.NET中弹出对话框的使用

    /// <summary>
    /// 弹出对话框
    /// </summary>
    /// <param name="str">提示内容</param>
    protected void MessageBox(string str)
    {
        Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('"+str+"');</script>"); 
    }