Validate on ListBox item change?

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  - 1
    - Window flickers when over an opengl window I have a splash screen that displays over an application with an opengl context and the window flcikers. I would like to know how I can solve this problem. Thanks in advance. Tag: Validate on ListBox item change? Tag: 90160
  - 2
    - That damnedable ComboBox control Just ranting. Too many bugs with WinForms ComboBox. Title says it all. Ignore this post. Tag: Validate on ListBox item change? Tag: 90156
  - 3
    - AVI animation on VB.NET form howto? Hi, I tried to find how to show an AVI animation sequence like a "filecopy" animation but did not find how to do that in VB. Is there a control in VB.NET or any other way of doing it?? I be very happy for a code example if possible.....feeling a little lost for the moment ;-) br / Mikael Tag: Validate on ListBox item change? Tag: 90155
  - 4
    - problem creating transparent window... Hello guys, I am trying to create a transparent form using CreateWindowEx() by calling the unmanaged code. But everytime after the call the returned handle is zero. i could nto figure what is the problem in that... Here is the code -------------- [DllImport("User32", SetLastError=true)] internal static extern int CreateWindowEx ( int dwExStyle, string lpClassName, string lpWindowName, int dwStyle, int X, int Y, int nWidth, int nHeight, int hWndParent, int hMenu, int hInstance, IntPtr lpParam); [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct WNDCLASSEX { public uint cbSize; public uint style; public long lpfnWndProc; public int cbClsExtra; public int cbWndExtra; public long hInstance; public long hIcon; public long hCursor; public long hbrBackGround; public string lpszMenuName; public string lpszClassName; public long hIconSm; } [DllImport("User32.Dll")] public static extern int RegisterClassEx(ref WNDCLASSEX wndcls); [DllImport("user32.dll")] public static extern int ShowWindow(long hwnd, int nCmdShow); private string classname = "TestYetTransparency"; private void init() { // Let's create a window IntPtr hInst=Marshal.GetHINSTANCE(System.Reflection.Assembly.GetExecutingAssembly().GetModule("TestYetTransparency.exe")); WNDCLASSEX wndclass=new WNDCLASSEX(); wndclass.cbSize = (uint) Marshal.SizeOf(typeof(WNDCLASSEX)); wndclass.style = 11; //CS_HREDRAW+CS_VREDRAW+CS_DBLCLKS; wndclass.lpfnWndProc = 0; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInst.ToInt32(); wndclass.hIcon = 0; wndclass.hCursor = 0; wndclass.hbrBackGround = 0; wndclass.lpszMenuName = "TestYetTransparency"; wndclass.lpszClassName = classname; wndclass.hIconSm = 0; int mm = RegisterClassEx(ref wndclass); int nativeHandle = CreateWindowEx(WS_EX_TRANSPARENT ,classname ,"transparent" ,WS_BORDER ,0 ,0 ,Screen.PrimaryScreen.Bounds.Width ,Screen.PrimaryScreen.Bounds.Height ,0 ,0 ,hInst.ToInt32() ,IntPtr.Zero); ShowWindow(nativeHandle,5); //SW_SHOW } private int WS_EX_TRANSPARENT = 0x00000020; private int WS_BORDER = 0x800000; -------------- Tag: Validate on ListBox item change? Tag: 90153
  - 5
    - ListView LVINSERTMARK is invisible Hello, all: I'm trying to get the ListView Insert Mark to appear in my XP application, and though the SendMessage(...LVM_SETINSERTMARK...) call returns TRUE, the mark is not visible. I built a simple, unmanaged MFC app to do the same thing and it works. Both apps use v6 of CommCtrl, both apps use the same messages to communicate with the control... what gives? The one discrepancy I can find is, WinSpector reports the C++ app as having LVS_ICON style set, but I cannot get that to show up on the WindowsForms side (the constant is 0x0, so I don't know how to OR it with anything meaningful). I am using the LVM_SETVIEW message, but to no effect. Any suggestions would be greatly appreciated. Thank you, /m Tag: Validate on ListBox item change? Tag: 90152
  - 6
    - False error when trying to return data in datagrid VB.NET 2003 / SQLS2K The Stored Procedure returns records within Query Analyzer. But when the Stored Procedure is called by ADO.NET ~ it produced the following error message. --------------------------- Exception Message: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. --------------------------- --------------------------- Exception Source: System.Data --------------------------- If I click OK past the error messages I will get data filling the datagrid. However not as I would like to see it. Even though it returns the proper data rows and includes all the columns I asked for, it also returns plenty of columns I didn't ask for (all the columns of the main table) and all those columns are filled with "null" In addition each row header contains a red exclaimation mark whch when hovered over reads; "Column 'cmEditedBy' does not allow DBNull.Values." An interesting thing about this column 'cmEditedBy' is that there is noting wrong with it and all rows for that column contain data. I believe this error is a mistake! But it probably indicates some other problem. How should I track its cause? M O R E ... Below is the code in the data layer, the stored procedure, and the data returned within query analyzer. \\ 'DataAdapter Friend daView041CmptCyln As New SqlDataAdapter 'SqlCommand Private daView041CmptCyln_CmdSel