URL Encode and Decode in ASP.NET Core

Question

HttpContext.Current.Server.UrlEncode

It\'s only work in .NET Framework. How can I encode or decode uri arguments in ASP.NET Core project?

Answer 1

• For ASP.NET Core 2.0+ just add System.Net namespace - WebUtility class is shipped as part of System.Runtime.Extensions nuget package, that is referenced by default in ASP.NET Core project.

• For the previous version add Microsoft.AspNetCore.WebUtilities nuget package.

Then the WebUtility class will be available for you:

public static class WebUtility
{
    public static string UrlDecode(string encodedValue);
    public static string UrlEncode(string value);
}

Answer 2

For ASP.Net Core 2.0+ and if you need spaces to be encoded as %20

as opposed to +;

Use:

 Uri.EscapeDataString(someString);

Answer 3

Don't waste your time, I've got plenty of experience with these so called url encoders, they are all useless, and have different quirks. Eg WebUtility.UrlEncode doesn't take care of "+" sign.

If you want to encode URL parameters, employ a BASE58 encoding. It uses only alphabet letters + numbers, thus you don't need to url encode.

Answer 4

I'm using a redirect, and UrlEncode did not work for me because it encodes the entire url. I solved this by instead using UriHelper.Encode, shown below.

UriHelper.Encode

// generate url string...
return Redirect(Microsoft.AspNetCore.Http.Extensions.UriHelper.Encode(new System.Uri(url)));

Answer 5

It's available on version 2.0.0 of the .Net Core SDK, in System.Net.WebUtility.UrlEncode (see documentation)