URL encode in C#

Question

I'm having trouble finding the correct way to URL encode a string in C#. What I want is to encode the string some string to some%20code. Using HttpUtility.URLEncode(); method encode is to some+string.

So what is the problem? you should use HttpUtility.URLEncode — eyossi
– eyossi, Commented May 28, 2012 at 12:11
So, is there something wrong with string.Replace("+", "%20")? — user555045
– user555045, Commented May 28, 2012 at 12:14

Community · Accepted Answer · 2017-05-23 12:24:23Z

8

HttpUtility.UrlEncode does the right thing here.

Encodes a URL string. The UrlEncode method can be used to encode the entire URL, including query-string values.

When it comes to spaces on the URL, a + or %20 are both correct.

Also see URL encoding the space character: + or %20?.

edited May 23, 2017 at 12:24

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answered May 28, 2012 at 12:12

Oded

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2 Comments

Gregor Menih Over a year ago

The problem was that I was sending a HTTP request to get the web page, where '+' was not valid. Eg. Sending a query with 'some+string' would search for 'some+string', not 'some string'.

Peter Mortensen Over a year ago

What is the minimum required .NET version for HttpUtility.UrlEncode() (not necessarily what is listed in the MSDN page)?

Guffa · Accepted Answer · 2012-05-28 12:13:09Z

If you want spaces encoded as %20 instead of +, you have to do the encoding yourself.

In URL encoding a + means space. You can also use %20, just as you can use the character code variant for any character, but the built in encoding uses the shorter variant.

Community · Accepted Answer · 2017-05-23 12:24:23Z

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