Hi, i have client/server socket application, but when i run the client in a separate computer i get this error below. Request for the permission of type System.Net.SocketPermission I search the net but it leads me to caspol or mscorcfg.msc.Is there other way to NOT configure using these...more >>

Hello, I'm using a combo box and some text boxes on an input form. When the user submits the input, all the textboxes should be cleared & the combo box reset to the way it was originally displayed (order desc.) How do I 'refresh' to combo box to display as it did? It is bound to a datase...more >>

Hello, I have a dialog in my VB.NET application that has some controls for configuration and an "Apply" button. The design calls for the Apply button to be enabled only after the user has made changes to the settings. To do this the change events for each control are used and the Apply butt...more >>

I am attempting to add a "console mode" to my Winforms app. My intention is that when I start the app with a special switch (for example "myapp.exe /batch") to does not launch a graphical UI but instead just displays console messages. My first guess was to simply change the Main method of ...more >>

Are there any performance issues, if we have many dll reference added to our project. Any way, does it take more time to load the application if we have many dll reference added to a project, even though we don't use at application load. Does more dll takes more time to load. If we merge ma...more >>

I'm setting the datasource of a DataGridView to a datatable. This loads the grid correctly but it automatically selects the first row in the grid, triggering the SelectionChanged event. Is there a way to stop the grid from automatically selecting the first row? Thanks. ...more >>

These setting mystify me for these reasons. *SelectedItem* - Help says that 'SelectedItem' gets or sets the currently selected item in the combobox. *SelectedValue* - Help says that 'SelectedValue' gets or sets the value of the member property specified by the ValueMember property. *Valu...more >>

Is the code below the proper way to achieve a LinearGradient Background on a form? Private Sub MyForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles Me.Paint Dim oBrush As New LinearGradientBrush(Me.ClientRectangle, Color.AliceBlue, Color.CornflowerBlue, LinearGradientMo...more >>

I'm trying to set the application to use XP visual styles, but in the properties page I tried to set it and I get the following: Startup object must be a form when 'Enable application framework' is checked. I have a sub main starting up the application and in there it determines which porta...more >>

Hi, In my WinForms application, I have a set of controls that are bound to a BindingSource control. When the user closes the form, I need to ask him if he wants to save data. The problem is I cannot find anyway to check if the value of any textboxes is changed! Obviou...more >>

I have an exsiting MDI application. I have the when the child is called from the Parent, I set it's DockStyle to fill, I also have the child form set to maximized In VS 2003 and 1.1 this works the way I want it to, the child form is maximized whithin the parent so that a title bar is no...more >>

Hello, I have a DropDown that is bound with a array containing 3 strings: First, Last, All. These options indicate how many objects the user wants to analyze. So, the user shoud choose one of these options, or type a number. These information is then saved, to be reloaded later. My probl...more >>

Dear all I create one stored procedure have two select statement on it Then i want to fill one dataset(with two datatable) by this stored procedure, how can it do?...more >>

Hi, I am having a number of panels containing other panels and controls on my form. When I resize my form, the redrawing is quite slow. How do I properly handle this so that it redraws form faster when I resize it? I am using VS2005 and C# Any help wll be appreciated Dino...more >>

How to compare two string e.g i compare two string e.g User == user is true however i want User == user is false by 'U' and 'u' do u know what i said...more >>

Hi, I'm trying to populate a combo with a typed dataset (I am filling the dataset in the form load) by using the databindings , (Selected Item & Selected value) I get a blank combo box. (Unless I bind the text property, but then I only get the first row as the combo text.) Am i missing a ...more >>

In a report, I tell a table or a text box to print at specific coordinates but it is off. How do I teach ReportViewer to take PageSettings.HardMarginX and PageSettings.HardMarginY into consideration? This occurs in .NET Framework 2.0....more >>

Hi, What would be the best way to find if Form.Show() is already called? If I call Form.Show() methid several times, does it have any side effects? Does it call eny events? Than k you, Alan ...more >>

Hi Gurus, Is there any way to find out how many Dll got loaded when my application started. Any help greatly appreciated. Thanks, Dan ...more >>

I have an application that uses mdi. If a file that is an mdi child has an ampersand in the name of the file, the ampersand is getting read as a hotkey in the tab text. Does anyone know of a way in vb.net to make sure that the ampersand is represented as an ampersand and not as a hotkey. ...more >>

Hello all! I'm looking for ideas on implementing a textbox with autocomplete functionality, just like the one found in Excel. As the user types values into the textbox a lookup for matching values is performed. For example lets assume that the user types the character '1' and that the candi...more >>

Hi, Firstly, I'm using C# if that will make a difference to the answer... Is there any way you can assign two values for a combol box like in the vb6 'old days', so you have say, a string 'UserName' displayed in the combo box, but that returns an integer 'userID' for that selection? If n...more >>

Hi, * Apologies for reposting this from .NET Academic * I am having problems updatingh the user interface in a multi-threaded application. BACKGROUND My App has a user interface (the starting class containing main) and a CPU class to handle many asynchronous comms routines. The user inte...more >>

Hi, I have seen some code which is basically GetWindowLong + SetWindowLong with AND NOT ws_ex_clientedge, but it either removes the caption or nothing at all. Jared ...more >>

