RequiredFieldValidator Question

29 Mar 2005 3:43 PM

Randel Bjorkquist

Hi all,

I'm extremly new to building web-applications, C#, and the whole Microsoft
Visual Studio 2003 .NET IDE, so please bare with me.

What I have:
I have a web-application that communicates to an SQL Server. My aspx file
is on a Windows 2000 Server running IIS. The base of the program is working
just ducky.

My problem:
I'm trying to set the "ControlToValidate" property of a
"RequiredFieldValidator" at run time and get an exception when my code
executes. The error is "Unable to find control id
'System.Web.UI.WebControls.ListBox' referenced by the 'ControlToValidate'
property of 'rfv_Parts'."

CODE:

:

private void cmd_Submit_Click(object sender, System.EventArgs e){
rfv_Parts.ControlToValidate = lstbox_Parts.ToString();

:

}//END OF "cmd_Submit_Click" METHOD

:

Can someone tell me why this isn't working?

Thanks,

Randel Bjorkquist

29 Mar 2005 4:41 PM

Matthias S.

I'd try:

rfv_Parts.ControlToValidate = lstbox_Parts.ID;

hth

/Matthias

Randel Bjorkquist wrote:
Show quoteHide quote

> Hi all,
>
> I'm extremly new to building web-applications, C#, and the whole Microsoft
> Visual Studio 2003 .NET IDE, so please bare with me.
>
> What I have:
> I have a web-application that communicates to an SQL Server. My aspx file
> is on a Windows 2000 Server running IIS. The base of the program is working
> just ducky.
>
> My problem:
> I'm trying to set the "ControlToValidate" property of a
> "RequiredFieldValidator" at run time and get an exception when my code
> executes. The error is "Unable to find control id
> 'System.Web.UI.WebControls.ListBox' referenced by the 'ControlToValidate'
> property of 'rfv_Parts'."
>
> CODE:
>     :
>     private void cmd_Submit_Click(object sender, System.EventArgs e){
>       rfv_Parts.ControlToValidate = lstbox_Parts.ToString();
>     :
>     }//END OF "cmd_Submit_Click" METHOD
>     :
>
> Can someone tell me why this isn't working?
>
> Thanks,
>
> Randel Bjorkquist
>
>

29 Mar 2005 5:41 PM

Randel Bjorkquist

Hi Matthias,

I think I'm going about my thought wrong. Long story short, I'm trying to
validate if there are more then one item in a ListBox. I tried using a
RequiredFieldValidator, but that doesn't work. So I thought I could assign
it the control I wanted to in the OnClick event of a Button and work it that
way and that was why I'm was trying to programmably set the
"ControlToValidate" property.

Like I said, I'm really after being able to figure out how to determine if
there are at least one entery into a ListBox when I submit my Web Form.

Does that make sense? I'm still stuck. I've tried a CustomeValidator and a
RangeValidator, but I've had no luck with either. If you have any more
sugguestions, please don't hessitate to do so, okay?

Thank you,

Randel Bjorkquist

Show quoteHide quote

"Matthias S." <postamt@_remove_emvoid_remove_.de> wrote in message
news:OPzXB4HNFHA.904@tk2msftngp13.phx.gbl...
> I'd try:
>
> rfv_Parts.ControlToValidate = lstbox_Parts.ID;
>
> hth
>
> /Matthias
>
> Randel Bjorkquist wrote:
>> Hi all,
>>
>> I'm extremly new to building web-applications, C#, and the whole
>> Microsoft Visual Studio 2003 .NET IDE, so please bare with me.
>>
>> What I have:
>> I have a web-application that communicates to an SQL Server. My aspx
>> file is on a Windows 2000 Server running IIS. The base of the program is
>> working just ducky.
>>
>> My problem:
>> I'm trying to set the "ControlToValidate" property of a
>> "RequiredFieldValidator" at run time and get an exception when my code
>> executes. The error is "Unable to find control id
>> 'System.Web.UI.WebControls.ListBox' referenced by the 'ControlToValidate'
>> property of 'rfv_Parts'."
>>
>> CODE:
>>     :
>>     private void cmd_Submit_Click(object sender, System.EventArgs e){
>>       rfv_Parts.ControlToValidate = lstbox_Parts.ToString();
>>     :
>>     }//END OF "cmd_Submit_Click" METHOD
>>     :
>>
>> Can someone tell me why this isn't working?
>>
>> Thanks,
>>
>> Randel Bjorkquist