Hi, I get a 'System.Data.MissingPrimaryKeyException' when running the follwing code:- StockListDataSet.Tables("Items").Rows.Find("12345") Is there any way around this? Do I need to supply more information? Thanks. ...more >>

Hi, Buddy Is there anyway to add background image to a datagrid control? Thanks a lot. Bruce...more >>

Does anyone know where I could find a walkthrough on setup and deployment. I want to distribute an application I wrote. I want it to have a liscense agreement show up during the istallation. I am knew to vb.net so I hope I am asking the question right. I have seen the one in microsoft's kno...more >>

Hi, I have used the datasource wizard to add a local datasource to a combo box. This all works fine up to a point, but what I want to do is at runtime, specify the path to the database file that the combo box should be bound to as it may not always be in the same location. The Wizard has...more >>

Hi All I have a simple vb.net app that once run for some reason does not allow me to log off or shutdown the pc ? When i try to do so it will close my app and then will only shutdown or logoff if i attempt to do so once again ? Does anybody have any does why this would be so ? ...more >>

The error is: The proxy settings on this computer are not configured correctly for Web discovery. MSDN states that this is caused by: This error appears in the Add Web Reference dialog box if you are developing on a machine that is behind a firewall and a proxy server has not been explicitly sp...more >>

Hi, I'm new to VB.NET..I'm developing a login page...im getting this error.. System.InvalidOperationException: ExecuteReader requires an open and available Connection. The connection's current state is Open, Fetching. at System.Data.OleDb.OleDbCommand.ValidateConnectionAndTransaction(String meth...more >>

Hi, In my program, I have a loaded assembly that contains a module (not a class, not a form, but a module). I need to use reflection to invoke a method in this module and pass some parameters to it. How do I do this? I tried various things but they didn't work for me. Can someone show me ...more >>

Greetings, Is anybody aware of any source code that will export and convert pdf, doc, rtf, htm, or .pdb to a plain text file? Thanks, -Dave ...more >>

I use .NET mail compoentn to send mails. For example... SmtpMail.Send(mailMsg) How to programatically save a copy of this email? Thanks and regards J Justin ...more >>

I am trying to dynamically load an assembly via reflection and then invoke a method of that assembly that will populate a custom type collection passed into the method byref. I am able to dynamically load both the DALC component (for the method call) and the Entity component (for the custom typ...more >>

I wrote a console application that basically consumes arguments and starts other command line apps via System.Process. Let's call it XCompile for now. I wrote a Visual basic add-in that does pretty much the same thing to XCompile. Let's call it MyAddin. XCompile collects information to send to...more >>

Hi all, I've a form containing some textbox fields. I wrote a simple code to check if the field is blank in lost focus event, an msg box will be shown to remind user about it. But don't why the lost focus event is triggered when the form is shown. I suppose the check code is effective afte...more >>

Anybody has a tip of where to find info/example how to retrieve an icon from a .RESX-file? /k ...more >>

Hi I need to create an object of a class using a type variable. for example, instead of writing: X = new MyClass I want to write something like: Dim t as Type = GetType(MyClass) X = CreateObjectFromType(t) is this possible? ...more >>

I have a set of radio buttons in a win form that each have an image and text, like so: O [image] [label] O [image] [label] O [image] [label] O [image] [label] How can I set it up so that the image is left aligned, next to the radio button indicator, and the text is left aligned next to ...more >>

Where are System.Management and System.DirectoryServices? TIA ...more >>

Hello, I want to make a program to scan files by keywords, but how to realize "full word match"? Thank you ...more >>

Hi, I have some code to load some plug-ins, but the code requires me to know the name of the class to load (here: SamplePlugin, derived from IPlugin) : (Here is some C# code, but I use VB.Net to code my program) using System; using System.Reflection; public class Driver { static ...more >>

I'm trying to find a good way to handle Control.InvokeRequired without duplicating four lines of code in every function/event. Typically what I've seen in books is this: If InvokeRequired Then Invoke(new EventHandler(AddressOf thisFunc), new Object() { sender, e}) Return End If At...more >>

