I'm working on a feature using a gridview that has this requirement:

> determine an item template label value
> by performing a function
> that takes as input
> two other item template label values.

I'm thinking the way to make this work is based on the type of construct shown below (The function would be different in the actual feature). This test case works with labels 1,2, and 4. However, I don't know the right syntax for Label 5, where I attempt to use two of the other label values as input to the function.

Any help with how to solve this problem would be appreciated.

Thanks!

=================
Public Function TestFunction(ByVal varA, ByVal varB)
       Return varA & varB
End Function
=================

<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text= '<%# DataBinder.Eval(Container.DataItem, "Field1") %>'></asp:Label>
 <asp:Label ID="Label2" runat="server" Text= '<%# DataBinder.Eval(Container.DataItem, "Field2") %>'>
</asp:Label>
<asp:Label ID="Label4" runat="server" Text= '<%# TestFunction("Hi ", "There") %>'></asp:Label>

<asp:Label ID="Label5" runat="server" Text= '<%# TestFunction((Container.DataItem, "Field1"),(Container.DataItem, "Field2")) %>'></asp:Label>

</ItemTemplate>
=================

I would use the ItemDataBound event of the gridview.

Get a refence to each label. Then call the function with the text of the labels(params) and set that result to the text of the result label.

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
        If e.Row.RowType = DataControlRowType.DataRow Then
            Dim lbl1, lbl2, lbl4, lbl5 As New Label
            lbl1 = e.Row.FindControl("Label1")
            lbl2 = e.Row.FindControl("Label2")
            lbl4 = e.Row.FindControl("Label4")
            lbl4.Text = TestFunction("Hi", "There")
            lbl5 = e.Row.FindControl("Label5")
            lbl5.Text = TestFunction(lbl1.Text, lbl2.Text)
        End If
    End Sub

Jim

Thanks for the response. That looks just right. 'Preciate it!

No problem.. hope it works for you

I think it was the right direction, but I couldn't get the find controls to come up with anything, through several variations.

This code in Gridview_RowDataBound:
-----------
If e.Row.RowType = DataControlRowType.DataRow Then
Debug.WriteLine(e.Row.Cells.Count & " " & e.Row.Cells(0).Controls.Count) in Gridview_RowDataBound
-----------
says 1 cell and 5 controls. The one cell is correct,
but I've got 3 html image buttons, 4 visible asp labels, and 3 hidden fields in the itemtemplate, and they show up in the DHMTL when the page is rendered, as being within the cell.

Another way might be to go through e.Row.DataItem, but I don't know the syntax there, either.

Any other thoughts?

Thanks!

   If you have the label names as you described in your original post, and they are in a template column, my code will work. As for the HTML controls, you will not be able to access them that way, unless you convert them to server controls using runat="server" in the HTML.

Thanks for the message. I'll play with the findcontrols some more.

FYI, I've found an alternate solution to the particular need I had, of the form

<asp:Label ID="Lvl" runat="server" cssClass="indent01"
Width='<%# (GetIndentWidth(Container.DataItem("Lvl"))) %>' Text= ' '>

So, given my overly driven development cycle, I may not be testing your particular approach anytime soon. However, I appreciate the suggestion; prompts are helpful and this one led me to learn some things about _RowDataBound. I expect I'll be finding other needs in this area later in the dev cycle, so I look forward to getting .FindControl to work then. Cheers!

Glad to help.. The code is useful..I use it often for datagrids and other controls of that type..

Good luck...

Jim