As New SqlCommand 'Add the command daView041CmptCyln.SelectCommand = daView041CmptCyln_CmdSel 'Select With daView041CmptCyln_CmdSel .CommandType = CommandType.StoredProcedure .CommandText = "usp_View_041Cmpt_ByJobCyln" .Connection = sqlConn With daView041CmptCyln_CmdSel.Parameters .Add(New SqlParameter("@RETURN_VALUE", SqlDbType.Int, _ 4, ParameterDirection.ReturnValue, False, CType(0, Byte), _ CType(0, Byte), "", DataRowVersion.Current, Nothing)) 'Criteria .Add("@fkJob", SqlDbType.Text).Value = _ "48c64a55-874d-40d0-addc-7245f5d9c118" '.Add("@fkJob", SqlDbType.Text).Value = f050View.jobID End With End With // \\ ALTER PROCEDURE usp_View_041Cmpt_ByJobCyln (@fkJob char(36)) AS SET NOCOUNT ON; SELECT JobNumber, DeviceName, ComponentName, Description, Quan, Bore, Stroke, Rod, Seconds, CylPSI, PosA, PosB, PosC, PosD, PosE, HomeIsRet, RetIsRetrac, POChecks, Regulated, FlowControl, PortSize, LoadMass FROM tbl040cmpt INNER JOIN tbl030Devi ON fkDevice = pkDeviceId INNER JOIN tbl020Proc ON fkProcess = pkProcessId INNER JOIN tbl010Job ON fkJob = pkjobId INNER JOIN lkp202ComponentType ON fkComponenttype = pkComponentTypeId INNER JOIN lkp201DeviceType ON fkDeviceType = pkDeviceTypeId INNER JOIN lkp101PortSize on cmSmallint05 = pkPortSizeId WHERE (fkJob = @fkJob) -- fkJob = '48c64a55-874d-40d0-addc-7245f5d9c118' AND fkComponentType = 2 GO // (note - columns are wrapped) \\ F1111 Clip Driver Cylinder Clip Driver_2 - Top - Cylinder 9 1.250 2.250 .875 2.250 NULL 0 1 1 0 1 1 1 0 0 1 1/8 NPT NULL F1111 Punch Mech Cylinder Punch Mech_1 - Cylinder_2 2 2.100 2.000 1.000 1.234 NULL 1 1 0 0 0 1 1 0 0 1 1/8 NPT NULL F1111 Clip Driver Cylinder Bottom 9 2.100 2.000 1.000 1.000 NULL 1 1 0 1 0 1 1 0 0 1 1/4 NPT NULL F1111 Punch Mech Cylinder Punch Mech_1 - Cylinder_1 2 2.100 2.000 1.000 1.000 NULL 0 1 0 0 0 1 1 0 0 1 1/8 NPT NULL F1111 Degate Cylinder Degate 1 - Cylinder 2 1.188 2.500 .875 1.000 NULL 1 1 0 0 0 1 1 0 0 1 1/8 NPT NULL F1111 Clip Driver Cylinder Clip Driver 1 - Bottom 1 1.180 1.250 .875 1.000 NULL 0 0 0 1 1 1 1 0 0 1 1/4 NPT NULL // Tag: Validate on ListBox item change? Tag: 90150
  - 7
    - Activate form on mouseEnter I have an application that runs in the tray and that display a secondary topmost form. I would like that form to get the focus when the user passes over it when the mouse. I've added the code this.Activate() in the mouse move event of the topmost form but notices a strange behaviour. The first time the event is generated the taskbar button associated to the form flashes but the form doesn't get the focus. It get the focus some time after after more MouseMove events are generated. Any idea on how I can solve this? (I can post some sample code if needed). Thanks. Tag: Validate on ListBox item change? Tag: 90149
  - 8
    - Is there a dual function for ListBox.IndexFromPoint(Point p)? I'm writing a poor man's browser using an owner drawn ListBox. I was positioning the ListBox items (Controls) using Control.Location until I discovered that Control.Location has the seemingly retarded limitation of 32767 (2^16 signed integer). I had been mapping viewport coordinates to real (logical coordinates) and vice versa when translating mouse event coordinates for hit testing and when mapping real logical coordinates to viewport coordinates in painting. However upon discovering the 16 bit limitation of Control.Location I've decided to ignore that items' Location property and simply use the ListBox.IndexFromPoint(Point p) method in dispatching mouse events and DrawItemEventArgs.Bounds in paint events. In order to translate the mouse event coordinates that are in viewport coordinates to a coordinate relative to the ListBox item clicked on and which is the ListBox item retrieved via a call to: ListBox.IndexFromPoint(mouseLoc); the viewport coordinate of this same item is needed. Is there a way to get that viewport coordinate? This is necessary in order to recursively find the deepest child at a given point (assuming no overlapping children -- i.e. no z-order of children): <code> private static Control FindDeepestAtPoint(Control ctrl,Point pt) { Control child = ctrl.GetChildAtPoint(pt); if (child != null) { //map coordinates to be local to child pt.Offset(-child.Location.X, -child.Location.Y); return FindDeepestAtPoint(child, pt); } return ctrl; } </code> So in summary, is there a way to get the viewport coordinates of a visible item in a ListBox, and more specifically is there a way to get the viewport coordinates of a visible item in a ListBox in C# which has been clicked on and for which ListBox.IndexFromPoint(Point p) has returned the item in question whose viewport coordinates are desired? Tag: Validate on ListBox item change? Tag: 90148
  - 9
    - VS 2005 Beta 2 UserControl Mirroring Issue Using VS 2005 Beta 2, I set the RightToLeftLayout to Yes and had every thing working fine except the UserControl that keeps the controls, inside it, in their position and doesn't mirror them. Is there any thing I need to do? Is this a bug? Tag: Validate on ListBox item change? Tag: 90144
  - 10
