对话框

　　private void ShowMessageBox(string strMessaage)
    //输出信息
    {
        Page.ClientScript.RegisterStartupScript(this.GetType(), " ", string.Format("<script> alert(\"{0}\")</script> ", strMessaage.Replace("\"", "\\\" ")));
    }

    private void ShowMessageBoxURL(string err, string url)
    //输出信息并跳转
    {
        System.Text.StringBuilder builder = new System.Text.StringBuilder();

        builder.Append(" <script language=\"javascript\">");
        builder.Append("alert(\"" + err + "\");");
        if (!String.IsNullOrEmpty(url))
            builder.Append("location=‘" + url + "‘;");
        else
            builder.Append("history.go(-1);");
        builder.Append(" </script>");

        HttpContext.Current.Response.Write(builder.ToString());
        HttpContext.Current.Response.End();
    }