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?a.直接向控件添加客户端属性
<asp:Button ID=”MyButton” Text=”ClickMe” onmouseover=”this.style.cursor=’pointer'” runat=”server” />

b.调用内置方法
可以通过调用WebControl.Attributes.Add()方法为控件添加客户端属性，如下所示：

MyButton.Attributes.Add(“onmouseover”, “this.style.cursor=’pointer'”);

c. OnClientClick
MyButton.OnClientClick = “alert(‘Hello!’)”;