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- Previous
  - 1
    - Question about DataTable and DataGrid Hi, - I have created a table that has 4 columns (type System.String) - called myDataTable. The table is created during the Form_Load function. - I have created a DataGrid, called dataGrid1. Now, to my problem: Each time my user clicks on the "search" button, a search is performed, the table is cleared with myDataTable.clear() and filled with the new data. Then I want to bind the DataGrid to the table, using dataGrid1.DataSource = myDataTable -- which contains the new results each time. But - I am getting an exception. Since I have tried to debug this, I am almost positive that the problem is related to the binding. Can someone offer help? or shed some light on how to bind the Grid to a table? Actually I would love to know if there is a way to fill the DataGrid control without messing around with tables or datasets... BTW - I am using C# Thanks Tag: Gui-framework Tag: 66329
  - 2
    - Textbox.OnValidating event does not trigger Hello, Here is the problem, My code exits out of the TextBox.OnValidating event cleanly because the user has clicked on a menu that allows the user to load another screen, when that screen is unloaded and the cursor is back on the TextBox, I am able to tab off the textbox without it running my OnValidating event again, how do I get .Net to force the validating event to be triggered as soon as I tab off in ALL cases. Please note the CauseValidated property is set to the default value of true so I know that it should be triggering in all cases but it does not in this case. Please help, Tag: Gui-framework Tag: 66326
  - 3
    - Can I create another form in another thread? hi, everybody I want to create another form in another thread. But if I do this, the form will be created and closed immediately Can I create another form in another thread The purpose I want to do is that before the application is started, I want to display a starting form. So I create the starting form in another thread in the form() handler. Or can I use another method to achieve this thanks Tag: Gui-framework Tag: 66325
  - 4
    - IIS ports I have a winform control that works when called from a html page when IIS is running on port 80 but if i change the port(which i need to do) then it never is displayed ? anyone seen this ? do i have to alter any .net config files or anything ??? Tag: Gui-framework Tag: 66324
  - 5
    - Update current row in Datagrid Hello! When running dataadapter.update current row in my datagrid is not updated. I want the current row to be updated without having to move to another row in my datagrid. Any ideas? Regards Magnus Tag: Gui-framework Tag: 66318
  - 6
    - PeekMessage(), GetMessage() Hello All Is there an alternative of Win32 API's PeekMessage() and GetMessage() functions in .NET What I want is to peek in the message queue for a message and if it is some specific message, I need to discard it from being dispatched to the form Can this be achieved in .NET? I couldn't find any method in System.Windows.Forms.Form class Thanx in Advance Mahesh. Tag: Gui-framework Tag: 66317
  - 7
    - Set source of Datagrid with query Hi Does anyone know how to set the source of a dtatagrid by means of a query and that the datagrid only shows the columns from the query. I have some code like this Me.OleDbSelectCommand1.CommandText = "SELECT X, Y " & "FROM TABLE " & "WHERE TABLE.[X] = 2 Me.OleDbSelectCommand1.Connection = Me.OleDbConnection Me.Dataset1.Clear( Me.OleDbDataAdapter1.Fill(Dataset1 Me.DataGrid1.SetDataBinding(Dataset, "TABLE" Now the problem is that the datagrid shows all columns of TABLE instead of just the columns X and Y. I'm getting the columns of the complete table. Is it possible to show only the columns X,Y Thanx.... Tag: Gui-framework Tag: 66314
  - 8
    - Tooltips on a PropertyValueUIItem I've successfully enabled PropertyValueUIItem use on a PropertyGrid by making a Container that implements IPropertyValueUIService, and then adding the PropertyGrid to it. As a result, you get nice tiny icons that sit on the property name, and you can double-click on them to invoke a handler. However, the MSDN documentation seems to think you can also associate a tooltip with the PropertyValueUIItem. I've done so, but no tooltip comes up. I've plowed through ILDASM on several .NET DLL's and don't see any fetching of the ToolTip property -- so question is: is this actually implemented? And if not, is there a suitable workaround? (Say like 10 lines of code that will automagically re-enable tooltips in property grids...) Cheers, Glen Low, Pixelglow Software www.pixelglow.com Tag: Gui-framework Tag: 66313
  - 9
    - Use ComboBox to create a function which like the "find in files" of VS .Net hi, everybody I want to use ComboBox to create a function which like the "find in files" of VS .Net. The problem I meet is that when the user select a item of the ComboBox the selected item will become the first item. I want to do this in the SelectedIndexChanged handler. But when the selected item is moved to the first item the SelectedIndexChanged event will be fired. And it will become recursive fired. Is there any method to avoid this? Or is there other event I can fire in thanks Tag: Gui-framework Tag: 66310
  - 10
