ASP.NET页面缓存常见的4种方式

本文为大家分享了4种常见的ASP.NET页面缓存方式，供大家参考，具体内容如下

1、分布式缓存Memcached，教程下载

2、内存缓存，此占用服务器资源

#region 内存缓存
 public class MemoryCache
 {
 #region 写
 /// <summary>
 /// 向内存写入数据缓存
 /// </summary>
 /// <remarks>TOMMYHU2011-7-28 10:25创建</remarks>
 /// <param name="cachekey">缓存标识关键字</param>
 /// <param name="cacheresult">需要存放的数据</param>
 /// <param name="cachetime">单位秒</param>
 public static void InertMemoryCache(string cachekey, object cacheresult, int cachetime)
 {
 if (cacheresult != null)
 {
  System.Web.HttpRuntime.Cache.Insert(cachekey, cacheresult, null
  , System.Web.Caching.Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(cachetime));
 }
 }
 #endregion
 #region 读
 /// <summary>
 /// 根据缓存标识读取内存缓存信息
 /// </summary>
 /// <remarks>TOMMYHU2011-7-28 10:25创建</remarks>
 /// <param name="cachekey">缓存标识关键字</param>
 /// <returns>内存缓存数据</returns>
 public static object ReadMemoryCache(string cachekey)
 {
 object obj = System.Web.HttpRuntime.Cache.Get(cachekey);
 if (obj != null)
 {
  return obj;
 }
 return null;
 }
 #endregion
 }
 #endregion 

3、XML缓存，这种最为常见

 #region xml缓存
 public static class XmlCache
 {
 private static string m_CacheFolderName = null; 

 #region 获取/生成缓存文件方法(无cmdParams)
 /// <summary>
 /// 获取/生成缓存文件方法(DataTable)
 /// </summary>
 /// <param name="SQL">用于将Sql转化为MD5字符串</param>
 /// <param name="CacheFilePath">存放Xml文件的相对路径(根目录已预置)</param>
 /// <param name="CacheTime">缓存时间</param>
 /// <param name="DataUsed">使用的数据库的链接字符串</param>
 /// <returns></returns>
 public static DataTable CacheFileByDataTable(string SQL, string CacheFilePath, int CacheTime)
 {
 SQLHelper.SQLHelper QuerySql = new SQLHelper.SQLHelper();
 if (CacheFilePath != string.Empty && CacheFilePath.StartsWith("/"))
 {
  CacheFilePath = CacheFilePath.Remove(0, 1);
 } 

 string SqlMd5 = SQL;//用于将Sql转化为MD5字符串 

 string StrSqlByMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(SqlMd5, "MD5");//生成的Md5文件名 

 string MyCacheFilePath = ""; 

 if (CacheTime >= 10000)//如果大于20天的话系统默认为持久
 {
  MyCacheFilePath = XmlCache.CacheFolderNameP + CacheFilePath;//用于存放Xml文件的相对路径
 }
 else
 {
  MyCacheFilePath = XmlCache.CacheFolderName + CacheFilePath;//用于存放Xml文件的相对路径
 } 

 int MyCacheTime = CacheTime;//缓存时间(分) 

 DataTable dt = new DataTable();//存放数据记录的DataTable 

 DataTable CacheDt = new DataTable();//获取缓存数据记录的DataTable 

 //尝试获取缓存数据记录
 try
 {
  CacheDt = DataTableCache.GetDTCache(MyCacheTime, MyCacheFilePath, StrSqlByMd5);
 }
 catch
 {
  CacheDt = null;
 }
 if (CacheDt != null)//获取到缓存的XML文件
 {
  dt = CacheDt;
 }
 else//未获取到缓存的XML文件
 {
  //生成DataTable(如果用Query查询请用Query.ProcessSql方法)
  //dt = Query.ProcessSql(SqlMd5, DataUsed);
  dt = QuerySql.retDT(SQL); 

  //将DataTable存为XML文件
  try
  {
  if (dt.DataSet != null)
  {
  dt.DataSet.Tables.Remove(dt);
  } 

  DataTableCache.SetDTCache(MyCacheFilePath, StrSqlByMd5, dt);
  }
  catch (Exception ex)
  {
  //Log.GetComLogger().Error("将DataTable存为XML文件出错：" + ex.Message);
  }
 }
 return dt;
 } 

