如何删除单词，以：sign开头，以：sign结尾，而不是c＃中的完整句子

Question

I want to remove the words having : sign (Like :word:) in its both side.I have already use a regular expression to remove all between two : sign. But i need to remove just single words exists between two : sign, not a full sentence (Like :I like to play cricket:).

string txt = "Hello, i :want: to remove :some word from: my text";
var output = Regex.Replace(txt, @" ?\:.*?\:", " ");

Expected Output:

Hello, i to remove some word from my text

Answer 1

the problem is your regex. try this:

 var output = Regex.Replace(txt, @":([A-Za-z0-9]*):", "");

Answer 2

In your regex you're using .* this matches any character except newline. Instead I assume you would like any non-whitespace character. In regex this would be \\S , so in total you would get:

string txt = "Hello, i :want: to remove :some word from: my text";
var output = Regex.Replace(txt, @" ?\:\S*?\:", " ");

Answer 3

Use character class for matching words in your regex.

"\\:\\w\\:"

This will match words surrounded by : on both sides and nothing else.

Answer 4

我建议这个：

var output = Regex.Replace(txt, @":\w+:", "");

Answer 5

You can find all the words having : sign in its both side But it should not have space

string txt = "Hello, i :want: to remove :some word from: my :test:";
var output = Regex.Replace(txt, @" \:\w+\b(?! )\:", " ");