我有一些准备好的代码来获取字符串中的单词列表:(扩展方法,必须在静态类中)
/// <summary>
/// Gets a list of words in the text. A word is any string sequence between two separators.
/// No word is added if separators are consecutive (would mean zero length words).
/// </summary>
public static List<string> GetWords(this string Text, char WordSeparator)
{
List<int> SeparatorIndices = Text.IndicesOf(WordSeparator.ToString(), true);
int LastIndexNext = 0;
List<string> Result = new List<string>();
foreach (int index in SeparatorIndices)
{
int WordLen = index - LastIndexNext;
if (WordLen > 0)
{
Result.Add(Text.Substring(LastIndexNext, WordLen));
}
LastIndexNext = index + 1;
}
return Result;
}
/// <summary>
/// returns all indices of the occurrences of a passed string in this string.
/// </summary>
public static List<int> IndicesOf(this string Text, string ToFind, bool IgnoreCase)
{
int Index = -1;
List<int> Result = new List<int>();
string T, F;
if (IgnoreCase)
{
T = Text.ToUpperInvariant();
F = ToFind.ToUpperInvariant();
}
else
{
T = Text;
F = ToFind;
}
do
{
Index = T.IndexOf(F, Index + 1);
Result.Add(Index);
}
while (Index != -1);
Result.RemoveAt(Result.Count - 1);
return Result;
}
/// <summary>
/// Implemented - returns all the strings in uppercase invariant.
/// </summary>
public static string[] ToUpperAll(this string[] Strings)
{
string[] Result = new string[Strings.Length];
Strings.ForEachIndex(i => Result[i] = Strings[i].ToUpperInvariant());
return Result;
}