Question

I need to sort an array containing a list of words and search the same using binarysearch. For certain reasons, the word-list must always be sorted using the sorting-rules of "en-US" i.e. American Regional Settings. The code will run under various international Operating Systems and of course, this will mean that the word-list will be sorted differently according to the local Regional Settings in use. One problem could arise on a computer/device running with Lithuanian Regional Settings. Why? Because the letter "Y" in most languages is sorted like X-Y-Z while in Lithuanian, the sort order is I-Y-J. This behavior would create havoc to my program.

On a desktop-PC, I could change momentarily the Regional Settings into American English by using:

线程.当前线程.当前文化 = 区域信息.创建指定区域信息("en-US")

然而，由于我正在开发Windows Mobile（CF.NET）版本，所以无法实现此代码。

我找到了一些可以通过编程方式更改设备区域设置的黑客方法，但它们不是“官方”的，并被认为是有风险的，因此我更喜欢避免使用它们。

So my question is: how can I force Array.Sort and Array.BinarySearch to use CultureInfo = "en-US" while sorting and searching regardless of the Regional Settings set on the device?

我相信我可以使用：

Public Shared Function BinarySearch(Of T) ( _
    array As T(), _
    value As T, _
    comparer As IComparer(Of T) _
) As Integer

and implement Comparer to take into consideration CultureInfo (and set it to "en-US") but I don t know how to do that despite trying hard. If anyone could post some sample-code in VB.Net or C# or an explanation of how to do it, I would be very grateful.

如果您知道任何在CF.Net中起作用的替代方案，那我当然听候您的指示。

谢谢。

编辑：

我将考虑Twanfosson的答案作为被接受的解决方案，因为我的问题清楚地说明我想保持与英语的联系。

However, in means of flexibility, I believe Guffa s answer is the best one. Why? Let s use another example: In German, the letter Ö is sorted Ö-X-Z while in Swedish and Finnish, the order is X-Z-Ö. In Estonian the sort order is Z-Ö-X. Complicated, isn t it? Guffa s solution will let me force Swedish sorting-order (changing CultureInfo) on a device running under German Regional settings. Using Comparer.DefaultInvariant with its association to English wouldn t help in this case, probably the letter Ö would end up with O. Therefore my vote will go to Guffa.

Answer 1

使用不变文化（Invariant culture）是不可能的吗？

InvariantCulture retrieves an instance of the invariant culture. It is associated with the English language but not with any country/region.

Using the invariant culture would make this trivial.

Array.Sort( myArray, Comparer.DefaultInvariant );

Array.BinarySearch( myArray, myString, Comparer.DefaultInvariant );

Answer 2

好的，解决这两个问题的方法是实现一个比较器。创建一个实现IComparer(Of String)接口并拥有自己的CultureInfo对象以用于比较字符串的类：

Public Class StringComparerEnUs
   Implements IComparer(Of String)

   Private _culture As CultureInfo

   Public Sub New()
      _culture = New CultureInfo("en-US")
   End Sub

   Public Function Compare(ByVal x As String, ByVal y As String)
      Return String.Compate(x, y, false, _culture)
   End Function

End Class

Now you can use it to sort the strings:

Array.Sort(theArray, New StringComparerEnUs())

找到它们：

pos = BinarySearch(theArray, "Dent, Arthur", new StringComparerEnUs())

当然，可以通过在构造函数中接受 culture 字符串来使这个类更加通用，你也可以添加一个变量以利用 String.Compare 调用中的 ignoreCase 参数。

Answer 3

请试试看：

class EnglishComparer : IComparer<string>
{
  static CultureInfo __english = new CultureInfo("en-US");

  public int Compare(string x, string y)
  {
    return string.Compare(x, y, __english, CompareOptions.None);
  }
}

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