default.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        SqlConnection myConn = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"].ToString());
        string strSql = "select * from tb_StudentInfo";
        string strSql1 = "select * from tb_ClassInfo";
        string strSql2 = "select s.*,c.名称 as 班级名称,c.班主任,c.班长 from tb_StudentInfo s LEFT JOIN tb_ClassInfo c ON  s.班级编号=c.班级编号 and s.班级编号='001'";
        SqlDataAdapter adapter = new SqlDataAdapter(strSql, myConn);
        DataSet ds = new DataSet();
        adapter.Fill(ds);
        this.GridView1.DataSource = ds.Tables[0].DefaultView;
        this.GridView1.DataBind();
        SqlDataAdapter adapter1 = new SqlDataAdapter(strSql1, myConn);
        DataSet ds1 = new DataSet();
        adapter1.Fill(ds1);
        this.GridView2.DataSource = ds1.Tables[0].DefaultView;
        this.GridView2.DataBind();
        SqlDataAdapter adapter2 = new SqlDataAdapter(strSql2, myConn);
        DataSet ds2 = new DataSet();
        adapter2.Fill(ds2);
        this.GridView3.DataSource = ds2.Tables[0].DefaultView;
        this.GridView3.DataBind();
    }
}