How to lock CheckState in CheckedListBox?

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  - 1
    - Which form event to use? I want to show or hide controls on the form based on the value of an exiting public boolean value. Me.btnAddRow.Visible = bDataEntry Which form event does this belong in? putting it in the Form_Load event does not work. Should it be put in just after the initialize component? (I have verified that the boolean has the value.) Tag: How to lock CheckState in CheckedListBox? Tag: 90037
  - 2
    - gdi+ book? Hi, there doesn't appear to be to many books on the topic. A couple of books had bad reviews on amazon. Im not wanting to get into really advanced gdi+ programming. I probably just use it to create controls. Nothing really advanced. Does Chris Sells book on Windows Forms go into enough detail with GDI+ Or do you need another book? If so which book would you recommend? Is " .NET Graphics and Printing: A Comprehensive Tutorial and Reference for Developers " any good? thanks, Brent Tag: How to lock CheckState in CheckedListBox? Tag: 90032
  - 3
    - Console window appear when starting a win forms inside IE We have a winforms application that is started from IE. When we start the application with the URL (like www.myapp.com/OurApp.exe), a console window appear before the first form of our application. The console window stay until the application is close. Why this window is here ? The project property of the exe is -Output type --> Windows Application -Startup Object --> CoucheClient.ApplicationEit (this is a class within the assembly. She as a Sub Main function. -Root namespace --> Mtq.Eit. Thanks for your help ! Tag: How to lock CheckState in CheckedListBox? Tag: 90028
  - 4
    - owner drawn ListBox repaint issues I am using variable height owner-drawn ListBox using new Visual Studio 2005 Beta. It appears to not repaint items in ListBox until I actually select them. In the constructor of my ListBox I call the following code: <code> this.DrawMode = DrawMode.OwnerDrawVariable; this.DrawItem += new DrawItemEventHandler(HandleDrawItem); this.MeasureItem += new MeasureItemEventHandler(HandleMeasureItem); this.HorizontalScrollbar = true; this.MouseDown += new MouseEventHandler(HandleMouseDown); this.MouseUp += new MouseEventHandler(HandleMouseUp); this.SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer | ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true); this.UpdateStyles(); </code> Then in the DrawItem and MeasureItem code I do the following: <code> public void HandleDrawItem(Object sender,DrawItemEventArgs e) { if (e.Index < 0) return; e.DrawBackground(); //Draw control onto bitmap Control ctrl = (Control)this.Items[e.Index]; //using (Image tmpImg = new Bitmap(ctrl.Bounds.Width, ctrl.Bounds.Height)) //{ // using (Graphics g = Graphics.FromImage(tmpImg)) // { // Utils.ControlPainter.PaintControl(g, ctrl); // } // ////map ctrl location to viewport coordinates // //Point loc = ctrl.Location; // ////top left of viewport corresponds to // ////location of topCtrl // //Control topCtrl = (Control)this.Items[this.TopIndex]; // //loc.Offset(-topCtrl.Location.X, -topCtrl.Location.Y); // //g.TranslateTransform(loc.X, loc.Y); // e.Graphics.DrawImage(tmpImg, e.Bounds); //} e.Graphics.DrawString("item: " + e.Index, this.Font, Brushes.Blue, e.Bounds); e.DrawFocusRectangle(); } public void HandleMeasureItem(Object sender,MeasureItemEventArgs e) { if (e.Index >= this.Items.Count) { return; } Control ctrl = (Control)this.Items[e.Index]; ctrl.Location = nextLocation; e.ItemHeight = ctrl.Height; nextLocation.Y += e.ItemHeight; e.ItemWidth = ctrl.Width; HorizontalExtent = Math.Max(e.ItemWidth, HorizontalExtent); } </code> However, the painting doesn't appear to be done until I actually select the item. Do I need to invalidate the whole listbox initially and then every time I scroll? Tag: How to lock CheckState in CheckedListBox? Tag: 90027
  - 5
    - *insert curse here* Hi I have a simple app where the user is prompted with a password dialog. When the password is being entered, the cursor is hidden as I assume is default XP behavior. The problem is when the user closes the dialog pressing the enter key (without any mouse movements done) the cursor will only reappear again when a mouse button has been clicked, not only by mouse movements. I have tried putting a Application.DoEvents() after the dialog closes but that only solves the problem when the cursor is located above the parent form. If the cursor is outside, it still won't reappear when moved back over the form. Any known reason for this? /Andreas Zita Tag: How to lock CheckState in CheckedListBox? Tag: 90024
  - 6
    - MAPISendMail Hangs Hello Group! MAPISendMail hangs forever. It only works if in the VS.NET debugger I hit a breakpoint anywhere *after* MAPILogon and *before* MAPISendMail. Without breakpoint the app hangs forever on MAPISendMail. Funny thing is, if the app starts a minimised Notepad just before MAPISendMail, it (MAPI) will continue after which the app kills the Notepad proces. This is a very ugly trick. This problem occurs in a large MDI app but not in a small test Windows.Forms app! (If the MAPI calls are put on a separate thread then MAPILogin fails). What could be the reason and fix? Thanx in advance for any pointers, Marius. ----------------------- Some code snippets: ' hwnd = IntPtr.Zero or MDI.Handle: No difference ' flags = MAPI_LOGON_UI+MAPI_NEW_SESSION: No difference ' no problem dim result as Integer = MAPILogon(hwnd, Nothing, Nothing, MAPI_LOGON_UI, 0, session) Dim msg as MapiMessage msg.Subject = subject msg.NoteText = body msg.MessageType = "" msg.RecipCount = 1 Dim recip As MapiRecip recip.RecipClass = MAPI_TO recip.Name = toEmail size = Marshal.SizeOf(recip.GetType) ptr = Marshal.AllocHGlobal(size) Marshal.StructureToPtr(recip, ptr, False) msg.Recips = ptr ' *BLOCK* if no 'pause' msg = MAPISendMail(session, hwnd , msg, MAPI_LOGON_UI, 0) ' log off --- <DllImport("mapi32.dll")> _ Public Shared Function MAPILogon(ByVal hwnd As IntPtr, _ ByVal username As String, _ ByVal password As String, _ ByVal flags As Integer, _ ByVal reserved As Integer, _ ByRef session As IntPtr) As Integer End Function <DllImport("mapi32.dll")> _ Public Shared Function MAPILogoff(ByVal session As IntPtr, _ ByVal hwnd As IntPtr, _ ByVal flags As Integer, _ ByVal reserved As Integer) As Integer End Function <DllImport("mapi32.dll")> _ Public Shared Function MAPISendMail(ByVal session As IntPtr, _ ByVal hwnd As IntPtr, _ ByRef message As MapiMessage, _ ByVal flags As Integer, _ ByVal reserved As Integer) As Integer End Function <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiMessage Public Reserved As Integer Public Subject As String Public NoteText As String Public MessageType As String Public DateReceived As String Public ConversationID As String Public Flags As Integer Public originator As IntPtr Public RecipCount As Integer Public Recips As IntPtr Public FileCount As Integer Public Files As IntPtr End Structure <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiRecipient Public Reserved As Integer Public RecipClass As Integer Public Name As String Public Address As String Public EIDSize As Integer Public EntryID As IntPtr End Structure <StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _ Private Structure MapiFile Public Reserved As Integer Public Flags As Integer Public Position As Integer Public PathName As String Public FileName As String Public FileType As IntPtr End Structure -------- Tag: How to lock CheckState in CheckedListBox? Tag: 90022
  - 7
    - Adobe Acrobat won't close I have the following code in VB.Net 2003 to open up a PDF document using Adobe Acrobat 5.0. It opens up and closes pdf document and Acrobat application fine at the first time but the second time Acrobat's File->Exit or clicking on X to close Acrobat won't close application. The document is able to close and I have to use Task Manager to close application. Any suggestions? Dim AcroApp As Acrobat.CAcroApp Dim PDDoc As Acrobat.CAcroPDDoc Dim avDoc As Acrobat.CAcroAVDoc AcroApp = CreateObject("AcroExch.App") PDDoc = CreateObject("AcroExch.PDDoc") If PDDoc.Open(MyPdfFile.pdf) Then 'PDDoc.Magnification(200) AcroApp.Show() AcroApp.Maximize(100) avDoc = PDDoc.OpenAVDoc("") Else MsgBox("Unable to open the PDF file", vbInformation) End If avDoc = Nothing PDDoc = Nothing AcroApp = Nothing Tag: How to lock CheckState in CheckedListBox? Tag: 90016
  - 8
    - Serializing changes made to control via custom designer to source Got a custom designer that changes the arrangement of subcontrols in a custom control. It works fine, but if I save the form/rebuild the solution, exit out, and re-open the form, the subcontrols are back to their original place. I know I have to change how the custom control is serialized back to the code, and I believe it has something to do with Type Converters, but all I can find is information on how to serialize properties. Since this is not a property, but the order subcontrols are added to the custom control, I don't know how to deal with this. How do I go about doing this? TIA. Tag: How to lock CheckState in CheckedListBox? Tag: 90014
  - 9
    - How can I remove the System Menu? I have a mdiparent form without any controls. It contains one midchild form. When the mdichild form maximizes, its System Menu appears (in upper left and right corners) and the system menu occupies part of the mdiparent form. Is there any way to remove the system menu and the part occupied? Thank you very much. Tag: How to lock CheckState in CheckedListBox? Tag: 90012
  - 10
    - Siziing UserControls via a custom ControlDesigner We need to know which edge of a UserControl is being stretched when in design mode. We've created our own CustomControlDesigner, derived from ControlDesigner for our UserControl. We can't find a way to determine which edge of the Designer/Control is being stretched when the control is being resized in design mode. We want to resize different fields within the UserControl, based on the edge being dragged. There does not appear to be a way to get a mouse-down event before the resize to see which edge the user is being dragged. Any Ideas? Thanks Tag: How to lock CheckState in CheckedListBox? Tag: 90011
  - 11
    - Can I Word document in a Windows Form in .NET? I have tried the Microsoft Web Browser Control (shdocvw.dll) but there are a few issues with this such as the missing toolbar buttons and so on. Has anyone created or know of a control that wraps Word but leaves all of it's power intact? Thanks. Tag: How to lock CheckState in CheckedListBox? Tag: 90005
  - 12
    - Another 'The variable is either undeclared or was never assigned' Hi all, I've created an user control with an 'Enum' property in a windows lkibrary (dll), like this public enum ComboBoxTypes { Null, Task, Content, Language, Format, SectorType } private ComboBoxTypes comboBoxType = ComboBoxTypes.Null; // default public ComboBoxTypes ComboBoxType { get { return comboBoxType; } set { comboBoxType = value; } } So I've created new WinApplication and I've try to add my control to mainform, and by design set ComboBoxType property Now everytime I try to open mainform in design mode message "The variable 'ComboBoxTypes' is either undeclared or was never assigned." appears and inside InitializeComponent() function mycontrol.ComboBoxType resets to ComboBoxTypes.Null Why??? Thanks al lot Edo Tag: How to lock CheckState in CheckedListBox? Tag: 90002
  - 13
    - Reference to "My Pictures" folder From within a C# windows application, how can I get a reference (full path) to the current user's "My Pictures" or "My Documents" folder ? Please include any namespace references I'll need. Thanks. Tag: How to lock CheckState in CheckedListBox? Tag: 90001
  - 14
    - StackOverflowException when creating a new object Hi all. I am creating an apliction dll for my project. the call lib use a custom class, when i try to create a new object of the class it wiill generate a StackOverflowException. i am not using any Recurse function in the class. the exception occures even befor exicuting the objects constructor. please help me Tag: How to lock CheckState in CheckedListBox? Tag: 90000
  - 15
