dganddrp.aspx.cs

asp.net专家200问(含源代码解决法案

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 CommonFunction
{
	/// <summary>
	/// DgAndDrp 的摘要说明。
	/// </summary>
	public class DgAndDrp : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid dgDrpDown;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			//页面初试化时进行数据绑定
			if(!IsPostBack)
				DataGridDataBind();
		}

		//进行数据绑定
		private void DataGridDataBind()
		{
			//定义数据连接对象,其中数据库连接字符串是在Web.Config文件中定义的
			SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionSqlServer"].ToString());
			//创建数据适配器对象
			SqlDataAdapter da = new SqlDataAdapter("select LastName,FirstName,TitleOfCourtesy,BirthDate,City from Employees",conn);
			//创建DataSet对象
			DataSet ds = new DataSet();
			try
			{
				//填充数据集
				da.Fill(ds,"testTable");
				//进行数据绑定
				dgDrpDown.DataSource = ds.Tables["testTable"];
				dgDrpDown.DataBind();
			}
			catch(Exception error)
			{
				Response.Write(error.ToString());
			}		
		}

		#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.dgDrpDown.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgDrpDown_CancelCommand);
			this.dgDrpDown.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgDrpDown_EditCommand);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void dgDrpDown_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			dgDrpDown.EditItemIndex = -1;
			DataGridDataBind();
		}

		private void dgDrpDown_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			dgDrpDown.EditItemIndex = e.Item.ItemIndex;
			DataGridDataBind();
		}

		public SqlDataReader BindTheTitle()
		{
			//定义数据连接对象,其中数据库连接字符串是在Web.Config文件中定义的
			SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionSqlServer"].ToString());
			SqlCommand cmd =new SqlCommand("select distinct TitleOfCourtesy from Employees", conn);
			conn.Open();
			return cmd.ExecuteReader(CommandBehavior.CloseConnection);			
		}
	}
}