引用的命名空间 using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Data.SqlClient ; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; 看看缺了哪个
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient ;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
看看缺了哪个