In .net 2.0 (beta 1), I've got a ListView that contains 1000 items. I've set it so when I click the heading of a column, it groups by that column. All works fine, but because the listview is redrawing after every change, it's quite slow. If I uncomment the .Visible lines, it's *very* fast, ...more >>

I've written an app that minimises to the system tray when the 'close' button is clicked (I'm setting the Cancel flag in my formname_Closing event handler). This works fine until you try to logout of Windows - the logout is unable to stop my app! Is there any way to check whether the user is l...more >>

Hi, I have a form with a pictureBox that should change from visible to not visible depending on a status. The form receives events from a communication thread in an object called commDriver. In my form I register the event commDriver.OnStatusReceived +=new StatusReceivedDelegate (co...more >>

I have a combobox whose datasource is a lookup table populated from the database. However, the record whose field is bound to the SelectedValue of the combo uses DBNull to indicate no selection, in which case the combobox should display "<default>". I convert the DBNull to zero in the source...more >>

I wrote a very simple windows form application. In my form I put a button. Then I wire a function to the Paint event of the form. In that function, I do nothing. I start the application from VS.Net and set a breakpoint in the function. Everytime I hide the form and then unhide the form, the br...more >>

I want the user to be able to drop down the list in a combobox and the user to scroll the list up and down but they can't pick an item in the list. I have started looking at overriding the DefWndProc but not sure what messages to capture. Any help would be appreciated?? -- Scott Wylie...more >>

Can someone give me an example of the PROPER way to create a singleton form in Whidbey? I've done it in the current .NET, but I've been reading that we can't mess with the constructor in the designer.vb code. I've been searching for info, but haven't found much in regards to doing this in Wh...more >>

Hi All, I want to stop my app from closing, unless the user specifically wants it to, I use this code: private void MainForm_Closing(object sender, system.ComponentModel.CancelEventArgs e) { if(MessageBox.Show("Are you sure you wish to close Millenium?", "Question", Messag...more >>

Hi folks, Small issue with sender argument in mouse events. I have a container control that users can add instances to of a another control at runtime. In response to the user adding a new control (Task) to the container (Pad), I create a new instance of Task, add two handlers, one for Mous...more >>

I can't believe I am struggling with this, but I am. I have a form with the controls bound to a DataView. The form has an "add" button which is meant to add a new row. I do this with the code below _______________________ Dim newDataRowView As DataRowView = MembersDataView.AddNew newData...more >>

Hi, I want the property grid to display a list of values, say MyParameters { private ArrayList Surveys; .... } Survey1 Name: New York Operator: Siemans Price: 1000 Survey2 Name: Washington DC Operator: Lucent Price: 999 I program in C#. Thanks. Da...more >>

I am looking for a way to get the background color of a listview header (when in Details view) I have found a couple various threads on how to change the background color, but I have yet to find out how to GET the background color. 99% of the time it is Control, but I want to be able to get it. ...more >>

Hi all, Is there anyway to track the progress of a Async Web Service Call (BeginXXX /EndXXX type)? In my long running web service, I want to flag certain stages of completion, is there a way to relay this data back to the calling function? Thanks. -- Lucas Tam (REMOVEnntp@rogers.co...more >>

I have spent hours on the following two problems: 1 - Resizing a column to a new width 2 - disabling the addnew feature of the datagrid, without making cells uneditable (i.e. by locking the control) Here is the data I have on my progress so far: I think the problems both stem from t...more >>

Is it possible to show a form by using its name property in VB.NET. I am thinking about getting the name of the windows form from database and then show the form. just like DoCmd.OpenForm "nameof form" in MSaccess.. Thanks in advance chaplin ...more >>

I have a form where I was using databinding to bind all of it's fields to a business class. Now I'm converting it over to binding to a list object which is a list of the same business objects. Note: me.Me.CustName is a textbox in this form, "Me.CustName" is a property in the business objec...more >>

I have a simple winform. On the form, I have a DataGrid and a Textbox, along with a typed (and filled) dataset. First, I add a databinding to the textbox, binding it to a field in say... Northwind's Customers table. Then I databind the datagrid by setting the Datasource property to "dsNorthwin...more >>

The designer keeps spuriously rearranging the tabs in the TabControls. This is highly annoying! I checked Google and it seems that there are reports since VS 2002. Isn't it time to provide a fix??? --=20 Address email to user "response" at domain "alexoren" with suffix "com"...more >>

Hello, I am in the process of migrating a VB6 component over to C#. This component uses Win32 API calls such as FindWindow, SetForegroundWindow, SetWindowLong and EnableWindow. Should I be using these APIs to achieve the same results in C# or should I be using something unbeknownst to m...more >>

I am wondering if there is a way, such that when you deploy a .NET Application via the web with no-touch deployment, there is a way to allow the user to relaunch the application without being connected to the net, as long as the application has been visited before. I understand that there is a l...more >>

Hi all, If you've used the ODBC DSN wizard, you've seen that there is a button which lets you test a data connection. I want to create a dialog with the same funcionality; to know if a connection to a database was made succesfully. The form has to render itself completely first, then attemp...more >>