    - DataGrid's CurrentRowIndex doesn't show new row's index. I've got a strongly typed dataset with three tables. Call them parent, child, and grandchild. There are relationships between parent and child, and between child and grandchild, using fields parentId and childId respectively. parentId and childId are autoincrement, with seed = 0 and step = -1. On a form I've got a DataGrid (with the most important fields) and some textboxes (with more details) at each level. That is: dgParent.DataSource = ds dgParent.DataMember = Parent dgChild.DataSource = ds dgChild.DataMember = Parent.Parent_Child dgGrandchild.DataSource = ds dgGrandchild.DataMember = Parent.Parent_Child.Child_Grandchild txtParentDetail.DataBindings.Add(New Binding("Text", ds, _ "Parent.ParentDetail")) txtChildDetail.DataBindings.Add(New Binding("Text", ds, _ "Parent.Parent_Child.ChildDetail")) txtGrandchildDetail.DataBindings.Add(New Binding("Text", ds, _ "Parent.Parent_Child.Child_Grandchild.GrandchildDetail")) Viewing data from the database, everything is cool. I can change existing data and update it fine. I can create new grandchildren. The problem arises when I click in the last (empty) row of the Child DataGrid, wanting to create a new Child of the current parent. I enter some data, tab to the next field, and the data I entered vanishes. Furthermore, the Child-level textboxes continue to display the data of the last Child record I was looking at (before I clicked into the last row of the Child DataSet). I expected them become blank, showing that data has not yet been entered for the new Child row. Thinking perhaps the Child DataGrid and Child textboxes had somehow got different CurrencyManagers. I took a look at this: BindingContext(dgChild.DataSource, dgChild.DataMember) Is _ txtChildDetail.DataBindings("Text").BindingManagerBase. But it was true, which I think is as it should be. Then I put some code into the dgChild's CurrentCellChanged event, to display the DataGrid's current row and the CurrencyManager's position in the status bar. MyStatBarPanel.Text = "DG: " & dgTktGrp.CurrentRowIndex.ToString & _ " CM: " & BindingContext(dgTktGrp.DataSource, _ dgTktGrp.DataMember).Position.ToString What I found here was that the DataGrid's CurrentRowIndex and the CurrencyManager's Position were always the same as each other, which is good. BUT, neither of them changed when I clicked into the last (empty) row of the DataGrid. Which doesn't seem right, does it? If anyone can explain either (a) what I might be doing wrong to cause this oddness or (b) why this behavior is perfectly natural and what is the proper way to add new records at the Child level, I will be very grateful. Thomas Berg Tag: Gui-framework Tag: 66309
  - 11
    - Error '33' in the paint routine... This is one of those weird errors that probably nobody knows of, but I will try anyway, maybe somebody knows... I designed a datepicker as a drop-down control. When the control drops the floating form calendar is displayed. One can press the year and a numeric up-down appears where you can change the year. All controls are inherited and I override the WndProc and handle all mouse message so that no one of the controls gets focus, in this way the main form never looses focus when the control is dropped-down. All is fine except for the following situation: when the application starts the control is not focused. The control is then either clicked or tabbed to. If you click the year the numeric up down appears. Here is what happens: one of the buttons of the numeric up down generates an error in the WndProc on the WM_PAINT message. The error is the windows error #33: ERROR_LOCK_VIOLATION. What is extremely weird is: both buttons (up and down) are of the same exact type and they both created and dealt with in the same manner. Still only one has this strange behavior. Also, if one presses the tab key a few times and the focus goes away from the control and then returns to it... no error occurs... What can be the problem?? The floating form is a form with a custom control on it who owns the numeric up-down. The form is shown using the SetWindowPos api... If anybody has any idea, or suggestions? thank you, iulian Tag: Gui-framework Tag: 66308
  - 12
    - How to sort DataGrid using code? I guess I could change the SELECT statement to ORDER BY, but that won't show the little sort arrow on the DataGrid's column header. What is the code to sort a Windows' DataGrid column? Simulate a user clicking on a particular column header. In my case, I want to sort by "Last Name" by default. Thanks in advance. Tag: Gui-framework Tag: 66306
  - 13
    - Version resource for C# Hi, Is there a way to add a traditional C++ style version resource to a C# Windows forms-based application? The version resource is what gets displayed on the Version tab when you bring up the property sheet for the .exe or .dll file in Windows Explorer. In the documentation I see a version resource editor for C++, but it looks like resources for C# and managed C++ are done differently. I do not need to read this resource from inside the code, it is just that this is our first .NET-based product and we have an internal standard that all released products need to have correct version information in all modules. This is so tech support can have the customer bring up property sheets in Explorer to figure out exactly which versions of everything the customer is running. Thanks for your help. -Vance Gloster Tag: Gui-framework Tag: 66305
