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Nested gridview select All

Posted on 2009-07-06
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Last Modified: 2012-06-27
I have a gridview within a gridview.

I want to be able once selecting the inner gridview to select all the items via a checkbox in the header template.

I was using http://www.aspboy.com/Categories/GridArticles/Hierarchical_GridView_With_Clickable_Rows.aspx asa a basis for my code.

Iv'e tried the following code to see if i could figure it out but it does not recognise my cbAll (the checkbox in the headertemplate of the child gridview)
Protected Sub cbAll_CheckChanged(ByVal s As Object, ByVal e As EventArgs)

        Dim blnChecked As Boolean = False

 

 

        For Each gvRow As GridViewRow In gvParent.Rows

            '// get the checkboxed items for the assets

            Dim gvChildAsset As GridView = (DirectCast(gvRow.FindControl("gvChildAssets"), GridView))

            '// for each of the rows in the child task gridview

            ' For Each dc System.web.DataControlField in gvchildasset.columns

            For Each dc As DataControlField In gvChildAsset.Columns

                If TypeOf dc Is TemplateField Then

                    Dim cbAll As CheckBox = (DirectCast(gvChildAsset.FindControl("cbAll"), CheckBox))

                    If isNull(cbAll) Then Continue For

                    If cbAll.Checked Then

                        blnChecked = True

                        Exit For

                    End If

                End If

            Next

 

            For Each gvChildAssetRow As GridViewRow In gvChildAsset.Rows

                Dim cb As CheckBox = (DirectCast(gvChildAssetRow.FindControl("cb"), CheckBox))

                If isNull(cb) Then Continue For

                If blnChecked Then

                    cb.Checked = True

                End If

            Next

        Next

    End Sub

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Question by:ddl_ex5
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3 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 24794043
It looks like you are calling FindControl from the GridView, but you need to call it from the GridViewRow.

GridViewRow line:

     Dim gvChildAsset As GridView = (DirectCast(gvRow.FindControl("gvChildAssets"), GridView))
 
GridView line:

     Dim cbAll As CheckBox = (DirectCast(gvChildAsset.FindControl("cbAll"), CheckBox))

The second line needs to be more like the first line.
 
0
 

Author Comment

by:ddl_ex5
ID: 24803342
Putting
Dim cbAll As CheckBox = (DirectCast(gvChildAsset.FindControl("cbAll"), CheckBox)) into a for each loop for the childAsset row does not work.  This was my first attempt before i got the checkbox of cbAll to be located.

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LVL 96

Accepted Solution

by:
Bob Learned earned 500 total points
ID: 24803445
I guess that I didn't make myself clear enough.  You need to use FindControl with a row from gvChildAsset, not the GridView itself.

Example:
    Dim cbAll As CheckBox = TryCast(gvChildAsset.Rows(0).FindControl("cbAll"), CheckBox)
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