您需要通过真正作为最后一个参数的的RegisterClientScriptBlock（）为了让您的客户端code被包裹在一个 ＆LT;脚本＆GT; 元素：

You need to pass true as the last argument to RegisterClientScriptBlock() in order for your client-side code to be wrapped in a <script> element:

protected void Page_Load(object sender, EventArgs e)
{
    ClientScript.RegisterClientScriptBlock(GetType(), "Email",
        "GetEmail();", true);
}