Question

我这样说了。

string test = "http://example.com/upload/user/80_747.jpg"
string test2 = "http://example.com/upload/user/80_4747.jpg"

这两种情况都需要“747”或“4747”。是否有这方面的任何汽车或预产功能,或需要完全人工操作。

ASP. NET C#4.0

Answer 1

你可以把体力与特性分开,然后把最后一批成果阵列同起来。 2. 特性和结果组合的第一层。

缩略语

test.split( _ )[1].split( . )[0];

in CS use SubString and IndexOf methods of String class.

Answer 2

定期表达应当为此付出代价。缩略语:@”_(d+)>。



Regex.Match ("http://example.com/upload/user/80_747.jpg",   @"_(d+).")
    .Groups[1]
    .Captures[0]
    .Value

Answer 3

int startIndex = test.LastIndexOf( _ );
int endIndex = test.LastIndexOf( . );
return test.Substring(startIndex, endIndex - startIndex);

既然你重新使用蚊帐4,如果你目前所描述的扼制格式,你就可以这样做:

return new string(test.SkipWhile(x=>x!= _ ).Skip(1).TakeWhile(x=>x!= . ).ToArray());

Answer 4

You can use System.IO.Path to get the filename without the extension. You will need to parse the fragment that you want out of that filename manually. Using the framework to do that much, over straight regex of the whole path, will be slightly less error prone if, say, there was a _ in one of the folder names.

Answer 5

使用<代码>测试.LastIndexOf(__),以发现最后发生性质。

Answer 6

string val = Path.GetFileNameWithoutExtension(test.Substring(test.LastIndexOf( _ ) + 1));

Answer 7

test
    .ToCharArray()
    .Reverse()
    .SkipWhile(c =>
    {
        int i;
        return !int.TryParse(c.ToString(), out i);
    })
    .TakeWhile(c => c !=  _ );

我认为这不利于你的要求。

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