modifycourse.aspx.cs

一个比较小型的学生管理系统

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>
	/// modifycourse 的摘要说明。
	/// </summary>
	public partial class modifycourse : System.Web.UI.Page
	{
        private DataAccess DataAs;	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			//教师名称下拉列表框绑定
			if(!IsPostBack)
			{	
				
				string mysql="select * from teacher";
                DataAs = new DataAccess();
                DataTable DT = DataAs.CreateDatatable(mysql);
                for (int i = 0; i < DT.Rows.Count;i++ )
                {
                    Ddl_teacher.Items.Add(new ListItem(DT.Rows[i][1].ToString(), DT.Rows[i][0].ToString()));
                }				
				//班级名称下拉列表框绑定
				string mysql2="select * from class";
                DataTable DT2 = DataAs.CreateDatatable(mysql2);
                for (int i = 0; i < DT2.Rows.Count; i++)
				{
                    Ddl_class.Items.Add(new ListItem(DT2.Rows[i][1].ToString(), DT2.Rows[i][0].ToString()));
				}
                string mysql1 = "select * from teacher_course where Course_id='" + Request.QueryString["Course_id"].ToString()+"'";
                DataTable DT3 = DataAs.CreateDatatable(mysql1);
				if(DT3.Rows.Count != 0)
				{
					Tbx_course.Text=DT3.Rows[0][2].ToString();
					Ddl_teacher.Items.FindByValue(DT3.Rows[0][1].ToString()).Selected=true;
					Ddl_class.Items.FindByValue(DT3.Rows[0][3].ToString()).Selected=true;
					Ddl_class.Items.FindByValue(DT3.Rows[0][3].ToString()).Attributes.CssStyle["color"]="red";
					Tbx_year.Text=DT3.Rows[0][4].ToString();
				}
				else
			    {  
                    Response.Write("此课程未分配教师！请返回");
				    Response.End();				
			    }           
			}

		}

		#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()
		{    

		}
		#endregion

		protected void Btn_ok_Click(object sender, System.EventArgs e)
		{
		
			string strsql="update teacher_course set Teacher_id='"+Ddl_teacher.SelectedItem.Value+"',Class_id='"+Ddl_class.SelectedItem.Value+"',Course_year='"+Tbx_year.Text+"' where Course_id='"+Request.QueryString["Course_id"].ToString()+"'";
		    DataAs = new DataAccess();
            bool Result = DataAs.ExecSql(strsql);
			if (Result)
			{
			   Lbl_note.Text="修改成功，请返回！";
			}
			else
			{
				Lbl_note.Text="修改有误，请检查输入！";
			}
		}

		protected void Btn_delete_Click(object sender, System.EventArgs e)
		{

            string strsql = "delete from teacher_course where Teacher_id='" + Ddl_teacher.SelectedItem.Value + "'and Class_id='" + Ddl_class.SelectedItem.Value + "'and Course_year='" + Tbx_year.Text + "' and Course_id='" + Tbx_course.Text + "'";
            DataAs = new DataAccess();
			bool Result = DataAs.ExecSql(strsql);
            if (Result)
			{	
			
				Lbl_note.Text="删除成功，请返回！";
				Btn_ok.Enabled=false;
				Btn_delete.Enabled=false;
			}
			else
			{
				Lbl_note.Text="删除有误,请查明对应关系，再做删除！";
		    }
				
		}		
	}
}