problem with FindControl

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

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" <no@mail.prwrote in message
news:eUnDZyNUHHA.4668@TK2MSFTNGP04.phx.gbl...

Quote:

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
>
>
>

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

"Teemu Keiski" <joteke@aspalliance.comschreef in bericht
news:F71CEBC9-B5A2-4BFA-819C-A88BB87BE5EA@microsoft.com...

Quote:

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" <no@mail.prwrote in message
news:eUnDZyNUHHA.4668@TK2MSFTNGP04.phx.gbl...

Quote:

>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
>>
>>
>>

>

problem with FindControl

re: problem with FindControl

re: problem with FindControl

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