Hi at all, i have a little problem. In a simple web page aspx i have a DataGrid (..WebControls.DataGrid) and some others web controls (edits and buttons). The datagrid control is usad to display some rows. How i can put focus on the first row of datagrid? all of this in vbnet obviously. tha...more >>

Now I am using the Shell command in the following way, Shell("Notepad C:\Test.txt", AppWinStyle.NormalFocus) If I save the content of Test.txt as binary data into my database and read it back from the database. Is that possible to use the Shell command to launch Notepad (or other programs li...more >>

I'm using the following code ********** command.commandtext="Select * from DB where Acc= 'Net Profit' connection open i= command.executescalar() connection close *********** This code returns zero(i=0)i use the following code it works fine ********** command.commandtext="Select * from DB ...more >>

I having a hard time with regular expressions, this is my first attempt at using them. I need to take a string which will have some text between quotes and return the text between quotes or any other character for that matter. The text will not always be the same length or in the same place i...more >>

Help! I'm writing a vb.net application that uses Access as a database. I've got a bunch of queries that I wrote within Access. I'm running them from VB. Most of these queries have parameters. I'm adding parameters to an OleDbCommand using Parameters.Add(name,value). This works fine as ...more >>

Not having lots of luck searching groups.google... We are still using VB6 at work, so I bought my own copy of 2003 .Net. I have to say I love the new auto-hiding toolbox & properties. But I know it wil take some time for me to migrate programs over to the new ..net format... so.... Is it p...more >>

What is the best way to return an exit code from a VB.NET windows forms app? My Forms application is dual purpose. It is an interactive windows app. It is also automated and run via a script and it needs to return an exit code to that script. I've tried a few ways to return an exit code. ...more >>

I want to dump Crystal, one of the many reasons being that it requires a client-side installation. I'm looking for a reporting package that integrates into DotNet yet has absolutely no COM in it, so I can deploy my app with just a file copy. I also need the report designer to be stand alone like...more >>

Is it just me not being able to find it in the menus, or is it not possible to 'make .exe' with Visual Basic 2005 Express Edition Beta? Thanks, Jim ...more >>

I have a winform that calls a database and i generate a dataset to populate my datagrid, now I allow the user to click on a cell in the datagrid which then populates text boxes with details on the user selection. doing this i make another call to the database. which i would like to avoid if po...more >>

Is it possible, and if so examples please, to replace the Grid (Select, Edit, Delete) button with an Image? Thanks BrianDH...more >>

Hello - I can read the csv file line by line into a one dimensional array - no problem. But when the data has 7 columns - and you'd like the Names to appear in a combo box, it can get tricky. Fred,0,0,0,0,0,0 Wilma,-1,1,0,0,0,0 Betty,1,0,0,0,-1,0 etc I found examples elsewhere of using ...more >>

Hi, I have a base usercontrol with a method (blank method, no code), I have another few usercontrols that will inherit this base usercontrol, but I want to force all the usercontrol that inheriting this base usercontrol to override the method with its own code. How do I do it? I have tried ...more >>

I need to learn about threads and threading. I currently have a process that is pulling 10 to 12 thousand records from the AS400 and formatting the data then storing into a SQL server. This process is taking just over one hour and I would like a progress bar or something to show that it is act...more >>

In C++, I was able to use this line of code (do not ask what about the object names--its for a game). reduce = AtkUnit.Hull / 100; To get a percentage to porportionally reduce another integer (the idea is that the integer is reduced to how much HP it has). In VB .NET, however, it rounds ...more >>

Hi all, When I press the tab key, I cannot fire the keyup and the keydown or any keypress events How then would I capture those events? Thanks ...more >>

If you have a bitmap, but need for it to be of a different PixelFormat, how can you do that? PixelFormat is ReadOnly. Does it have to be done while Drawing to a graphics object? I wonder if there's a code sample available somewhere in which this is done. Thanks Phil Galey ...more >>

I need to learn about threads and threading. I currently have a process that is pulling 10 to 12 thousand records from the AS400 and formatting the data then storing into a SQL server. This process is taking just over one hour and I would like a progress bar or something to show that it is ...more >>