  - 14
    - How to make all buttons in toolbar the same size? Hi, I'm having some trouble making all the buttons in the toolbar the same size. My toolbar property TextAlign is set to "Underneath" and all the icons in my ImageList have a width of 48 but the actual buttons' size varies from 48 to around 60 depending on the corresponding text. What I would like is to have all buttons in my toolbar have a width of 64. I tryed changing the ButtonSize property but it didn't help. Thanks in advance for any help. Luis Tag: Gui-framework Tag: 66302
  - 15
    - InitializeComponent question Hi. What is the exact purpose of <System.Diagnostics.DebuggerStepThrough()> in the InitializeComponent routine? If I delete this attribute the form continues to run without problems and I can step into it. Regards, Chris Leffer *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Gui-framework Tag: 66299
  - 16
    - Hosting winform Controls question. Hey all, I have created a tiny web page to host my winformcontrol. When running this by default on IIS port 80 it works fine however I want to run IIS on port 90 and it doesnt seem to work correctly. I changed the IIS port the webserver listens to, and also changed the html so the port is included in the CLASSID part of the object tag but my browser does not render the control correctly. It seems to be able to locate the control as I dont get the usual little graphic in the top left corner which indicates broken link but an empty box with a disabled scrollbar. Anybody seen this before ? Is there some other confiuration change i have to make ? Tag: Gui-framework Tag: 66298
  - 17
    - Controls not refreshed using object databinding Hi I have a simple object Person with two properties ForeName, SurName The object is initialised in the form constructor and its properties are bound to two text box controls. This works fine. However if I change one of the object properties the text box controls arenâ??t updated with the new values Many thank Exmaple private Person _currentPerson public frmEmployees( // Required by VS.NE InitializeComponent() // Init _currentPerson objec _currentPerson = new Person() _currentPerson.ForeName = "Fred" _currentPerson.SurName = "Flintstone" private void frmEmployees_Load(object sender, System.EventArgs e // Databind form to current person objec txtForeName.DataBindings.Add("Text", _currentPerson, "ForeName") txtSurName.DataBindings.Add("Text", _currentPerson, "SurName") private void butChangeName_Click(object sender, System.EventArgs e _currentPerson.ForeName = "Pink" _currentPerson.SurName = "Panther" } Tag: Gui-framework Tag: 66293
  - 18
    - List tables and columns in designer I have a control that I am working on that interacts with a DataSet to display data. I want to be able to use the designer with this control in the same way as with the DataGrid control, where once a DataSet is associated with the control, I can then select tables and columns from the DataSet for displaying (assuming of course that the DataSet is stingly typed). Can anybody provide any pointers? So far I have only managed to associate the DataSet in the designer (well, that bits not exactly difficult is it!). Thanks. Tag: Gui-framework Tag: 66292
  - 19
    - Shuting Down XP from within a Windows Form Application Hi I'm fairly new to the .NET programming environment. I am writting an Windows Form application that needs to shutdown the PC that is running the application. What is the proper way to do this Please refer me to documentation that can explain how .NET applications can control the PC on which they are running One of the things I would like to do is limit the access to XP features, for example, not allowing the user to access Control Panel, once my application is started. Thanks in advance - Neil Shor Tag: Gui-framework Tag: 66291
  - 20
    - equivalent ImageList exists function ?? Hi, Can anyone tell how to see if an image exists in an imagelist by a name ? rgds d. Tag: Gui-framework Tag: 66288
  - 21
    - ANN: MathML .NET Control 2.0 (the equation editor control for .NET) released soft4science is proud to announce the immediate availability of MathML .NET Control 2.0. It is the first commercial equation editor control for the .NET Framework. MathML .NET Control 2.0 is a general-purpose equation editor specially designed for the .NET Framework. Once added to Visual Studio .NET's Toolbox, it can be dragged onto your Windows forms. Every formula you create can be saved as MathML (the XML standard for expressing math), a JPEG image or exported as a GIF image. Written in 100% managed C# code, the control offers .NET developers a fast and simple way to include a MathML based equation editor in their Windows applications. New Features in Version 2.0: - Multiline Equation Editing - Extended API (~30 new API methods) - Default Toolbar can be replaced by user defined Toolbar - Default Context Menu can be replaced by user defined Context Menu - Default Keyboard shortcuts can be deactivated and replaced by user defined shortcuts To learn more, visit our website at: http://www.soft4science.com Tag: Gui-framework Tag: 66287
  - 22
