asp.net中用C#實現站點計數器用戶控件

資源：同級目錄下的存放當前計數的count.txt文件 
子目錄pic下的0到9的數字圖片0.gif ~ 9.gif 
-------------------------------- 
asax文件： 
<%@ Control Language="c#" AutoEventWireup="false" Codebehind="counter.ascx.cs" Inherits="JiAnWeb.counter" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%> 
<LINK href="css.CSS" rel="stylesheet"> 
<FONT face="宋體"> 
<TABLE id="table_counter" cellSpacing="0" cellPadding="0" width="750" align="center" border="0" 
runat="server"> 
<TR> 
<TD align="center" valign=middle><IMG height="1" alt="" src="pic\rightblueback.gif" width="700"></TD> 
</TR> 
<TR> 
<TD align=center valign=middle></TD> 
</TR> 
</TABLE> 
</FONT> 
－－－－－－－－－－－－－－－－－－－ 
.cs文件： 
namespace JiAnWeb 
{ 
using System; 
using System.Data; 
using System.Drawing; 
using System.Web; 
using System.Web.UI.WebControls; 
using System.Web.UI.HtmlControls;

/// <summary> 
/// counter 的摘要說明。 
/// </summary> 
public class counter : System.Web.UI.UserControl 
{ 
protected System.Web.UI.HtmlControls.HtmlTable table_counter;

private void Page_Load(object sender, System.EventArgs e) 
{ 
// 在此處放置用戶代碼以初始化頁面 
string filePath=System.Web.HttpContext.Current.Server.MapPath("hits.txt"); 
System.IO.StreamReader srReadLine = new System.IO.StreamReader( 
System.IO.File.OpenRead(filePath), 
System.Text.Encoding.ASCII);//Encoding.Default是讀中文 
srReadLine.BaseStream.Seek(0, System.IO.SeekOrigin.Begin);// 
string countStr=""; 
if (srReadLine.Peek() > -1) 
{ 
countStr+=srReadLine.ReadLine(); 
} 
int count=int.Parse(countStr)+1; 
countStr=count.ToString(); 
srReadLine.Close(); 
table_counter.Rows[1].Cells[0].InnerHtml="<font color=\"#009900\">"; 
for (int i=0;i<countStr.Length;i++) 
{ 
table_counter.Rows[1].Cells[0].InnerHtml=table_counter.Rows[1].Cells[0].InnerHtml+"<img src=\"pic\\"+countStr.Substring(i,1)+".gif\">"; 
} 
table_counter.Rows[1].Cells[0].InnerHtml+="</font>";

// Write the string to a file. 
System.IO.StreamWriter file = new System.IO.StreamWriter(filePath); 
file.WriteLine(countStr,false);

file.Close(); 
srReadLine.Close(); 
}

#region Web 窗體設計器生成的代碼 
override protected void OnInit(EventArgs e) 
{ 
// 
// CODEGEN: 該調用是 ASP.Net Web 窗體設計器所必需的。 
// 
InitializeComponent(); 
base.OnInit(e); 
}

/// <summary> 
/// 設計器支持所需的方法 - 不要使用代碼編輯器 
/// 修改此方法的內容。 
/// </summary> 
private void InitializeComponent() 
{ 
this.Load += new System.EventHandler(this.Page_Load);

} 
#endregion 
} 
}