从零开始学ASP.NET（基础篇）

从零开始学ASP.NET（基础篇）(19)             {
                Response.Write("<script language=javascript>alert('帐号不能为空')</script>");
                return;
            }
            if (txtPassword.Text == String.Empty txtPassword.Text.Trim() == "")
            {
                Response.Write("<script language=javascript>alert('没有输入密码')</script>");
                return;