    - LongHorn Style Windows Form Hi Guys, After seeing a longhorn screen shot, I got excited by its windows style. The form of it is half transparent, and the client area is opaque. Did anyone successfully implement this style of form? I tried many ways, but can find the road to it. Kit Tag: How to lock CheckState in CheckedListBox? Tag: 89999
  - 16
    - .NET - MDI - Container - (Internet Explorer) ActiveX loses parent Hi everyone, We are currently developing an application in C# which has MDI forms. Each MDI form has a detach-button which removes the form from its parent and displays it as a regular form. In .NET, you can use the System.Windows.Forms.Form.MdiParent property. Everything seems to work when regular .NET controls are part of the MDI form. However, if there's an ActiveX control on the form, it loses its parent and gets drawn somewhere on the screen, floating, not part of the MDI parent and not part of the MDI form. This is the case with for example the Internet Explorer ActiveX (shdocvw), the Remote Desktop ActiveX (msrdp) and probably a lot of others. We did not have that problem with a third-party component, which seems to remember its direct parent. I guess we forgot something in the approach on how to handle the microsoft ActiveXs. Has anybody a clue for this problem? We already checked every property of the AxHost and Form (container, toplevelcontrol, toplevel, parent, ...) but they're all updated correctly after the detach. We also tried to toy with the SetChildIndex function... Here are the important snippets of a sample application, full source upon request. Project consists of 2 forms, MainForm (the MDI parent) and ChildForm (the MDI child). --- MainForm Load event : Start --- this.IsMdiContainer = true; ChildForm child = new ChildForm(); child.MdiParent = this; child.ShowInTaskbar = false; child.Show(); child.ChangeUrl(); --- MainForm Load event : Stop --- ChildForm has one button (DetachButton) and an Internet Explorer ActiveX (Microsoft Web Browser from the Microsoft Internet Controls) --- ChildForm : DetachButton event : Start --- private void DetachButton_Click(object sender, System.EventArgs e) { this.MdiParent = null; this.ShowInTaskbar = true; ChangeUrl(); } --- ChildForm : DetachButton event : Stop --- --- ChildForm : Public method : Start --- public void ChangeUrl() { axWebBrowser1.Navigate("http://www.microsoft.com"); } --- ChildForm : Public method : Stop --- Run the application and the MDI form will show the microsoft-website. Click detach and the form will be detached from its parent. The ActiveX starts floating and is not part of the ChildForm anymore. Thanks for your time! Wim Verbeke Tag: How to lock CheckState in CheckedListBox? Tag: 89996
  - 17
    - Howto :: Multiline DataGridView :: More precisely a Multiline DataGridViewTextBoxColumn Hi, I found less in the docs about a Multiline DataGridView. More precisely a Multiline DataGridViewTextBoxColumn --------------- I found the following infos: multiline datagridview cells? ... http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=4334 DataGridViewCellStyle.WrapMode Property ... http://whidbey.msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/P_System_Windows_Forms_DataGridViewCellStyle_WrapMode.asp Sizing Options in the Windows Forms DataGridView Control ... http://msdn2.microsoft.com/library/74b2wakt(en-us,vs.80).aspx --------------- This example works for me, but does anyone have any suggestion for improvement? dgv.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells; DataGridViewCellStyle cellStyle = new DataGridViewCellStyle(); cellStyle.WrapMode = DataGridViewTriState.True; dgv.Columns["LongText"].DefaultCellStyle = cellStyle; Greetings Gordian Tag: How to lock CheckState in CheckedListBox? Tag: 89994
  - 18
    - Performance of Panel.Control.Clear Hello folks, for showing data from my database i use a Master-Panel which have added Detail-Panels for each row of the dataset. Inserting the Detail-Panels running this code disDetails.Controls.Clear() For Each r As DataRow In myDataSet Dim p As myDetailPanel p = New myDetailPanel(r) p.Dock = DockStyle.Top disDetails.Controls.Add(p) p.SendToBack() Next If i chance to the next Masterrecord and displaying the new Detailrows (maximum 15 rows) i have to wait 1-5 seconds. Cause of this bad performance I inserted "Debug.Writeline(Datetime.now.ticks)" and found that most of this time (80%) will used for running the Controls.Clear() statement. Thanks in advance for any help to get a better performance. Niels Tag: How to lock CheckState in CheckedListBox? Tag: 89993
  - 19
    - Howto :: Multiline DataGridView :: More precisely a Multiline DataGridViewTextBoxColumn Hi, I found less in the docs about a Multiline DataGridView. More precisely a Multiline DataGridViewTextBoxColumn --------------- I found the following infos: multiline datagridview cells? ... http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=4334 DataGridViewCellStyle.WrapMode Property ... http://whidbey.msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/P_System_Windows_Forms_DataGridViewCellStyle_WrapMode.asp Sizing Options in the Windows Forms DataGridView Control ... http://msdn2.microsoft.com/library/74b2wakt(en-us,vs.80).aspx --------------- This example works for me, but does anyone have any suggestion for improvement? dgv.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells; DataGridViewCellStyle cellStyle = new DataGridViewCellStyle(); cellStyle.WrapMode = DataGridViewTriState.True; dgv.Columns["LongText"].DefaultCellStyle = cellStyle; Greetings Gordian Tag: How to lock CheckState in CheckedListBox? Tag: 89992
  - 20