At the end of a process I have been asked to message different people depending on the outcome. Any ideas on working with Lotus Notes instead of CDOM ?? TIA __Stephen ...more >>

It's a simple question: How can I specify the ListView row height. Where do I define it, in the ListViewItem or ListView itself? Thanks. lz...more >>

Hi everyone, I have a pesky little problem that is driving me nuts. I'm trying to capture an image of a web page programmatically in a background thread or process. What I'd like to do is create a Bitmap object of a webpage from, say, the new WebBrowser control of .net 2.0 or even the old Act...more >>

I am getting an error that a file doesn't exist. When it errors on the box, I go into the Explorer and I see the file???? Here is my existing code: // Get file for new dump file //string path = @"c:\temp\chelsea_update_full.txt"; Former file & Path from Dev Box string path = @\...more >>

I am creating an application that will create a notify window similar to outlook 2003 notify popup. I am making an asyncronous remoting call using system.thread that raises an event to show the form. However, the form shows up as a black box and then immediately disappears when the event is ca...more >>

Hi, I have a button, which I disable after it has been clicked. it gets enabled when all processing (code that gets executed when the button is clicked) is done. Looks like this: Private Sub btnLabel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLabel.Cli...more >>

I have a ComboBox bound to a DataTable. For example: ID Name 1 John 2 John 3 Bob I then set ValueMember = "ID" and DisplayMember = "Name". All the data in the ValueMember's column is unique, but the DisplayMember's column may not be unique. The problem: U...more >>

Hi, In my datagrid i have a column that contains totals which I wish to to keep a running total of in a text box elsewhere on my windows form. So if a row is removed from the datagrid then the running total is reduced and if added then it is added. Also is it possible to take the data which ...more >>

Hello, I want to provide a file copy operation with dragging an icon (or something else) from my application to Windows Explorer or another application which supports file drop, I can easily get files which dropped to my application but do not how to perform the first one. Most of the tutor...more >>

Hi, I have a problem on some machines to AutoStart a very simple windows service. It just logs a line in the event log when the OnStart and OnStop occurs. The service is setup as "Automatic" / Localsystem Accoutn. The machines where the service does not autmatic start are member of a domain ...more >>

I have a vb.net 1.1 winforms app that performs a login, checks for updates, downloads updates to the client, then starts the client app. The client app is a MS Access 2003 application. I created a setup file using the latest version of InstallShield and have installed this app on about 10 ...more >>

Hello, I need to create a menu dynamically where the number of items is variable but I don't know how to add a single click event handler with a way to distinguish which item caused the click event: foreach (MyType obj in ObjectTypes) { MenuItem item = new MenuItem(obj.title); /...more >>

I'm new to .net windows forms but know vc++ mfc and MVC (model-view-controller) very well. Just getting started I find it surprising I can't generate custom event handlers via a wizard in the class view in the vs.net ide. You have to code your own events and delegates stubs by hand. And the...more >>

Hi, I want to create a simple form containing, lets say, two TextBoxes within a Panel. Both TextBoxes should resize equally when the user resizes the window. Can the Forms layout manager handle this? And how do I have to set the properties to get the desired effect? Your help is quite ap...more >>

I'm looking for a component/service that will log unhandled exceptions to a Web service. While there are numerous frameworks and examples that can log exceptions to a log file, the event log, or send an e-mail, these approaches don't work for my application which is intended to be a retail de...more >>

Hi, Anyone know how to read the text from the title bar of currently active window in Windows. I want to record what application I used at what time. I hope there is a quick c# answer. Thanks in advance ...more >>

I have 3 textboxes on a form and I want to advance to the next textbox after entering some info and pressing enter. My cursor doesn't move when I press enter. How do I make it advance? I am using and learning vb.net 2003. -- Thank you for your help...premium001...more >>

Our company as written an application where users can write c# 'scripts' for some very specific scripting needs. It is our intent to distribute this to analysts so they can write scripts. The application works very well, but we want to employ some sort of intellisense or code completion much li...more >>

New to programming in VB.NET, is there a way to navigate to different forms. I can open a new form but I am having trouble closing the old one. Tom...more >>

I have the following situation. I am creating my own user control. This asp.net user control will have a method called "Read". When this method is being called from the page. It will read line by line threw a list dictionary. While reading line by line it will be setting public properties tha...more >>

What format should an application icon have? A 16x16 bit seem to work as an icon for a shortcut only. What format should an icon have that is displayed when the program is running? How do I specify which icon to use when running? Do I need multiple icon files? ...more >>

If I set up a combo box at design time it works just fine. Now if I place the following 3 lines in the form load procedure (I know they are correct because they were copied from InitializeComponent) The first line is obeyed, but the second line is ignored. I know this because if I look at "Dis...more >>

Hi, I want to write a small tool having only the NotifyIcon as its visible GUI. I don't need the form associated with the NotifyIcon. How can I set the form's visible status to false? If I write "this.Visible=false;" after the call to InitializeComponent() nothing changes; the form's still vis...more >>

