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ASP.Net使用缓存技术提高效率

 2006-03-26 17:05:39 来源:WEB开发网   
核心提示:asp.net的缓存技术大大地提高了效率,本人将代码的简单的实现代码贴出:一、在页面中显示时,ASP.Net使用缓存技术提高效率,读缓存数据,加载xml数据public void LoadData() { DataView Source = (DataView)Cache["MyData"];

asp.net的缓存技术大大地提高了效率,本人将代码的简单的实现代码贴出:

一、在页面中显示时,读缓存数据,加载xml数据

public void LoadData()
  {
  DataView Source = (DataView)Cache["MyData"];
  if(Source == null)
  {
   DataSet ds = new DataSet();
   FileStream fs = new FileStream(Server.MapPath("LoginMsg.xml"), FileMode.Open,Fileaccess.Read);
   StreamReader reader = new StreamReader(fs);
   ds.ReadXml(reader);
   fs.Close();
   Source = new DataView(ds.Tables[0]);
   Cache.Insert("MyData", Source, new CacheDependency(Server.MapPath("LoginMsg.xml")));
   ErrorMsg.Text = "从文件中读取的数据";
  }
  else
  {
   ErrorMsg.Text = "从缓存中读取的数据";
  }
  MyDataGrid.DataSource = Source;
  MyDataGrid.DataBind();
  }

二、用XML存储交互数据,将数据放置到缓存中

PRivate void LoginMsg_Click(object sender, System.EventArgs e)
  {
  if(!Page.IsValid)
  {
   ErrorMsg.Text = "必需输入登录信息";
   return;
  }
  DataSet ds = new DataSet();
  FileStream fs = new FileStream(Server.MapPath("LoginMsg.xml"),FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
  StreamReader reader = new StreamReader(fs);
  ds.ReadXml(reader);
  fs.Close();
  DataTable dt = ds.Tables[0];
  DataRow newrow = dt.NewRow();
  newrow["custom_email"] = CustomEamil.Text;
  newrow["custom_pass"] = CustomPass.Text;
  newrow["login_time"] = DateTime.Now.ToString();
  fs = new FileStream(Server.MapPath("LoginMsg.xml"), FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite);
  TextWriter writer = new StreamWriter(fs);
  writer = TextWriter.Synchronized(writer);
  ds.Tables[0].Rows.Add(newrow);
  ds.WriteXml(writer);
  writer.Close();
  Cache.Remove("MyData");
  LoadData();

  }

Tags:ASP Net 使用

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