Question

如何使用C＃/ LINQ从字符串中删除后缀并将其返回？例如：

string[] suffixes = { "Plural", "Singular", "Something", "SomethingElse" };

string myString = "DeleteItemMessagePlural";

string stringWithoutSuffix = myString.???; // what do I do here?

// stringWithoutSuffix == "DeleteItemMessage"

Answer 1

var firstMatchingSuffix = suffixes.Where(myString.EndsWith).FirstOrDefault();
if (firstMatchingSuffix != null)
    myString = myString.Substring(0, myString.LastIndexOf(firstMatchingSuffix));

Answer 2

您需要从列表中构建正则表达式：

var regex = new Regex("(" + String.Join("|", list.Select(Regex.Escape)) + ")$");

string stringWithoutSuffix = regex.Replace(myString, "");

Answer 3

// Assuming there is exactly one matching suffix (this will check that)
var suffixToStrip = suffixes.Single(x => myString.EndsWith(x));

// Replace the matching one:
var stringWithoutSuffix =  Regex.Replace(myString, "(" +suffixToStrip + ")$", "");

OR，因为您知道匹配后缀的长度：

// Assuming there is exactly one matching suffix (this will check that)
int trim = suffixes.Single(x => myString.EndsWith(x)).Length;

// Remove the matching one:
var stringWithoutSuffix =  myString.Substring(0, myString.Length - trim);

如果列表中包含后缀，则使用LINQ从字符串中去除后缀？

3 个答案: