C# HTMLDecode without System.Web possible?

问题:

I know there are different methods in the System.Web namespace for decoding html entities (such as "%20" for space). I'm building a Winforms application however, but needs to deal with html encoded strings. Basically I have the iTunes Library XML file and need to decode the URLs in there to check the files.

Is this possible without the System.Web namespace?

回答1:

Developers who need to use System.Web.HttpUtility in their client apps and had to reference System.Web.dll and therefore target NET4 full (System.Web.dll is in Full) , can now target the NET4 Client Profile by using the new System.Net.WebUtility class which is in System.dll (System.dll is in NET4 Client Profile). System.Net.WebUtility includes HtmlEncode and HtmlDecode. Url encoding can be accomplished using the System.Uri class (also in System.dll).

From http://blogs.msdn.com/b/jgoldb/archive/2010/04/12/what-s-new-in-net-framework-4-client-profile-rtm.aspx

回答2:

You can use System.Net.WebUtility.HtmlDecode:

Converts a string that has been HTML-encoded for HTTP transmission into a decoded string.

回答3:

Just because you're writing a Windows Forms app doesn't stop you from using System.Web. Just add a reference to System.Web.dll.

回答4:

See this article if you're still curious how to do this without System.Web. It offers a solution for URI decoding (which is really what you're decoding, not HTML entities which are something like "&emdash;" )

回答5:

To use the methods that are in the .NET framework you must use the System.Web namespace to get the HtmlDecode method.

Yes, you could write your own method to do it, but that wouldn't make a lot of sense.

Just add the reference to system.web.

回答6:

mybe it can help in winforms :

System.Uri.EscapeUriString(plainText);

回答7:

You can use HttpUtility.UrlDecode or HttpUtility.HtmlDecode