editscene.aspx.cs

本目录提供了<<ASP.NET+SQL Server数据库开发与实例>>一书从第4到第11章实例的核心源程序、数据库文件。

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Configuration;

namespace travel.main
{
	/// <summary>
	/// editscene 的摘要说明。
	/// </summary>
	public class editscene : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Lbl_note;
		protected System.Web.UI.WebControls.DataGrid scene;
		protected System.Web.UI.HtmlControls.HtmlForm Form1;
		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["ConnectionString"];
			cn=new SqlConnection(strconn);
			if(!IsPostBack)		BindGrid();
		}

		#region Web 窗体设计器生成的代码
		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)
		{
			scene.CurrentPageIndex=e.NewPageIndex;
			BindGrid();
		}
		public void BindGrid()
		{
			SqlDataAdapter da=new SqlDataAdapter("select * from scene",cn);
			DataSet ds=new DataSet();
			da.Fill(ds);
			scene.DataSource=ds;
			scene.DataBind();
		}
		public void DataGrid_cancel(object sender,DataGridCommandEventArgs e)
		{
			
			scene.EditItemIndex=-1;
			BindGrid();
			
		}
		public void DataGrid_edit(object sender,DataGridCommandEventArgs e)
		{
			
			scene.EditItemIndex=(int)e.Item.ItemIndex;
		
			BindGrid();
			
		}
		public void DataGrid_update(object sender,DataGridCommandEventArgs e)
		{
			SqlCommand cm=new SqlCommand("update_scene",cn);
			cm.CommandType=CommandType.StoredProcedure;
			cm.Parameters.Add(new SqlParameter("@scene_name",SqlDbType.VarChar,100));				
			cm.Parameters.Add(new SqlParameter("@place",SqlDbType.VarChar,50));			
			cm.Parameters.Add(new SqlParameter("@photo",SqlDbType.VarChar,50));
			cm.Parameters.Add(new SqlParameter("@show",SqlDbType.Text,16));
			cm.Parameters.Add(new SqlParameter("@id",SqlDbType.Int,4));

			string colvalue=((TextBox)e.Item.Cells[1].Controls[0]).Text;
			cm.Parameters["@scene_name"].Value=colvalue;

			colvalue=((TextBox)e.Item.Cells[2].Controls[0]).Text;
			cm.Parameters["@place"].Value=colvalue;	
		
			colvalue=((TextBox)e.Item.Cells[3].Controls[0]).Text;
			cm.Parameters["@photo"].Value=colvalue;

			colvalue=((TextBox)e.Item.Cells[4].Controls[0]).Text;
			cm.Parameters["@show"].Value=colvalue;	
					
			cm.Parameters["@id"].Value=scene.DataKeys[(int)e.Item.ItemIndex];
			cm.Connection.Open();
			try
			{
				cm.ExecuteNonQuery();
				Lbl_note.Text="编辑成功";
				scene.EditItemIndex=-1;
			}
			catch(SqlException)
			{
				Lbl_note.Text="编辑失败";
				Lbl_note.Style["color"]="red";
			}
			cm.Connection.Close();		
			BindGrid();
			
		}
		
		public void DataGrid_delete(object sender,DataGridCommandEventArgs e)
		{
			
			SqlCommand cm=new SqlCommand("del_scene",cn);
			cm.CommandType=CommandType.StoredProcedure;

			cm.Parameters.Add(new SqlParameter("@id",SqlDbType.Int,4));
			cm.Parameters["@id"].Value=scene.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();
		}
	}
}