删除字符串开头和结尾之间的部分

Question

首先代码：   string myString = "<at>onePossibleName</at> some question here regarding <at>disPossibleName</at>"    // some code to handle myString and save it in myEditedString    Console.WriteLine(myEditedString);    //output now is: some question here regarding <at>disPossibleName</at>我想<at>onePossibleName</at>从 myString 中删除。该字符串onePossibleName可以disPossbileName是任何其他字符串。到目前为止我正在与string myEditedString = string.Join(" ", myString.Split(' ').Skip(1));这里的问题是，如果onePossibleName变成one Possible Name。尝试也是如此myString.Remove(startIndex, count)- 这不是解决方案。

Answer 1

根据你想要的，会有不同的方法，你可以使用 IndexOf 和 SubString，正则表达式也是一个解决方案。

// SubString and IndexOf method

// Usefull if you don't care of the word in the at tag, and you want to remove the first at tag

if (myString.Contains("</at>"))

{

    var myEditedString = myString.Substring(myString.IndexOf("</at>") + 5);

}

// Regex method

var stringToRemove = "onePossibleName";

var rgx = new Regex($"<at>{stringToRemove}</at>");

var myEditedString = rgx.Replace(myString, string.Empty, 1); // The 1 precise that only the first occurrence will be replaced

Answer 2

string myString = "<at>onePossibleName</at> some question here regarding <at>disPossibleName</at>"

int sFrom = myString.IndexOf("<at>") + "<at>".Length;

int sTo = myString.IndexOf("</at>");

string myEditedString = myString.SubString(sFrom, sFrom - sTo);

Console.WriteLine(myEditedString);

//output now is: some question here regarding <at>disPossibleName</at>

Answer 3

您可以使用这个通用正则表达式。

var myString = "<at>onePossibleName</at> some question here regarding <at>disPossibleName</at>";

var rg = new Regex(@"<at>(.*?)<\/at>");

var result = rg.Replace(myString, "").Trim();

这将删除所有“at”标签及其之间的内容。该Trim()调用是在替换后删除字符串开头/结尾处的所有空格。