How to limit the number of characters allowed in a textbox?

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一整个雨季 2020-12-17 09:19

      
      
        
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                   心在旅途
                                             
                
                
                (楼主)
            
              
              
                2020-12-17 09:42
              

            
            
                        
Add an extender of type FliterTextBoxExtender for your text box

it should appear like that





    
             
                                                        
            
            
              
                
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