userlist.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>
	/// userlist 的摘要说明。
	/// </summary>
	public partial class userlist : System.Web.UI.Page
	{
        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)
			{
                if (Request.QueryString["Teacher_id"] == "-1")
                {
                    Lbl_show.Text = "";
                }
                else
                {
                    string strsql = "insert into users(User_id,User_password,User_power) values('"+Request.QueryString["Teacher_id"]+"','"+Request.QueryString["Teacher_id"]+"',1)";
                    DataAs = new DataAccess();
                    bool Result = DataAs.ExecSql(strsql);
                    if (!Result)
                    {
                        Lbl_show.Text = "添加失败,请返回";
                        Lbl_show.Style["color"] = "red";
                    }
                }
				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

		public  void Bindgrid()
		{   
            string strsql="select users.*,teacher.Teacher_name from users,teacher where users.User_id=teacher.Teacher_id";
            DataAs = new DataAccess();
            DataTable DT = DataAs.CreateDatatable(strsql);
			GridView1.DataSource=DT;
            GridView1.DataBind();
		}
        protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            GridView1.PageIndex = e.NewPageIndex;
            Bindgrid();
        }
        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {
            GridView1.EditIndex = -1;
            Bindgrid();
        }
        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            string strsql = "delete from users where User_id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
            DataAs = new DataAccess();
            bool Result = DataAs.ExecSql(strsql);
            if (Result)
            {
                Lbl_show.Text = "删除成功";

            }
            else
            {
                Lbl_show.Text = "删除失败";
                Lbl_show.Style["color"] = "red";
            }
            Bindgrid();
        }
        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            Bindgrid();
        }
        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            GridViewRow gvr = GridView1.Rows[e.RowIndex];
            string strsql = "update users set User_power=" + ((TextBox)gvr.Cells[5].Controls[0]).Text + "where User_id='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";
            DataAs = new DataAccess();
            bool Result = DataAs.ExecSql(strsql);
            if (Result)
            {
                Lbl_show.Text = "编辑成功";
                GridView1.EditIndex = -1;
            }
            else
            {
                Lbl_show.Text = "编辑失败，请检查输入！";
                Lbl_show.Style["color"] = "red";
            }
            Bindgrid();
        }
}
}