Windows Forms

Page 1797




  • Topics
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  • using me.validate
    by JohnJDB
    4 Replies
    Last post by JohnJDB
      • Hiya, I've got a bound form where I'm trying to validate input before the user moves off the record. Whats the best way to do this Looking that the save sub I see it calls me.validate. Private Sub TblSitesBindingNavigatorSaveItem_Click( ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TblSitesBindingNavigatorSaveItem.Click
  • Problem with ToolStripDropDown in DataGridViewCell
    by dyowee
    4 Replies
    Last post by ZW2
      • Good day to all! =) I tried to follow the example here http://blogs.msdn.com/jfoscoding/archive/2005/03/03/384430.aspx for hosting a treeview in a DataGridViewCell. The problem is that if the treeview has focus, clicking on the dropdown button once does not close the dropdown. I need to click it again to successfully close it. I hope you can help me out. Thanks.
  • DataSet with internal visibility
    by JocularJoe
    2 Replies
    Last post by JocularJoe
      • When creating a typed DataSet using the VS2005 designer is it possible to specify that the generated DataSet classes should have internal visibility
  • DotNetrix question
    by AlexBB
    6 Replies
    Last post by AlexBB
      • This question should be addressed directly to Mick Doherty, a great guy who helped me to set custom tabPage control in motion. Mick hi, Your tabControl has been doing quite well in my major application. 6 weeks ago I had to switch to Vista and that caused innumerable problems in various areas but your TabControlDontNetrix survived the transition unscathed.
  • how to save the content of richTextBox as jpg file?
    by Rush hour
    12 Replies
    Last post by Deecke
      • Dear all, I looked through the website for the information about saving content of richTextBox as jpg file. E.g. there are some lines and some words in the richTextBox, and I wanna save them as the jpg file. However, it seems workless. Can you give me some hints Thanks in advance, Cordially, B-D
  • DataGridView - Column/Cell Not Selectable
    by Grant Jenkins
    5 Replies
    Last post by gjen020
      • Hi, I have a DataGridView with 5 columns but only want the user to be able to select cells in one column (prevent selection of the other cells) I have tried to find a property for a column to say you can't select it, but can't find anything. Surely you don't have to write a whole bunch of event handlers (cellclick, keydown, etc) and dynamically change the focus to the one columns cell you al
  • Email validation control or code for VB.Net 2005.
    by Harsh585762
    12 Replies
    Last post by raj_login
      • I am developing a windows application using VB.Net 2005. One of my forms contains a textbox for entering email id. I want to validate its patterns i.e. It should have @, atleast one ".", etc. In asp.net we have validation control for this. But how to do it in VB.Net 2005.
  • round buttons
    by Michael_001
    2 Replies
    Last post by Microsoft IT Advisory Council
      • Hello i have made my one version off the musicplayer butt i don't like the way it looks for now. Different colors is nice butt i want different buttons like round ones or triangle ones i already try the codes i can find butt always erors is it because i am ussing VISTA or something else i don't no inheritance properties am not so good. can't find video to see and l
  • Memory Leak using FlowLayoutPanel?
    by Bryan Brannon
    1 Replies
    Last post by nobugz
      • I have a problem with a possible memory leak in my WinForms app. I finally was able to figure this out and reproduce by doing the floowing. Add a FlowLayoutPanel to a form and have a process that adds (multiple) Buttons at runtime. Then i have a method that is called from an event (button click) that removes the controls like this: Code Snippet Me.FlowLayoutPanel1.Controls.Clear
  • Form doesnt return after ShowDialog when runs standalone. C# 2.0
    by maxima
    1 Replies
    Last post by maxima
      • If I run app from IDE it works fine. When I run it standalone from command string one particular dialog window hangs on 2nd (sometime 3d) time you closing it. The sequence of events I could manage to trace so far: - when it is OK a. Cancel button clicked event b. form Closed event c. form HandleDestroyed event d. ShowDialog returns to the parent e. form Disposed m
  • Getting string from Text Box
    by JessieErin
    7 Replies
    Last post by ZW2
      • Hi, I have some code I'm updating from VB6 to VB .NET and am having an annoying problem. I'm trying to assign a public variable to a string coming from a text box. The first time through the sub there is no problem but when the sub is called again the variable is assign a zero length string, even though there is still text in the text box. I can get the correct string if I assign an intermediat
  • Form closing preventing
    by Kapalic
    4 Replies
    Last post by Frank Carr
      • How can I prevent an user to close the form clicking on the (X) button Thnx! Kapalic
  • At runtime, what else controls windows controls' size/proportion besides windows' resolution?
