userlist.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>
	/// userlist 的摘要说明。
	/// </summary>
	public class userlist : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid Dgd_userinformation;
		protected System.Web.UI.WebControls.Label Lbl_show;
	    SqlConnection cn;
		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 strconn= ConfigurationSettings.AppSettings["dsn"];
			cn=new SqlConnection(strconn);
			if(!IsPostBack)
			{
				if(Request.QueryString["Teacher_id"]=="-1") Lbl_show.Text="";
				else
				{
						cn.Open();
					string strsql="insert into users(User_id,User_password,User_power) values(@userid,@userpwd,1)";
					SqlCommand cm=new SqlCommand(strsql,cn);
					cm.Parameters.Add(new SqlParameter("@userid",SqlDbType.VarChar,50));
					cm.Parameters["@userid"].Value=Request.QueryString["Teacher_id"];
					cm.Parameters.Add(new SqlParameter("@userpwd",SqlDbType.VarChar,50));
					cm.Parameters["@userpwd"].Value=Request.QueryString["Teacher_id"];
					try
					{
						cm.ExecuteNonQuery();		
				
					}
					catch(SqlException)
					{
						Lbl_show.Text="添加失败,请返回";
						Lbl_show.Style["color"]="red";
					}
					cn.Close();
				}
				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()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
		public void DataGrid_Page(object sender,DataGridPageChangedEventArgs e)
		{
			Dgd_userinformation.CurrentPageIndex=e.NewPageIndex;
			Bindgrid();
		}
		public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
		{
			Dgd_userinformation.EditItemIndex=-1;
			Bindgrid();
		}
		public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
		{
			Dgd_userinformation.EditItemIndex=(int)e.Item.ItemIndex;
			Bindgrid();
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			string strsql="update users set User_power=@kind where User_id=@uid";
			SqlCommand cm=new SqlCommand(strsql,cn);
			cm.Parameters.Add(new SqlParameter("@uid",SqlDbType.VarChar,50));		
			cm.Parameters.Add(new SqlParameter("@kind",SqlDbType.Int,4));
			string colvalue=((TextBox)e.Item.Cells[5].Controls[0]).Text;
			cm.Parameters["@kind"].Value=colvalue;
			cm.Parameters["@uid"].Value=Dgd_userinformation.DataKeys[(int)e.Item.ItemIndex];
			cm.Connection.Open();
			try
			{
				cm.ExecuteNonQuery();
				Lbl_show.Text="编辑成功";
				Dgd_userinformation.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				Lbl_show.Text="编辑失败，请检查输入！";
				Lbl_show.Style["color"]="red";
			}
			cm.Connection.Close();
			Bindgrid();
		}
		
		public void DataGrid_delete(object sender,DataGridCommandEventArgs e)
		{
			string strsql="delete from users where User_id=@userid";
			SqlCommand cm=new SqlCommand(strsql,cn);
			cm.Parameters.Add(new SqlParameter("@userid",SqlDbType.VarChar,50));
			cm.Parameters["@userid"].Value=Dgd_userinformation.DataKeys[(int)e.Item.ItemIndex];
			cm.Connection.Open();
			try
			{
				cm.ExecuteNonQuery();
				Lbl_show.Text="删除成功";
				
			}
			catch(SqlException)
			{
				Lbl_show.Text="删除失败";
				Lbl_show.Style["color"]="red";
			}
			cm.Connection.Close();
			Bindgrid();
		}
		public  void Bindgrid()
		{   string strsql="select users.*,teacher.Teacher_name from users,teacher where users.User_id=teacher.Teacher_id";
			SqlDataAdapter da=new SqlDataAdapter(strsql,cn);
			DataSet ds=new DataSet();
			da.Fill(ds);
			Dgd_userinformation.DataSource=ds;
			Dgd_userinformation.DataBind();
		}
	}
}