    - Not sure of the subject... I have an app that allows users to supply custom values for various calculations; about 43 of them. I use checkboxes to identify the use or lack there of, of a custom value. I need to be able to tell when the check state changes. Instead of coding for each one of the 43 check boxes and text boxes, I'd like to have one sub that checks. I thought I would just add the name of the textbox to the checkbox tag and ctype it but I get an invalid cast exception. Here's what I am trying to accomplish: Private Sub chkFlightBlock_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkFlightBlock.CheckedChanged, ...., ...., chkAnotherCustom Dim ctl As TextBox ctl = CType(sender, CheckBox).Tag ctl.Enabled = CType(sender, CheckBox).Checked If CType(sender, CheckBox).Checked Then ctl.BackColor = System.Drawing.SystemColors.Window Else ctl.BackColor = System.Drawing.SystemColors.Control End If End Sub In essence, I'd like to store the name of the textbox in the checkbox and handle my code in one area instead of many different subs. Any help would be great. Thanks, Brian Tag: How to lock CheckState in CheckedListBox? Tag: 89990
  - 21
    - How to run method on Form Load? The method I want to run when my (Windows Forms app) form loads is an event triggered by a radio button selection: private void optColors_CheckedChanged(object sender, EventArgs e) But when the form is loading, there is no sender - so the below code fails: RadioButton opt = (RadioButton)sender; //exception if (opt.Checked) { string strOpt = opt.Name; setCbo(strOpt); } What I need to do is somehow check if the sender is there, and if not, set strOpt to a default value - something like this: if (sender) //pseudo code { RadioButton opt = (RadioButton)sender; } else { //code to run on Form Load only RadioButton opt = this.optColors; } if (opt.Checked) { string strOpt = opt.Name; setCbo(strOpt); } How do I check for a valid sender? Do I check for EventArgs e instead? Thanks in advance. Tag: How to lock CheckState in CheckedListBox? Tag: 89983
  - 22
    - Validating grid data Hi, I am using the winforms datagrid and want to validate the data in the cells as I leave them. If the data is invalid I want to notify the user and focus him back on that cell. I have a number of textbox columns and one combobox column. I configured those fine with the column grid styles and have validation code hooked up to them. My problem is getting back to the cell that was just validated. I use the CurrentCellChanged event to capture the cell change but the CurrentCell property indicates the new cell. I would like to set the focus back to the cell that failed validation but I can't seem to figure out where that information might be saved. I can kludge the recording of the cell prior to the cell change, but it isn't convenient. Also, the validation event doesn't get triggered unless the column changes. Is there a way to get the validation event going in this case? I'm brute-forcing a call to it from the CurrentCellChanged event. It seems to me that there must be a better way. Thanks in advance for all your help. -George Tag: How to lock CheckState in CheckedListBox? Tag: 89982
  - 23
    - REPOST - How to Detect Windows is in Fullscreen Mode? I still haven't found an answer for this. I'd thought I'd try the group again. I have a system tray app that makes visible a windows form based on a timer. I want to override the timer and not have the windows form pop up if a user is in full-screen mode, i.e. a Powerpoint Presentation or a full-screen video. Does anybody know how my application might detect when the user is in full-screen video mode? Other popular windows programs do this effectively, like the Outlook incomming message pop-up and Instant Messenger. Thanks in advance. Tag: How to lock CheckState in CheckedListBox? Tag: 89981
  - 24
    - ClickOnce after MSI Deployment I have a customer who wants to leverage ClickOnce for a WinForms app deployment from an IIS server. Some of their users are remote and only occasionally connected to the internet. As a result, they would like to have an alternate MSI installer for the app for those users who cannot get to the IIS server. My question: is there any way to take an app that is deployed via MSI and then point it at a ClickOnce publication after the fact? (and be brought up to the latest version of the published app?) Thanks, -- Darren Shaffer .NET Compact Framework MVP Principal Architect Connected Innovation www.connectedinnovation.com Tag: How to lock CheckState in CheckedListBox? Tag: 89980
  - 25
    - Drag drop is driving me INSANE! Why is it that: e.Data.GetDataPresent("WindowsForms10PersistentObject") returns true, and e.Data.GetData("WindowsForms10PersistentObject") returns null? Is it Friday yet? Tag: How to lock CheckState in CheckedListBox? Tag: 89977
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  - 1
    - VB.Net Calling VB Form Hello All, I have a application that has a VB.Net form with search text box, a listview and a button. Once the user clicks on a button, it will populate the listview with some results. Once the user double clicks on a result, it will open up a VB6 form. The form is still VB6 because the .Net piece is not written yet. Anyways, the VB6 form has a "Tab Control" on it. Here is my problem. Once I click on the tab control on my VB6 form. Then if I click back to the .Net search form using the bottom task bar. Once I try to enter in a new search. My VB6 form will set focus back to itself and appear on top. Any Suggestions!!!!! Thanks, Mark Tag: How to lock CheckState in CheckedListBox? Tag: 89975
  - 2
    - OnClosing event doesn't close form Hi Group, I raise OnClosing event in a handler of a menu item. It invokes the OnClosing registered delegate but it doesnot close the form. But if i click on the close icon [X] of the form it invokes the OnClosing registered delegate and then closes the form. Can anyone help why same event handler (OnClosing) have different behaviour when invoked from code or clicked on from close button [X]. // Following is the menu event handler raising OnClosing event. private void miExit_Click(object sender, System.EventArgs e) {base.OnClosing(new CancelEventArgs(false)); } Thanks. Tag: How to lock CheckState in CheckedListBox? Tag: 89972
  - 3
    - Command Line Paramater Is there a way to add a paramater to opening the application? For instance. If I have a windows form that will modify a registry value, and I'd like to set it up so that it either closes after it runs, or it stays open. What I'd like to do is add a paramater to the command line that will indicat this. Like: c:\editreg.exe -close and the "-close" paramater would be passed into a variable somehow that would allow me to program it so that the program would automatically close when it's finished running... Any other ways I can accomplish this? Tag: How to lock CheckState in CheckedListBox? Tag: 89969
