I have a GridView with BoundField , and I want to access it value when GridView row is selected:
<asp:GridView ID="grvCascadeRulesTemplates" runat="server" AutoGenerateColumns="False" DataKeyNames="CascadeRuleKey" DataSourceID="odsCascadeRulesTemplates">
<Columns>
<asp:CommandField ShowSelectButton="True"
SelectText="Show Values">asp:CommandField>
<asp:BoundField DataField="CascadeRuleKey" HeaderText="CascadeRuleKey" ReadOnly="True"
SortExpression="CascadeRuleKey" />
<asp:BoundField DataField="SourceTable" HeaderText="Source Table" SortExpression="SourceTable" />
Columns>
asp:GridView>
Protected Sub grvCascadeRulesTemplates_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles grvCascadeRulesTemplates.SelectedIndexChanged
DebugHelper.PrintChildren(grvCascadeRulesTemplates.SelectedRow)
End Sub
I have valid SelectedRow , but I didn't find a way to easily get reference to control in the BoundField.
I don't want to hardcode access the individual cells of the GridViewRow object by using the Cells property with numeric (non-mnemonic) index.. I can not use the FindControl method , because the control doesn't have an ID.
The possible solutions that I found (from some places including here) are:
1. Convert column to template and add an ID to be able use FindControl. Quite simple, but adds more markup code that I actually need.
2. Add my data column to DataKeyNames - should work, but my data field is not part of primary key, so it is confusing.
3. Search GridView.Columns by my ColumnName to find index of the cell. I preferred it.
DataControlFieldCollection doesn't provide Find method and furtermore the base class DataControlField doesn't have ID or Name property, so I have to search by FooterText , HeaderText or SortExpression. Alternatively I can cast DataControlField to BoundField and use DataField.
I choose SortExpression as it is less likely to change and should be the same as DataField.
I've included helper functions CellBySortExpression,ColumnBySortExpression, GetColumnValueBySortExpression into my WebFormsHelper class
posted @ Thursday, August 31, 2006 2:13 PM