I'm going Mad! Has anyone been able to give a UserControl a transparent Background I've tried... this.SetStyle(ControlStyles.SupportsTransparentBackColor, true); this.BackColor = Color.Transparent; this.UpdateStyles(); .... but it does not work. ...more >>

Hi, I'm desperatly trying to find how I can use drag and drop for an Outlook 2003 msg towards a VB.Net Windows application. Normally you should use Dim theSteam As Stream = CType(e.Data.GetData("FileGroupDescriptor", True), Stream) to capture the filename (which works great) and use Dim ms ...more >>

In the course of writing my application, I have come across several = issues that seem to be Microsoft bugs. Following is a summary and possible workarounds. Jeffrey Tan, if you are reading this, please verify. Also, I'd like to know how to request fixes for these issues. 1) Sometimes the...more >>

I'm trying to close a form in C#. I have a vb background, so the question may sound dumb. In vb it is just me.close(). I've tried a bunch of ways to close the form but C# is acting pretty dumb also. I can't find a way to close it. Here are some of the things I've tried: private void...more >>

I would like to create a custom container control which can scroll its child controls. I know that the AutoScroll property of ScrollableControl can mimic this functionality, but AutoScroll causes some behavior which is EXTREMELY obnoxious to my users, and I haven't been able to find a workaroun...more >>

Good Morning, I am developing an Outlook Shared Add-in using VB.Net. A Windows form has been added to the project, but is not reading the values in the app.config file during testing. The code (Sub Main) is below and displays "Blank connection string" is the label. It is called by an Outlo...more >>

I need some help please. Say you have a DataGrid and a DataSet, and you create a dataview to handle sorting and filtering and then you assign the dataview to DataGrid.DataSource. Once you did that you will get InvalidCastException if you do this: DataSet dataSet = (DataSet) dataGrid.Data...more >>

Hay there, I'm writing my own DataGridComboBoxColumn because .NET 1.1 does not have one (I hope .NET 2.0 supplies one). I based it on this article: http://msdn.microsoft.com/msdnmag/issues/03/08/DataGrids/default.aspx I have a problem when there are two DataGrid's on one form, and when I ...more >>

I have a splash screen that is displayed as the application starts. The splash screen has text dynamically added to it to indicate the authorisation mechanism and start-up progress. Due to the nature of the splash screen graphic we have to draw the text onto the splash screen instead of assign...more >>

Hi, I've programmed a simple form having some panes and one button. There is a basic thing I can't find a solution for: 1) I gave the button a TabIndex of 0. The main pane has a TabIndex of 1. Still the button doesn't get the focus when the form opens. Why? I tried to give f...more >>

I'm building a winforms app using vb.net 1.1 and have 3 basic tiers on the client side. the UI, BLL and DAL. Currently everything is in one project and at some point I'll parse it out to a separate project for each Tier. Currently the startup object is Sub Main in the form called frmMain. ...more >>

This might be a simple question, but I havent found a solution anywhere: I do some stuff, and fill a DataSet from a database. After the tables have been processed (rows inserted/deleted/updated) I want to write the DataSet back to the database. My DataTable shall replace the table in the ...more >>

HI I try it code only creat DNS ResourceRecord,How to creat dns zone? thanks! this code: public void CreateRR(string zoneName, string rrTextRep) { if ( zoneName == null ) throw new ArgumentNullException("zoneName", "zoneName is null."); if ( rrTextRep == null ) thro...more >>

Hi There is a databound grid that is being used in one of my Master - Detail form there I need to keep two columns hidden and assign Autogenerated values once a user adds a new record through the grid. can somebody please tell me how to do this; as i couldn't find a single event that is fired on...more >>

Hello, I have a form with a notifyicon. I have set ShowInTaskbar to false. When I minimize the form, the form minimize, but there is a symbol on the windows desktop for the minimized form. This symbol is the same as for child windows which are minimized to its mdi-form. What I make wrong. T...more >>