 /// <summary>
 /// 获取/生成缓存文件方法(DataSet) Add By WJ 08-10-23
 /// </summary>
 /// <param name="SQL">用于将Sql转化为MD5字符串</param>
 /// <param name="CacheFilePath">存放Xml文件的相对路径(根目录已预置)</param>
 /// <param name="CacheTime">缓存时间</param>
 /// <param name="DBName">使用的数据库的链接字符串</param>
 /// <returns></returns>
 public static DataSet CacheFileByDataSet(string SQL, string CacheFilePath, int CacheTime)
 {
 SQLHelper.SQLHelper QuerySql = new SQLHelper.SQLHelper();
 if (CacheFilePath != string.Empty && CacheFilePath.StartsWith("/"))
 {
  CacheFilePath = CacheFilePath.Remove(0, 1);
 } 

 string SqlMd5 = SQL;//用于将Sql转化为MD5字符串 

 string StrSqlByMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(SqlMd5, "MD5");//生成的Md5文件名 

 string MyCacheFilePath = XmlCache.CacheFolderName + CacheFilePath;//用于存放Xml文件的相对路径 

 int MyCacheTime = CacheTime;//缓存时间(分) 

 DataSet ds = new DataSet();//存放数据记录的DataSet 

 DataSet CacheDs = new DataSet();//获取缓存数据记录的DataSet 

 //尝试获取缓存数据记录
 try
 {
  CacheDs = DataTableCache.GetDSCache(MyCacheTime, MyCacheFilePath, StrSqlByMd5);
 }
 catch
 {
  CacheDs = null;
 }
 if (CacheDs != null)//获取到缓存的XML文件
 {
  ds = CacheDs;
 }
 else//未获取到缓存的XML文件
 {
  //生成DataSet
  //ds = Query.ProcessMultiSql(SqlMd5, DBName);
  ds = QuerySql.retDS(SQL); 

  //将DataSet存为XML文件
  try
  {
  DataTableCache.SetDSCache(MyCacheFilePath, StrSqlByMd5, ds);
  }
  catch
  { }
 }
 return ds;
 } 

 #endregion 

 #region 获取/生成缓存文件方法(有cmdParams)
 /// <summary>
 /// 获取/生成缓存文件方法(DataTable)
 /// </summary>
 /// <param name="SQL">用于将Sql转化为MD5字符串</param>
 /// <param name="CacheFilePath">存放Xml文件的相对路径(根目录已预置)</param>
 /// <param name="CacheTime">缓存时间</param>
 /// <param name="DataUsed">使用的数据库的链接字符串</param>
 /// <param name="cmdParams">以数组形式提供SqlCommand命令中用到的参数列表</param>
 /// <returns></returns>
 public static DataTable CacheFileByDataTable(string SQL, string CacheFilePath, int CacheTime, string DBConstr, params SqlParameter[] cmdParams)
 {
 SQLHelper.SQLHelper QuerySql = new SQLHelper.SQLHelper();
 if (CacheFilePath != string.Empty && CacheFilePath.StartsWith("/"))
 {
  CacheFilePath = CacheFilePath.Remove(0, 1);
 } 

 string SqlMd5 = SQL;//用于将Sql转化为MD5字符串 

 string sqlmd5params = SQL;
 if (cmdParams != null)
 {
  for (int i = 0; i < cmdParams.Length; i++)
  {
  if (cmdParams[i].Value != null)
  sqlmd5params += cmdParams[i].Value.ToString();
  }
 } 

 string StrSqlByMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sqlmd5params, "MD5");//生成的Md5文件名 

 string MyCacheFilePath = ""; 

 if (CacheTime >= 10000)//如果大于20天的话系统默认为持久
 {
  MyCacheFilePath = XmlCache.CacheFolderNameP + CacheFilePath;//用于存放Xml文件的相对路径
 }
 else
 {
  MyCacheFilePath = XmlCache.CacheFolderName + CacheFilePath;//用于存放Xml文件的相对路径
 } 

 int MyCacheTime = CacheTime;//缓存时间(分) 

 DataTable dt = new DataTable();//存放数据记录的DataTable 

 DataTable CacheDt = new DataTable();//获取缓存数据记录的DataTable 

 //尝试获取缓存数据记录
 CacheDt = DataTableCache.GetDTCache(MyCacheTime, MyCacheFilePath, StrSqlByMd5); 

 if (CacheDt != null)//获取到缓存的XML文件
 {
  dt = CacheDt;
 }
 else//未获取到缓存的XML文件
 {
  //生成DataTable(如果用Query查询请用Query.ProcessSql方法)
  //dt = Query.ProcessSql(SqlMd5, DataUsed);
  dt = QuerySql.retDT(SqlMd5);
  DataTable dt1 = new DataTable();
  if (dt != null)
  {
  dt1 = dt.Copy();
  }
  //将DataTable存为XML文件
  DataTableCache.SetDTCache(MyCacheFilePath, StrSqlByMd5, dt1);
 }
 return dt;
 } 