    - BeginInit() and EndInit() in Generated Code Region When I create a form using the DataForm Wizard (VS 2003), the following lines of code get generated near the top of the Windows Form Designer generated code region: CType(Me.objdsDataForm, System.ComponentModel.ISupportInitialize).BeginInit() CType(Me.grdtitles, System.ComponentModel.ISupportInitialize).BeginInit() The corresponding EndInit() statements get generated near the bottom of the region: CType(Me.objdsDataForm, System.ComponentModel.ISupportInitialize).EndInit() CType(Me.grdtitles, System.ComponentModel.ISupportInitialize).EndInit() Can someone explain to me what these statements do? Also, since the DataSet and DataGrid objects both implement the ISupportInitialize interface, why do those objects need to be converted to the interface type before the BeginInit and EndInit methods are called? Why not just call those methods directly on the DataSet and DataGrid objects? Thanks. -- Greg Dunn Tag: Gui-framework Tag: 66278
  - 23
    - Division Confusion Hi all, I'm having trouble understanding which data type to use to get results I expect. using float, decimal, and double I have tried the following, .. float test = 55/60; I always get 0 as the results. I expect 0.916666 I dont understand why its rounding down. Any pointers anybody ? Rgds, Dave Tag: Gui-framework Tag: 66269
  - 24
    - Owner draw status bar text Hi. How cai I center text on a owner draw status bar using vb.net? One of the panels of my status bar needs to be red and have some centered text in it. I discovered how to make it red, but didn't find a way to center text on the panel. Thanks, Robert Scheer Tag: Gui-framework Tag: 66268
  - 25
    - Windows Forms stops responding after debugging I am experiencing a very odd problem. When I stop my application at a break point or with an Assert, after I continue running my form stops responding. Is this a known problem or does any one have any suggustions as to what may be happing or how to "debug" it. Background: We have developed a client application that is built on multiple layers of UserControls. There are dozens of usercontrols made up of standard window Forms controls and a few inherited windows Forms controls. When ever I stop the application at a break point or with an Assert everything behaves as expected. I can step through the code, look at fields/properties etc. But when I continue the application, the webForm displays, can be minimized, maximized, but cannot be closed. Individual controls "react" to mouse movement, (for example a Treeview with hot tracking will "track" mouse over a treenode) but I cannot select a node in the tree view or List View. Menu don't open (main or context), buttons don't respond to being clicked. I will continue to try an isolate what "recent" changed were made to determine what could be causing this, since it didn't behave like this before, but I was hopeing this behavior has been seen before and there is a know course of action to resolve it or at least identify what could be causing it. Any assistance would be apreciated. Ben R. Bolton Tag: Gui-framework Tag: 66267
- Next
  - 1
    - Potential problem when closing application - help! Hello, I have a windows forms application that I am creating. When I compile in debug mode, and run the application, it all functions fine; but when I exit the application (either via the x at the top of the form window, or via my own function) it appears that something in the application keeps running, as I have to manually press the stop debugging menu option before control of the application actually stops.. Does this mean that something is not cleaning up properly in the application? And if so, how do I figure out what is causing the issue? Could this just have something to do with debug mode? Any help on this would be appreciated! Thanks! Jim ps -> I am using VB.NET 2003, and the Net Framework V1.1 Tag: Gui-framework Tag: 66263
  - 2
    - Avoiding the "File download" dialog when using the WebBrowser control to navigate to an excel file (C#/Windows Forms) Hi, My Windows Forms application uses the WebBrowser control to open an Excel file since OLE objects are gone in .Net. The application is actualy a clone of the one found in the MS Knowledge Base Article "How to Use the WebBrowser Control to Open Office Documents with Visual C# .NET" which can be found here: http://support.microsoft.com/default.aspx?scid=kb;EN-US;304662 The application does what it's supposed to (ie Loads embeded Excel and opens the file), the problem is that prior to that it displays a "File Download" dialog. For personal use i could simply uncheck the "always ask before opening this type of file" checkbox but for the the release this is not an option. I would like to know if it is possible to avoid the "File Download" dialog. Thanks in advance for any help. Luis Ferrao Tag: Gui-framework Tag: 66262
  - 3