Despite setting controlbox property to false, CTRL+F4 shortcut is still working. Anyone can help me to disable CTRL+F4? Raj kumar...more >>

What is the best practice Trim (myStringvar) or myStringvar.Trim thks...more >>

This problem occurs on Windows 2000 but NOT on Windows XP: If you programmatically remove a control from the Controls collection of a panel on another form, then that form's default WndProc will return FALSE to the WM_QUERYENDSESSION message! Is there anything that can be done to fix this ot...more >>

I have a non-delimited fixed-field text file with a record length of 5919 bytes long that I need to load into an existing empty dataset with 159 columns. Currently I am building a mapping like this: Do While sr.Peek() >= 0 dr = dt.NewRow dt.Rows.Add(dr) Dim nLine As String...more >>

Hi, In order to display multiple lines in a column, i am creating creating a new column style deriving from the DataGridTextBoxColumn. To get the height of each row i am using the following code in one of the methods of this custom columnstyle class. MethodInfo mi = t.GetMethod("get_Dat...more >>

Any help will be really appreciated. When I use XmlNodeList nodeList; XmlElement root = doc.DocumentElement; nodeList = root.SelectNodes("/bookstore/book"); to select nodes matching the XPath string, from XML file below, I get one node which is OK. BUT, if I remove the ":bk" f...more >>

Hi All, Is there a way to find out, on the leave-event, which control that is about to receive focus? Rgds Egil Winther ShipNet AS ...more >>

I stripped off the frame from a window but I still want the user to be able to move it. If the user click on the background and moves the mouse around I have some code that hooks into that and does the move but the window keeps trying to redraw itself and it greats really crazy. Is there an ...more >>

Hi, I've modified the Windows application icon (App.ico) and now I can't see it when the application is in runtime and especially I cant't see it as icon of the file myapplication.exe... What should I do to restore the situation? I precise that in Visual Studio, when I open App.ico, I can se...more >>

How can I display a balloon tooltip from a system tray icon?? I can find plenty of examples on how to do this from C++ or even Visual Basic by calling the Shell_NotifyIcon function, but I can't find how to do this from inside C#....more >>

i want to get the first name of the logged in user on the current machine, windows application i used the following code but i get System.NullReferenceException when it reaches the Console.Writeline line string myADSPath = "LDAP://myadelaide.com/CN=Users,DC=myadelaide,DC=com" ; Directo...more >>

Hi Everybody, I've got a strange problem: While searching the newsgroups for something else, I've come across a post that discusses a bug with restoring MDI child forms. (for any body who is interested, the post is in microsoft.public.dotnet.framework.windowsforms by Scott Abel, the title...more >>

Hi, I would like to use Form's AutoScroll property, but only partially. Everything is ok except scrolling when ActiveControl changes (the first part of "AutoScroll"). For example my code calls someControl.Focus() which results in scrolling even if the someControl is partially visible. Tab ...more >>

I have a DataTable with "FirstName" and "LastName" columns. How can I get my bound combo to show both these values as DisplayMember? Thanks! - Peder -...more >>

Hi, I've got the following problem with databinding: If I bind a column of a dataset e.g. on the Text property of a Textbox, everything acts as expected, i.e. if you don't make any changes to the text in the textbox, the rowstate of the bound row stays unchanged. On the contrary, when you...more >>

Hi, I need to to have a combobox column on the grid. The problem is when the user selects a value from the combo , when the user clicks the combo in another row i need to remove the previously selected value from the combo list. So the user has only the left available values to be selecte...more >>

I would to chand the default colors used to make a button look 3d. How do I do that in c#....more >>

I want to install my user control in the GAC, regasm it and run it in a browser without pulling the control from a web URL. This is possible and explained in the MSDN KB article 305624 http://support.microsoft.com/d=ADefault.aspx?scid=3Dkb;en-us;Q305=AD624 I tried this and it works fine ex...more >>

I have a .NET application which is targeted at both W2k and XP. My form's icons are XP style icons 32-bit. When it is running on W2k, the icons do not look correct. I understand that W2k does not support 32-bit icons with 8-bit alpha channels. My question is what can I do so that when my app i...more >>

