classes.aspx.cs

--- --- --学生管理系统

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
{
    //该源码下载自www.51aspx.com(５１ａｓｐｘ．ｃｏｍ)

	/// <summary>
	/// _class 的摘要说明。
	/// </summary>
	public class classes : System.Web.UI.Page
	{
		SqlConnection cn;
		protected System.Web.UI.WebControls.Label Lbl_note;
		protected System.Web.UI.WebControls.TextBox Tbx_name;
		protected System.Web.UI.WebControls.TextBox Tbx_id;
		protected System.Web.UI.WebControls.Button Btn_search;
		protected System.Web.UI.WebControls.DataGrid Dgd_class;
		protected System.Web.UI.WebControls.Button Btn_exit;
		string strsql;
		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) 
				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.Btn_search.Click += new System.EventHandler(this.Btn_search_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#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_delete(object sender,DataGridCommandEventArgs e)
		{		
			string strsql="delete from class where Class_id=@class_id";
			SqlCommand cm=new SqlCommand(strsql,cn);
			cm.Parameters.Add(new SqlParameter("@class_id",SqlDbType.VarChar,50));
			cm.Parameters["@class_id"].Value=Dgd_class.DataKeys[(int)e.Item.ItemIndex];
			cm.Connection.Open();
			try
			{
				cm.ExecuteNonQuery();
				Lbl_note.Text="删除成功";
				
			}
			catch(SqlException)
			{
				Lbl_note.Text="删除失败";
				Lbl_note.Style["color"]="red";
			}
			cm.Connection.Close();			
			Bindgrid();
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			string strsql="update class set Class_name=@Class_name,Class_department=@Class_department,Class_college=@Class_college,Class_teacherid=@Class_teacherid where Class_id=@Class_id";
			SqlCommand cm=new SqlCommand(strsql,cn);
			cm.Parameters.Add(new SqlParameter("@Class_name",SqlDbType.VarChar,50));
			cm.Parameters.Add(new SqlParameter("@Class_department",SqlDbType.VarChar,50));
			cm.Parameters.Add(new SqlParameter("@Class_college",SqlDbType.VarChar,50));
			cm.Parameters.Add(new SqlParameter("@Class_teacherid",SqlDbType.VarChar,50));
			cm.Parameters.Add(new SqlParameter("@Class_id",SqlDbType.VarChar,50));
			string colvalue=((TextBox)e.Item.Cells[1].Controls[0]).Text;
			cm.Parameters["@Class_name"].Value=colvalue;
			colvalue=((TextBox)e.Item.Cells[2].Controls[0]).Text;
			cm.Parameters["@Class_department"].Value=colvalue;
			colvalue=((TextBox)e.Item.Cells[3].Controls[0]).Text;
			cm.Parameters["@Class_college"].Value=colvalue;
			colvalue=((TextBox)e.Item.Cells[4].Controls[0]).Text;
			cm.Parameters["@Class_teacherid"].Value=colvalue;
			cm.Parameters["@Class_id"].Value=Dgd_class.DataKeys[(int)e.Item.ItemIndex];
			cm.Connection.Open();
			try
			{
				cm.ExecuteNonQuery();
				Lbl_note.Text="编辑成功";
				Dgd_class.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				Lbl_note.Text="编辑失败";
				Lbl_note.Style["color"]="red";
			}
			cm.Connection.Close();		
			Bindgrid();
			
		}
		public void Bindgrid()
		{
			strsql="select * from class";
			SqlDataAdapter da=new SqlDataAdapter(strsql,cn);
			DataSet ds=new DataSet();
			da.Fill(ds);
			Dgd_class.DataSource=ds;
			Dgd_class.DataBind();
		}

		private 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+"'";
			SqlDataAdapter da=new SqlDataAdapter(strsql,cn);
			DataSet ds=new DataSet();
			da.Fill(ds);
			Dgd_class.DataSource=ds;
			Dgd_class.DataBind();
		}


	}
}