将URL转换为c#字符串中的超链接的最简单方法?

I am consuming the Twitter API and want to convert all URLs to hyperlinks.

我正在使用Twitter API，并希望将所有url转换为超链接。

What is the most effective way you've come up with to do this?

你想出的最有效的方法是什么?

from

从

string myString = "This is my tweet check it out http://tinyurl.com/blah";

来

This is my tweet check it out <a href="http://tinyurl.com/blah">http://tinyurl.com/>blah</a>

5 个解决方案

#1

Regular expressions are probably your friend for this kind of task:

正则表达式可能是这类任务的朋友:

Regex r = new Regex(@"(https?://[^\s]+)");
myString = r.Replace(myString, "<a href=\"$1\">$1</a>");

The regular expression for matching URLs might need a bit of work.

匹配url的正则表达式可能需要做一些工作。

#2

I did this exact same thing with jquery consuming the JSON API here is the linkify function:

我在jquery使用JSON API时做了同样的事情这是linkify函数:

String.prototype.linkify = function() {
    return this.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+/, function(m) {
        return m.link(m);
    });
 };

#3

This is actually an ugly problem. URLs can contain (and end with) punctuation, so it can be difficult to determine where a URL actually ends, when it's embedded in normal text. For example:

这实际上是一个丑陋的问题。URL可以包含标点(并以标点结尾)，因此当URL嵌入到普通文本中时，很难确定它实际上在哪里结束。例如:

http://example.com/.

is a valid URL, but it could just as easily be the end of a sentence:

是一个有效的URL，但它也可以很容易地成为一句话的结尾:

I buy all my witty T-shirts from http://example.com/.

You can't simply parse until a space is found, because then you'll keep the period as part of the URL. You also can't simply parse until a period or a space is found, because periods are extremely common in URLs.

您不能简单地解析，直到找到一个空格，因为这样您将把句点作为URL的一部分。您也不能简单地解析一个句点或找到一个空格，因为句点在url中非常常见。

Yes, regex is your friend here, but constructing the appropriate regex is the hard part.

是的，regex是您的朋友，但是构建适当的regex是困难的部分。

Check out this as well: Expanding URLs with Regex in .NET.

也可以看看这个:在。net中使用Regex扩展url。

#4

You can add some more control on this by using MatchEvaluator delegate function with regular expression: suppose i have this string:

通过使用MatchEvaluator委托函数并使用正则表达式，可以在上面添加更多的控件:假设我有这个字符串:

find more on http://www.*.com

now try this code

现在试试这个代码

private void ModifyString()
{
    string input = "find more on http://www.authorcode.com ";
                Regex regx = new Regex(@"\b((http|https|ftp|mailto)://)?(www.)+[\w-]+(/[\w- ./?%&=]*)?");
                string result = regx.Replace(input, new MatchEvaluator(ReplaceURl));
}

static string ReplaceURl(Match m)
{
    string x = m.ToString();
    x = "< a href=\"" + x + "\">" + x + "</a>";
    return x;
}

#5

/cheer for RedWolves

/为RedWolves

from: this.replace(/[A-Za-z]+://[A-Za-z0-9-]+.[A-Za-z0-9-:%&\?/.=]+/, function(m){...

来自:this.replace(/[A-Za-z]+:/ /[A-Za-z0-9 -]+。[A-Za-z0-9 -:% & \ ? /。=]+ /函数(m){…

see: /[A-Za-z]+://[A-Za-z0-9-]+.[A-Za-z0-9-:%&\?/.=]+/

见:[A-Za-z]+:/ /[A-Za-z0-9 -]+。[A-Za-z0-9 -:% & \ ? / =]。+ /

There's the code for the addresses "anyprotocol"://"anysubdomain/domain"."anydomainextension and address",

这是地址“anyprotocol”://“anysubdomain/domain”的代码。anydomainextension和地址”,

and it's a perfect example for other uses of string manipulation. you can slice and dice at will with .replace and insert proper "a href"s where needed.

这是字符串处理的一个很好的例子。你可以用.replace随意切片，并在需要的地方插入适当的“a href”。

I used jQuery to change the attributes of these links to "target=_blank" easily in my content-loading logic even though the .link method doesn't let you customize them.

我使用jQuery在我的内容加载逻辑中很容易地将这些链接的属性更改为“target=_blank”，尽管.link方法不允许您自定义它们。

I personally love tacking on a custom method to the string object for on the fly string-filtering (the String.prototype.linkify declaration), but I'm not sure how that would play out in a large-scale environment where you'd have to organize 10+ custom linkify-like functions. I think you'd definitely have to do something else with your code structure at that point.

我个人喜欢在动态字符串过滤(string .prototype)中为字符串对象添加自定义方法。但是我不确定在大型环境中如何实现这一点，在这种环境中，您必须组织10多个自定义的类似于linkify的函数。我认为此时您肯定需要对代码结构做一些其他的事情。

Maybe a vet will stumble along here and enlighten us.

也许一个兽医会在这里蹒跚而行，启发我们。

#1