How to add a RequiredFieldValidator to DropDownList control?

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青春惊慌失措 2020-11-29 01:51

I have a DropDownList binded with aSqlDataSource to display the values from the database.

I am unable to validate using a RequiredFie


      
      
        
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                   长情又很酷
                                             
                
                
                (楼主)
            
              
              
                2020-11-29 02:13
              

            
            
                        
Suppose your drop down list is:



....



There are two ways:




the 2nd way is to use a compare validator:



    
             
                                                        
            
            
              
                
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