从零开始学ASP.NET（基础篇）

从零开始学ASP.NET（基础篇）(2) 放一个Button控件：ID为btnShowVariable
放一个Label控件：ID为labServerVariable

添加Button的单击事件，如下代码
        private void btnShowVariable_Click(object sender, System.EventArgs e)
        {            
            labServerVariables.Text = "";

            StringBuilder info = new StringBuilder();

            foreach (object objVar in Request.ServerVariables)
            {
                info.Append("<span style='font-size:9pt'>");
                info.Append(objVar.ToString());