    - Normal Size Font versus Large Font We have a large development team working on the same application. Some developers, because of their development hardware (which may be either a desktop or laptop, etc.) use Normal Size Font, while others prefer to use the Large Font setting. A problem arises because when you open up a form in the IDE, the values for size will change slightly depending upon whether Normal Size or Large Size Font is being used. This causes the size of fields and the position of fields to move around depending upon who last "touched" the form (i.e. what Font setting they were using). Nor is the change in size consistent. When Normal Size Font is used, we may size each field on the form to be 24 units tall. When it is opened on a PC that runs Large Font, these same fields may be 30, 31, or 32 units tall! The size is not only different, but fields that were consistently all sized to be 24 units tall on a Normal Size Fonts system may be any of a variety of sizes when the form is opened on a development machine that runs Large Fonts. This causes serious problems because our QA team is quick to point out forms that are laid out in a sloppy fashion! This "sloppy" appearance is simply a result of this Large Size/Normal Size Font problem in the VS.IDE. And our software testing automation tools go wild when the forms change this way! Even buttons change size slightly! We will probably have to legislate (rather arbitrarily) that everyone on the development team use Normal Size Fonts which will cause problems on some hardware platforms. Has anyone else noticed this problem? Is there a solution? We have easily reproduced this by simply changing one station from Normal to Large fonts, rebooting, and reopening the project. Argh! Thanks, -Ron Tag: Gui-framework Tag: 66259
  - 4
    - ISynchronizeInvoke.BeginInvoke and polymorphic parameters I have a problem when using ISynchronizeInvoke.BeginInvoke with polymorphic parameters. It seems that if I try to call BeginInvoke and in the array of parameters place an object that's derived from a base class my method expects as a parameter, the method gets only an object of the type of the base class, rather than my full object. I know this sounds convoluted, so here's an example. My program consists of an engine and a WindowsForms UI. The engine operates on a separate thread and reports back to the UI using the main form's ISynchronizeInvoke interface. When engine performs some operation during which it throws an exception it calls OnProcessingStageException which in turn fires and event that will be received by the UI. Here's how it looks. public event EventHandler ProcessingStageException; void FireEvent(EventHandler handler, Object sender, EventArgs e) { if (this.target != null && handler != null) { this.target.BeginInvoke(handler, new object[] {sender, e}); } } private void OnProcessingStageException(object sender, EventArgs e) { FireEvent(ProcessingStageException, this, (ExceptionEventArgs)e); } The main form's method for handling this event is defined as follows: private void OnProcessingStageException(object sender, EventArgs e) { MessageBox.Show( this, string.Format("Error performing operation.\nDetails: {0}", ((ExceptionEventArgs)e).ex), "VideoInspector"); } The problem is that when I try to cast ((ExceptionEventArgs)e) I get InvalidCast exception, even though ExceptionEventArgs inherits from EventArgs. Is this by desing or did I hit some kind of a bug? Thanks for your help Andrew Tag: Gui-framework Tag: 66258
  - 5
    - ListView's AllowColumnReorder property BUG When we set AllowColumnReorder to true and drag column headers to reorder columns, the ListView.Columns collection remains unchanged (i.e. the indexes of the column headers do not change) Is this a bug or am I something missing? Tag: Gui-framework Tag: 66252
  - 6
    - How do I get the Forms Designer MainMenu object to generate code which uses my MenuItems instead of the base MenuItems I've created a derived MenuItem class. How do I get the Forms Designer MainMenu object to generate code which uses my MenuItems instead of the base MenuItems? Base MenuItems is ReadOnly how can I supress it Tag: Gui-framework Tag: 66251
  - 7
    - MDI - how to open a child from a child within MDI parent? my problem is i have 3 form mdi form: mdiParent child form 1: frmProjects child form 2: frmProjec when my project start, it load a mdiParent form. from the mdiParent's menus, i open the frmProjects (mdiParent's child form). The problem is when i click a OK button on frmProjects, i failed to open the frmProject which supposed to be a mdiParent's child form (frmProject opened as an independent form which is not a mdiParent's child form). How to call a mdi child form from another mdi child form? Tag: Gui-framework Tag: 66241
  - 8
    - MDI - how to open a child from a child within MDI parent form? Hi, I am trying to open a child from another child within MDI. I need to keep everything within one parent form. I wrote the following for each of the menu buttons on MDI parent: Public Sub ShowMdiChildWindow(ByVal frm As Form) If frm Is Nothing Then Me.Show() Else frm.MdiParent = Me frm.Show() End If End Sub Tag: Gui-framework Tag: 66240
  - 9
    - How to make MainMenu accelerator underline appear? Everyone is familiar with the appearance of an underline below the accelerator character on a MainMenu when the user presses the ALT key. I would like the accelerator character underline to always be shown in my MDI application Is there a way to control this programmatically Thanks Dav Tag: Gui-framework Tag: 66239
  - 10
    - Out of Memory H I have three functions, each one uses a connection to get information, I close that connections when the functions finish. I call the function every 10 seconds. But I sometimes get an exception ERROR [S1001] [INTERSOLV][ODBC ]Out Of Memor ERROR [IM005] [Microsoft][ODBC Driver Manager] Driver's SQLAllocHandle on SQL_HANDLE_DBC faile How to avoid this exception Regard J.C. Tag: Gui-framework Tag: 66236
