using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.SessionState;namespace WZW.Web.Biz.Core
{
public class DictManager
{
private static DictManager instance = new DictManager(); private static readonly object synRoot = new object(); // 字典目录Map
private HashMap dictCatalogMap = new HashMap(); // 字典Map
private HashMap dictMap = new HashMap(); // 字典列表Map
private HashMap dictListMap = new HashMap(); public static DictManager GetInstance()
{
return instance;
} private void InitDict()
{
lock (synRoot)
{
dictCatalogMap = new HashMap();
dictMap = new HashMap();
dictListMap = new HashMap(); // 获取字典索引
SqlParaMap spm = new SqlParaMap();
spm.AddOrderyBy("dict_memoni");
List<SysDict> sysDictList = SysDictManager.GetInstance().QuerySysDictForList(spm);
foreach (SysDict sysDict in sysDictList)
{
// 初始化字典列表
DictCatalog dictCatalog = new DictCatalog();
dictCatalog.Memoni = sysDict.Dict_memoni;
dictCatalog.Name = sysDict.Dict_name;
dictCatalog.Description = sysDict.Note;
dictCatalogMap.Add(sysDict.Dict_memoni, dictCatalog); // 初始化数据字典列表
spm = new SqlParaMap();
spm.AddEquals("dict_memoni", sysDict.Dict_memoni);
spm.AddOrderyBy("sort,dict_code");
List<SysDictItem> sysDictItemList = SysDictManager.GetInstance().QuerySysDictItemForList(spm);
List<Dict> dictList = new List<Dict>();
foreach (SysDictItem sysDictItem in sysDictItemList)
{
Dict dict = this.GetDict(sysDictItem); dictMap.Add(this.GetKey(dict.Memoni, dict.Code), dict);
dictList.Add(dict);
} dictListMap.Add(sysDict.Dict_memoni, dictList);
}
}
} public string GetText(string memoni, string code)
{
if (dictCatalogMap.Count == 0)
{
this.InitDict();
} string key = this.GetKey(memoni, code); if (dictMap[key] != null)
{
return ((Dict)dictMap[key]).Text;
}
else
{
return code;
}
}
public List<Dict> getDictList(string memoni)
{
if (dictCatalogMap.Count == 0)
{
this.InitDict();
} if (dictListMap.ContainsKey(memoni))
{
return (List<Dict>)dictListMap[memoni];
} return new List<Dict>();
} private string GetKey(string memoni, string code)
{
return memoni + "@@" + code;
} private Dict GetDict(SysDictItem sysDictItem)
{
Dict dict = new Dict();
if (sysDictItem != null)
{
dict.Memoni = sysDictItem.Dict_memoni;
dict.Code = sysDictItem.Dict_code;
dict.Text = sysDictItem.Dict_text;
dict.Color = sysDictItem.Color;
dict.Sort = sysDictItem.Sort;
dict.Description = sysDictItem.Note;
}
return dict;
}
}
}以上代码是初始化字典表一个单例中去，然后在调用绑定到下拉框控件中去的时候，使用DictManager.GetInstance().getDictList(this.memoni);人少的时候发送IIS站点运行正常，人多的时候应用程序池就挂了，说堆栈溢出, 么样解决
导致：
dictCatalogMap = new HashMap();
dictMap = new HashMap();
dictListMap = new HashMap();
每次都会被 新建新的字典；（旧字典留在内存中,交给了 内存回收器）导致：
新的3个字典都会被再次赋值；（内存中就会添加新数据）——————————————————————————————
内存回收器不会频繁工作；
但是你每次都会新建新 字典，添加新数据，旧数据 直接就给 去掉引用了；内存 不爆掉才怪呢！！！
也不知道 每初始化一次，需要浪费多少内存——初始化多少次就会内存溢出.....
现在能够教楼主做的就是这个了： lock (synRoot)
{
if (dictCatalogMap.Count == 0) //在多线程并发时，可能1线程完成初始化，2线程也近来要完成初始化，这时唯一一个多线程可能需要控制的地方；
{
//你的代码
}
｝
{
lock(锁)
{
if(条件)
{
自己的代码
}
}
}
private static DictManager instance = new DictManager();
这是在干什么？类里建一个自己类的静态成员？？？
private void InitDict()
{
lock (synRoot)
{
dictCatalogMap = new HashMap();
dictMap = new HashMap();
dictListMap = new HashMap();这里为什么不用clear?
