admincourse.aspx.cs

学生网上选课系统,实现了学生的在线选课和教师课程的上传

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 _Default : System.Web.UI.Page
{
    SqlConnection conn;
    protected void Page_Load(object sender, EventArgs e)
    {
       string connstr=System.Configuration .ConfigurationManager .AppSettings ["ConnectionString"];
       conn = new SqlConnection(connstr );
       if (Session["userName"] == null)
       {
           Response.Redirect("Login.aspx");
       }
      
       if (!this.IsPostBack)
       {
           ddlBind();
           ddlBind1();
           ddlBind2();
           CourceDetailsShow();
       }
    }
    private void ddlBind()
    {
        //string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr = "SELECT teaID,teaName from Teacher";
        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();

        ddlTeacherName.DataSource = ds.Tables[0].DefaultView;
        ddlTeacherName.DataTextField = "teaName";             //下拉列表每项框显示教师姓名
        ddlTeacherName.DataValueField = "teaID";              //下拉列表框每项的值为教师编号
        ddlTeacherName.DataBind();
        
    }
    private void ddlBind1()
    {
        //string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr1 = "SELECT typeID,typename from type";
        DataSet ds1 = 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 da1= new SqlDataAdapter(SqlStr1, conn);
        da1.Fill(ds1);                                        //从数据库中取数据放到DataSet数据集中
        if (conn.State.ToString() == "Open")
            conn.Close();


        ddltypename.DataSource = ds1.Tables[0].DefaultView;
        ddltypename.DataTextField = "typename";             //下拉列表框每项显示课程类别名称
        ddltypename.DataValueField = "typeID";              //下拉列表框每项的值为课程类别编号
        ddltypename.DataBind();
    }
    private void ddlBind2()
    {
        //string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr2 = "SELECT departID,departname from depart";
        DataSet ds2 = 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 da2 = new SqlDataAdapter(SqlStr2, conn);
        da2.Fill(ds2);                                        //从数据库中取数据放到DataSet数据集中
        if (conn.State.ToString() == "Open")
            conn.Close();


        ddldepart.DataSource = ds2.Tables[0].DefaultView;
        ddldepart.DataTextField = "departname";             //下拉列表框每项显示课程类别名称
        ddldepart.DataValueField = "departID";              //下拉列表框每项的值为课程类别编号
        ddldepart.DataBind();
    }
    private void CourceDetailsShow()
    {
        //string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr = "SELECT Cource.*,Teacher.teaName,type.*,depart.* from Cource,Teacher,type,depart where Cource.teaID=Teacher.teaID and Cource.typeID=type.typeID and Cource.departid=depart.departid and Cource.courceID='" + Request["courceID"].ToString() + "' and Cource.teaID='" + Request["teaID"].ToString() + "'";
        //SqlConnection conn = new SqlConnection(connStr);    //创建连接对象
      
        try
        {
            if (conn.State.ToString() == "Closed")          //连接如果关闭，打开
                conn.Open();
             SqlCommand cmd = new SqlCommand(SqlStr, conn);
            SqlDataReader sdr = cmd.ExecuteReader();
            if (sdr.Read())
            {
                courceName.Text = sdr["courceName"].ToString();
                txtName.Text = sdr["courceName"].ToString();
                ddlTeacherName.SelectedItem.Text = sdr["teaName"].ToString();
                ddltypename.SelectedItem.Text = sdr["typename"].ToString();
                ddldepart.SelectedItem.Text = sdr["departname"].ToString();
                txtTime.Text = sdr["courceTime"].ToString();
                txtAddress.Text = sdr["courceAddress"].ToString();
                courcerenshu.Text = sdr["courcerenshu"].ToString();
                xueshi.Text = sdr["xueshi"].ToString();
                credit.Text = sdr["credit"].ToString();
                txtDetails.Text = sdr["courceInfo"].ToString();
            }
            else
            {
                Response.Write("数据库错误，没查询到该门课程！");
                Response.End();
            }
        }
        catch (Exception ex)                                //异常处理
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
        finally
        {
            if (conn.State.ToString() == "Open")            //如果连接打开，关闭
                conn.Close();
        }
    }
    protected void imgBtnConfirm_Click(object sender, ImageClickEventArgs e)
    {
       // string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;   //取出连接字符串
        string SqlStr = "update Cource set courceName='" + txtName.Text + "',teaID='" + ddlTeacherName.SelectedValue + "',typeID='" + ddltypename.SelectedValue + "',departid='"+ddldepart.SelectedValue +"',courceTime='" + txtTime.Text + "',courceAddress='" + txtAddress.Text + "',courcerenshu='" + courcerenshu.Text + "',xueshi='" + xueshi.Text + "',credit='" + credit.Text + "',courceInfo='" + txtDetails.Text + "' where courceID='" + Request["courceID"].ToString() + "' and teaID='" + Request["teaID"].ToString() + "'";
       // SqlConnection conn = new SqlConnection(connStr);    //创建连接对象
        try
        {
            if (conn.State.ToString() == "Closed")          //连接如果关闭，打开
                conn.Open();
            SqlCommand cmd = new SqlCommand(SqlStr, conn);
            int flag = cmd.ExecuteNonQuery();
            if (flag>0)
            {
                lblMessage.Text = "成功修改课程信息！";
            }
            else
            {
                Response.Write("数据库错误，没查询到该门课程！");
                Response.End();
            }
        }
        catch (Exception ex)                                //异常处理
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
        finally
        {
            if (conn.State.ToString() == "Open")            //如果连接打开，关闭
                conn.Close();
        }
    
    }
    protected void imgBtnReturn_Click(object sender, ImageClickEventArgs e)
    {
        Response.Redirect("adminCourseDetails.aspx");
    }
   
}