  - 11
    - What event is fired when DataGrid row changes? Is there an event that fires when the CurrentRowIndex of a Windows Form DataGrid is changed? Thanks. Tag: Gui-framework Tag: 66233
  - 12
    - Disable/enable controls On a form, when I want to disable a textbox, but leave the text readable, I set the ReadOnly flag to true. Works great. However, I don't have this option with combo-boxes. When a combo-box has Enabled = False, the text becomes unreadable. Is there a way to override the complete 'grey-out' effect by changing Forecolor/backcolor/font? --Billgs Tag: Gui-framework Tag: 66231
  - 13
    - Modifying Word templates My company has a database (Oracle) of clients that contains there names and addresses. I've been asked to look at making those names and addresses easily available in Word. My thought (at the moment) is to import them into a Word template as autotext entries and then distribute that template around the company either overnight or at login. i.e. read people's Word startup folder and drop a copy of the created template in there I've come up with the following code (with the Word library referenced) that will allow me to create the template.... Dim oWord As Word.Application Dim oDoc As Word.Document Dim oTemp As Word.Template Cursor.Current = Cursors.WaitCursor oWord = CreateObject("Word.Application") oWord.Visible = False 'Dummy template just containing a bookmark called bmark oDoc = oWord.Documents.Add("c:\norm.dot") oTemp = oWord.ActiveDocument.AttachedTemplate Dim oRange As Word.Range oRange = oDoc.Bookmarks.Item("bmark").Range 'Code here to loop through clients and do things like check for duplicate names oTemp.AutoTextEntries.Add("ddddd", oRange) oTemp.AutoTextEntries.Item("ddddd").Value = "Just testing" + vbCrLf + "Line two" oRange = Nothing oTemp = Nothing CType(oDoc, Word._Document).Close() oDoc = Nothing CType(oWord, Word._Application).Quit() oWord = Nothing Cursor.Current = Cursors.Default That seems to work but.... It needs to be run on a machine that has Word installed while, ideally, I want it to run on a server. Anyone have a way around that? Anyone have any better ideas on getting the same result? -- For real reply address, replace the _surprised_ bits with dots Tag: Gui-framework Tag: 66230
  - 14
    - NullReferenceException in datagrid while scrolling I have a problem with DataGrid, while filling a DataSet that is bound to it, which throws a NullReferenceException, and the stack trace points to some tooltip related functions in the datagrid. This happens only while scrolling with the scroll bar. I've seen a thread from 2002 where someone had the same exact problem as me, but there was no solution posted to it. Is this a known bug? any way to fix it? Tag: Gui-framework Tag: 66229
  - 15
    - Binding an indexer to the columns of a DataGrid I have an ArrayList (myArrayList) in which each element is an object of a custom class called DataRecord. DataRecord only exposes its internal data in the form of an indexer. During runtime, I need bind myArrayList to a DataGrid to display all elements of the ArrayList in the DataGrid. The number of elements of the DataRecord indexer is only known at runtime. I can of course do this... dataGrid.DataSource = myArrayList; But how can I programmatically specify that I want to set the indexer of DataRecord as the data to be displayed in the columns of the DataGrid? Can I set the .MappingName property of each column one-by-one somehow? Thanks, Bruce Tag: Gui-framework Tag: 66227
  - 16
    - Thread vs Asynch Remote call I'm using .NET remoting with SAOs from my WinForms client. For screen initialization and other processing, should I use a separate thread to call my remote operations, or should I call my remote objects asynchronously? By the way, my code has nothing to do while I'm waiting for these calls. If I had a function to perform between responses, then I believe the answer would be obvious to make my Remote calls asynchronously. Thanks for the help, Todd Tag: Gui-framework Tag: 66224
  - 17
    - Control Drawing Issue I have created a transparent control and I am using to to create drawing objects Inside the transparent objects I have created I am trying to using the draw shapes oval, rectangle etc. An example would be like in word are when you drag an oval onto the screen, the drawing resizes as the control does. The problem I am running into is actually drawing the rectangle. I am attempting to use this code here: Rect = new Rectangle(this.Bounds.X - 10, (this.Bounds.Y -10), (this.Bounds.Width - 10), (this.Bounds.Height - 10)) I have placed this code in the Resize event. It does draw, however it seems to be reponsive to the bounds of it's container rather then the control itself. What I could like is if someone can help me figure out how to draw a rectangle close to the edges of the custom control and the drawing would resize itself as the control does. Please help!!! If anyone has any examples please email them mikestarkey@hotmail.com Tag: Gui-framework Tag: 66223
  - 18