看不懂
{
lock (synRoot)
{ 这里少了一个判断语句. 当 N个线程同时调用 InitDict 后, 谁先获得锁谁就先执行完LOCK,然后释放锁,交给下一个线程. 下一个线程继续执行 InitDict ,获得锁,又执行初始化....所以你这里你锁定后应该多一个判断,判断是否已经初始化了.写完代码,你可以弄个多线程访问数据测试一下.
2012-02-21 06:16:50 219.140.160.222 9089 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:16:50 221.234.44.19 33730 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:01 111.180.146.26 3628 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:01 125.221.102.151 50073 218.197.81.60 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:01 59.69.25.161 54779 218.197.81.60 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:01 111.180.146.26 3619 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:06 113.57.213.8 59226 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:08 219.139.58.7 4383 218.197.81.61 80 HTTP/1.1 GET /zsjy/hbuezzzs/zzzs/Image.aspx - 1984049823 Connection_Abandoned_By_AppPool hbuezzzs
2012-02-21 06:17:08 219.139.58.7 4385 218.197.81.61 80 HTTP/1.1 POST /zsjy/hbuezzzs/zzzs/Login.aspx - 1984049823 Connection_Abandoned_By_AppPool hbuezzzs
2012-02-21 06:17:11 219.140.160.222 9053 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:11 219.140.160.222 9062 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:15 116.209.92.246 5963 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:20 113.57.213.8 58416 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:30 116.209.92.246 5962 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:41 116.209.92.246 5959 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 116.209.92.246 5977 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 119.99.66.81 48220 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 59.173.217.86 39296 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 116.209.92.246 5961 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 116.209.92.246 5964 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 116.209.92.246 5966 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 116.209.92.246 5960 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:45 119.99.66.81 48218 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:50 202.103.26.3 19543 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:17:55 116.209.92.246 5956 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:18:15 221.234.44.25 29904 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:18:20 61.135.249.207 29661 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:18:46 222.167.84.195 51573 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:18:46 222.167.84.195 51574 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:19:30 221.233.198.51 14298 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:01 58.55.51.86 49804 218.197.81.61 80 HTTP/1.1 GET /zsjy/zs/images/image.swf - 1984049823 Timer_MinBytesPerSecond DefaultAppPool
2012-02-21 06:20:15 121.63.167.228 1896 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:15 121.63.167.228 1902 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:15 121.63.167.228 1897 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:15 121.63.167.228 1901 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:15 121.63.167.228 1906 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:15 121.63.167.228 1898 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:20 58.19.176.210 1916 218.197.81.61 80 - - - - - Timer_ConnectionIdle -
2012-02-21 06:20:25 221.233.198.51 13796 218.197.81.61 80 - - - - - Timer_MinBytesPerSecond -
IIS频繁重启
{
private static DictManager instance = new DictManager();还是感觉你的这个成员，造成了逻辑上的死循环，你自己看看吧。
public static DictManager GetInstance()
{
return instance;
} public static DictManager GetInstance()
{
if (instance == null)
{ lock (synRoot)
{ if (instance == null)
{
instance = new Singleton();
}
}
}
return instance;
}而且还得私有化构造函数private DictManager(){}要这样啊！
为应用程序池 'XXX' 提供服务的进程在与 World Wide Web Publishing 服务通信时遇到致命错误。进程 ID 为 '2088'。数据字段包含错误号。
2. 每次都要初始化
dictCatalogMap = new HashMap();
dictMap = new HashMap();
dictListMap = new HashMap();
这3个对象。这样lock了也没什么意义了吧可能理解的不对
// 字典Map
private HashMap dictMap = new HashMap(); // 字典列表Map
private HashMap dictListMap = new HashMap(); public static DictManager GetInstance()
{
if (instance == null)
{
lock (synRoot)
{
if (instance == null)
{
instance = new DictManager();
}
}
} return instance;
} private void InitDict()
{
lock (synRoot)
{
dictCatalogMap.Clear();
dictMap.Clear();
dictListMap.Clear();
（1）私有静态实例初始为instance=null；
（1）少了private或者protected的构造函数
（2）GetInstance也有错误
private static DictManager instance = null;
private DictManager(){}
public static DictManager GetInstance()
{
if(instance==null)
instance = new DictManager();
return instance;
}
2、lock/unlock应成对出现，而InitDict函数中只加锁，却没解锁
3、dictCatalogMap = new HashMap();
dictMap = new HashMap();
dictListMap = new HashMap();
不要重复初始化