st_addstudentcourse.aspx.cs

来自「学生管理系统。C#开发。偏重与数据库的应用。」· CS 代码 · 共 73 行

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 ST_addstudentcourse : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // 在此处放置用户代码以初始化页面
        string st_connstr = ConfigurationManager.AppSettings["st_dbconn"];
        //连接本地计算机的sms数据库
        SqlConnection st_conn0 = new SqlConnection(st_connstr);
        if (!IsPostBack)
        {
            //课程名称下拉列表框绑定
            st_conn0.Open();
            string mysql1 = "select * from ST_course where ST_Course_kind='0'or ST_Course_kind='1'";
            SqlCommand st_comm1 = new SqlCommand(mysql1, st_conn0);
            SqlDataReader st_dr1 = st_comm1.ExecuteReader();
            while (st_dr1.Read())
            {
                st_ddl_course.Items.Add(new ListItem(st_dr1["ST_Course_name"].ToString(), st_dr1["ST_Course_id"].ToString()));
            }
            st_conn0.Close();
            //班级名称下拉列表框绑定
            st_conn0.Open();
            string st_sql2 = "select * from ST_class";
            SqlCommand st_comm2 = new SqlCommand(st_sql2, st_conn0);
            SqlDataReader st_dr2 = st_comm2.ExecuteReader();
            while (st_dr2.Read())
            {
                st_ddl_class.Items.Add(new ListItem(st_dr2["ST_Class_name"].ToString(), st_dr2["ST_Class_id"].ToString()));
            }
            st_conn0.Close();
        }
    }
    protected void st_btn_ok_Click(object sender, EventArgs e)
    {
        string st_connstr = ConfigurationManager.AppSettings["st_dbconn"];
        SqlConnection st_conn = new SqlConnection(st_connstr);
        st_conn.Open();
        string st_sqlstr = "insert into ST_student_course(ST_Student_id,ST_Course_id,ST_Course_year) (select ST_Student_id,@Course_id,@Course_year from ST_student where ST_Student_classid=@classid) ";
        SqlCommand st_comm = new SqlCommand(st_sqlstr, st_conn);
        st_comm.Parameters.Add(new SqlParameter("@classid", SqlDbType.VarChar, 50));
        st_comm.Parameters["@classid"].Value = st_ddl_class.SelectedItem.Value;
        st_comm.Parameters.Add(new SqlParameter("@Course_id", SqlDbType.VarChar, 50));
        st_comm.Parameters["@Course_id"].Value = st_ddl_course.SelectedItem.Value;
        st_comm.Parameters.Add(new SqlParameter("@Class_id", SqlDbType.VarChar, 50));
        st_comm.Parameters["@Class_id"].Value = st_ddl_class.SelectedItem.Value;
        st_comm.Parameters.Add(new SqlParameter("@Course_year", SqlDbType.VarChar, 50));
        st_comm.Parameters["@Course_year"].Value = st_tbx_year.Text;
        try
        {
            st_comm.ExecuteNonQuery();
            st_lbl_note.Text = "添加成功，请返回";

        }
        catch (SqlException)
        {
            st_lbl_note.Text = "添加失败";
            st_lbl_note.Style["color"] = "red";
        }
        st_conn.Close();
    }
}