Visual Basic

11-May-07 18:06

It's funny how many people ask vague/unanswerable questions nowadays and never respond when you ask for more info....

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

setup in vb.net 2005

Sonia Gupta11-May-07 2:17

11-May-07 2:17

What are the various aspects that can be considered to check whether my program is installed on the machine.
I mean if i am naming my setup as setup1 .... then it is possible to create an another setup which will have same name
in the control panel u will find
setup1
setup1
two times.

Christian Graus11-May-07 2:32

11-May-07 2:32

First of all, name your setup program after your application. Then, you shouldn't have any issues.

If I want to check if my app exists, I create a registry key within the app, that I can then check for on the machine.

Sonia Gupta11-May-07 19:14

11-May-07 19:14

Thank You

kubben11-May-07 3:08

kubben

11-May-07 3:08

It is all based off the productcode and upgradecode. You can name your install programs both setup as long as you don't store them in the same directory and have separate setup projects for each.

Take a look at an article I wrote, it might be helpful.
http://www.codeproject.com/dotnet/Win_App_Setup_Project.asp[^]

Ben

Sonia Gupta11-May-07 19:14

how to solve this error in vb.net code?

11-May-07 19:14

Thank You

sathyan_829411-May-07 1:29

sathyan_8294

11-May-07 1:29

For Each dg As DataGrid In DataGrid1.DataBindings
Dim cb As CheckBox = CType(dg.Item.Controls(1), CheckBox)
If cb.Checked Then
Dim id As Integer = Convert.ToInt16(dg.Item.Text)
endif
the above code is vb.net windows application code.
when i run the above code,the following error is shown.
"Overload resolution failed because no accessible 'Item' accepts this number of arguments"
this error shown in dg.item (2nd and 4th line).this code is for edit.how to solve this.can u send other vb.net windows apllication code for edit a record in datagrid.

Re: how to solve this error in vb.net code?

Christian Graus11-May-07 1:40

Re: how to solve this error in vb.net code?

11-May-07 1:40

Your code all the way though assumes that it's cast operations will work. Write code that is more defensive, step through it in the debugger, and you will probably see what the problem is.

Dave Kreskowiak11-May-07 3:42

Dave Kreskowiak

11-May-07 3:42

This code has so many problems on so many levels, it's hopeless to try and save it.

You said you wanted to change the status of a field in the data that this grid is showing? You don't do that in the DataGrid, you do it in the DataSet, or DataTable, or whatever else this grid is bound to.

Think of it this way. The DataGrid show you a view of your data, it doesn't hold the actual data it's showing you.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

DataGridView Readonly Question

_mubashir11-May-07 0:50

_mubashir

11-May-07 0:50

Hi All,
I am working with VS.NET 2005 datagridview. For the past 2 hours i have been screwed up by this grid behavior. I have 12 columns in my datagridview and I want 1 of them (which is checkbox) to be editable like user can check/uncheck it. When I bound the grid to datasource (dataset), it will not allow me to check/uncheck the checkbox column. I debug it and it shows the column readonly property set to false which is OK, but why it didnt allow me to edit it. Same happens in Virtual mode of the grid.
Do you have any idea how can I make columns editable in normal and virtual mode with Bound columns?

Thanks,

Mubashir
Software Architect
Storan Technologies Inc, USA
Every job is a self portrait of the person who did it.

Re: DataGridView Readonly Question

Dave Kreskowiak11-May-07 3:38

Dave Kreskowiak

11-May-07 3:38

Did you set the DataGridView.ReadOnly property to True?

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

Re: DataGridView Readonly Question

_mubashir11-May-07 6:07

_mubashir

11-May-07 6:07

No the readonly property is set to false. And I have set ReadOnly property for each column

Mubashir
Software Architect
Storan Technologies Inc, USA
Every job is a self portrait of the person who did it.

Re: DataGridView Readonly Question

_mubashir11-May-07 8:05

_mubashir

11-May-07 8:05

Got it...fixed. I have the following set in my designer file

Me.dgMember.RowTemplate.ReadOnly = true

Not how that set up
Thanks anyways..

