实现站点计数器的用户控件

资源:同级目录下的存放当前计数的count.txt文件
子目录pic下的0到9的数字图片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="宋体">
<TABLE id="table_counter" cellSpacing="0" cellPadding="0" width="750" align="center" border="0"
runat="server">
<TR>
<TD style="HEIGHT: 23px" 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 的摘要说明。
 /// </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)
  {
   // 在此处放置用户代码以初始化页面
   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是读中文
   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
 }
}
 

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