Plus sign in query parameter becomes empty string (ASP.NET Core)

Question

In my application I want to add sorting like that: 'https://example.com/entity?sort_by=+property'.

When I try to pass plus sign to query, ASP.NET Core returns 'property' without plus sign. How can I fix this?

Unless you intend for + to mean " ", then you should encode your string. — ProgrammingLlama
– ProgrammingLlama, Commented Sep 14, 2019 at 11:05

meefer · Accepted Answer · 2025-01-31 18:36:12Z

5

The plus symbol is a reserved character according to RFC3986 which is the standard specification for URIs and it is used to represent a space, therefore, if you want to use it in your URL as literally the "+" character instead of a space, you need to encode it so it looks like:

https://example.com/entity?sort_by=%2Bproperty

In ASP.NET Core you can encode / decode URL's as follows:

using System.Net;

string url = "https://example.com/entity?sort_by=+property";

string encodedUrl = WebUtility.UrlEncode(url);
string decodedUrl = WebUtility.UrlDecode(encodedUrl);

See here for more info about URL encoding.

edited Jan 31 at 18:36

meefer

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answered Sep 14, 2019 at 11:39

Isma

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Comments

kingkeamo · Accepted Answer · 2021-03-29 19:06:33Z

1

We ran into encoding issues with plus signs in url parameters and the fix for us was to use the following.

Uri.EscapeDataString(urlParameter);
Uri.UnescapeDataString(escapedUrlParameter);

Wanted to share this in case anyone else runs into the same issue.

answered Mar 29, 2021 at 19:06

kingkeamo

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