winform中TextBox只能输入字母

 1  private void txtTestPerson_KeyPress(object sender, KeyPressEventArgs e)
 2         {
 3          
 4             if ((e.KeyChar >= 'a' && e.KeyChar <= 'z') || (e.KeyChar >= 'A' && e.KeyChar <= 'Z') || e.KeyChar == '')
 5             {
 6                 e.Handled = false;
 7             }
 8             else
 9             {
10                 e.Handled = true;
11             }
12         }






        

	      

	    

	  

	  

	    
      
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          原文地址：https://www.cnblogs.com/HYJ0201/p/8376658.html