    - BUG - Cancelling DataGrid row delete causes the row to disapear. Hi, I've a datagrid bound to a dataview, the problem is when I cancel the row delete, one of the rows in the datagrid disppears. If there is only one row in the grid that row disappears. If there are three rows and I cancel the deletion of the first row then the last row will disappear. The funniest part is the row will reappear if I click on the column header to sort it. I read another post in this forum which mentioned forcing the grid to redraw after cancelling the delete will solve the problem, but I can't find a way to force the redraw. I've tried grid.refresh, currencymanager.refresh, even cleared the databinding and rebound the grid, nothing happens. Can someone help me please. Thanks in advance, Debi Tag: Validate on ListBox item change? Tag: 90142
  - 11
    - CurrencyManager hangs (caused by ComboBox?) Hi guys I bound 10 ComboBoxes to a DataTable. I manage the displayed Information with the CurrencyManager. This works fine except: When the Position of the CurrencyManager is first set, the program hangs for 30 seconds. After this, it works fine. I found some information on the internet that this may be caused by the comboBoxes. However there was no information of how to solve this issue. Thanks for your time Chris Tag: Validate on ListBox item change? Tag: 90139
  - 12
    - Resize datagrid column width depending upon text enter by user. Hi, I have a datagrid control which I am displaying in a richtext box control.I want to provide the table functionality as vailable in Ms-Word for that I am using DataGrid control.As in the Ms-Word table the width of the column increases automatically if the text we are typing doesnt fit in the column.I want to provide the same kind of functionality. Thanks in advance pramay Tag: Validate on ListBox item change? Tag: 90137
  - 13
    - Disallow drag rectangle Hi, I am implementing a drag & drop feature in the list view, when u click in the list view other then the items, and u drag there is a dashed rectangle that appears. I want to disallow the creation of this dashed rectangle. any help is appreciated. regards Tag: Validate on ListBox item change? Tag: 90127
  - 14
    - Interop with OpenOffice? In my application I would like to have a powerfull text editor. RichTextBox falls a bit short of it. I cannot assume my application's user would have MS-Word (it's not standart part of the OS, hey!) Is there any ways / examples of embedding OpenOffice TextControl in .NET? Tag: Validate on ListBox item change? Tag: 90125
  - 15
    - Splash screen Hi I have a main sub as start-up. I need to display a splash screen and while it is displayed I need to do some stuff in the background like opening db connections etc. After that is done I need to close splash and open a login form. Can anyone give me a code example of how to do this elegantly? Thanks Regards Tag: Validate on ListBox item change? Tag: 90122
  - 16
    - newbie: Basic input dialog? I have a WinForms app that needs to take user input on open - before the FormMain is displayed. On the Form Load event of FormMain, I test for existence of an Access database: if (!File.Exists(Application.StartupPath + "\\myAccess.mdb")) If the mdb is not there, I need to open an input dialog form (with some additional options) for selecting a different mdb: FormDialogDifferentDatabase frmDialog = new FormDialogDifferentDatabase(); frmDialog.Show(); How do I suspend execution of the code in the FormMain while the user selects a different database? FormMain requires access to the database, so I don't want to initialize it until it has a database. Should I put this code in the constructor of FormMain? Also, how do I get the user input from FormDialogDifferentDatabase? Do I use DialogResult? I looked for examples of this but still confused... Thanks in advance. Tag: Validate on ListBox item change? Tag: 90120
  - 17
    - Q: How to highlit cell with changed value in DataGrid Hi All! My app uses databound datagrid control (binds to DataSet containing several DataTables and DataRelations). The data in DataSet are being updated what changes some cell values in DataTables (changes are made only to cells with new values). My problem is that I look for an efficient method to highlit changes in DataGrid control (preferable by changing BackColor and ForeColor properties of given cell) to alert user to new vaules. My attempt to catch TaxetChanged event in DataGridTextBox failed flat - changes in DataSource do not trigger that event. Monitoring of DataSet and DataTables obviously is possible, howoever, I would find it to be more elegant to constraint all the highliting code to DataGrid control. Any ides? Tag: Validate on ListBox item change? Tag: 90118
  - 18
