Server Error

[Guest]

I have problem with my studio net 2003. My web Form content a textboox and button. I want each time click button an
textbox is empty, the message will appear suc

Button Click...procedur
IF Textbox.text="" The
msgBox("textbox must be filled...",......
...
ENDI
End Button...procedu

Everytime I run the form and click the button with the empty textbox, the server error message appears such as

"It is invalid to show a modal dialog or form when the application is not running in user interactive mode..

"Specify the service notification or default desktop only style to display notification from s service application

Is there anybody Would like to help me please? I Thank 4 your kind..

 

[Guest]

It is probably not possible to display an error message in the server side code. Instead the same can be achieved using javascript as
'Server side code
Private sub Page_load(.....
Button1.attributes.add("onClick","return fnCheckEmpty()")
end sub
'javascript code
function fnCheckEmpty()
{
if (document.forms[0].TextBox1.value == ""){
alert("Textbox should not be empty");
return false;}
else
return true;
}
hope this helps!
srini

 

[avnrao]

is it web app? you should use RegisterStartupscript to show the message.

RegisterStartupScript("UniqueIDMessage","<script
language='javascript'>alert('message');</script>");

Av.

 

[Guest]

sRIni, thank 4 your answer, but I don't understand what do you mean. I think it should be possible, cause ASP.NET make it possible..but thank..