I had created one application in .net.Now want to check whether any user enters correct string or not.If any user entering an incorrect string display an error msg.How can i do this validation.In numeich it works fine.But in String it's not working . ...more >>

I have bunch of textboxs in a form.Now i want ot validate these textboxes.These textboxes i am entering string as well as numeric values.How can i validate string and numeric values? Thanks for your any advice. ...more >>

I would like to put program info in my applications' about screen such as compile date & time, lines of code, etc. Is there a way to do this automatically when I compile? ...more >>

I need a short and simple code example to make an application that copies files in a folder from a local folder to a remote folder on the ftp-server. reidarT ...more >>

Is this true: An existing row in a data table that is deleted still exists in the rows collection, but it is marked as deleted (rowstate = deleted) But If a row that was added to the data table, but not committed by accepting changes, is then deleted, it is actually removed from the dat...more >>

I see that this question has been asked before in thye newsgroups, but I cannot find a suitable answer. I have created a user control that has quite a number of buttons and textboxes. These I have specifically given very similar names - e.g. button - cmdSodium, cmdPotassium, txtSodium, txtPotass...more >>

I have searched marshaling articles from MSDN and Google but I am stuck with solving my problem to marshal arrays to COM caller from my managed COM class I built a .net COM class in VB and tested it from an application built with C tool.. It worked well except for those functions in the ...more >>

Is it possible to use HTML tags in a WebMethod description (VB.NET), every time I try it remains text ...more >>

How do I hide the rowselector on a datagrid? Also, it there a way of changing its width? By row selector, I mean the that grey column on the left hand side, where the arrow appears when you click into a row. Thanks Vayse ...more >>

hi, I tryd this one but it dosn't work lv.Columns.IndexOf(lvch) where lv is my listview and lvch is the columnheader of the listview thanks ...more >>

Looking for a component or source code for converting between rtf and html. NOT a report generator with rtf/html output, but one I can use to, say, load a bunch of html files and save them as rtf or the other way around (i.e. without displaying an interface to the user). Would prefer not hav...more >>

Hi All. I'm printing the contents of a datatable in my control, and actually it is working well. My problem is when a row is deleted from the datatable, which fires the RowDeleted event and, inside this event, I try automatically redraw my control. What I have noticed is, after RowDeleted e...more >>

Old problem but still not solve. I got a delete button, to delete the detail in datagrid, my datagrid is bind to stddtChg After dsInvInfo.updatE(strTdChg) , it did nothing, all the record still in Database. Please help Dim cm As CurrencyManager = Me.BindingContext(dsInvInfo,...more >>

I am looking for VB.Net books which provide a lot of exercises (preferrably with all the answers worked out on CD). In earlier reactions Ken Tucker and M.Posseth recommended a few books. Thanks for both of your reactions. Ken included the links, so it is clear which books he recommended (I w...more >>

Hi, In my VB.NET 2005 application I want to reuse several icons in different sizes. My icons contains images of 16x16, 24x24, 32x32 and 48x48. The problem is: I doesn't always use the right size: sometimes it resizes the 48x48 image to 16x16 instead of taking the 16x16 image. Is there a way...more >>

hello. how do you check if a file (say, a txt one) is being used by another process? thanks. -- Xero http://www.chezjeff.net My personal web portal...more >>

I want to draw a picture on the right hand side of the printer so in printdocument I have Dim newImage As Image = Image.FromFile(sLogoFile) ' Create Point for upper-left corner of image. Dim ulCorner As New Point(e.MarginBounds.Lef...more >>

I want to use the Directory.Exists method to see if a directory exists. But it doesn't seem to work for the root of a removable (USB) drive. I plug in my drive and it gets allocated a letter ("F:"). I then confirm that I can view the drive in Windows Explorer but: Directory.Exists("F:\") ...more >>

Is there better way to convert integer type date into DateTime type date as doing like code below? Dim intDate As Integer = 20051019 Dim dte As DateTime = New DateTime( _ CType(intDate.ToString.Substring(0, 4), Integer), _ CType(intDate.ToString.Substring(4, 2), Integer), _ CType(intDate....more >>

knowlegeable people: i uninstalled msdn completely, and also deleted every registry value i could find for msdn, and also deleted the directory in c:\program files\msdn. this should give me a clean install, right? no. F1 help still does not work. I found a knowlegebase article that says t...more >>

Hello again, Can anyone tell me the correct connection string to use? My database is on the E: drive of a remote server. I can either map a drive from my local machine to it, or use the \\servername\ stuff. I can't seem to get it right. thanks, Art...more >>