    - Moving a control inside an Autoscroll Panel Hi, I need to create a control that the user may move within a panel. It works fine until I add it to a panel that has AutoScroll. The control has a transparent background, but I don't think it would be the problem. This is my actual code, most taken from web pages: > bool dragging = false; > int mousex, mousey; > > void DrawViewer_MouseUp(object sender, MouseEventArgs e) > { > if (dragging) > { > dragging = false; > Cursor.Clip = Rectangle.Empty; > this.Invalidate(); > } > } > > void DrawViewer_MouseMove(object sender, MouseEventArgs e) > { > if (dragging) > { > Point MPosition = ((ScrollableControl)this.Parent).PointToClient(MousePosition); > MPosition.Offset(mousex, mousey); > this.Location = MPosition; > //this.Invalidate(); > } > } > > void DrawViewer_MouseDown(object sender, MouseEventArgs e) > { > if (e.Button == MouseButtons.Left) > { > dragging = true; > mousex = -e.X; > mousey = -e.Y; > int clipleft = ((ScrollableControl)this.Parent).PointToClient(MousePosition).X - this.Location.X; > int cliptop = ((ScrollableControl)this.Parent).PointToClient(MousePosition).Y - this.Location.Y; > int clipwidth = ((ScrollableControl)this.Parent).ClientSize.Width - (this.Width - clipleft); > int clipheight = ((ScrollableControl)this.Parent).ClientSize.Height - (this.Height - cliptop); > Cursor.Clip = ((ScrollableControl)this.Parent).RectangleToScreen(new Rectangle(clipleft, cliptop, clipwidth, clipheight)); > //this.Invalidate(); > } > } I tried both overriding and handling the mouse events. I also thought at first the problem could be the Clip, but I finally discarded it. The main two problems are: 1) If you move the mouse fast, it starts mis-behaving. 2) If you go beyond the limits of the actual portion of the panel (when AutoScroll starts to work), the scrollbars start to go up and down, and the control gets out of control :-) Any ideas? Thanks in advance Tag: Validate on ListBox item change? Tag: 90117
  - 19
    - DbType vs SqlDbType I've been experimenting with various ways of "talking to the database" mainly a low maintenance way to switch between sql and access. I've finally got something a pretty comfortable with except for this why does this work ok param=new System.Data.SqlClient.SqlParameter(); param.DbType=paramType; param.ParameterName=paramName; param.SourceColumn=paramSourceColumn; param.Size=paramSize; and this does not //now this will give a compile error about converting to sqldbtype from dbtype System.Data.IDbDataParameter param=new System.Data.SqlClient.SqlParameter (paramName,paramType,paramSize,paramSourceColumn) ; //so now i typecast wich does compile ok but doesn't work System.Data.IDbDataParameter param=new System.Data.SqlClient.SqlParameter (paramName,(System.Data.SqlDbType)paramType,paramSize,paramSourceColumn) ; the first scenario works but it gives me concern that it may not be a good thing to do because otherwise i would expect an overload of the new SqlParameter to include dbtype Any explanation of what i'm missing would be greatly appreciated i've been messing with this for a couple of hours now -- Message posted via http://www.dotnetmonster.com Tag: Validate on ListBox item change? Tag: 90114
  - 20
    - UserPaint a TextBox - issue with WM_PRINT I am creating a custom textbox that requires me to handle the OnPaint mechanism. Currently, I am using WM_PRINT to draw the text in the textbox and am running into a problem. The text will never follow the font that is specified by the textbox, it is always the same no matter what I change it to. Is there some way to get WM_PRINT to use the font that the textbox is set with? I stripped down the code for my class to the following to show the issue: using System; using System.Windows.Forms; namespace TransTextBox { public class MyTextBox : TextBox { public MyTextBox() { this.SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer | ControlStyles.SupportsTransparentBackColor, true); } protected override void OnPaint(System.Windows.Forms.PaintEventArgs e) { System.IntPtr hdc = e.Graphics.GetHdc(); this.SetStyle(ControlStyles.UserPaint, false); try { const Int32 WM_PRINT = 0x0317; const long PRF_CLIENT = 0x00000004; Message m = Message.Create(this.Handle, WM_PRINT, hdc, new System.IntPtr(PRF_CLIENT)); this.WndProc(ref m); } catch { } finally { e.Graphics.ReleaseHdc(hdc); this.SetStyle(ControlStyles.UserPaint, true); } } } } I appreciate any help - thanks. Bob Dankert Tag: Validate on ListBox item change? Tag: 90112
  - 21
    - System.Configuration.AppSettingsReader This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C58A1E.1E392280 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable When I make changes to the config file, the changes are saved, but the = old values persist until I close the app and restart it. Is there a way = to reload the app.config file? Thanks, Brian ------=_NextPart_000_0006_01C58A1E.1E392280 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2668" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>When I make changes to the config file, = the changes=20 are saved, but the old values persist until I close the app and restart=20 it.  Is there a way to reload the app.config file?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Brian</FONT></DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0006_01C58A1E.1E392280-- Tag: Validate on ListBox item change? Tag: 90109
  - 22
    - How to change font, size and style of a label programatically I am trying to change a lables font at runtime. When I sent the labels font to New Font ("Andy",16,2) it wont allow be to set the style(2) If I remove the style it errors because the font does not support the style regular. This has to be easy....What am I doing wrong? Thanks Tag: Validate on ListBox item change? Tag: 90108
  - 23