    - Control Drawing Issue I have created a transparent control and I am using to to create drawing objects Inside the transparent objects I have created I am trying to using the draw shapes oval, rectangle etc. An example would be like in word are when you drag an oval onto the screen, the drawing resizes as the control does. The problem I am running into is actually drawing the rectangle. I am attempting to use this code here: Rect = new Rectangle(this.Bounds.X - 10, (this.Bounds.Y -10), (this.Bounds.Width - 10), (this.Bounds.Height - 10)) I have placed this code in the Resize event. It does draw, however it seems to be reponsive to the bounds of it's container rather then the control itself. What I could like is if someone can help me figure out how to draw a rectangle close to the edges of the custom control and the drawing would resize itself as the control does. Please help!!! If anyone has any examples please email them mikestarkey@hotmail.com Tag: Gui-framework Tag: 66222
  - 19
    - Add WebService reference at Runtime? Is it possible to add a reference to a webservice programmatically in a Windows Form application? Basically I am looking to provide a list of URLs to the WinForm client which would then add the WebReference, do the discovery, and call a WebMethod. Any insight would be appreciated. thanks in advance... RL Tag: Gui-framework Tag: 66220
  - 20
    - Need help. Having trouble locating GDI+ exception in Windows Forms. I have a multi-threaded managed MFC C++ application that is using GDI+ through .NET. I am loading successive JPEGs into a Bitmap object in one thread and displaying them into a Windows Forms PictureBox control in another thread. Mutexs have been put in place to protect the Bitmap object and PictureBox from possible collision. However, I occasionally getting an unhandled Windows Forms exception that I cannot seem to locate and it is baffling me because the stack trace does not show any of my code layers. This exception is highly unpredictable, and ususally occurs when the application is run for the first time (Maybe before the IL is converted to native by JIT). The exception is below. I am hoping that someone might see something familiar here and could explain why this is happenning. Note that the managed C++ application also has a main native MFC dialog window that displays a managed .NET forms window. The exception dump is as follows: ************** Exception Text ************** System.InvalidOperationException: The object is currently in use elsewhere. at System.Drawing.Graphics.EndContainer(GraphicsContainer container) at System.Windows.Forms.DibGraphicsBufferManager.ReleaseBuffer(GraphicsBuffer buffer) at System.Windows.Forms.GraphicsBuffer.Dispose() at System.Windows.Forms.Control.WmPaint(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ************** Loaded Assemblies ************** mscorlib Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/microsoft.net/framework/v1.1.4322/mscorlib.dll ---------------------------------------- LogFile Assembly Version: 0.0.0.0 Win32 Version: 1, 0, 0, 1 CodeBase: file:///C:/dvr/LogFile.dll ---------------------------------------- DVR Assembly Version: 0.0.0.0 Win32 Version: 2.0.0.0 CodeBase: file:///C:/dvr/dvr.exe ---------------------------------------- System Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system/1.0.5000.0__b77a5c561934e089/system.dll ---------------------------------------- FrameGrabber Assembly Version: 0.0.0.0 Win32 Version: 1.0.0.1 CodeBase: file:///C:/dvr/FrameGrabber.DLL ---------------------------------------- Microsoft.VisualC Assembly Version: 7.0.5000.0 Win32 Version: 7.10.3052.4 CodeBase: file:///c:/winnt/assembly/gac/microsoft.visualc/7.0.5000.0__b03f5f7f11d50a3a/microsoft.visualc.dll ---------------------------------------- System.Drawing Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system.drawing/1.0.5000.0__b03f5f7f11d50a3a/system.drawing.dll ---------------------------------------- System.Data Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system.data/1.0.5000.0__b77a5c561934e089/system.data.dll ---------------------------------------- System.Xml Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system.xml/1.0.5000.0__b77a5c561934e089/system.xml.dll ---------------------------------------- GDIPlusEx Assembly Version: 1.0.1495.16797 Win32 Version: 1.0.1495.16797 CodeBase: file:///C:/dvr/GDIPlusEx.DLL ---------------------------------------- System.Runtime.Remoting Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system.runtime.remoting/1.0.5000.0__b77a5c561934e089/system.runtime.remoting.dll ---------------------------------------- DVRGUI Assembly Version: 1.0.1495.16885 Win32 Version: 1.0.1495.16885 CodeBase: file:///C:/dvr/DVRGUI.DLL ---------------------------------------- System.Windows.Forms Assembly Version: 1.0.5000.0 Win32 Version: 1.1.4322.573 CodeBase: file:///c:/winnt/assembly/gac/system.windows.forms/1.0.5000.0__b77a5c561934e089/system.windows.forms.dll ---------------------------------------- ************** JIT Debugging ************** To enable just in time (JIT) debugging, the config file for this application or machine (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: <configuration> <system.windows.forms jitDebugging="true" /> </configuration> When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the machine rather than being handled by this dialog. -- ----------------------------------- Ken Varn Senior Software Engineer Diebold Inc. EmailID = varnk Domain = Diebold.com ----------------------------------- Tag: Gui-framework Tag: 66219
