adminStudentScore.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 adminStudentScore : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindDDL();      //初始化课程下拉列表框
            //GridViewBind();
        }
    }

    private void BindDDL()
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr = "SELECT distinct courceID,courceName from Cource";
        DataSet ds = new DataSet();

        SqlConnection conn = new SqlConnection(connStr);    //创建连接对象
        if (conn.State.ToString() == "Closed")              //如果连接关闭,打开
            conn.Open();
        SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
        da.Fill(ds);                                        //从数据库中取数据放到DataSet数据集中
        if (conn.State.ToString() == "Open")
            conn.Close();

        ddlCource.DataSource = ds.Tables[0].DefaultView;
        ddlCource.DataTextField = "courceName";             //下拉列表框每项显示课程名称
        ddlCource.DataValueField = "courceID";              //下拉列表框每项的值为课程编号
        ddlCource.DataBind();
    }

    private void GridViewBind()
    {
        string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        string SqlStr = "SELECT student.*,Elect.* FROM Student ,Elect where Student.stuID=Elect.stuID and Elect.courceID='"+ddlCource.SelectedValue+"' and teaID='"+ddlTeacher.SelectedValue+"' order by Student.stuGrade";
        DataSet ds = new DataSet();
        SqlConnection conn = new SqlConnection(connStr);
        try
        {
            if (conn.State.ToString() == "Closed")
                conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds);

            GridView1.DataSource = ds.Tables[0].DefaultView;
            GridView1.DataBind();
        }
        catch (Exception ex)