    - want to avoid data selection in a datagrid cell hi all, iam populating a datagrid from a dataset. i set the readonly property of the datagrid to false. so i cant add and delete or change the data. but still i can select the data in every cell. when i click on the cell the data in the cell got selected. i want to avoid that. when i click on each cell i want to select the cell not the content. is there any way to do this ?? ... if i disabled the datagrid then i cant even select a cell. thanks in adavnce. waiting for a helpful reply. -- Deepson Thomas Tag: Validate on ListBox item change? Tag: 90106
  - 24
    - Specifying borders for a panel How can I do it so that I can specify which border I would like to appear on a panel? Say for example on a panel I want all sides except the right side to be drawn? Tag: Validate on ListBox item change? Tag: 90101
  - 25
    - FolderBrowserDialog won't accept the My Documents (or below) folder for the selectedpath I want to set the selectedpath in the folderbrowserdialog to a subdirectory of my "My Music" folder, yet allow the user to traverse higher than that in the directory if they want (in other words I don't want to set the root folder to this My Music, I want to set it to My Computer). But when I use a selected path that goes to My Documents or below, it doesn't accept it. Now what I mean by doesn't accept, it doesn't return an error, it just doesn't open up that node. When I try to drill down past my documents, it just leaves me at the root. It works fine (selectedpath) up to the point of my username (or other subdirs past my username other than my documents), then after that, doesn't. I'm thinking that maybe it's some type of ACL issue, but I can use directory.getdirectories to list the directories just fine. The code is as follows: Dim fb As FolderBrowserDialog = New FolderBrowserDialog fb.RootFolder = SpecialFolder.MyComputer fb.SelectedPath = "c:\documents and settings\danhi\my documents" fb.ShowDialog() This fails to expand any of the nodes in the display. If I replace the selectedpath with something like "c:\documents and settings\danhi\start menu" that works just fine. Anyone have any idea what my problem is? Dan Tag: Validate on ListBox item change? Tag: 90099
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  - 1
    - how to write a text file in a web server I have a no touch deployment application. I'm trying to write a file to a web server by using webclient class' UploadFile method but I get an security exception. What should I do to overcome this exception? Tag: Validate on ListBox item change? Tag: 90097
  - 2
    - Topmost Tool Window Greetings, I have a vb.net app, and I have a tool window that I was to be topmost while the application is in focus, but not stay on top of other apps that get the focus. Basically, I want it to behave like the tool windows in Photoshop. How do I set the attributes to do this? Thanks for your help! Kevin Tag: Validate on ListBox item change? Tag: 90096
  - 3
    - Arrow Key behavior for a Textbox inside a DataGrid I have a DataGrid, with a custom ColumnStyle that displays a user control. The user control has several TextBoxes on it. I would like these TextBoxes to act like normal textboxes with regards to the arrow keys--right and left would move the cursor, holding down shift would highlight text, etc. I can inherit from TextBox, and override the ProcessCmdKey and do all this explicitly, but that seems a lot like re-inventing the wheel. Is there another way to do this that essentially just tells the DataGrid to treat the TextBox like a real TextBox? Thanks Tag: Validate on ListBox item change? Tag: 90095
  - 4
    - SystemTray Balloon Window suppressed with fullscreen apps? I read that the system tray balloon window will be suppressed when there's a fullscreen app running like a game or PowerPoint presentation. I've personally verified this behavior, but it doesn't seem to be smart enough to know that the task bar is on a second monitor. It just seems to check that a fullscreen app is running "somewhwere" and supresses the balloon notification. How do I suppress this behavior? I want the balloon windows to show whether there's a fullscreen app running or not. I'm using the NotifyIconEx C# control posted on CodeProject. It's pretty much a C# wrapper for the Shell_NotifyIcon() API call. I've looked at the common controls docs in MSDN and didn't see any flags or options in the NOTIFYICONDATA structure that would imply I could control that behavior. Any ideas? Or am I stuck with the default behavior? Thanks, Terry Tag: Validate on ListBox item change? Tag: 90094
  - 5
    - VB.Net 2003 with Zebra Barcode Printer on Network How do I print something to a Zebra Barcode Printer that is on a network (IP address)? The following code generates an error message (Invalid Handle) on line marked with *** Dim Texxxt As String Dim SA As SECURITY_ATTRIBUTES Dim outFile As FileStream, hPortP As IntPtr LPTPORT = "111.222.333.444" Texxxt = Me.RichTextBox1.Text hPort = CreateFile(LPTPORT, GENERIC_WRITE, FILE_SHARE_WRITE, SA, OPEN_EXISTING, 0, 0) hPortP = New IntPtr(hPort) 'convert Integer to IntPtr *** outFile = New FileStream(hPortP, FileAccess.Write, False) 'Create FileStream using Handle Dim fileWriter As New StreamWriter(outFile) fileWriter.Write("^NC^") fileWriter.Write("^XA^") fileWriter.Write("^FO50,50^A030,30^FD MyTest^FS") fileWriter.Write(Chr(34)) fileWriter.Write("^FO50,100^A030,30^FD UNITED STATES^FS") fileWriter.Write("^XZ^") fileWriter.Write(Chr(13)) fileWriter.Write(Chr(10)) fileWriter.Flush() fileWriter.Close() outFile.Close() retval = CloseHandle(hPort) Tag: Validate on ListBox item change? Tag: 90093