 /// <summary>
 /// 获取/生成缓存文件方法(DataSet) Add By wjf
 /// </summary>
 /// <param name="SQL">用于将Sql转化为MD5字符串</param>
 /// <param name="CacheFilePath">存放Xml文件的相对路径(根目录已预置)</param>
 /// <param name="CacheTime">缓存时间</param>
 /// <param name="DBName">使用的数据库的链接字符串</param>
 /// <param name="cmdParams">以数组形式提供SqlCommand命令中用到的参数列表</param>
 /// <returns></returns>
 public static DataSet CacheFileByDataSet(string SQL, string CacheFilePath, int CacheTime, string DBConstr, params SqlParameter[] cmdParams)
 {
 SQLHelper.SQLHelper QuerySql = new SQLHelper.SQLHelper();
 string SqlMd5 = SQL;//用于将Sql转化为MD5字符串 

 string sqlmd5params = SQL;
 if (cmdParams != null)
 {
  for (int i = 0; i < cmdParams.Length; i++)
  {
  if (cmdParams[i].Value != null)
  sqlmd5params += cmdParams[i].Value.ToString();
  }
 } 

 string StrSqlByMd5 = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sqlmd5params, "MD5");//生成的Md5文件名 

 string MyCacheFilePath = XmlCache.CacheFolderName + CacheFilePath;//用于存放Xml文件的相对路径 

 int MyCacheTime = CacheTime;//缓存时间(分) 

 DataSet ds = new DataSet();//存放数据记录的DataSet 

 DataSet CacheDs = new DataSet();//获取缓存数据记录的DataSet 

 //尝试获取缓存数据记录
 CacheDs = DataTableCache.GetDSCache(MyCacheTime, MyCacheFilePath, StrSqlByMd5); 

 if (CacheDs != null)//获取到缓存的XML文件
 {
  ds = CacheDs;
 }
 else//未获取到缓存的XML文件
 {
  //生成DataSet
  //ds = Query.ProcessMultiSql(SqlMd5, DBName);
  ds = QuerySql.retDS(SqlMd5);
  DataSet ds1 = new DataSet();
  if (ds != null)
  {
  ds1 = ds.Copy();
  }
  //将DataSet存为XML文件
  DataTableCache.SetDSCache(MyCacheFilePath, StrSqlByMd5, ds1);
 }
 return ds;
 }
 #endregion 

 #region 非持久保持
 /// <summary>
 /// 非持久保持
 /// </summary>
 public static string CacheFolderName
 {
 get
 {
  if (m_CacheFolderName == null)//如果Global.asax中未定义路径
  {
  m_CacheFolderName = System.Configuration.ConfigurationManager.AppSettings.GetValues("CachePathRoot")[0];
  if (m_CacheFolderName == null)//如果Web.Config中未定义路径
  {
  return "/CacheData/" + DateTime.Now.ToString("yyyyMMdd") + "/";
  }
  else
  {
  return m_CacheFolderName + DateTime.Now.ToString("yyyyMMdd") + "/";
  }
  }
  else
  {
  return m_CacheFolderName + DateTime.Now.ToString("yyyyMMdd") + "/";
  }
 } 

 set
 {
  m_CacheFolderName = value;
 }
 }
 #endregion 

 #region 持久保存(例如存放MapBar缓存的数据或需要3个月以上更新的数据等)
 /// <summary>
 /// 持久保存(例如存放MapBar缓存的数据或需要3个月以上更新的数据等)
 /// </summary>
 public static string CacheFolderNameP
 {
 get
 {
  if (m_CacheFolderName == null)//如果Global.asax中未定义路径
  {
  m_CacheFolderName = System.Configuration.ConfigurationManager.AppSettings.GetValues("CachePathRoot")[0];
  if (m_CacheFolderName == null)//如果Web.Config中未定义路径
  {
  return "/CacheData/";
  }
  else
  {
  return m_CacheFolderName;
  }
  }
  else
  {
  return m_CacheFolderName;
  }
 } 

 set
 {
  m_CacheFolderName = value;
 }
 }
 #endregion
 }
 #endregion

4、DATATABLE缓存

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。