st_userlist.aspx.cs

学生管理系统（asp.net+sql server）

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 STGROUP
{
	/// <summary>
	/// ST_userlist 的摘要说明。
	/// </summary>
	public class ST_userlist : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid st_dtg_userinformation;
		protected System.Web.UI.WebControls.Label st_lbl_show;
	    SqlConnection st_conn;
		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 st_connstr= ConfigurationSettings.AppSettings["st_dbconn"];
			st_conn=new SqlConnection(st_connstr);
			if(!IsPostBack)
			{
				if(Request.QueryString["ST_Teacher_id"]=="-1") st_lbl_show.Text="";
				else
				{
						st_conn.Open();
					string st_sqlstr="insert into ST_users(ST_User_id,ST_User_password,ST_User_power) values(@userid,@userpwd,1)";
					SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
					st_comm.Parameters.Add(new SqlParameter("@userid",SqlDbType.VarChar,50));
					st_comm.Parameters["@userid"].Value=Request.QueryString["ST_Teacher_id"];
					st_comm.Parameters.Add(new SqlParameter("@userpwd",SqlDbType.VarChar,50));
					st_comm.Parameters["@userpwd"].Value=Request.QueryString["ST_Teacher_id"];
					try
					{
						st_comm.ExecuteNonQuery();		
				
					}
					catch(SqlException)
					{
						st_lbl_show.Text="添加失败,请返回";
						st_lbl_show.Style["color"]="red";
					}
					st_conn.Close();
				}
				ST_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)
		{
			st_dtg_userinformation.CurrentPageIndex=e.NewPageIndex;
			ST_BindGrid();
		}
		public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
		{
			st_dtg_userinformation.EditItemIndex=-1;
			ST_BindGrid();
		}
		public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
		{
			st_dtg_userinformation.EditItemIndex=(int)e.Item.ItemIndex;
			ST_BindGrid();
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			//更新命令字符串
			string st_sqlstr="update ST_users set ST_User_power=@kind where ST_User_id=@uid";
			//创建更新命令
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@uid",SqlDbType.VarChar,50));		
			st_comm.Parameters.Add(new SqlParameter("@kind",SqlDbType.Int,4));
			string st_colvalue=((DropDownList)e.Item.FindControl("st_ddl_users")).SelectedIndex.ToString();
			st_comm.Parameters["@kind"].Value=st_colvalue;
			st_comm.Parameters["@uid"].Value=st_dtg_userinformation.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_show.Text="编辑成功";
				st_dtg_userinformation.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				st_lbl_show.Text="编辑失败，请检查输入！";
				st_lbl_show.Style["color"]="red";
			}
			st_comm.Connection.Close();
			//数据绑定
			ST_BindGrid();
		}
		
		public void DataGrid_delete(object sender,DataGridCommandEventArgs e)
		{
			string st_sqlstr="delete from ST_users where ST_User_id=@userid";
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@userid",SqlDbType.VarChar,50));
			st_comm.Parameters["@userid"].Value=st_dtg_userinformation.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_show.Text="删除成功";
				
			}
			catch(SqlException)
			{
				st_lbl_show.Text="删除失败";
				st_lbl_show.Style["color"]="red";
			}
			st_comm.Connection.Close();
			ST_BindGrid();
		}
		public  void ST_BindGrid()
		{   string st_sqlstr="select ST_users.*,ST_teacher.ST_Teacher_name from ST_users,ST_teacher where ST_users.ST_User_id=ST_teacher.ST_Teacher_id";
			SqlDataAdapter st_da=new SqlDataAdapter(st_sqlstr,st_conn);
			DataSet st_ds=new DataSet();
			st_da.Fill(st_ds);
			st_dtg_userinformation.DataSource=st_ds;
			st_dtg_userinformation.DataBind();
		}
	}
}