classes.aspx.cs

C# SQL遍写的学生选课系统 给大家看看 有点多 有点复杂

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>
	/// _class 的摘要说明。
	/// </summary>
	public partial class classes : System.Web.UI.Page
	{
		string strsql;
        private DataAccess DataAs;
		protected void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			
			if(!IsPostBack) 
				Bindgrid();
		}

		#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

		private void Btn_exit_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("student.aspx");
		}
        //public void DataGrid_Page(object sender,DataGridPageChangedEventArgs e)
        //{
        //    Dgd_class.CurrentPageIndex=e.NewPageIndex;
        //    Bindgrid();
        //}
        //public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
        //{		
        //    Dgd_class.EditItemIndex=(int)e.Item.ItemIndex;
        //    Bindgrid();	
        //}
        //public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
        //{			
        //    Dgd_class.EditItemIndex=-1;
        //    Bindgrid();	
        //}

        //public void DataGrid_update(object sender,DataGridCommandEventArgs e)
        //{
        //    string strsql="update class set Class_name='"+((TextBox)e.Item.Cells[1].Controls[0]).Text+"',Class_department='"+((TextBox)e.Item.Cells[2].Controls[0]).Text+"',Class_college='"+
        //            ((TextBox)e.Item.Cells[3].Controls[0]).Text + "',Class_teacherid='" + ((TextBox)e.Item.Cells[4].Controls[0]).Text + "' where Class_id='" + Dgd_class.DataKeys[(int)e.Item.ItemIndex]+"'";
        //    DataAs = new DataAccess();
        //    bool Result = DataAs.ExecSql(strsql);
        //    if (Result)
        //    {
		
        //        Lbl_note.Text="编辑成功";
        //        Dgd_class.EditItemIndex=-1;
        //    }
        //    else
        //    {
        //        Lbl_note.Text="编辑失败";
        //        Lbl_note.Style["color"]="red";
        //    }		
        //    Bindgrid();
			
        //}

		public void Bindgrid()
		{
			strsql="select * from class";
            DataAs = new DataAccess();
            DataTable DT = DataAs.CreateDatatable(strsql);
            GridView1.DataSource = DT;
            GridView1.DataBind();
		}

		protected void Btn_search_Click(object sender, System.EventArgs e)
		{
			strsql="select * from class  where Class_id='"+Tbx_id.Text+"'or Class_name='"+Tbx_name.Text+"'";
            DataAs = new DataAccess();
            DataTable DT = DataAs.CreateDatatable(strsql);
            GridView1.DataSource = DT;
            GridView1.DataBind();
		}


        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            string strsql = "delete from class where Class_id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
            DataAs = new DataAccess();
            bool Result = DataAs.ExecSql(strsql);
            if (Result)
            {

                Lbl_note.Text = "删除成功";

            }
            else
            {
                Lbl_note.Text = "删除失败";
                Lbl_note.Style["color"] = "red";
            }
            Bindgrid();
        }
        protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            GridView1.PageIndex = e.NewPageIndex ;
            Bindgrid();
        }
        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            Bindgrid();
        }
        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            Bindgrid();
        }
        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
             GridViewRow gvr = GridView1.Rows[GridView1.EditIndex];
             string strsql = "update class set Class_name='" + ((TextBox)gvr.Cells[1].Controls[0]).Text + "',Class_department='" + ((TextBox)gvr.Cells[2].Controls[0]).Text + "',Class_college='" +
                     ((TextBox)gvr.Cells[3].Controls[0]).Text + "',Class_teacherid='" + ((TextBox)gvr.Cells[4].Controls[0]).Text + "' where Class_id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
             DataAs = new DataAccess();
            bool Result = DataAs.ExecSql(strsql);
            if (Result)
            {

                Lbl_note.Text = "编辑成功";
                GridView1.EditIndex = -1;
            }
            else
            {
                Lbl_note.Text = "编辑失败";
                Lbl_note.Style["color"] = "red";
            }
            Bindgrid();
        }
}
}