  - 6
    - Draft font printing Does someone know how to print draft font using plain c# (PrintDocument) ? or some 3 party NET component ? I have an Intermec termal printer and wuold like to print a small report using printer fonts (for barcode). I can do this easily with msaccess using a label and selecting installed intermec printer specific fonts. But these fonts doesn't seem to be available on c# (using Font class). Some hint ? Thanks in advance Tag: Validate on ListBox item change? Tag: 90088
  - 7
    - Autoscroll scrollbar thumb position being reset upon focus change Given the following Form with a panel with autoscroll set to true and with enough controls at different locations to cause autoscrolling to be visibly on, there is a slight annoyance with the behavior of the scrollbar upon switching focus to another window -- the scrollbar thumb position automatically gets reset to zero upon the Form getting the focus back. When I open standard windows apps like Microsoft Word and scroll down a document and then lose focus by switching to another application and then regain the focus on that Word document, the scrollbar thumb position is same as it was upon losing focus. Is this a bug/feature that I need to work around by saving off the thumb position in the Control.LostFocus event handler and restore in the Control.GotFocus event handler? Or is there some super simple way like a property setting - (the more I learn C#, the more I realize that some things are ridiculously simple if you know what property to use -- e.g. using Control.UseWaitCursor property of a container control instead of having to worry about setting the Cursor property to WaitCursor for each control contained by that container). <code> using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace autoScrollTest { public partial class Form1 : Form { public Form1() { Panel p = new Panel(); this.Controls.Add(p); p.AutoScroll = true; for (int i = 0; i < 1000; i++) { Button btn = new Button(); btn.Visible = true; btn.Text = "Button " + i; btn.Location = new Point(0,i * btn.Height); p.Controls.Add(btn); } } } } </code> Tag: Validate on ListBox item change? Tag: 90086
  - 8
    - Resources Hi, I am developing a Windows Form app, that has graphical buttons. Obviously I use the same button more than once throuout the application, but Visual Studio would appear to embed a set of images for each button into the program resources, instead of using a commen one. If I can make it use a common copy, I could reduce the size of my final exe file quite considerably. Is there a way I can edit this, and what is the best way to do it? Thanks. Paul Tag: Validate on ListBox item change? Tag: 90083
  - 9
    - Developing Windows App for different screen resolutions Hi, Our project requirement is to develop app for 2 different screen resolutions 1024x768 and .. 800x600.so basically I want my forms loaded with controls behave expectedly when screen resolution changes..how can this be done? thanks Tag: Validate on ListBox item change? Tag: 90080
  - 10
    - Drag/Drop an Image from a Web Browset I've implemented a drag & drop operation which allows an image (or a file containing an image) to be dropped onto a custom control. This works fine on dragging an image file already on my hard drive, but on dragging an Image from any web page in a web browser, I'm getting an "Out of memory" exception thrown, but there appears to be plenty of memory left. Why could this be happening ? NB. On dragging a web image, files[0] contains a reference to the image in my web cache (in short directory format), for example: "C:\\DOCUME~1\\JEREMYB\\LOCALS~1\\TEMP\\DisplayBannerImage.gif" Could this be why ? If so how CAN I implement dragging an image from a web browser ? Here's the relevant sections of code: public Form1() { InitializeComponent(); AlbumControl ac = new AlbumControl(p, atype, AutoLookup, cwidth /*, false*/); ac.AllowDrop = true; ac.DragDrop += new DragEventHandler(ac_DragDrop); ac.DragEnter += new DragEventHandler(ac_DragEnter); } private void ac_DragDrop(object sender, DragEventArgs e) { Image droppedImage = null; // Handle FileDrop data. if (e.Data.GetDataPresent(DataFormats.FileDrop)) { // Assign the file names to a string array, in // case the user has selected multiple files. string[] files = (string[])e.Data.GetData(DataFormats.FileDrop); try { // Assign the first image to the picture variable. droppedImage = Image.FromFile(files[0]); } catch (Exception ex) { MessageBox.Show(ex.Message); return; } } AlbumControl ac = (AlbumControl)sender; if (droppedImage != null) { // DO SOMETHING WITH IMAGE !! ac.MainImage = droppedImage; } // Force the control to be redrawn with the image. ac.Invalidate(); } private void ac_DragEnter(object sender, DragEventArgs e) { // If the data is a file or a bitmap, display the copy cursor. if (e.Data.GetDataPresent(DataFormats.FileDrop)) { e.Effect = DragDropEffects.Copy; } else { e.Effect = DragDropEffects.None; } } Tag: Validate on ListBox item change? Tag: 90079