Hi Gurus, Is there any way to find out which/how many dlls got loaded when application loaded. Any help greatly appreciated. Thanks, Dan ...more >>

Hi, I am trying to show TAB character (char(9) or '\t') in a combobox dropdown list, but it doesn't show it. Is there anyway to show '\t' as a TAB in dropdown list text? If I can show \t in dropdown text, then I can make it like multicolumn list. This trick used to work back in win16...more >>

I have a custom component which has a complex internal state that is serialized using CodeDom serialization. It is part of a library used in a moderately complex project. The component has a custom design-time interface displayed within VS2003. All of the library assemblies are loaded into the glo...more >>

I am looking to implement a search feature into a Windows Forms MDI application. Specifically I plan to embed 3 textboxes into a toolbar; one for LastName, another for FirstName, and one for CustomerID. When the user starts typing into any of these textboxes I would like to pop up another fo...more >>

Hi, How can I limit user to only available items in the combobox list? By default user can choose one of the list items and also type anything she/he wants! Thank you, Alan ...more >>

I've built a windows app on .NET 2.0. I have a few users that run it without issue. One user reports that it immediately pops up the standard windows window that reports: <program> has encountered a problem and needs to close. We are sorry for the inconvenience. What does this possibly m...more >>

How can we Run one Mdi Form Witihn Another ... ? ...more >>

I am designing a new Windows Forms client application (with SQL Server db on the back end) for which users will authenticate via NT authentication (network), or SQL Server authentication. Users who are granted access to the application must also be granted access to specific forms and controls...more >>

Hi, I am trying to display the processes running on my system to a listbox. but i got 'DisplayMember' is not a member of 'System.Windows.Forms.ListView'. during debug. any clues? below is the code Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handl...more >>

Hi, I have added some buttons and boxes on the VB.net form. After deleting these buttons and boxes from the form, I find that the code is still there. Does VB.net have a feature to clean up these unwanted codes? thanks ...more >>

Does anybody know how to get the blinking to stop. When I hover over the ToolStripStatusLabel sometimes it blinks and sometimes it doesn't. So the tooltips seem to behave inconsistently. The blinking is very annoying and makes the tooltip unreadable. And what does AutoToolTip property do. ...more >>

Hi, I am at the early stages of defining the technology requirements for a graphical, 2D Windows Forms application with display features along the lines of MS Visio. It has a requirement to display it's data in a number of tree or network like formations. The "workspace" will take up the...more >>

Hi, I would like to data bind two different forms with each other. I would like to have employees on the first form and orders on the second. When the selected employee changes, the orders should change two. It is easy to do on a single form where you can add a new bindsource which points t...more >>

Hi, I am at the early stages of defining the technology requirements for a graphical, 2D Windows Forms application with display features along the lines of MS Visio. It has a requirement to display it's data in a number of tree or network like formations. The "workspace" will take up th...more >>

Hi There, Hope everyone is well? Im after a sample Application where the front screen looks like the Outlook 2002 or 2003 screen, ie with the Frames etc.I would like this to be free if Poss. Anybody got any Ideas? Many Thanks Si ...more >>

I've created a project data source based on an interface that in turn derives from another interface. When in Visual Studio Data Sources view I examine the properties exposed by the data source, I see only those properties in the derived interface and none from the base interface. A data so...more >>

I have project where I need multiple forms using a common menu structure (like a web solution but with WinForms). Is there a best way to do it? I'm currently trying inherited forms, but I'm not sure that's the best way as it seems to present challenges....more >>

I have a form with labels that can be dragged and dropped onto different regions of the form either individually or in groups. I signify labels which have been selected by toggling the BorderStyle between FixedSingle and Fixed3D. Upon a single click the toggle occurs. Upon a double click I di...more >>

Maybe this is normal, but as I type in the code file, the designer tab shows the little asterisk indicating the file has changed in the designer as well. Normally this wouldn't bother me, but in my case the designer files (including the .licx and resx) are also tagged as changed and get check...more >>

I have set a datasource to a combo box. COmbo box style is drop down list. I am trying to set it's selcted index to 0 at run time bit it is throwing following error : An unhandled exception of type 'System.OutOfMemoryException' occurred in system.windows.forms.dll Additional information:...more >>

How to get the month or day of datetimepicker e.g if day 1 it show 1, i want it to be 01 Moveover, can i change the datetimepicker into three combo box, one is day, month, and year?...more >>

In a Windows Form, I have a set of detail controls bound to a table in a dataset through a BindingSource. I cannot figure out how to tell if the user has edited any data in the controls that needs to be saved to the database. The EndEdit method will force any changes to update back to th...more >>

I have a stack trace of a NullReferenceException and the only code in the stack trace is from System.Window.Forms. System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, In...more >>

Hi EveryOne, What is the best approach for data access while developing applications using Windows Forms ? Is it opening, working with and closing a new SQLconnection and SQLcommand object everytime a DB access is needed , or maintaining a single open connection/command object at the applic...more >>

Is there any performance issues using remoting. Kim ...more >>

Hi, I found .NET.1.1 quick starts for WinForm quite useful. It is being hosted at the following link: <http://samples.gotdotnet.com/quickstart/doc/default.aspx> Do we have .NET 2.0 Windows Forms quick start hosted somewhere? Thank you, Alan ...more >>