http://www.cnblogs.com/fan2k/archive/2008/03/10/1098240.html
解决方法一:
.Framework2.0中才有的button属
性:<asp:button id="Button2" onclick="btnSubmit_Click" runat="server" OnClientClick="this.disabled=true;
this.form.submit();" UseSubmitBehavior="False" />
解决重复提交:OnClientClick="this.disabled=true;this.form.submit();" UseSubmitBehavior="False"
解决方法二:
this.Button3.Attributes["onclick"] = this.GetPostBackEventReference
(this.Button3) + ";
this.disabled=true;"; //防止重复提交
客户端代码的不同:
其中button1为简单的default button