  - 4
    - UI Cues not updating in designer Got a custom container control that contains other custom subcontrols that have a custom designer. The subcontrol's designer has a couple verbs that fire off events that changes the order of that subcontrol in the parent custom control. It's another version of the collapsible panel bar, where in designer you can right click on a panel and move it up or down in the panel bar. The problem I'm having is that when I move a panel, the UI cues don't get updated. The panels will move, but the selection highlight will not move with the panel. It appears that a different control is selected than actually is. Clicking on a different panel will update the cues (except when you click on the control that is highlighted incorrectly -- the cues already indicate it is selected, so no change appears to have been made). I can't find any information on how to refresh the cues. I've tried Invalidate and Refresh in the custom container control, but they don't work. TIA. Tag: How to lock CheckState in CheckedListBox? Tag: 89966
  - 5
    - how to add editable unbound checkbox to windows form bound datagrid I need to add an editable unbound checkbox to a windows form bound datagrid using vb.net. Help! Tag: How to lock CheckState in CheckedListBox? Tag: 89965
  - 6
    - Asynchronous Drag and Drop I am trying to implement Asynchronously Drag and Drop from my windows application developed in c#. I 'd like a behavoir like winzip i.e. : when I drop on the target (a folder or the desktop) my file is not yet available and I want to start an asynchronous filetransfer managed from my application. At the end of this transfer, the drop target take the control and call the dodrop method and store the file. >From MSDN (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/programmersguide/shell_basics/shell_basics_programming/transferring/datascenarios.asp) I understand that this scenario is possible with a class that implement IDataObject and IASyncOperation interface. .NET give us the DataObject class that implement IDataObject but I can't find nothing about IASyncOperation (it isn't in shell32.dll). How can I implement it? Anyone has suggestions? Why it's so hard to find example about asynchronous D&D in .NET Thanks Tag: How to lock CheckState in CheckedListBox? Tag: 89959
  - 7
    - Problems with Simple DataBindings I've got problems with databindings in a windows forms application. I've wrote a component with a class (Article) with a public method (GetArticlesByRef) that returns a typed Dataset. This is the method: Public Function GetArticlesByRef(ByVal pRef As Integer) As dsArticles Dim strSQL As String = "SELECT * FROM Articles WHERE ART_REF = @Ref" Dim con As New SqlConnection("Data Source=(local);Integrated Security=SSPI;Initial Catalog=eShop") Dim cmd As New SqlCommand(strSQL, con) cmd.Parameters.Add(New SqlParameter("@Ref", SqlDbType.Int, 4)) cmd.Parameters("@Ref").Value = pRef Dim da As New SqlDataAdapter(cmd) da.TableMappings.Add("Table", "dsArticles") Dim ds As New dsArticles da.Fill(ds) Return ds End Function In the windows forms i've added a typed dataset (dsArticles1), two TextBox and one button controls. In the first textbox the user enters a ref code. The second textbox is binded to the olumn ART_DESCRIPTION of the table Articles in the Dataset. Next is the code of the click event of the button: Dim art As New Article DsArticles1.Clear() DsArticles1 = art.GetArticlesByRef(Ctype(TextBox1.Text, Integer)) When I run the application, the bind doesn't work. It Only works if I add a typed Dataset to the form and i load it from a SQLDataadapter. The problem is when i use a component. Thanks in advance. Tag: How to lock CheckState in CheckedListBox? Tag: 89956
  - 8
    - NotifyIcon stays at sys tray Hi All, Does anybody found a way to remove the notifyIcon form the systemTray after the program has closed!? Mine is stay on the sysTray and is removed after the mouse pointed at it. thx in advance Tag: How to lock CheckState in CheckedListBox? Tag: 89950
  - 9
    - Form validation problem Hi, i'm trying to force validation of each control in a form by setting focus explicitly on each control prior to calling this.Validate(). The idea is to ensure that the data is validated when the user presses the ok button on the form. The problem is that setting focus on some controls alters the state of the control. For example, setting focus on radiobuttons sets the checked state to true. Is there anyway to force control validation without altering the state of the control? I saw one eample using reflection, forcing the control's validation event to occur, but i dont want to reflect into the private methods of the .net framework for future compability. Tag: How to lock CheckState in CheckedListBox? Tag: 89948
  - 10
    - MDI Parent and MDI child.. This is a multi-part message in MIME format. ------=_NextPart_000_004B_01C586DE.477E04F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello groups, I have few questions, please do assist me to solve this queries... Assuming i'm using VS2005 beta 2, C# q(1). I have MDI parent and MDI child window. I have placed tools menu = in MDI parent which is containing a list of items say imagesharp, = imagecontrast etc....if i click imagesharp of MDI parent, i have to = sharp the image in MDI child. How i can communicate [ MDI Parent ---- > = MDI child ] ?? q(2). Wht are all the ways to access the MDI child member functions from = MDI parent class... ?? =20 q(3). Using this.activechild to get the current active child window, but = do know how to pass an event or variables from MDI parent to that = current active child...??? --=20 M=E4h=E9sh Kum=E4r. R=20 ------=_NextPart_000_004B_01C586DE.477E04F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2800.1400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2>Hello groups,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I have few questions, please do assist = me to solve=20 this queries...