Mubashir
Software Architect
Storan Technologies Inc, USA
Every job is a self portrait of the person who did it.

drag and drop problem... vb .net

daxfrost11-May-07 0:09

11-May-07 0:09

Please can someone tell me how to drag a file from my explorer window on my form and load the file into a rich text box that i have created at runtime? thank you, in advance

PandemoniumPasha11-May-07 0:59

PandemoniumPasha

11-May-07 0:59

hi,
to do this, you need to set the allowdrop porperty of the control to true.
then you need to write two event-handlers to handle the events fired when you do drag & drop operation.

below is a code sample in C# but you can easily convert it to VB

//you need to set the property and assign eventhandlers
this.richtextbox1.Allow = true;
this.richtextbox1.DragDrop += new DragEventHandler(richtextbox1_DragDrop);
this.richtextbox1.DragEnter += new DragEventHandler(richtextbox1_DragEnter);

//then write the event handlers
private void richtextbox1_DragEnter(object sender, DragEventArgs e)
{
if(e.Data.GetDataPresent(DataFormats.FileDrop))
{
e.Effect = DragDropEffects.Copy;
}
else
{
e.Effect = DragDropEffects.None;
}
}

private void richtextbox1_DragDrop(object sender, DragEventArgs e)
{
if(e.Data.GetDataPresent(DataFormats.FileDrop))
{
string[] file = (string[])e.Data.GetData(DataFormats.FileDrop);
fileName = file[0];
//Now that you have the file name of the file, you can read it and display its contents
}
}

hope this helps.
regards
Smile | :)

Sonia Gupta11-May-07 1:11

11-May-07 1:11

on formload
textbox1.dragdrop=true

Private Sub TextBox1_DragDrop(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles TextBox1.DragDrop<br />
        If (System.IO.File.Exists(CType(e.Data.GetData(DataFormats.FileDrop), Array).GetValue(0).ToString()) = True) Then<br />
            If (System.IO.Path.GetExtension(CType(e.Data.GetData(DataFormats.FileDrop), Array).GetValue(0).ToString()) = ".txt") Then<br />
                TextBox1.Text = System.IO.File.ReadAllText(CType(e.Data.GetData(DataFormats.FileDrop), Array).GetValue(0).ToString())<br />
            Else<br />
                MessageBox.Show("select the .txt extention file")<br />
            End If<br />
<br />
        End If<br />
    End Sub<br />
<br />
    Private Sub TextBox1_DragEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles TextBox1.DragEnter<br />
        If (e.Data.GetDataPresent(DataFormats.FileDrop)) Then<br />
            e.Effect = DragDropEffects.Copy<br />
        End If<br />
    End Sub

Hope this may help You. Smile | :)

daxfrost11-May-07 1:28

11-May-07 1:28

Thanks for the code... technically that should work, but I create my rich text box at runtime, so i cant call its events, or atleast... i am unsure of how to! Confused | :confused:

please help? thanx guys!

Sonia Gupta11-May-07 1:31

11-May-07 1:31

DaxBooysen wrote:
i am unsure of how to! please help?

replace textbox with Richedittextbox
Actually i tried it with textbox.It is very simple. replace textbox with richedittextbox

daxfrost11-May-07 1:40

11-May-07 1:40

I have no problem with that, its the fact that i create it at RUNTIME... i dont place it on my form at design time, so when i try make an event for a text box that has not been created yet i cant! know what i mean? thanx again! Confused | :confused:

Sonia Gupta11-May-07 1:50

11-May-07 1:50

ok What code u r writing?

daxfrost11-May-07 1:57

11-May-07 1:57

i create a rtf box in many places and set it as a child control of a tab control... but i call it up like this when i want to change its values...

<br />
  <br />
    Dim rtf As New RichTextBox()<br />
    rtf = TABS.TabPages(TABS.SelectedIndex).Controls.Item(0)<br />
<br />

and so you see... since its created at runtime... how do i call its events? thanx,

dax Smile | :)

Sonia Gupta11-May-07 2:04

11-May-07 2:04

then write the code on each control which is provided to u.

Christian Graus11-May-07 2:33

11-May-07 2:33

DaxBooysen wrote:
Dim rtf As New RichTextBox()
rtf = TABS.TabPages(TABS.SelectedIndex).Controls.Item(0)

Doesn't this create a control, then discard it for one that's already within the tab page ?

Either way, you can attach events to a control in code, at least you can in C#.

Dave Kreskowiak11-May-07 3:36

Dave Kreskowiak

11-May-07 3:36

If you create a control at runtime, you have to wire up the events yourself at runtime, just like the designer generated code does when you drop a control on the form.

Lookup AddHandler and RemoveHandler on MSDN and it'll show you how to do this...

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007

daxfrost11-May-07 6:07