<asp:Button ID="Button1" runat="server" Text="打印"  class="buttonNoPrint" OnClientClick="javascript:window.print();return false;" />

 

 <style type="text/css">  
      @media print   {  
              .buttonNoPrint  
              {  
              display:   none;  
             
              }  
      }  
  </style>  

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