</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> <DIV><FONT face=3DArial size=3D2>Assuming i'm using VS2005 beta 2,=20 C#</FONT></DIV></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>q(1). I have MDI parent and MDI = child window.=20 I have placed tools menu in MDI parent which is containing a list of = items say=20 imagesharp, imagecontrast etc....if i click  imagesharp of MDI = parent, i=20 have to sharp the image in MDI child. How i can communicate [ MDI Parent = ----=20 > MDI child ]   ??</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>q(2). Wht are all the ways to access = the MDI child=20 member functions from MDI parent class... ??</FONT></DIV> <DIV><FONT face=3DArial size=3D2> </FONT></DIV> <DIV><FONT face=3DArial size=3D2>q(3). Using this.activechild to = get the=20 current active child window, but do know how to pass an event or = variables from=20 MDI parent to that current active child...???</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>-- <BR>M=E4h=E9sh Kum=E4r. R=20 <BR></DIV></FONT></BODY></HTML> ------=_NextPart_000_004B_01C586DE.477E04F0-- Tag: How to lock CheckState in CheckedListBox? Tag: 89944
  - 11
    - No-Touch Ent Lib I am getting an error with no touch deployment using Enterpise Lib. in my project. The error is: Invalid section name. The section 'dataConfiguration' does not exist in the requested configuration file myapp.exe.config or machine.config. Make sure that the 'enterpriseLibarary.configurationSections' configuration sectino exists in tone of the files and that th esection 'dataConfiguration' is defined'. It is defined I just think it may not be copying down the dataconfiguration.config file. Has anyone else run into this or have any insight on how I would attack this. Thanks for your help! Jerry Tag: How to lock CheckState in CheckedListBox? Tag: 89937
  - 12
    - CreateInstance How expensive is CreateInstance for example..... ISomeInterface isomeType = Activator.CreateInstance(someType) as ISomeInterace; and if it is not that expensive is there anything to watch out for if i use it -- Message posted via DotNetMonster.com http://www.dotnetmonster.com/Uwe/Forums.aspx/winform/200507/1 Tag: How to lock CheckState in CheckedListBox? Tag: 89935
  - 13
    - Single instance of an app I'd like to prevent my app from running more than once. In VB6 this was simple using PrevInstance. MSDN Library describes using Diagnostics.Process.GetProcessByName to see if the the currently running thread has another instance running. Works great as Adminstrator but throws a SecurityPermission exception when run from a Windows account that only belongs to BUILTIN\Users. Is there a simple way to do this? Tag: How to lock CheckState in CheckedListBox? Tag: 89932
  - 14
    - I need a basic grid type control - not a data bound bloated control I'm at a loss to figure out how to use VB NET to create a simple, unbound grid - style Windows control to display data. I'm not interested in data- binding, sql, or OLEdb. I just want to define the size of a two dimensional grid, be able to populate it programmatically, and have it return click events when I click on a cell. Is this too much to ask for? Tag: How to lock CheckState in CheckedListBox? Tag: 89931
  - 15
    - Resolution? I have a strange bug that I can't seem to figure out. I have a VB.Net application that is deployed on 100 different computers. On two of the machines the controls on one of the forms seem to "hang" off the edge of the screen when the form is maximized. The window resizes itself perfectly fine when maximized but the controls in the form itself seem to think the form is bigger and hang off the edge of the screen and can not be reached. Changing the monitor resolution does not solve this problem. Now, keep in mind, only two of the deployments are having this problem. Every other machine that uses the application resizes the controls properly. Has anyone experienced this before? Any ideas would be extremely helpful as I've tried a LOT of different things that do not work at all. Tag: How to lock CheckState in CheckedListBox? Tag: 89929
  - 16
    - how to add editable checkbox bound datagrid I've seen similar questions asked but no answer. I need to add an editable checkbox to a bound datagrid using vb.net. Help! Tag: How to lock CheckState in CheckedListBox? Tag: 89927
  - 17
    - More questions about client areas Similar situation to other posts, but I hope I can get a better answer to mine. I have a control derived from System.Windows.Forms.ContainerControl. I do all my own painting. Consequently, the area that I wish to allow users to place controls is smaller and has a different location than the ClientRectangle. Setting the ClientSize doesn't work, as this only changes the size, not the origin. ClientRectangle is read only, and cannot be overridden. DisplayRectangle can be overridden, but it only affects child controls that are docked. If they are just anchored, they can still be placed outside of the DisplayRectangle. Essentially, all I want to do is what could easily be done by changing the size and origin of the ClientRectangle. Right now, the only way to do it is to override the OnLayout event and make sure the control is within the correct area. is there a simpler way? And if not, why can't ClientRectangle be overridden? Tag: How to lock CheckState in CheckedListBox? Tag: 89925
  - 18