Help!!! My program is working on other machines but no matter how much I try it won't work on one of them. Here is the coredump, any help is appreciated!!! Microsoft (R) Common Language Runtime Test Debugger Shell Version 1.1.4322.573 Copyright (C) Microsoft Corporation 1998-2002. All righ...more >>

I have a client that just bought new equipment. SP2 is installed as well as Norton Firewall. What are the steps I need to do to open up SQL server so they can access the server now? How do I find the port that SQL is running on is probably another Q. TIA __Stephen ...more >>

Hello, I set my DataGrid.AllowSorting to true but there is no sort event to do some processing! All I can think of is inside the click event which is not what I really want because click event occurs before DataGrid is sorted. Any comments? ...more >>

Hello, I have a DataGrid with one table in its TableStyle collection. The TableStyle collection contains a ColumnStyle of some columns with headers being visible. Is there a way to find out which column header is clicked other than calculating mouse cursor's position and checking it agai...more >>

how do you make all child forms part of the container? the container opens the form and it is a child (stays withing the container) but when the child opens a form it is free floating. is there a way to make the child's child stay within the container?...more >>

This post is for the Google crawler-- no reply is needed. I had a problem getting the Windows Forms Invalidate() method to work on a UserControl. Calling the method should force a repaint of the form, but the repaint wasn't occuring. The solution is to add a call to the Update() method imme...more >>

Hi, My C# library is not compiling anymore with express C# beta 2 because I was using MaskedTextBox.InputText. The new msdn documentation still references this property from the overview page of this control but does not contain the actual page for the property anymore. Is it a bug or has it...more >>

I've done a lot of reading about multi-threading (I come from a VB6 background so these things are new to me) but I can't find an example of my exact scenario. It's very simple, I've got a worker thread which needs to read the Checked property of a checkbox on a form. I gather that I can't...more >>

Hi, Could you, please, answer this: I have a panel control (with NO scroll (AutoScroll = false)) on whose surface I draw a Gantt diagram; I want to catch the WM_MOUSEWHEEL = 0X020A message but the panel refuses to catch that message; I tried with WndProc, with override OnMouseWheel... every...more >>

I am writing an application that draws text directly on the on the form surface. The App must run on both .Net Compact Framework and the Normal .Net Framework 1.1. I need to use Monospaced Font like Courier New (or FontFamily.GenericMonospace). It is very important that each character takes...more >>

I have an inherited form. The base class has some panels and a splitter for resizing them In the inherited form, I've placed some child controls in the right-panel. This all works fine, run the app everything looks great. Go back to form in designer, and now it won't paint the new child contro...more >>

Hi, If I add a menu (or context menu) to a component class by dragging it from the toolbox, it is added correctly but I can't find a way to edit it. The Edit Menu command appears in the context menu for the item but it doesn't seem to do anything. Thanks, Jeronimo Bertran ...more >>

Hello, The SelectedIndexChanged event of TabControl object occurs when a tabpage is selected. I need to do some processing when user selects a new tabpage but before the SelectedIndex has changed to the newly set tabpage index. I would call such an event SelectedIndexChanging which would...more >>

Hello Everyone, I need to print on pre-printed form from my VB.NET app. The form I am printing on has about 200 fields and each field needs to be justified seperately. CR for .Net isn't giving me accurate output. The CR is close, but a little off here and there and adjustments haven't w...more >>

Hello All, I am trying to load an icon file (.ico) into a PictureBox control using C# ..Net. This type of file worked fine under VB6. According to .Net documentation, it should work fine here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbconDisp...more >>

I'm getting started building a composite control, with my control being derived from UserControl. For some reason, my override of UserControl's OnLoad is being called four times for a single instance of my control. I haven't been able to figure out why this is. I had the same code implemente...more >>

Is there a way to check whether the current value in a NumericUpDown control is valid? Whenever I check the 'Value' property, it always automatically brings itself back within the limits specified by the Minimum / Maximum properties which makes it impossible to check the compare the value manu...more >>