  - 11
    - visual demo idea to shut up a mac developer?.... I'm porting a Mac application to window. Regularly I have comment like that: - (me): hum.. there is no shadow object in .NET's Graphic's object. - (him): what? but that's standart (mac) stuff!!! or - (me): well, the default RichTextBox doesn't handle kerning (character spacing). - (him): what? but that standart feature of Text editor! and that goes on...... that kind of irk me as well. I'm thinking.. well and what about code security? nice introspection, reflection & documented serialization? display control in a web page? strongly typed code collection? exception? remoting? (DO is crap) memory corruption free code? developer productivity? But he might not even realized what I'm speaking of.... (and the last one he said: ha, like java!) Grrmmrrbll.... I wonder, does any one has any idea of a simple visual demo .NET to shut this Mac gnagnagna? well, we browse through all the controls to look for an idea.. Tag: Validate on ListBox item change? Tag: 90078
  - 12
    - render an Rtf string I have a text editor which returns me an Rtf string and I want to draw on my control. My control il a bit like a drawing program, with various shape. I can't put a RichTextBox on (or many for that matter) So, is there anyway, tutorial to render Rtf? Tag: Validate on ListBox item change? Tag: 90077
  - 13
    - Multiple Main Menus using VB.NET Code on WinForm Can someone post the vb.net code which creates dynamic multiple main menus on WinForm. In MSDN help, it gives codes which just creats only one Main Menu from the Code. I am looking for code to have Multiple Main Menus like given below. File Edit View Exit mnuFileItem1 mnuEditItem1 mnuViewItem1 mnuFileItem2 mnuEditItem2 mnuViewItem1 Tag: Validate on ListBox item change? Tag: 90076
  - 14
    - Listview, reselect previous item, Delegates, Invokes Win32, Postmessage etc. I've got a listview on a form in report style. It's populated with 40 items. I want to prevent the user clicking on some items, and if the user clicks on one of these items I want the selection to revert back to the old selection, hideselection property if false, listview is single select. In the OnSelectedChange() handler I test to see if the newly selected item is a selectable one, if it's not, I try to change the selection like so. private void OnSelectedItemChanged(object sender, System.EventArgs e) { if( listView1.SelectedItems.Count != 0 ) { int idx = listView1.SelectedItems[0].Index; bool ret = execScript.isExecutable(idx); if(ret == false) { listView1.Items[execScript.getCurrentExecNum()].Selected = true; listView1.Select(); listView1.EnsureVisible(execScript.getCurrentExecNum()); listView1.Focus(); } } This doesn't work. Neither does posting a user message to this function by overriding the WndProc and calling Win32 [DllImport("user32.Dll")] public static extern Int32 PostMessage(IntPtr Handle, Int32 ConnectionType, IntPtr wParam, IntPtr lParam); ResetSelection() { listView1.Items[execScript.getCurrentExecNum()].Selected = true; listView1.Select(); listView1.EnsureVisible(execScript.getCurrentExecNum()); listView1.Focus(); } Neither does using a delegate like this listView1.BeginInvoke(new OnSelectedItemChangedDelegate(ResetSelection),null); Neither does adding a filter on to the listview control and trapping the LVN_ITEMCHANGING or LVN_ITEMCHANGED message in the WM_NOTIFY. Interesting to note though if I add a button to the form and call my ResetSelection() function it works fine. Three days I've spent on this. Can anyone help? Thanks Youngie... Tag: Validate on ListBox item change? Tag: 90073
  - 15
    - Accessing merge fields Word doc via VB.Net Given the following merge fields defined on a word document how can I acccess them via a Word document object in VB.NET? The data I want to subsititute is in a dataset. {MERGEFIELD "FirstName"} for example I would place row.FirstName in this field {MERGEFIELD "Picture1"} Here I want to place a picture loaded from a path for example contained in row.PhotoPath Any help would be appreciated. WR Tag: Validate on ListBox item change? Tag: 90068
  - 16
    - Listbox event for add/remove item? I want to enable/disable buttons depending on whether items exist in a listbox. I thought fore sure there would be an event anytime an item was added/removed from a listbox...and I could register for it to change my button status. But...I can't seem to find these events? Am I missing something? Is there any event that I could use? Amil Tag: Validate on ListBox item change? Tag: 90065
  - 17
    - PropertyGrid and UITypeEditor Hi! So I've created a custom class and I'm working on creating editor support for it. I've created and bound a custom UITypeEditor to it and everything. Here's the thing though: At design time, the property editor shows the little ... button next to a property of my type. I can clikc the button and a dialog pops up which I created. This is good and works as I expected. Here's the problem - at run time, I have a property grid control and I have SelectedObject set to an instance of an object which has a member of my type. However, when I select the property at run time using a propertygrid control on my form, the property is greyed out as if it was readonly, and the ... box doesn't show up. What do I need to do to be able to edit my control at runtime? Tag: Validate on ListBox item change? Tag: 90063