Hi, My App must get the files *.Ext in AppPath\SubDir\. What's the best way to achieve this using .NET framework 1.1? thanks ...more >>

The other day I posted a question about using ActiveX in my project..... obviously, that's not the best solution. But I found this great article on what the author calls rich-client which does EXACTLY what I'm looking for. Being able to show a windows form in an IE window! http://msdn.micro...more >>

This has probably be asked before but I'm trying to trap the event before a user closes the main form of VB.NET application to show an error message if there are unsaved changes. Can anyone point me in the right direction? *---------------------------------* Posted at: http://www.GroupSrv.com ...more >>

How to get a list of Local Windows users with Username, Full name and Description? TIA ...more >>

One more tweak to my survey program. Since all the survey records are stored in a dataset and updated to the database only when the program closes, I need some sort of protection against a system crash. So, I'm trying to have a timer running that updates the database every 10 minutes. I'm wond...more >>

I need to write a small application that can check the version of a .dll currently installed, and the version of the same .dll on an ftp server. If the version on the ftp server is newer, it needs to be installed on the machine. I'm having difficulty getting the version info from the .dll's....more >>

hi, i was reading a vb.net book that said the following regarding: Interfaces allow you to program using methods on the interface rather than methods on the object? How is this a benefit in lamen's terms? thanks, mj...more >>

Hi I made a simple TCP Listener server application that listens to a specific TCP port for incoming packets from a client. Everything seems to be fine. I still don't know how to determine the client's IP address (which is the source of the received packets). Does anyone know how to fin...more >>

I've noticed that many programmers use classes to store data about such things like: Class Customers .....Phone ....ID ....Address End Class.... In VB.net, does a 'structure' make more sense for storing this type of data, if your not going to be using functions/Proceedures and such? ...more >>

Nothing fancy, I just want a control to display PDF and TIFF files in VB, and perhaps let me zoom in and out of the image and scroll around. I don't need to edit or do anything complex, just view the stuff. Surely there is a built-in (i.e. FREE) control that will let me do this? I am aware...more >>

hey all, i was wondering when you lookup commands in MSDN help in the description you'll often see it say that it's threadsafe or not. i know kinda what a thread is (needle and thread right? j/k :) no i really know a little about threads, but in lamen terms what does threadsafe mean? tha...more >>

Good afternoon all i am currently battling with memory usage of my ..NET applications. A simple form with 2 text boxes, 3 command buttons use approx 8MB of RAM, though when compiled the exe is about 28KB. I am developing solutions primarily for terminal server environments and i cannot afford my...more >>

When I run my sample application straight from a button off the web... it loads OK but displays a interesting message... "Microsoft .NET Security Information This application is running in a partially trusted context. Some functionality in the application may be disabled do to sec...more >>

Hello All, I need to use mshtml.HTMLDocument.createDocumentFromUrl in VB.NET to load a webpage. The code looks like this Imports mshtml Public DocumentFactory As HTMLDocument would be very grateful if you could let me know how to solve this problem in VB.NET. I am getting the error "Object...more >>

Hello, I am having certain problems in trying to use the function createDocumentFromUrl in VB.NET but get this error.."Object reference not set to an instance of object". Here is the code that I am using Imports mshtml Public DocumentFactory As HTMLDocument Public Function GetWebPage(B...more >>

Please let me know code used to simply connect a database and then add, delete, update records in asp.net using vb.net. ...more >>

I very much appreciated your answer to my question. But I was too hasty in replying that it worked. I am trying to connect a textfile via an ODBC connection and since I'm new to VBNet it does not seem to work. I made sure that my DNS for a text file is set ok in admin tools. I then created ...more >>

Dear Readers, This is my first post to this group. I was pointed to this group in a other vb group, so i have better luck here! For my learning curve of VB .NET i want to make a traffic simulation program. Before i start programming, i need to know if there even is a possibility to make a ...more >>

Hi, I've struggled with this problem for a while now without finding a solution. The scenario is as follows: - I have a flat text file exported from a main frame. - I use a structure to map data to the data in the file: Public Structure PartRecord <VBFixedString(8)> Public PartID As S...more >>

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