    - About that new app.config Hi, I just started looking at this new typed app.config in Visual Studio 2005 and I must admit I'm very confused. I Googled quite a bit to find more information but could not found anything usable. I have a few questions and I appreciate if some of you could take the time to answer them. 1. How do I encrypt connection strings in Windows Forms apps. I read that it can be done automatically for ASP.NET apps, but this feature seems to have been left out of WinForms. Am I right? Do I need to manually code this or there's an automated way? 2. It seems that the config file is stored in a path that ends with the version number of the application (ie: c:\......\v1.0.0.0). What happens if users upgrade to v1.0.0.1 for example? Will they lose all their settings? How can I prevent this from happening? Can I store my app.configs in a version independent path (user settings and application settings)? 3. How can I access my UI project's settings from class libraries (other assemblies)? 4. How is app.config deployed with ClickOnce? 5. Why is Visual Studio 2005 creating app.configs for all the projects of my solution? It doesn't make sense to me, it should only create one for the UI project. Maybe this is a beta bug? Thanks a lot for your help and time! Carl Tag: How to lock CheckState in CheckedListBox? Tag: 89924
  - 19
    - Filled in rectangle Hi, How can I draw a rectangle in which the "pen" color is black yet the fill (or "brush") color is blue? Isn't there a way to do this with only one call to g.[Draw|Fill]Rectangle? Thanks, BT Tag: How to lock CheckState in CheckedListBox? Tag: 89923
  - 20
    - Client specific localization I've read a lot about language localization, but I'm not sure how I can apply all of that to the following problem. I have an application that I would like to "brand" for various clients. Some bitmaps and icons, labels throughout the application, etc. I would like to be able to deploy the same application at each client, and then create a unique resource file for that installation. This would also allow me to update the application and resources separately as needed (with some care to handle new resources). If possible, I would like to embed the default localization in the main app itself (so that the app could run without any external resource). If this was localization for different languages, I think I understand how to do that. To do that for the same language and just different installations, I just don't get it. Any help is much appreciated, JR Tag: How to lock CheckState in CheckedListBox? Tag: 89921
  - 21
    - Using Tab Control In my application, I'd like to have a tab control with say, 5 tabs. However, I only want to change which tab is displayed through code; in other words, the tabs are not visible to the user (disabled is not an option). Is this possible? If not, any suggestions are welcome to mimic this behaviour. If it makes a difference, I'm using WindowsForms with Managed C++. Thanks! Gary Tag: How to lock CheckState in CheckedListBox? Tag: 89920
  - 22
    - Trying to call jscript file from Winforms code I have some C# code and I am trying to get a .js file to execute, but I get an error 'Thje system cannot find the file specified'. Here is the line that I am trynig to execute: Process.Start("cscript " + "\"" + Application.StartupPath + "\\" + "MyFile.js \""); For testing, I have placed the file in my bin/debug folder. Any ideas on this would be much appreciated! Tag: How to lock CheckState in CheckedListBox? Tag: 89917
  - 23
    - ConvertFrom never gets called even I defined CanConvertFrom Hello, I am tring to define StringArrayConverter, need to do extra validation to the input strings. But ConvertFrom() method never gets called, I am not sure what is worng with the code. public class StringArrayConverter : TypeConverter { public override bool CanConvertFrom(ITypeDescriptorContext context, System.Type sourceType) { if (sourceType == typeof(string)) return true; return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom( ITypeDescriptorContext context, CultureInfo culture, object value ) { string s = value as string; if ( s == null ) return new string [0]; return s.Split( '|' ); } } public class Data { [TypeConverter(typeof(StringArrayConverter))] public string[] StringArray { get { return mStringArray; } set { mStringArray = value; } } private string[] mStringArray; } Anyone? Tag: How to lock CheckState in CheckedListBox? Tag: 89916
  - 24
    - Capturing mouse, key events Hello, I'm trying to modify a C# sample app (Scribble) such that the user can draw w/o holding the mouse button down -- first mouse click turns on drawing, moving the mouse draws, and the second mouse click turns it off. In the MouseUpHandler, I set the Capture property: this.Capture = true; Some TRACE output in the MouseMove handler shows that when the cursor leaves the mdi child window, it stops getting the mouse messages. Also, after setting Capture to true in the mouseup handler (after calling base.OnMouseUp()), Capture is _false_ in the mousemove handler. While I'm just experimenting with this app, eventually I'll be drawing rubber band shapes and I need to have the rubber band drawing track with the mouse, even when it is outside the client window. Is there a way to accomplish this? Also, when a window has 'captured' the mouse, should it get all the keyboard input as well, or does something else need to be done? For example, in a differnt app, when I am drawing a rubber rectangle with the mouse button held down, my shortcut key to bring up the Open File dialog still works. TIA for any ideas. Tag: How to lock CheckState in CheckedListBox? Tag: 89915
  - 25
    - Breakpoints not working multi project solution Hi, I have a solution which contains 3 projects. (The main GUI, a WebBrowser component and the Cassini web server). Occasionally an exception will occur in my application. I cannot narrow down where the exception is occuring because VS.NET says "no source code is available for this location" (or similar). Why is VS.NET not available to debug all parts of the application? It seems that I also can't set breakpoints in the other projects - they are just ignored. All my projects are set for debug build and PDB files are generated when I compile. Could it be because parts of the code are executing in a separate thread? Can VS.NET not debug multi-threaded applications? An example of a project I'm having this issue with is the sample code here: http://www.microsoft.com/belux/nl/msdn/community/columns/desmet/hostaspnet2.mspx Any help on this would be greatly appreciated. Thanks, Nick... Tag: How to lock CheckState in CheckedListBox? Tag: 89912