  - 18
    - PowerPoint and .NET - looking for components - do you know any? Hi I'm looking for a .NET commercial component that would allow me to create/edit ppt files, especially to handle emedded graphs - so far without a result. Do you whether such a component exists? TIA Simon Tag: Validate on ListBox item change? Tag: 90059
  - 19
    - How to force a datagrid to redraw? Hi, I've a datagrid bound to a dataview, the problem is when I cancel the row delete, one of the rows in the datagrid disppears. If there is only one row in the grid that row disappears. If there are three rows and I cancel the deletion of the first row then the last row will disappear. The funniest part is the row will reappear if I click on the column header to sort it. I read another post in this forum which mentioned forcing the grid to redraw after cancelling the delete will solve the problem, but I can't find a way to force the redraw. I've tried grid.refresh, currencymanager.refresh, even cleared the databinding and rebound the grid, nothing happens. Can someone help me please. Thanks in advance, Debi ******************************************* Private Sub OnGrid_RowDeleting(ByVal sender As Object, ByVal e As DataRowChangeEventArgs) Try If Not Deleterow(sender, e) Then bUnDelete = True End If Catch ex As Exception WriteToErrorLog(ex.Message & "----" & ex.StackTrace) Finally End Try End Sub Private Sub OnGrid_RowDeleted(ByVal sender As Object, ByVal e As DataRowChangeEventArgs) Try If bUnDelete Then e.Row.RejectChanges() '''''''''''''''''''''''Redraw here???????????? End If Catch ex As Exception WriteToErrorLog( ex.Message & "----" & ex.StackTrace) Finally End Try End Sub Tag: Validate on ListBox item change? Tag: 90058
  - 20
    - restricting maximising child form in MDI app Hi, iam facing a small probelm ... iam creating an MDI application in .net ver 2 and IDE is vb.net 2005 express. whenever i creates a form i sets the formborderstyle as "fixedtoolwindow" so that only close button will be there. No maximise and minimise buttons. but at the runtime if i double click on the titlebar of the childwindow it maximising itself to fill itself in the MDI app. i want to avoid this situation. can canybody help me how to do stop this ??... thanks in advance -- Deepson Thomas Tag: Validate on ListBox item change? Tag: 90057
  - 21
    - setting datagrid column width according to data without looping Hi all, can anybody tell me any way to set the column width of all columns of a datagrid according the data. one thing i can do is check the whole data in acolumn and find the longest text and set the column width as the length of text. but if the number of rows and colums is more this solution not sounds good. basically i want to know any way to do this task without any loops ...iam using vb.net 2 in VS 2005 express beta 2. winforms. thanks in advance -- Deepson Thomas Tag: Validate on ListBox item change? Tag: 90055
  - 22
    - Datagrid column Resizing event Hi all, iam currently working on winforms and iam using a a datagrid. in that when i click on the border of a column it adjusts itz width itself according to the data of that column. What i want to know is what even is fireing when i double click on the column border thanks in advance -- Deepson Thomas Tag: Validate on ListBox item change? Tag: 90053
  - 23
    - Keeping track of checked nodes in treeview Hi I have a treeview where I want to perform some actions on only the checked nodes. I don't really want to have to traverse the entire tree every time, since it's a pretty big tree, so what I was trying to do was keep a list of all the checked nodes - I handle the aftercheck event so that every time a node is checked I add it to my list, and when it's unchecked I remove it from my list. This can become clumsy, though - for example, if I want to programmatically uncheck some nodes, I can't just iterate through my list and uncheck them, since that will modify the collection that I'm enumerating through. Is there a better approach that I'm missing? Tag: Validate on ListBox item change? Tag: 90051
  - 24
    - Graphing tool Hello there Can any one please direct me to a site where i can purchase a graphing tool. The tool should have features engineering graphs, probability, youzooming and dynamic views. Thank you Tag: Validate on ListBox item change? Tag: 90046
  - 25
    - How to lock CheckState in CheckedListBox? I have a CheckedListBox where some of the items are checked and some are not. I want the CheckState to be Read Only. Unfortunately, the Locked property doesn't seem to prevent the user from changing the CheckState. The CheckedListBox is on a Tab Control if that makes any difference. Any help is greatly appreciated. carl Tag: Validate on ListBox item change? Tag: 90038

I have a listbox that, when the user changes the selection, updates a form
with data related to the selected item. If the user modifies the data, I
want to be able to validate the data BEFORE the selectedindexchanged event
is fired.

Any ideas?

Amil

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