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Design screen as follows

Label (To show the message)

Faculty Name Dropdownlist

Month Dropdownlist

Year Dropdownlist

I have one button Show

When i click the Show button i want to validate if any of the above Faculty Name,Month and Year
is not selected.

i want to show the message in label.

For example if faculty name is not selected show the message Faculty Name is not selected.

for that how can i vaidate in asp.net using csharp.

regards,
narasiman P.
Posted
Comments
Thanks7872 30-Sep-13 8:27am    
Do you have access to google.com?

Simply check if the value in dropdown is not null.
C#
if(ComboBox.SelectedItem == null)
    //do something about it
 
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Try RequiredFieldValidator:

http://www.w3schools.com/aspnet/control_reqfieldvalidator.asp[^]

All the best.

Azee...
 
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Refer below article

Introduction to ASP.NET validation[^]
 
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