Hi All,
I try to create a sample asp.net ajax application in visual studio 2005.
I have 1 textbox, 1 requirefieldvalidator and 1 button. All are in updatepanel.
When I click the button and the value of textbox is empty, I should get an error message of requirefieldvalidator. It works fine in my pc running window xp, but I got a problem in window 2003. It shows the error message only at the first time when the value in textbox is empty, but when I try to enter some text and click submit and finally try to leave the value blank again and click submit then I do not get error message. Anyway, I notice that page is not post back to the server. It means that validation is fire but the error message is not provided.
Any idea?