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

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RE: How to lock CheckState in CheckedListBox? by Shariq

Shariq
Thu Jul 14 11:49:05 CDT 2005

You could use the ItemCheck property of the CheckedListBox control

Private Sub MyCheckList_ItemCheck(ByVal sender As Object, ByVal e As
System.Windows.Forms.ItemCheckEventArgs) Handles lstLabelTypes.ItemCheck
if e.CurrentValue=1 then
e.NewValue=1
end if

"Vagabond Software" wrote:

> 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
>
>
>

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Re: How to lock CheckState in CheckedListBox? by Vagabond

Vagabond
Fri Jul 15 09:48:57 CDT 2005

"Shariq" <Shariq@discussions.microsoft.com> wrote in message
news:B030F19D-45FE-4C22-81F5-E60549FB21B8@microsoft.com...
> You could use the ItemCheck property of the CheckedListBox control
>
> Private Sub MyCheckList_ItemCheck(ByVal sender As Object, ByVal e As
> System.Windows.Forms.ItemCheckEventArgs) Handles lstLabelTypes.ItemCheck
> if e.CurrentValue=1 then
> e.NewValue=1
> end if

Thanks, that works with one caveat. The ItemCheck event fires even when
programmatically changing the CheckState. So, I also added a private bool
(checkStateLocked) that I could change when I want to alter the CheckState
programmatically. So the ItemCheck event block looks like this:

if (checkStateLocked) then
e.NewValue = e.CurrentValue;

Thanks again for your help.

Regards,

carl

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