under the cursor. For the most part when a user clicks somewhere in the readonly grid I am responding to the cell change event, and selecting the entire row. A custom paint reverses colors. This works great. Even after sorting, I see how to use the currency manager to find the right dataset record to show status for the right record in a separate area. But when someone uses the built in sort feature, I don't get a change position type event. I've fiddled with mouse-down, and mouse-up, and the sort has not occurred yet. I am always showing stats for the PREVIOUS highlighted record when I click a column heading for auto-sort. My status window is always behind by one. But if the user picks a cell after the sort, then everything is back in synch. So I am looking for an event that I can respond to AFTER the sort has actually happened, that I can update my status area for the new "current row". It doesn't seem to be coming easily. Any hints would be greatly appreciated. Best regards - Lee Gillie, Spokane WA Tag: Control Validating Event Odd Behavior Tag: 83954
  - 25
    - MessageBox bug? I posted this in microsoft.public.dotnet.languages.csharp with name of "Bug in Framework?" Drop a timer on the form, set it's interval to 1000 and put this in for the timer event: timer1.Enabled = false; MessageBox.Show("TEST"); Run the application and make sure to take focus away from the form/App. I just select my News reader. Once you do this and the message box displays the form is selectable. I know calling MessageBox.Show(this, "TEST") will make it work just fine, but shouldn't the method work the same in every case? -- Thanks Wayne Sepega Jacksonville, Fl "When a man sits with a pretty girl for an hour, it seems like a minute. But let him sit on a hot stove for a minute and it's longer than any hour. That's relativity." - Albert Einstein Tag: Control Validating Event Odd Behavior Tag: 83950

I now know this event is quirky.

I am seeing something odd, *though*.

When I set a break point inside a validating Event Handler, I see the

desired behavior when setting cancel = True.

"If the test fails, you set the Cancel property of the Validating event's

CancelEventArgs to True. This cancels the Validating event and causes the

focus to return to the control. The practical effect is that the user cannot

leave the control until the data is valid."

However, when not running in debug mode I do not see the desired behavior

when cancel = True. I am able to leave the control even though the data is

not valid.

Make sense to anyone?

Greg Robinson

Custom Data Systems, Inc.

www.cds-am.net

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