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Get a value from a gridview cell

Experts,

Newbie question:

I cannot get a value from a cell in a gridview. The gridview loads properly. The first column is a template column with a checkbox. I am able to check whether the user selects the checkbox or not. But I am unable to get any vaule from any other cells in that row.

I try to use: gridview1.SelectedRow.Cells(2).Text to get the value I want.
I get a NullReference Exception was unhandled by user code error.

The gridview has 6 columns. The first is the checkbox column and the other 5 all have data populated in them.

Death259

First make sure that you have the gridview selectionmode property set to FullRowSelect. This is what the code should look like in c# (dunno if this part will really help you or not):

dataGridView1.SelectedRows[0].Cells[2].FormattedValue.ToString()

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masterpass

Try this

For iRow As Integer = 0 To GridView1.Rows.Count - 1
    Dim chkBox As New CheckBox()
    chkBox = DirectCast(GridView1.Rows(iRow).FindControl("mycheckbox"), CheckBox)
    If chkBox.Checked Then
        string str = Gridview1.Rows(iRow).Cells(1).ToString()
    End If
Next

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HainKurt

put a breakpoint on this line
add this to watch "gridview1.SelectedRow.Cells", browse all properties to understand it

and open immediate window and put

?gridview1.SelectedRow.Cells
?gridview1.SelectedRow.Cells.Count
?gridview1.SelectedRow.Cells(0).Text
?gridview1.SelectedRow.Cells(1).Text
?gridview1.SelectedRow.Cells(2).Text

jvoconnell

ASKER

HainKurt:

I get "Referenced object has a value of 'Nothing' in the intermdiate window

HainKurt

when you add this to watch

gridview1.SelectedRow
or
?gridview1.SelectedRow

you get nothing... means no row is selected...

HainKurt

maybe you should use this

Dim index As Integer = gridview1.EditIndex
Dim row As GridViewRow = gridview1.Rows(index)

then use

row.Cells(2).Text

jvoconnell

ASKER

Am I making an incorrect assumption that when the checkbox is checked that the row is "selected"?

HainKurt

;) no it is not selected...

check this sample

http://www.codedigest.com/Articles/ASPNET/132_GridView_with_CheckBox_%E2%80%93_Select_All_and_Highlight_Selected_Row.aspx

ASKER CERTIFIED SOLUTION

HainKurt

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HainKurt

also check this

http://groups.google.com/group/microsoft.public.dotnet.framework.aspnet/browse_thread/thread/6e29b371de01b72f?hl=en

to select a row with a check box, actually when you click checkbox you will do a post back to select that row...
just another approach...

jvoconnell

ASKER

This is it!!!! Thank you for all of the assistance. It is very much appreciated.