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    - [ANN] February 10, "Using Windows Forms Controls in Visual Basic .NET" Chat Extending the choice of controls available from the Toolbox is a powerful way to enhance Visual Basic's application development potential. Join members of the Visual Basic .NET and Windows Forms teams to discuss using Windows Forms controls in Visual Basic .NET applications. Take this opportunity to ask the experts your questions about creating and using custom controls, user controls, and inherited controls in Visual Basic .NET. Date: February 10, 2004 Time: 1:00 - 2:00 P.M. Pacific time 4:00 - 5:00 P.M. Eastern time 21:00 - 22:00 BST/BST (For a list of local time zones relative to GMT, please see http://msdn.microsoft.com/chats/timezones.asp.) Outlook Reminder: http://msdn.microsoft.com/chats/outlook_reminders/VS_Feb10.vcs Location: http://msdn.microsoft.com/chats (then click the name of the chat to enter the chat room) 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 VB.NET Team ======== This posting is provided "AS IS" with no warranties, and confers no rights. You assume all risk for your use. (c) 2004 Microsoft Corporation. All rights reserved. Tag: Gui-framework Tag: 66218
  - 22
    - RegularExpressionValidator exact string match PLEASE - I would really appreciate some help on this! I've got a text box I'm trying to validate that should contain a 'DOMAIN\USER_NAME' entry. I'm trying to verify that a valid domain was entered + a "\", lets say it should be 'DOMAINXYZ', so I want to match 'DOMAINXYZ\ In the validator I've set the ValidationExpression to various combinations and still get the error. I've tried: ValidationExpression=".DOMAINXYZ.\\.* ValidationExpression="DOMAINXYZ\\* ValidationExpression="DOMAINXYZ\\ ValidationExpression="DOMAINXYZ Nothing seems to be working. PLEASE HELP!! Thanks! Tag: Gui-framework Tag: 66215
  - 23
    - User Control DataGridColumnStyle I'm trying to create a DataGridColumnStyle that uses a user control in a WinForm app. The .Net documentation says this can be done, but there are no instructions on HOW to do it I've seen example and have succeeded in creating a combobox ColumnStyle and Icon ColumnStyle - but can't seem to manage a custom user control. In the case of the icon the Paint functions draws the bitmap. In the case of the combobox the Paint function draws a text string, and the Edit function repositions a ComboBox and makes it visible over the cell But I want the user controls to be visible whenever the cell is visible. So I can't use a single control and just reposition it. Instead I created an array of the user controls, and am trying to display them in the Paint function. But I either get a transparent cell (see all the way through the window to the app below), or a blank cell. I've tried calling the controls .Show and it's .Invalidate methods, and I've also called it .BringToFront - but so far no luck Any help/suggestions would be greatly appreciated Below is my Paint function. ucTestPanel is my user control, and Fields is my ArrayList of user controls. Note that I've taken out and put back in all the Show, Invalidate, CreateControl calls, but it doesn't seem to make a difference Thanks Gart protected override void Paint (Graphics g, Rectangle Bounds, CurrencyManager Source, int RowNum, Brush BackBrush, Brush ForeBrush, bool AlignToRight tr ucTestPanel Field if (Fields.Count <= RowNum Field = new ucTestPanel() Field.Bounds = Bounds Field.Visible = true Field.Value = "Junk" Fields.Add (Field) els Field = (ucTestPanel)Fields[RowNum] ((ucTestPanel)Fields[RowNum]).CreateControl() ((ucTestPanel)Fields[RowNum]).BringToFront() ((ucTestPanel)Fields[RowNum]).Show() ((ucTestPanel)Fields[RowNum]).Invalidate() catch (System.Exception exc HandleError ("Error in DataGridTestPanel.Paint", exc) Tag: Gui-framework Tag: 66213
  - 24
    - great deal Tag: Gui-framework Tag: 66212
  - 25
    - Logging to eBay "in code" I have found it impossible to achieve this step. I tried HttpWebRequest with CookieContainer instantiated. It always returns an eBay page titled "Cookie Error" that says my browser does not accept cookies. I did set the UserAgent correctly to replicate Internet Explorer (which works perfectly well by the way). Any solutions please? I'm desparate! Tag: Gui-framework Tag: 66211

Which gui Frameworks do exist for .net c#?

Myself just found

SharpLibrary Version 1.37
http://24.199.8.122/

Maybe people who know other frameworks could reply ?

thx
Dulo

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RE: Gui-framework by anonymous

anonymous
Mon Feb 09 12:16:10 CST 2004

one more is her

http://www.dotnetmagic.com

HT
Sudhakar Sadasivun
Microsoft .NET MVP | MCA
http://weblogs.asp.net/ssadasivun
www.mugh.ne

----- John Smith wrote: ----

Which gui Frameworks do exist for .net c#

Myself just foun

SharpLibrary Version 1.3
http://24.199.8.122

Maybe people who know other frameworks could reply

th
Dul

Top

Re: Gui-framework by hirf-spam-me-here

hirf-spam-me-here
Tue Feb 10 14:36:02 CST 2004

* =?Utf-8?B?U3VkaGFrYXIgU2FkYXNpdnVuaVtNVlBd?= <anonymous@discussions.microsoft.com> scripsit:
> one more is here
>
> http://www.dotnetmagic.com/

My 2 Euro cents:

<http://www.devcomponents.com/dotnetbar/>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

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