This is probably pretty easy, but how does one determine if a control is a CONTAINER control? I thought something like If Typeof myControl is ContainerControl then .... would work but that seems to always return FALSE. Thanks. Tom -- ...more >>

Hi all, I have a little task here and I am looking for input from fellow programmers as to what the best approach is to accomplish it: I need to setup an e-mail box that will receive requests from people. The e-mail will contain certain key information that will allow me to pull informat...more >>

I've been told that how one does a loop in VB .NET cna have significant speed differernces. For example: dim therows() as datarow ..... dim row as datarow for each row in therows ..... next row ------------------------ vs. ----------------------- dim therows() as datarow ..... dim ...more >>

I'm sure this is something pretty trivial but can't seem to figure out how to do it. I'm using Generic Lists in quite a few places in my app and for some of them want to be able to create a ToString method that would return a formatted string array. For example, I might have a simple cla...more >>

Hi, I am trying to create a form and add some controls to it programmatically. I am pasting the code I have so far, below. here are the issues I am having. #1. I am having to subtract additional 35 points from the closeAbuotButton.Top ot the control goes out of form's bounds. I have no c...more >>

does anyone have a good method or technique for saving the order of columns that someone rearranged them to and restoring that order on the applications next load? ...more >>

I'm starting a small application to get my feet wet with Test Driven Development. I understand the mechanics of setting up NUnit, but I'm not sure what types of tests I should be writing. The app is an 'issue tracker' that pulls it's data from a SQL Server database. The user will be able t...more >>

Hi Guys, I was brought in at the last moment to try to get a project completed. it's vb.net and crystal reports. Here's the problem I can populate a parameter list for a report so the user can choose one / all Suppliers. When a parameter option from the combo box is clicked that came f...more >>

hey all, i have an Access Database with about 43,000 records in it. I need to take 2 or 3 columns and modify them and update the database. currently what i'm doing is loading all into a dataset and making changes and pushing it back up to the database. it seems kind of a long process about...more >>

If I create several controls (images) at run time, how can I handle the click event of this controls. Thanks in advance, Luis Mendes...more >>

Hello I am using the output method of AxMsCommLib of vb6 in vb.net to send things on the com port and it works just fine Is there a way to get - Listen the com port too by using this object (AxMsCommLib) ? Or any Other object in vb.net Thanks a lot Savvas ...more >>

Hello, I am a beginner to VB.NET. Here is my question: I currently have my SQL INSERT and UPDATE functions in my form. I'm trying to clean up the code on my form, and use modules for database functions if possible. The problem is - When I cut and paste the SQL code into the module, the...more >>

How is the best way to avoid validation when closing a window? For instance, I have a Windows Forms window which has a validation event for a text box. However, if one enters invalid data in then and then attempts to close the window (either via my custom 'Close' box or by clicking the close 'X...more >>

Hi, I've written the following, inspired by a MSDN article. First I want to know if what I do is correct. The reason I'm asking is because if the value passed to CalcPi is great(eg.10000) then I can't interact with the UI anymore (resize window, move window...) Second, I don't know how to close...more >>

Hello Guys I just wanted to know for writing GDI+ based applications why are most of the examples are provided in C#? Is it that the features available in C# related to GDI+ are not supported by VB.NET. Regards Rohan...more >>

Hello I have a dll that was built in vb6 or vc++/6 and i have a problem when i try to reference it in vb.net, I am getting an error "This is not a valid assebly or Com componet" although is valid in vb6. Can anyone help me please? ...more >>

I having trouble with the keyword "ArraySubType" in Visual basic studio = beta 2. I got "Error 1 Name 'ArraySubType' is not declared. Test.vb 1061 4 ..." for ' array TO COM LPStr Public Function etst(ByVal iCnt As Integer, _ <MarshalAs(UnmanagedType.LPArray, _ ArraySubType =3D Unmanag...more >>

Hi all, I have a string variable within a user control that contains the name of a datagrid control that I want to act on from within my user control. What I want to achieve is to have the same code within my user control to call the same methods on whatever datagrid is relevant. But the rel...more >>

Does anyone know if I can get rid of this folder? I don't use macros so you can say I don't need this folder. My project folder looks more messy with this folder inside. Hope you can understand when it comes to organizing folders and files. Boo K.M. ...more >>

Hi All, A week ago I posted a question regarding how to store 2 value (but display 1) in an combo box item, I can do it quite easily thru the itemdata property in VB6 but this is not avaliable in .net, James and Herfried provided a sample code as follow, I have few more questions after the ...more >>