datapooling.aspx.cs

ASP C#代码实例 适合初学人士学习使用

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 Example_7_11
{
	/// <summary>
	/// Summary description for Connection.
	/// </summary>
	public class DataPooling : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DataGrid myDataGrid;
		private readonly string SQLCONNECTIONSTRING = ConfigurationSettings.AppSettings["SQLCONNECTIONSTRING"].ToString();

		private void Page_Load(object sender, System.EventArgs e)
		{
			if(!Page.IsPostBack)
			{
				ConnectionObject();

				DataSet ds = null;
				for(int i = 0; i < 1000; i++)
				{
					ds = GetCustomers(false);
				}
				myDataGrid.DataSource = ds ;
				myDataGrid.DataBind();
			}
		}

		private void ConnectionObject()
		{
			SqlConnection myConnection = new SqlConnection(SQLCONNECTIONSTRING);
			String cmdText = "SELECT count(*) AS StaffCount FROM Staff";
			SqlCommand myCommand = new SqlCommand(cmdText,myConnection);
			myConnection.Open();
			int result = (int)myCommand.ExecuteScalar();
			Response.Write("Staff表记录的条数为：" + result.ToString() + "条。");
			Response.Write("<br>SQL Server数据库连接的状态：" + myConnection.State.ToString());
			Response.Write("<br>SQL Server数据库连接的通讯包的大小：" + myConnection.PacketSize.ToString());
			Response.Write("<br>SQL Server数据库连接的数据库：" + myConnection.Database.ToString());
			Response.Write("<br>SQL Server数据库连接的工作站点：" + myConnection.WorkstationId.ToString());
			myConnection.Close();
			Response.Write("<br><br>SQL Server数据库连接的状态：" + myConnection.State.ToString());
		}

		private DataSet GetCustomers(bool nStartPooling)
		{
			String connectionString = SQLCONNECTIONSTRING + "Pooling=" + nStartPooling.ToString();		
			SqlConnection myConnection = new SqlConnection(connectionString);
			String cmdText = "Select top 5 Staff_ID,Staff_Name,Email from Staff";
			
			SqlDataAdapter da = new SqlDataAdapter(cmdText,myConnection);
			myConnection.Open();
			DataSet ds = new DataSet();
			da.Fill(ds);

			myConnection.Close();
			return(ds);
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}