如何使用 Split() 重构此 C# 代码? [英] How can I refactor this C# code using Split()?

问题描述

如何重构它以便 numberOfItems 不必声明为变量?

How can I refactor this so that numberOfItems doesn't have to be declared as a variable?

//method: gets the text in a string in front of a marker, if marker is not there, then return empty string
//example: GetTextAfterMarker("documents/jan/letter043.doc","/") returns "letter043.doc"
//example: GetTextAfterMarker("letter043.doc","/") returns ""
//example: GetTextAfterMarker("letter043.doc",".") returns "doc"
public static string GetTextAfterMarker(string line, string marker)
{
    int numberOfItems = line.Split(new string[] { marker }, StringSplitOptions.None).Count();

    string result = line.Split(new string[] { marker }, StringSplitOptions.None)[numberOfItems-1];
    return line.Equals(result) ? string.Empty : result;
}

推荐答案

如果您使用的是 3.5，这对于 Linq 来说是微不足道的:

If you're using 3.5 this is trivial with Linq:

public static string GetTextAfterMarker2(string line, string marker)
{
  string result = line.Split(new string[] { marker }, StringSplitOptions.None).Last();
  return line.Equals(result) ? string.Empty : result;
}

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