<asp:TextBox ID="TextBox1" onpaste="return false;" runat="server"></asp:TextBox>
onpaste="return false" 禁用粘贴;
oncopy="return false" 禁用复制;
ondragenter="return false;" //禁止拖入;
oncut="return false" 禁用剪切;
context="noContext" 禁用右键菜单
Style="ime-mode: disabled" onkeydown="if(event.keyCode==13)event.keyCode=9" 禁用输入法