cour_choose.aspx.cs

asp.net 学生信息管理系统！可以作为课程设计来使用

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;
using UseDataBase;

public partial class teacher_Cour_choose : System.Web.UI.Page
{
    string connectionString = ConfigurationManager.ConnectionStrings["DataBaseConnectionString"].ConnectionString;
    protected void Page_Load(object sender, EventArgs e)
    {
        /*
          if (Session["UserID"] == null)
           {
               Response.Write("<script language=javascript>alert('请先登录');location='Default.aspx'</script>");
           }
        
          if (Session["power"] != "1")
          {
              Response.Write("<script language=javascript>alert('你的权限不够');location='Default.aspx'</script>");
          }
         */
    }
    protected void btnGo_Click(object sender, EventArgs e)
    {
        cbl.DataSource = null;
        cbl.DataSourceID = "srcGetSelectStudent";
        if (rab.SelectedValue == "0")
        {
            srcGetSelectStudent.SelectCommand = "select tabstu_cour.scid,tabstu.sname from tabstu,tabstu_cour, tabCrous where tabCrous.Crname=@Crname and tabCrous.Crid=tabstu_cour.Crid and tabstu_cour.Sid=tabstu.Sid";
            srcGetSelectStudent.SelectParameters.Clear();
            srcGetSelectStudent.SelectParameters.Add(new ControlParameter("Crname", "txtSQL", "Text"));
        }
        else
        {
            Response.Write("<script>alert('对不起，这项查询功能还没有开放!')</script>");
        }
        srcGetSelectStudent.Select(DataSourceSelectArguments.Empty);
        cbl.DataBind();
        if (cbl.Items.Count == 0)
        {
            btnDelete.Visible = false;
            Response.Write("<script>alert('对不起，没有符合要求的数据!')</script>");
        }
        else
            btnDelete.Visible = true;
    }
    protected void btnDelete_Click(object sender, EventArgs e)
    {
        srcGetSelectStudent.DeleteCommand = "delete from tabstu_cour where Scid=@Scid";
        for (int i = 0; i < cbl.Items.Count; i++)
        {
            if (cbl.Items[i].Selected)
            {
                srcGetSelectStudent.DeleteParameters.Clear();
                Session.Add("Scid", cbl.Items[i].Value);
                srcGetSelectStudent.DeleteParameters.Add(new SessionParameter("Scid", "Scid"));
                srcGetSelectStudent.Delete();
            }
            else
                continue;
        }
        cbl.DataSourceID = null;
        DataBaseIO db = new DataBaseIO(connectionString);
       
        string selectString = "select tabstu_cour.scid,tabstu.sname from tabstu,tabstu_cour, tabCrous where tabCrous.Crname=@Crname and tabCrous.Crid=tabstu_cour.Crid and tabstu_cour.Sid=tabstu.Sid";
        SqlParameter parselectedName = new SqlParameter("@Crname", SqlDbType.VarChar);
        parselectedName.Value = txtSQL.Text;
        DataSet ds = new DataSet();
        ds = db.GetDataSet(selectString, parselectedName);
        cbl.DataSource = ds.Tables[0];
        cbl.DataBind();
    }
}