manipulating individual rows inside a datagrid..

slaverymorgue · February 19th, 2007, 12:25 AM

Hi all..

I need help with a function that I have written for a selectedindexchange event of a drop down list which is embedded inside a datagrid..

The source code i have written is as below :

Code:

Protected Sub toSectDDL_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim row As DataGridItem
            For Each row In SectionGrid.Items
            Dim toSectDDL As DropDownList = CType(sender, DropDownList)
            Dim toSubSectDDL As DropDownList = CType(row.FindControl("toSubSectDDL"), DropDownList)
          Dim toSectID As Integer = CInt(toSectDDL.SelectedValue)
            Utilities.LogError("toSectID " & toSectID)
            toSubSectDDL.DataSource = Office.GetSubSectionsForSection(toSectID)
            toSubSectDDL.DataTextField = "subsection"
            toSubSectDDL.DataValueField = "subSecID"
            toSubSectDDL.DataBind()
            toSubSectDDL.Items.Insert(0, New ListItem("Select", "0"))
             Next
    End Sub

The thing is when i use row.FindControl the toSectDDLs in all the rows of the datagrid are affected whereas i want to manipulate the drop down list only on a single row.. When I try using SectionGrid.FindControl instead of the row.FindControl I get a server error saying "Object reference not set to an instance of an object. "

So anyone has any ideas plz do contribute......:(

Thanks..