    by Feng26
    5 Replies
    Last post by Karthik Krishnaswami
      • Hi, We have a Win form app written in VB.Net. One of the issues we have now is that the size/proportion of the win controls differ from workstation to workstation and that is NOT because of the windows resolution! (all the workstations have the same 1024x768 resolution). As result of this, about 70 percent of our workstations display the controls the way we want, but the rest 30 percent
  • how to disable row select in datagridview?
    by Jassim Rahma
    2 Replies
    Last post by Gavin Jin - MSFT
      • how can disable the row select in the datagrid to prevent user from highlighting a row
  • multiple c# winforms
    by rautchetan
    6 Replies
    Last post by rautchetan
      • I have two winforms one is parent form and other will open when user click button which place in parent form. I want when child form get display,parent form get close.means on that button event i want to close parent form and open child form... plz help me Thanks, Chetan S. Raut.
  • Capture keystrokes inside a UserControl
    by MEder
    1 Replies
    Last post by nobugz
      • Hi, I'm about to implement a UserControl that has several other controls inside. As soon as a control inside the my containing UserControl I want to react on keystrokes (like Ctrl+A to select all controls inside). How can this be accomplished Thanks in advance!
  • Autocomplete in a combobox of a DataGridview
    by AR SOFT Informáti
    2 Replies
    Last post by tec-goblin
      • As I can make a autocomplete  in a combobox of a DataGridview.  I observed that in the properties of the compo of the combobox has an AutoComplete = True, more no   he/she works as of the combobox of the form that has the options autocompletemode =   SuggestAppend and AutoCompleteSource = ListItems.  and I don't Also get to type other thing not to be it that this
  • DownScope control on form
    by Dan Piessens
    0 Replies
    Last post by Dan Piessens
      • Let me preface this by saying that I know downscoping is a bad thing to do in C# or any OO language, but here's the issue: We have a number of ComboBox controls on a form that get dynamically loaded. We've run into issues where the list has 65,000 entries and it takes to long so we change the DropDownStyle to Simple (essentially creating a textbox) and use a lookup mechanism in our applica
  • start up logIn from then start up form windows
    by tds01088
    2 Replies
    Last post by boban.s
      • I have problem with login form starta up and then after Buttn click do form start up
  • Creating my own TabPage class
    by malj
    7 Replies
    Last post by IsomerX
      • I have a tabcontrol on a form. If I add tab pages and add controls to them in Visual Studio the controls become members of the main form and the main form will also handle all events from all controls on all tab pages. I want to create my own TabPage class that handles everything that happens in the TabPage to avoid having all code in the main form. I created MyTabPage class by adding a new Com
  • Querying Errorprovider
    by uwcodeman
    2 Replies
    Last post by uwcodeman
      • Hi all, Does anybody know if I can query errorprovider / control to check if it has an error So, if I set error on myControl like so: _errorProvider.SetError(myControl, errorMessage); Can I programmatically determine if myControl has an error associated with it
  • "Application settings" versus "Isolated Storage"
    by Parker Lewis
    3 Replies
    Last post by nobugz
      • Hello everybody Could someone explain me when you'd typically use the new. .NET 2.0 "Application settings" feature and when you would use the "Isolated storage" Both support a user scope, thus what's the real difference Any links to continuative articles would be appreciated. Kind regards
  • How Can I handle Mouse events over a Form with Trancperancy Key ?
    by informat
    10 Replies
    Last post by informat
      • Hi : I had a Form and I put the property Transparency Key to "Control" so some of the form will be hidden .... but I still want to handle User Mouse Clicks on the hidden part of the form ... How Can I thanks ...
  • Print Preview button on Print dialog box
    by Krunal Doshi
    3 Replies
    Last post by Chunsheng Tang - MSFT
      • Hi, My application requirement is that I need a print preview button on my standard Print dialog box in C#.Net. (Which it does not have by default). Can I do that How regards, krunal
  • List box - flickering problem
    by Michael Vainer
    6 Replies
    Last post by Michael Vainer
      • Hi, I'm using the listbox control to display colored messages. for that purpose i set DrawMode to be DrawMode . OwnerDrawFixed and added a listener for Draw item event as following: Code Snippet private void lbxLog_DrawItem ( object sender , DrawItemEventArgs e ) { if ( e . Index < 0) { return ; } string displayedItem = lb