Hi, I have a windows form using vb.net that has 5 text boxes, 1 button and a datagrid. txtProdID txtDesc txtQty txtUnit txtTotal dgProducts btnAddtoDataGrid When the user has entered the info into the textboxes and then click btnAddtoDataGrid then I want the data added to the datagrid...more >>

I am writing an application which automatically perform some function for every 5 or 10 min....I would like to ask how to automate it? Thanks! ...more >>

Hi, I have an MDI application=2E Initially I open say 5 forms, they= position themselves in a cascaded manner=2E When I close all of= them and open another form it positions itself in the location= which would have come after the 5th form=2E It is as if the MDI= parent is remembering the lo...more >>

Hello I just realized my c# application which has only about 3 forms, is almost 50MB in size. Is that normal ? How can I make it more managable and practicle? Thanks ...more >>

Hi, I'm on my way to my first OOP-for-real project in C#, and having some big trouble with code architeture. I have four namespaces: - Layout - Info - Where I hold empty structs with business objects - DB - Where I fill my Info objects - Classes - Where I do all the business ...more >>

I get an "ArgumentException: Invalid parameter used at System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement)" exception. it is too ridicilious to get such an exception, can anyone see what might cause that exception? (By the way, i am trying to throw the he...more >>

This one has me stumped. I'm using sample code in the C# Programmer's Cookbook as a guide. Specifially, Recipe 4.3, Execute a Method Using a Timer. I created a form with a ProgressBar on it (Min=0, Max=100). When I created my Timer object I passed the ProgressBar as the second parameter, t...more >>

Hi ppl, I have a situation where a user can add a user control to another= control (like a scratchpad) at runtime=2E I've done this by way of= a context menu=2E The user selects to add a new item from the= context menu and then clicks on the scratchpad where they want= to create the new c...more >>

This may seem like an odd question and I'm not talking about using a browser in my smart client. Rather the following: I find it easy to create a nice UI when building a web application but since the project I am about to embark on is local to the machine, making a smart client makes more ...more >>

I'm writing an app in vb.net 1.1 and would like to use a toggle button similar to the one found in MS Access. does anyone know of such a control or how to make one? Thanks. -- moondaddy@nospam.nospam ...more >>

I want to monitor "applications" much like the Windows Task Manger does. All I want to know is what applications are running, and which application is on top. However, I don't want to "poll" the task manager for that info periodically. Instead, I need to know whenever there is a change in t...more >>

I am trying to paint in a custom control "OnPaint" but can not paint over the child controls such as a button or listview. I also want to be able to paint in the "Bounds" region of the control over the scrollbars in a ScollableControl. Any ideas? -------------------------------- From: Chris Pursle...more >>

I use the following code to open up a form. ------------------------------------------------------- If fImage Is Nothing Then fImage =3D New frmImage End If fImage.Show() ------------------------------------------------------- It works the first time, but when the form i...more >>

If a form returns a dialog result and it can be handled immediately, then you can just check for the result and proceed accordingly. However, if the result of a dialog has to be returned from a deeply nested method in the call stack to the original caller in the call stack, what is the best...more >>

In the .NET 2003 docs, it says to use the following code for an event handler to determine which modifier key was pressed when an event is fired: Private Sub Button1_KeyPress(ByVal sender As Object, ByVal e As _ System.Windows.Forms.KeyPressEventArgs) Handles Button1.KeyPress If (Control.M...more >>

We're trying to bind a nested table from a DataSet that is loaded form XML that looks like this: <RootNode> <RootRecords> <ChildsNode> <ChildRecords> The table we're trying to display is the 'ChildsNode'. We seem to be able to bind successfully, but the DataGrid displays...more >>

Hi! How can I define the icon for my custom component in VS2003? (to appear on the toolbar) Thanks! -------------------------------- From: Atmapuri ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>gQvgEg9shEWPrTHbTy8B1g==</Id>...more >>

A form has a background image. On that form there is a button. Partially overlapping that button is a class derived from Control, with only one customization: it makes its background transparent in the constructor, using this technique: http://msdn2.microsoft.com/library/wk5b13s4.aspx Bring...more >>

hi, I want to create RoundRectRegion in .net. We used to have createRoundRectRegion API in vb6. Does .net frameWork has anything to achieve the same.I also don't find any method to create Rounded Rectangle. plz suggest me how to go about it. sanjay singh ...more >>

Hello, I am writing a Component whose work needs to be done on a separate thread (or ThreadPool), and when this work is done a Component event needs to be fired in the main GUI thread. What is the best way to send a mesasge to this Component? As far as I can see, here are my options, in ...more >>

Hi All, I have a datagrid that is populated by a strongly typed dataset where ID must be supplied... when I'm adding a new row in code this isn't a problem because I can set the ID to whatever I like. However I do not show the ID in the datagrid so if I type something in the new row of the ...more >>

Hi, I'm developing some kind video player application. I want to control the current position in the video using a slider. Could somebody give me a starting point on how I create a slider in a toolbar? regards, Achim...more >>