Hi, I want to dispaly different forms in different tab pages of tab control. How can I do this? any help is appreciated. Regards, RbsnBph...more >>

Hi All, I am trying to write an application (an OOS exercise tool) that will periodically display a form in the foreground, and move back to the foreground every time it loses focus, or once every 1/10th of a second by a timer. The problem is that myForm.BringToFront() isn't working; the ...more >>

I display the print dialog using the ShowDialog() function. On the print dialog there is a properties button. I need to detect when this properties button has been clicked as i want to re-calculate the total pages possible to print as this value can change when moving between portrait + la...more >>

How do I bind a TextBox to a DataGrid? If I bind it to the DataGrid DataTable, the TextBox doesn't get updated when I select another row. Do I need to handle some DataGrid events? - Peder -...more >>

If i have a Sys Tray Application, with a ApplicationContext but with no main form - How can i then call methods that e.g shows forms ??? The problem is that because there is no main form, there is no methods like invoke ?? I found this q about it, but it does not solve my problem because in ...more >>

Hello I'm sure others have asked this before, now its my turn! Combo box with "DropDownStyle" is set as "DropDownList" Once a user selects a value, how can they select null again ? Or if there are 4 combo boxes on the form, once someone selects the first time and saves the data, all th...more >>

Is there any way I can access a cookie stored by a browser from a winform? Thanks, Phil...more >>

I'm working on the first non-trivial application written in C#/.NET, and I'm having to implement a lot of the framework that was provided in MFC. In particular, menu items and toolbar buttons would enable/disable/check/whatever automatically, as long as you handled the OnUpdateCmdUI message...more >>

Hello, Is there any way to disable highlight on selected cell in DataGrid ? I want to select entire rows and only rows in my DataGrid. DataGrid is readonly. I put that into my code : private void dataGrid1_CurrentCellChanged(object sender, System.EventArgs e) { dataGrid1.Select(dataGr...more >>

Hello All! Assume that we have a control which draws something on its background. I need to place some labels and checkboxes on this control. And how can I make the background of these controls to be transparent? I just want from label and checkboxes to display only text, but not its back c...more >>

How much and dangerous is the WindForm Timer for my application? Is it loding the memory while it is running? thks -- ...more >>

I'm interested in using .net windows forms controls (datagrid, etc.) in my app. My app, however, uses an embedded web browser control for its UI (for easier content authoring). Pages are loaded locally (using file:// urls). I've read examples of how to do this with IE and http protocol, but c...more >>

Could someone please help me converting the following lines of vb6 code to vb.net. The message box should display "1/3/2005" if it is executed today. Private Sub Form_Load() Dim nWeekNumber As Integer Dim ThisYearStart As Date ThisYearStart = YearStart(Today, 2) msgbox ThisYea...more >>

I have a custom DataGrid called BasicDataGrid : DataGrid and I have an internal variable that keeps track of the table styles, but this internal variable keeps serializing! Is there a way to prevent this object from serializing? Thanks, Dave ...more >>

How do you retrieve the visible clipping region for a control? I have a control where I do some on-screen drawing (specifically ControlPaint.DrawReversibleLine()), however I need to clip the line to the visible bounds of my control. Obviously, the client rect is simple enough to retrieve, ...more >>

Is there something that can change the TopMost=true status of a form to become false at a later time during running? My code only has the statments this.TopMost = true; A search for TopMost only finds these statements within #region Windows Form Designer generated code I am testing wi...more >>

hi, I am developing a windows form application in VB.Net that has a splash screen in the begining before the application loads the main form. To display splash screen i am loading splash form in the "main" sub in a seperate thread that periodically checks a static property "IsFormLoaded" of the...more >>

I'm doing some stuff with the Form's Opacity property. Basically I'm changing it's opacity to less than 100% when it's being moved, and then resetting it to 100% upon completiong. What I find is that after the Opacity property has been adjusted (to anything), and then reset to 1, the form ...more >>