如何阅读＆QUOT; uSNChanged＆QUOT;使用C＃属性

问题描述

我想用C＃来获得，通过在ActiveDirectory中的 uSNChanged 值的最后修改或创建的属性...我也试图找到<$ C的最大值$ C> uSNChanged ，你能不能帮我找出解决办法？谢谢

I want to get the last modified or created attributes via the uSNChanged value in ActiveDirectory using C# ... I was also trying to find the max value of uSNChanged, can you help me to find out the solution? Thanks

推荐答案

有两种方式来获取通过.NET中的 uSNChanged 属性：

There are two ways to retrieve the uSNChanged property via .NET:

1. 中提及一个COM库：活动DS类型库，那么你就需要使用 IADsLargeInterger 检索值，并最终将其转换为一个长。 例如：

1. Include a reference to a COM library: "Active DS Type Library", then you need to use the IADsLargeInterger to retrieve the value and finally convert it to a long. For example:

IADsLargeInteger li_ad = (IADsLargeInteger)oUser.Properties["USNChanged"].Value;
long l_uChanged = GetLongFromLargeInteger( li_ad );

static long GetLongFromLargeInteger(  IADsLargeInteger  Li )
{
    long retval = Li.HighPart;
    retval <<=32;
    retval |=(uint)Li.LowPart;
    return retval;
}

翻译只能使用C＃中的值。感谢Simon Gilbee ，我们有这个选项：

Translate the values only using C#. Thanks to Simon Gilbee, we have this option:

long usnChanged = CovertADSLargeIntegerToInt64(oUser.Properties["USNChanged"].Value);

public static Int64 ConvertADSLargeIntegerToInt64(object adsLargeInteger)
{
  var highPart = (Int32)adsLargeInteger.GetType().InvokeMember("HighPart", System.Reflection.BindingFlags.GetProperty, null, adsLargeInteger, null);
  var lowPart  = (Int32)adsLargeInteger.GetType().InvokeMember("LowPart",  System.Reflection.BindingFlags.GetProperty, null, adsLargeInteger, null);
  return highPart * ((Int64)UInt32.MaxValue + 1) + lowPart;
}

我强烈建议你去与选项＃2 以避免与旧的问题ActiveDs库，他们不必回答过的。

I highly recommend you go with Option #2 to avoid problems with the legacy ActiveDs library and won't need answers off this list.

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