I have 2 user controls on my page.
One is used for searching, and
the other is used for editing (along with a few other things).
The user
control that provides
the search functionality uses a GridView to display
the search results. This GridView has a CommandField used for editing (showEditButton="true").
I would like to place
the GridView into an UpdatePanel so that paging through
the search results will be smooth.
The thing is that when
the user clicks
the Edit Link (the CommandField) I need to preform a full page postback so that
the search user
control can be hidden and
the edit user
control can be displayed.
Edit:
the reason I need to do a full page postback is because
the edit user
control is outside of
the UpdatePanel that my GridView is in. It is not only outside
the UpdatePanel, but it's in a completely different user
control.
I have no idea how to add
the CommandField as a full page postback trigger to
the UpdatePanel.
The PostBackTrigger (which is used to indicate
the controls cause a full page postback) takes a ControlID as a parameter; however
the CommandButton
does not have an ID...and you can see why I'm having a problem with this.
Update on what else I've tried to solve
the problem:
I took a new approach to solving
the problem.
In my new approach, I used a TemplateField instead of a CommandField. I placed a LinkButton
control in
the TemplateField and gave it a name. During
the GridView's RowDataBound event I retrieved
the LinkButton
control and added it to
the UpdatePanel's Triggers.
This is
the ASP Markup for
the UpdatePanel and
the GridView
<asp:UpdatePanel ID="SearchResultsUpdateSection" runat="server">
<ContentTemplate>
<asp:GridView ID="SearchResultsGrid" runat="server"
AllowPaging="true"
AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<HeaderTemplate></HeaderTemplate>
<ItemTemplate>
<asp:LinkButton ID="Edit" runat="server" Text="Edit"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField ......
</Columns>
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
In my VB.NET code. I implemented a function that handles
the GridView's RowDataBound event. In this method I find
the LinkButton for
the row being bound to, create a PostBackTrigger for
the LinkButton, and add it to
the UpdatePanel's Triggers. This means that a PostBackTrigger is created for every "edit" LinkButton in
the GridView Edit: this did not create a PostBackTrigger for Every "edit" LinkButton because
the ID is
the same for all LinkButtons in
the GridView.
Private Sub SearchResultsGrid_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles SearchResultsGrod.RowDataBound
If e.Row.RowType = DataControlRowType.Header Then
''I am doing stuff here that
does not pertain to
the problem
Else
Dim editLink As LinkButton = CType(e.Row.FindControl("Edit"), LinkButton)
If editLink IsNot Nothing Then
Dim fullPageTrigger As New PostBackTrigger
fullPageTrigger.ControlID = editLink.ID
SearchResultsUpdateSection.Triggers.Add(fullPageTrigger)
End If
End If
End Sub
And instead of handling
the GridView's RowEditing event for editing purposes i use
the RowCommand instead.
Private Sub SearchResultsGrid_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles SearchResultsGrid.RowCommand
RaiseEvent EditRecord(Me, New EventArgs())
End Sub
This new approach didn't work at all because all of
the LinkButtons in
the GridView have
the same ID.
After reading
the MSDN article on
the UpdatePanel.Triggers Property I have
the impression that Triggers can only be defined declaratively. This would mean that anything I did in
the VB code wouldn't work.
Any advise would be greatly appreciated.
Thanks,
-Frinny
