Question

VB.NET 2.0 DATAGRIDVIEW INDEX VALUES

Asked by: jaydwest

I'm totally confused in using a bound DataGridView control.  I have a Windows Form with a bound DataGrid View.  I'm doing some testing with it because it doesn't seem to  behave the way I would expect.  I'm using the  DataGridView1_RowEnter event.  I've added a message box on the event that displays the dvg.rowcount, the currentrow.index, and isNewRow.  THe dvg has two rows of data displayed and a blank new row (have set allow adds)

When I initially click on row 1, i get 3 rows, 0 index, IsNewRow = false. This is correcdt.  then I click on row 2, I get 3 rows, 0 index, IsNewRow= false.  This is not correct the index (I assume this is the row index should be 1).  Then I click in the blank row at the end  I get 3 rows, Index =1, IsNewRow = false (This is wrong, index should be 2 and IsNewRow should be true).  BUT THEN I click on the first row again and I get rows = 3, Index = 2, IsNewRow = true (this is wrong, Index should be 0, IsNewRow should be false).  

It appears that the index property is set to the expected value before the row is entered.  OK the code should fire before the event.  Is there an event after row_enter that fires, that I can use?

Thanks for your help.




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Asked On
2008-05-08 at 08:41:34ID23386487
Tags

VB.net 2.0, Visual Basic 2005, Windows Forms

Topics

Visual Studio

,

Microsoft Visual Basic.Net

Participating Experts
1
Points
250
Comments
5

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Answers

 

by: SanclerPosted on 2008-05-08 at 12:23:29ID: 21527659

You want to use the e.RowIndex to get reports on the status of the row being entered because it does not become the .CurrentRow until after this sub has fired.  See below.

Roger

    Private Sub DataGridView1_RowEnter(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.RowEnter
        If Not DataGridView1.CurrentRow Is Nothing Then
            Debug.WriteLine("CurrentRow = " & DataGridView1.CurrentRow.Index)
        End If
        Dim dgvr As DataGridViewRow = DataGridView1.Rows(e.RowIndex)
        Debug.WriteLine("Row entered = " & dgvr.Index)
        Debug.WriteLine("New Row = " & dgvr.IsNewRow)
    End Sub

                                              
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by: jaydwestPosted on 2008-05-08 at 12:42:11ID: 21527811

Sancler,

As always thanks.  After I posted my question, I found that the cellEnter did what I need.  Do you know of any documentation that shows event sequences for various objects?

 

by: SanclerPosted on 2008-05-08 at 15:31:16ID: 21529009

>>
Do you know of any documentation that shows event sequences for various objects?
<<

Unfortunately, no.  I seem to recall that, in a couple of places in the help files, I've seen lists for particular objects.  But I'm afraid I can't now remember which those objects are or where the lists are ;-(

At a general level, however (although not much use in this particular case), there is a topic "Order of Events in Windows Forms".  For VB.NET 2005, it's here

http://msdn.microsoft.com/en-us/library/86faxx0d(VS.80).aspx

Roger

20120131-EE-VQP-002

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