Reputation: 8187

How do I replace all the spaces with %20 in C#?

I want to make a string into a URL using C#. There must be something in the .NET framework that should help, right?

Upvotes: 91

Answers (11)

Dirk Vollmar

Reputation: 176159

Another way of doing this is using Uri.EscapeDataString(stringToEscape)

Upvotes: 130

mortenma71

Reputation: 1286

HttpUtility.UrlDecode works for me:

var str = "name=John%20Doe";
var str2 = HttpUtility.UrlDecode(str);

str2 = "name=John Doe"

Upvotes: -1

Darrel K.

Reputation: 1729

As commented on the approved story, the HttpServerUtility.UrlEncode method replaces spaces with + instead of %20. Use one of these two methods instead: Uri.EscapeUriString() or Uri.EscapeDataString()

Sample code:

HttpUtility.UrlEncode("https://mywebsite.com/api/get me this file.jpg")
//Output: "https%3a%2f%2fmywebsite.com%2fapi%2fget+me+this+file.jpg"

Uri.EscapeUriString("https://mywebsite.com/api/get me this file.jpg");
//Output: "https://mywebsite.com/api/get%20me%20this%20file.jpg"
Uri.EscapeDataString("https://mywebsite.com/api/get me this file.jpg");
//Output: "https%3A%2F%2Fmywebsite.com%2Fapi%2Fget%20me%20this%20file.jpg"

//When your url has a query string:
Uri.EscapeUriString("https://mywebsite.com/api/get?id=123&name=get me this file.jpg");
//Output: "https://mywebsite.com/api/get?id=123&name=get%20me%20this%20file.jpg"
Uri.EscapeDataString("https://mywebsite.com/api/get?id=123&name=get me this file.jpg");    
//Output: "https%3A%2F%2Fmywebsite.com%2Fapi%2Fget%3Fid%3D123%26name%3Dget%20me%20this%20file.jpg"

Upvotes: 19

Hitesh Jain

Reputation: 21

The below code will replace repeating space with a single %20 character.

Example:

Input is:

Code by Hitesh             Jain

Output:

Code%20by%20Hitesh%20Jain

Code

static void Main(string[] args)
{
    Console.WriteLine("Enter a string");
    string str = Console.ReadLine();
    string replacedStr = null;

    // This loop will repalce all repeat black space in single space
    for (int i = 0; i < str.Length - 1; i++)
    {
        if (!(Convert.ToString(str[i]) == " " &&
            Convert.ToString(str[i + 1]) == " "))
        {
            replacedStr = replacedStr + str[i];
        }
    }
    replacedStr = replacedStr + str[str.Length-1]; // Append last character
    replacedStr = replacedStr.Replace(" ", "%20");
    Console.WriteLine(replacedStr);
    Console.ReadLine();
}

Upvotes: -2

George Mauer

Reputation: 122042

HttpServerUtility.HtmlEncode

From the documentation:

String TestString = "This is a <Test String>.";
String EncodedString = Server.HtmlEncode(TestString);

But this actually encodes HTML, not URLs. Instead use UrlEncode(TestString).

Upvotes: -4

nothingisnecessary

Reputation: 6224

I needed to do this too, found this question from years ago but question title and text don't quite match up, and using Uri.EscapeDataString or UrlEncode (don't use that one please!) doesn't usually make sense unless we are talking about passing URLs as parameters to other URLs.

(For example, passing a callback URL when doing open ID authentication, Azure AD, etc.)

Hoping this is more pragmatic answer to the question: I want to make a string into a URL using C#, there must be something in the .NET framework that should help, right?

Yes - two functions are helpful for making URL strings in C#

String.Format for formatting the URL
Uri.EscapeDataString for escaping any parameters in the URL

This code

String.Format("https://site/app/?q={0}&redirectUrl={1}", 
  Uri.EscapeDataString("search for cats"), 
  Uri.EscapeDataString("https://mysite/myapp/?state=from idp"))

produces this result

https://site/app/?q=search%20for%20cats&redirectUrl=https%3A%2F%2Fmysite%2Fmyapp

Which can be safely copied and pasted into a browser's address bar, or the src attribute of a HTML A tag, or used with curl, or encoded into a QR code, etc.

Upvotes: 3

LiraNuna

Reputation: 67232

I believe you're looking for HttpServerUtility.UrlEncode.

System.Web.HttpUtility.UrlEncode(string url)

Upvotes: 58

palswim

Reputation: 12140

To properly escape spaces as well as the rest of the special characters, use System.Uri.EscapeDataString(string stringToEscape).

Upvotes: 27

Gilda

Reputation: 519

I found useful System.Web.HttpUtility.UrlPathEncode(string str);

It replaces spaces with %20 and not with +.

Upvotes: 51

Jacob

Reputation: 34601

HttpUtility.UrlEncode Method (String)

Upvotes: -2

Thomas Levesque

Reputation: 292355

Use HttpServerUtility.UrlEncode

Upvotes: 1

How do I replace all the spaces with %20 in C#?

Answers (11)

Code

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