网上新建程序池的方法很多，唯独删除程序池方法比较少，所以我记录下删除程序池的方法。
网上找到这种
/// <summary>
/// 删除指定程序池 -虚拟机上跑不通
/// </summary>
/// <param name="appPoolName">程序池名称</param>
/// <returns>true删除成功 false删除失败</returns>
public static bool DeleteAppPool(string appPoolName)
{
Logger.Info("In Method DeleteAppPool()");
bool result = false;
DirectoryEntry appPools = new DirectoryEntry("IIS://localhost/W3SVC/AppPools");
foreach (DirectoryEntry entry in appPools.Children)
{
Logger.Info("In Entry :" + entry.Name);
if (entry.Name.Equals(appPoolName))
{
try
{
Logger.Info("delete Entry :" + entry.Name);
entry.DeleteTree();
Logger.Info("delete success");
result = true;
break;
}
catch
{
result = false;
}
}
}
return result;
}试了下本地能跑通，虚拟机上跑不通，报的错毫无用处，不知道怎么办的情况下问了下我领导，我领导提示我用ServerManage的山删除方法，于是有了
/// <summary>
/// 根据程序池名称删除程序池 - 好用
/// </summary>
/// <param name="poolName"></param>
public static void DeleteAppPool(string poolName)
{
Logger.Info("in DeleteAppPool()");
ServerManager manager = new ServerManager();
manager.ApplicationPools.Remove(manager.ApplicationPools[poolName]);
Logger.Info("FInish Remove:" + poolName);
manager.CommitChanges();
Logger.Info("finsh commit");
}期间，走了很多弯路，现在解释下。
因为我要实现的方法是删除服务器上所有不在使用的程序池，所以开始思路是
由于没有找到方法来获取Application下面应用程序，就不好判断程序池在不在使用中，所以用以下方法来判断程序池是不是在使用中：
获取ServerManager的Site，获取Site的Application，获取Application的ApplicationPoolName，存入使用中程序池列表中，
获取ServerManager的ApplicationPools，用foreanch遍历每个Pool，如该Pool不在使用中程序池列表中，就调用ServerManager.ApplicationPools.Remove方法删除
代码如下：
public static List<string> GetAppPoolNameInUse()
{
ServerManager manager = new ServerManager();
ApplicationPoolCollection pools = manager.ApplicationPools;
SiteCollection sites = manager.Sites;
List<string> poolnameinuse = new List<string>();
foreach (Site site in sites)
{
ApplicationCollection applications = site.Applications;
foreach (Application application in applications)
{
string name = application.ApplicationPoolName;
if (!poolnameinuse.Contains(name))
{
poolnameinuse.Add(name);
}
}
}
return poolnameinuse;
}
public static void ClearAppPoolNotInUse()
{
List<string> poolnameinuse = GetAppPoolNameInUse();
List<string> poolnamenotinuse = new List<string>();
ServerManager manager = new ServerManager();
ApplicationPoolCollection apppools = manager.ApplicationPools;
foreach (ApplicationPool pool in apppools)
{
if (!poolnameinuse.Contains(pool.Name))
{
manager.ApplicationPools.Remove(pool);
}
}
manager.CommitChanges();
}遍历时第一次时候正常，第二个时就会报错，报错如下：
Exception:2015/8/27 13:06:49异常信息：System.InvalidOperationException: Collecti
on was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resour
ce)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at MonitorWarning.IISUtil.ClearAppPoolNotInUse() in d:\Ctrip_Hotel\study_demo
\MonitorWarning\MonitorWarning\IISUtil.cs:line 1010
at MonitorWarning.Program.Main(String[] args) in d:\Ctrip_Hotel\study_demo\Mo
nitorWarning\MonitorWarning\Program.cs:line 24(System.InvalidOperationException:
Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resour
ce)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at MonitorWarning.IISUtil.ClearAppPoolNotInUse() in d:\Ctrip_Hotel\study_demo
\MonitorWarning\MonitorWarning\IISUtil.cs:line 1010
at MonitorWarning.Program.Main(String[] args) in d:\Ctrip_Hotel\study_demo\Mo
nitorWarning\MonitorWarning\Program.cs:line 24)
Finished
分析后发现foreach中Applications第二次用的时候由于上一次有remove而不能用了。考虑用以下方法：
每次传入一个需要删除的applicationname，
然后像事务一样，需新建一个servermanager，用该servermanager得到application，再用该manager删除这个application
代码如下：
#region 清除不在使用中的程序池
public static List<string> GetAppPoolNameInUse()
{
ServerManager manager = new ServerManager();
ApplicationPoolCollection pools = manager.ApplicationPools;
SiteCollection sites = manager.Sites;
List<string> poolnameinuse = new List<string>();
foreach (Site site in sites)
{
ApplicationCollection applications = site.Applications;
foreach (Application application in applications)
{
string name = application.ApplicationPoolName;
if (!poolnameinuse.Contains(name))
{
poolnameinuse.Add(name);
}
}
}
return poolnameinuse;
}
public static void ClearAppPoolNotInUse()
{
List<string> poolnameinuse = GetAppPoolNameInUse();
List<string> poolnamenotinuse = new List<string>();
ServerManager manager = new ServerManager();
ApplicationPoolCollection apppools = manager.ApplicationPools;
foreach (ApplicationPool pool in apppools)
{
if (!poolnameinuse.Contains(pool.Name))
{
poolnamenotinuse.Add(pool.Name);
}
}
foreach (string name in poolnamenotinuse)
{
DeleteAppPool(name);
}
}
/// <summary>
/// 根据程序池名称删除程序池
/// </summary>
/// <param name="poolName"></param>
public static void DeleteAppPool(string poolName)
{
Logger.Info("in DeleteAppPool()");
ServerManager manager = new ServerManager();
manager.ApplicationPools.Remove(manager.ApplicationPools[poolName]);
Logger.Info("FInish Remove:" + poolName);
manager.CommitChanges();
Logger.Info("finsh commit");
}
#endregion如此就能正常工作了。
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