最近在做一个MS的项目,我负责一个检索AD中的用户和组数据信息,这里把她作为一个例子给大家分享。
首先从AD中查询并构造一个对象池,查询检索AD数据是非常耗费时间的,为了不至于让UI没有响应,我采用了使用后台线程来运行AD检索。下面是查询AD中所有组使用的代码:(顺便说一下,DirectorySearcher和SearchResultCollection是System.DirectoryServices下的成员,在使用前要把System.DirectoryServices.dll添加引用项目中)
这个查询在执行时是非常耗费时间的,由于查询并不是非常频繁的更改,所以我这里使用一个缓冲池来保存这些查询结果。
由于缓冲池最后会被异步的访问,可能会有多个线程同时访问她,不得不使用其他来保证这个缓冲池状态不被破坏。我采用创建一个锁来确保同一时间只能有一个线程访问。
private static Object m_groupPoolSync = new Object();
当向缓存池读写数据的时候会对groupPoolSync 对象的加锁。同时会有个全局标识来标识这个池是否已经初始化,这样如果已经有了需要的数据就可以跳过对AD的检索。
有时必须把缓存池清空,这里使用一个统一的方法来做这个,这里方法里也对m_groupPoolSync进行了加锁,因为有可能同时有另外一个线程调用GetAdGroups()方法。
首先从AD中查询并构造一个对象池,查询检索AD数据是非常耗费时间的,为了不至于让UI没有响应,我采用了使用后台线程来运行AD检索。下面是查询AD中所有组使用的代码:(顺便说一下,DirectorySearcher和SearchResultCollection是System.DirectoryServices下的成员,在使用前要把System.DirectoryServices.dll添加引用项目中)
1
private static String[] GetAdGroupsFromAD()
2
{
3
DirectorySearcher srch = new DirectorySearcher();
4![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5
const string query = "(&(objectCategory=group))";
6![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
srch.Filter = query;
8![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
SearchResultCollection sResult = srch.FindAll();
10![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
List<String> results = new List<string>();
12![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13
if (null != sResult)
14
{
15
for (int i = 0; i < sResult.Count; i++)
16
{
17
if (null != sResult[i].Properties["name"] && sResult[i].Properties["name"].Count == 1)
18
{
19
results.Add(sResult[i].Properties["name"][0] as String);
20
}
21
}
22
}
23
return results.ToArray();
24
}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
3
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
8
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
10
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
12
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
14
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
15
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
16
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
17
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
18
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
19
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
20
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
21
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
22
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
23
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
24
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
这个查询在执行时是非常耗费时间的,由于查询并不是非常频繁的更改,所以我这里使用一个缓冲池来保存这些查询结果。
由于缓冲池最后会被异步的访问,可能会有多个线程同时访问她,不得不使用其他来保证这个缓冲池状态不被破坏。我采用创建一个锁来确保同一时间只能有一个线程访问。
private static Object m_groupPoolSync = new Object();
当向缓存池读写数据的时候会对groupPoolSync 对象的加锁。同时会有个全局标识来标识这个池是否已经初始化,这样如果已经有了需要的数据就可以跳过对AD的检索。
1
private static String[] GetAdGroups()
2
{
3![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4
List<String> results = new List<string>();
5![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6
lock (m_groupPoolSync)
7
{
8
if (!m_groupPoolInitialized)
9
{
10
foreach (String result in GetAdGroupsFromAD())
11
{
12
m_groupPool.Add(result);
13
}
14![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
15
m_groupPoolInitialized = true;
16
}
17![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
18
results.AddRange(m_groupPool);
19
}
20![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
21
return results.ToArray();
22
}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
3
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
8
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
10
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
12
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
14
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
15
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
16
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
17
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
18
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
19
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
20
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
21
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
22
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
有时必须把缓存池清空,这里使用一个统一的方法来做这个,这里方法里也对m_groupPoolSync进行了加锁,因为有可能同时有另外一个线程调用GetAdGroups()方法。
1
public static void ClearPools()
2
{
3
lock (m_groupPoolSync)
4
{
5
m_groupPoolInitialized = false;
6
}
7
}
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
3
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
5
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
7
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)