ASP.NET页面缓存常见的4种方式

2017-02-15 .NET
这篇文章主要为大家详细介绍了ASP.NET页面缓存常见的4种方式,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

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