st_classes.aspx.cs

本人上传的是学生管理系统,希望能给广大编程爱好都以帮助

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>
	/// _class 的摘要说明。
	/// </summary>
	public class ST_classes : System.Web.UI.Page
	{
		SqlConnection st_conn;
		protected System.Web.UI.WebControls.TextBox st_tbx_name;
		protected System.Web.UI.WebControls.TextBox st_tbx_id;
		protected System.Web.UI.WebControls.Button st_btn_search;
		protected System.Web.UI.WebControls.DataGrid st_dtg_class;
		protected System.Web.UI.WebControls.Label st_lbl_note;
		protected System.Web.UI.WebControls.Button st_btn_exit;
		string st_sqlstr;
		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) 
				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.st_btn_search.Click += new System.EventHandler(this.st_btn_search_Click);
			this.st_btn_exit.Click += new System.EventHandler(this.st_btn_exit_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void st_btn_exit_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("default.aspx");
		}
		public void DataGrid_Page(object sender,DataGridPageChangedEventArgs e)
		{
			st_dtg_class.CurrentPageIndex=e.NewPageIndex;
			ST_BindGrid();
		}
		public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
		{		
			st_dtg_class.EditItemIndex=(int)e.Item.ItemIndex;
			ST_BindGrid();	
		}
		public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
		{			
			st_dtg_class.EditItemIndex=-1;
			ST_BindGrid();	
		}
		public void DataGrid_delete(object sender,DataGridCommandEventArgs e)
		{		
			string st_sqlstr="delete from ST_class where ST_Class_id=@class_id";
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@class_id",SqlDbType.VarChar,50));
			st_comm.Parameters["@class_id"].Value=st_dtg_class.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_note.Text="删除成功";
				
			}
			catch(SqlException)
			{
				st_lbl_note.Text="删除失败";
				st_lbl_note.Style["color"]="red";
			}
			st_comm.Connection.Close();			
			ST_BindGrid();
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			//数据库更新字符串
			string st_sqlstr="update ST_class set ST_Class_name=@Class_name,ST_Class_department=@Class_department,ST_Class_college=@Class_college,ST_Class_teacherid=@Class_teacherid where ST_Class_id=@Class_id";
			//创建更新命令
			SqlCommand st_comm=new SqlCommand(st_sqlstr,st_conn);
			st_comm.Parameters.Add(new SqlParameter("@Class_name",SqlDbType.VarChar,50));
			st_comm.Parameters.Add(new SqlParameter("@Class_department",SqlDbType.VarChar,50));
			st_comm.Parameters.Add(new SqlParameter("@Class_college",SqlDbType.VarChar,50));
			st_comm.Parameters.Add(new SqlParameter("@Class_teacherid",SqlDbType.VarChar,50));
			st_comm.Parameters.Add(new SqlParameter("@Class_id",SqlDbType.VarChar,50));
			string st_st_colvalue=((TextBox)e.Item.Cells[1].Controls[0]).Text;
			st_comm.Parameters["@Class_name"].Value=st_st_colvalue;
			st_st_colvalue=((TextBox)e.Item.Cells[2].Controls[0]).Text;
			st_comm.Parameters["@Class_department"].Value=st_st_colvalue;
			st_st_colvalue=((TextBox)e.Item.Cells[3].Controls[0]).Text;
			st_comm.Parameters["@Class_college"].Value=st_st_colvalue;
			st_st_colvalue=((TextBox)e.Item.Cells[4].Controls[0]).Text;
			st_comm.Parameters["@Class_teacherid"].Value=st_st_colvalue;
			st_comm.Parameters["@Class_id"].Value=st_dtg_class.DataKeys[(int)e.Item.ItemIndex];
			st_comm.Connection.Open();
			try
			{
				st_comm.ExecuteNonQuery();
				st_lbl_note.Text="编辑成功";
				st_dtg_class.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				st_lbl_note.Text="编辑失败";
				st_lbl_note.Style["color"]="red";
			}
			st_comm.Connection.Close();		
			ST_BindGrid();
			
		}
		public void ST_BindGrid()
		{
			st_sqlstr="select * from ST_class";
			SqlDataAdapter st_st_da=new SqlDataAdapter(st_sqlstr,st_conn);
			DataSet st_ds=new DataSet();
			st_st_da.Fill(st_ds);
			st_dtg_class.DataSource=st_ds;
			st_dtg_class.DataBind();
		}

		private void st_btn_search_Click(object sender, System.EventArgs e)
		{
			st_sqlstr="select * from ST_class  where ST_Class_id='"+st_tbx_id.Text+"'or ST_Class_name='"+st_tbx_name.Text+"'";
			SqlDataAdapter st_st_da=new SqlDataAdapter(st_sqlstr,st_conn);
			DataSet st_ds=new DataSet();
			st_st_da.Fill(st_ds);
			st_dtg_class.DataSource=st_ds;
			st_dtg_class.DataBind();
		}


	}
}