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02.05.2008 at 04:44PM PST, ID: 23139971
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Populate GridView template control (label) when LinkButton clicked

Asked by alanwarren in Programming for ASP.NET, Microsoft Visual Studio Express

ASP .Net 2.0

Scenario:
I have a gridview, paging is enabled, page size 2
In the gridview  <Columns> is a <asp:TemplateField> containing an <ItemTemplate>
In the <ItemTemplate> there are various LinkButton controls wired to VB Subs, each having CommandNames and CommandArguments

The ItemTemplate uses HTML table with a <TFOOT> element  
In the TFOOT I have an asp:Label with an ID of LabelErrorMessage, see code snippet # 1

The problem:
When my LInkButton fires and the associated code is invoked, (see code snipet #2)
I want to populate the associated  Label in the GridViewRow with any message returned by code that is fired when the LinkButton is clicked

Currently my code returns a msgbox  output saying "objGV is Nothing"

I had it working yesterday, but it twas the Label in the first ROW of the GridView Page that was being populated, even if I clicked the LinkButton in the second ROW, hmmm.

Anyhow hope this has not been too long-winded...

Any suggestions?

Alan ";0)Start Free Trial 
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Snippet # 1
========================================
<ItemTemplate>
  <table>
   <tfoot>
    <tr>
      <td colspan=6 nowrap=nowrap style="color:DarkRed;font-size:small;background-color:#fffff4;border:solid 1px Red; text-align:center;">
        <asp:Label 
        ID = "lblErrorMessage"
        runat = "server"
        EnableViewState = "False"
        Text = "Label"
        Visible = "False"
            >
        </asp:Label>
      </td>
    </tr>
    </tfoot>
  </table>
</ItemTemplate>              
</asp:TemplateField>
========================================
 
Snippet # 2
========================================
    Sub LinkBtn_SVK_Click(ByVal sender As Object, ByVal e As CommandEventArgs)
 
        Dim objLabel As Label = Nothing
        Dim strErrMsg As String = String.Empty
        Dim objGV As GridView = CType(FindControl("GridViewBrowseMemberProfiles"), GridView)
 
 
        If objGV IsNot Nothing Then
            Dim objGVRows As GridViewRowCollection = objGV.Rows
            For Each objRow As GridViewRow In objGVRows
                objLabel = CType(FindControl("lblErrorMessage"), Label)
                If objLabel IsNot Nothing Then
                    strErrMsg = "Hello world"
                    With objLabel
                        .Text = strErrMsg
                        .Visible = True
                    End With
                Else
                    MsgBox("objLabel is Nothing")
                End If
            Next
        Else
            MsgBox("objGV is Nothing")
        End If
 
 
        objLabel = Nothing
 
 
    End Sub
====================================
[+][-]02.05.2008 at 08:05PM PST, ID: 20829402

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[+][-]02.06.2008 at 12:00AM PST, ID: 20830270

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Zones: Programming for ASP.NET, Microsoft Visual Studio Express
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Solution Provided By: NazoUK
Participating Experts: 1
Solution Grade: A
 
 
[+][-]02.06.2008 at 01:26PM PST, ID: 20835915

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