findcontrol in form1 template

[Matt]

I am trying to assign a value to a textbox control on a form and use the following code.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim txtusername As TextBox

txtusername = FormView1.FindControl("username")

txtusername.Text = getIdentity()

End Sub

Public Function getIdentity() As String

getIdentity = (User.Identity.Name)

End Function

The function works fine but I get the error - Object reference not set to an instance of an object when I try to run it.

This will work fine if I drag a textbox onto the page but just not when it is in a form template.

I am extremely new to vb.net and am using vwd 2005.

Any help would be greatly appreciated.

[Peter]

Hi Matt,

Please try replacing this line of code:

txtusername = FormView1.FindControl("username")

with

txtusername = FormView1.TemplateName.FindControl("username")

where TemplateName is the form template control that you mention bellow.

Let me know if this helps.

Best wishes,
Peter
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Matt]

No luck. When I add "InsertItemTemplate" which is the name of the template , the only option available in intellisense is InstantiateIn.
I also tried me.form1.findcontrol. No errors pop up but I still get the same result.

[Kevin]

Matt,

Can you paste your FormView ASPX declaration and where your TextBox is located? This will surely provide additional clues.

[Matt]

<InsertItemTemplate>

username:<asp:TextBox ID="username" runat="server" Width="100px" OnDataBinding="Page_Load"></asp:TextBox><br />

</InsertItemTemplate>

 

[Kevin]

I've just tried this setup and it worked fine. Maybe you have not set the DefaultMode property of the FormView to "Insert" ?

 <asp:FormView ID="FormView1" runat="server" DefaultMode="Insert">
            <InsertItemTemplate>
                username:<asp:TextBox ID="username" runat="server" Width="100px"></asp:TextBox><br />
            </InsertItemTemplate>            
        </asp:FormView>
 
 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim textBox As TextBox = CType(FormView1.FindControl("username"), TextBox)
        textBox.Text = "Some Name"
    End Sub

[Matt]

That worked. Thanks a lot.

If I wanted to keep the page where the edit template shows first and then if the insert  button is clicked it will take you to the insertitem template and have the same function happen, would that be possible?

[Kevin]

I guess you can do this in the ForeView.ModeChanged event, checking for the current mode of the ForView, e.g.

  Protected Sub FormView1_ModeChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.ModeChanged
        If FormView1.CurrentMode = FormViewMode.Insert Then
            Dim textBox As TextBox = CType(FormView1.FindControl("username"), TextBox)
            textBox.Text = "Some Name"
        End If
    End Sub