st_addstudentcourse.aspx.cs

学生管理系统（asp.net+sql server）

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace STGROUP
{
	/// <summary>
	/// ST_addstudentcourse 的摘要说明。
	/// </summary>
	public class ST_addstudentcourse : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DropDownList st_ddl_course;
		protected System.Web.UI.WebControls.DropDownList st_ddl_class;
		protected System.Web.UI.WebControls.TextBox st_tbx_year;
		protected System.Web.UI.WebControls.Button st_btn_ok;
		protected System.Web.UI.WebControls.Label st_lbl_note;
	    
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			string st_connstr= ConfigurationSettings.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 ();
			}
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.st_btn_ok.Click += new System.EventHandler(this.st_btn_ok_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void st_btn_ok_Click(object sender, System.EventArgs e)
		{
			string st_connstr= ConfigurationSettings.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();

		}

	}
}