problem with FindControl

[Terry]

Hi,

i want to access control "TextBox1" embedded in another control "LoginView1"
in order to change the 'Text' of the textbox.

Therefore i use 'FindControl' method but i get error:
"Object reference not set to an instance of an object" on line: tb =
lv.FindControl("textbox1")
Thanks for help
Cliff
aspx:
----
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1"
Runat="Server">
<table>
<asp:LoginView ID="LoginView1" runat="server">
<LoggedInTemplate>
<fieldset style="height: 425px; width: 335px;">
<tr><td>
<asp:TextBox ID="TextBox1" runat="server" Text=""></asp:TextBox>
</td></tr>
</fieldset>
</LoggedInTemplate>
</asp:LoginView>
</table>
</asp:Content>

code-behind:
-----------
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load
Dim lv As LoginView
Dim tb As TextBox
lv = FindControl("loginview1")
tb = lv.FindControl("textbox1")
tb.Text = "ok"
end sub

[Teemu Keiski]

If you are running this on the content page, you don't need tom FindControl
the LoginView. You can just

Dim tb As TextBox
tb = Me.LoginView1.FindControl("textbox1")
tb.Text = "ok"

--
Teemu Keiski
AspInsider, ASP.NET MVP
http://blogs.aspadvice.com/joteke
http://teemukeiski.net

"Terry" <[e-mail] in message
news:eU**************@TK2MSFTNGP04.phx.gbl...

Hi,

i want to access control "TextBox1" embedded in another control
"LoginView1" in order to change the 'Text' of the textbox.

Therefore i use 'FindControl' method but i get error:
"Object reference not set to an instance of an object" on line: tb =
lv.FindControl("textbox1")
Thanks for help
Cliff
aspx:
----
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1"
Runat="Server">
<table>
<asp:LoginView ID="LoginView1" runat="server">
<LoggedInTemplate>
<fieldset style="height: 425px; width: 335px;">
<tr><td>
<asp:TextBox ID="TextBox1" runat="server" Text=""></asp:TextBox>
</td></tr>
</fieldset>
</LoggedInTemplate>
</asp:LoginView>
</table>
</asp:Content>

code-behind:
-----------
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
Handles Me.Load
Dim lv As LoginView
Dim tb As TextBox
lv = FindControl("loginview1")
tb = lv.FindControl("textbox1")
tb.Text = "ok"
end sub

[Terry]

Thanks, it works indeed ...
Maybe you can also help me with the other problem in the thread above "how
to trigger .."?

"Teemu Keiski" <jo****@aspalliance.comschreef in bericht
news:F7**********************************@microsof t.com...

If you are running this on the content page, you don't need tom
FindControl the LoginView. You can just

Dim tb As TextBox
tb = Me.LoginView1.FindControl("textbox1")
tb.Text = "ok"

--
Teemu Keiski
AspInsider, ASP.NET MVP
http://blogs.aspadvice.com/joteke
http://teemukeiski.net

"Terry" <[e-mail] in message
news:eU**************@TK2MSFTNGP04.phx.gbl...

>Hi,

i want to access control "TextBox1" embedded in another control
"LoginView1" in order to change the 'Text' of the textbox.

Therefore i use 'FindControl' method but i get error:
"Object reference not set to an instance of an object" on line: tb =
lv.FindControl("textbox1")
Thanks for help
Cliff
aspx:
----
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1"
Runat="Server">
<table>
<asp:LoginView ID="LoginView1" runat="server">
<LoggedInTemplate>
<fieldset style="height: 425px; width: 335px;">
<tr><td>
<asp:TextBox ID="TextBox1" runat="server" Text=""></asp:TextBox>
</td></tr>
</fieldset>
</LoggedInTemplate>
</asp:LoginView>
</table>
</asp:Content>

code-behind:
-----------
Private Sub Page_Load(ByVal sender As Object, ByVal e As
System.EventArgs) Handles Me.Load
Dim lv As LoginView
Dim tb As TextBox
lv = FindControl("loginview1")
tb = lv.FindControl("textbox1")
tb.Text = "ok"
end sub