assigncourse.aspx.cs

一个学生管理系统的C++源程序

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 sms
{
	/// <summary>
	/// assigncourse 的摘要说明。
	/// </summary>
	public class assigncourse : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DropDownList Ddl_teacher;
		protected System.Web.UI.WebControls.DropDownList Ddl_course;
		protected System.Web.UI.WebControls.DropDownList Ddl_class;
		protected System.Web.UI.WebControls.Button Btn_ok;
		protected System.Web.UI.WebControls.TextBox Tbx_year;
		protected System.Web.UI.WebControls.RequiredFieldValidator Rv_year;
		protected System.Web.UI.WebControls.RequiredFieldValidator Rv_teacher;
		protected System.Web.UI.WebControls.RequiredFieldValidator Rv_course;
		protected System.Web.UI.WebControls.Label Lbl_note;
	
		private void Page_Load(object sender, System.EventArgs e)
		{//教师名称下拉列表框绑定
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			//连接本地计算机的sms数据库
			SqlConnection cn0= new SqlConnection (strconn);
			if(!IsPostBack)
			{
				cn0.Open ();
				string mysql="select * from teacher";
				SqlCommand cm0=new SqlCommand  (mysql,cn0);
				SqlDataReader dr0=cm0.ExecuteReader ();
				while(dr0.Read ())
				{
					Ddl_teacher.Items .Add (new ListItem(dr0["Teacher_name"].ToString(),dr0["Teacher_id"].ToString()) );
				}
				cn0.Close ();
				//课程名称下拉列表框绑定
				cn0.Open ();
				string mysql1="select * from course";
				SqlCommand cm1=new SqlCommand  (mysql1,cn0);
				SqlDataReader dr1=cm1.ExecuteReader ();
				while(dr1.Read ())
				{
					Ddl_course.Items .Add (new ListItem(dr1["Course_name"].ToString() ,dr1["Course_id"].ToString()) );
				}
				cn0.Close ();
				//班级名称下拉列表框绑定
				cn0.Open ();
				string mysql2="select * from class";
				SqlCommand cm2=new SqlCommand  (mysql2,cn0);
				SqlDataReader dr2=cm2.ExecuteReader ();
				Ddl_class.Items .Add (new ListItem("","") );
				while(dr2.Read ())
				{
					Ddl_class.Items .Add (new ListItem(dr2["Class_name"].ToString() ,dr2["Class_id"].ToString()) );
				}
				cn0.Close ();
			}
			// 在此处放置用户代码以初始化页面

		}

		#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.Btn_ok.Click += new System.EventHandler(this.Btn_ok_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Btn_ok_Click(object sender, System.EventArgs e)
		{
			string strconn= ConfigurationSettings.AppSettings["dsn"];
			SqlConnection cn= new SqlConnection (strconn);
			cn.Open();
			string strsql="insert into teacher_course(Teacher_id,Course_id,Class_id,Course_year) values(@Teacher_id,@Course_id,@Class_id,@Course_year)";
            SqlCommand cm=new SqlCommand(strsql,cn);
			cm.Parameters.Add(new SqlParameter("@Teacher_id",SqlDbType.VarChar,50));
			cm.Parameters["@Teacher_id"].Value=Ddl_teacher.SelectedItem.Value;
			cm.Parameters.Add(new SqlParameter("@Course_id",SqlDbType.VarChar,50));
			cm.Parameters["@Course_id"].Value=Ddl_course.SelectedItem.Value;
			cm.Parameters.Add(new SqlParameter("@Class_id",SqlDbType.VarChar,50));
			cm.Parameters["@Class_id"].Value=Ddl_class.SelectedItem.Value;
			cm.Parameters.Add(new SqlParameter("@Course_year",SqlDbType.VarChar,50));
			cm.Parameters["@Course_year"].Value=Tbx_year.Text;			
			try
			{
				cm.ExecuteNonQuery();
				Lbl_note.Text="添加成功，请返回";
				
			}
			catch(SqlException)
			{
				Lbl_note.Text="添加失败";
				Lbl_note.Style["color"]="red";
			}	
			cn.Close();
		}
	}
}