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【单选题】
你在创建一个 Web 窗体。这个 Web 窗体允许用户计算值并在名为 lblResults 的 Label 控件中显示结果。你需要在 Web 窗体通过 Error 事件截获所有未处理的异常并显示异常在 Web 窗体上。你可以使用下面那个代码段实现？（）A.
protected void Page_Error(object sender, EventArgs e) { lblResults.Text = e.ToString();e=null;}
B.
protected void Page_Error(object sender, EventArgs e) { lblResults.Text =Server.GetLastError().ToStri();Server.ClearError();}
C.
protected void Page_Error(object sender, EventArgs e) Response.Write(e.ToString());e=null;}
D.
protected void Page_Error(object sender, EventArgs e) Response.Write(Server.GetLastError().ToString()); Server.ClearError();}
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