<rn5a@rediffmail.com> wrote in message
news:1172381332.674240.60620@k78g2000cwa.googlegroups.com...
> Assume that a Web Form has a TextBox server control whose ID is
> *txtName*. Now why can't I do something like this?
>
> <script language="VB" runat="server">
> Dim txtName As String = txtName.Text
>
> 'other subs & functions come here
> </script>
>
> The above code generates the following error pointing to the very
> first line within the <script></script> tags:
>
> Object reference not set to an instant of an object.
>
> What causes this error? Is it because at that point, the TextBox
> hasn't been created yet on the Form?
>

rn5a@rediffmail.com wrote:
> Assume that a Web Form has a TextBox server control whose ID is
> *txtName*. Now why can't I do something like this?
>
> <script language="VB" runat="server">
> Dim txtName As String = txtName.Text
>
> 'other subs & functions come here
> </script>
>
> The above code generates the following error pointing to the very
> first line within the <script></script> tags:
>
> Object reference not set to an instant of an object.
>
> What causes this error? Is it because at that point, the TextBox
> hasn't been created yet on the Form?
>

"Göran Andersson" <guffa@guffa.com> wrote in message
news:epu1g9NWHHA.896@TK2MSFTNGP05.phx.gbl...
> rn5a@rediffmail.com wrote:
>> Assume that a Web Form has a TextBox server control whose ID is
>> *txtName*. Now why can't I do something like this?
>>
>> <script language="VB" runat="server">
>> Dim txtName As String = txtName.Text
>>
>> 'other subs & functions come here
>> </script>
>>
>> The above code generates the following error pointing to the very
>> first line within the <script></script> tags:
>>
>> Object reference not set to an instant of an object.
>>
>> What causes this error? Is it because at that point, the TextBox
>> hasn't been created yet on the Form?
>>
>
> You have declared a local variable with the same name as the control, so
> the control is not visible at all in that scope. You are trying to get the
> value for the string from the (non-existent) Text property of the same
> string, which gives you a null reference error as the reference has yet
> not been set.
>
> --
> Göran Andersson
> _____
> http://www.guffa.com

> hmm... If you are right, I would expect a compiler error for non-existent
> property Text...

Eliyahu Goldin wrote:
> hmm... If you are right, I would expect a compiler error for non-existent
> property Text...
>