The name 'HttpUtility' does not exist in the current context.

I am getting this error when I opened a github repository in unity.When I searched stackoverflow I got the feedback to use

Code (CSharp):

1.  using System.Web;

Even after using that it still shows error.In C# projects it might be useful how to use it in Unity.

Code (CSharp):

1. var queryString = HttpUtility.ParseQueryString(string.Empty); //Showing error "The name 'HttpUtility' does not exist in the current context"

 

Can you show all of your code?

 

It was inside the below code

Code (CSharp):

1. public static IEnumerator MakeHandwritingRequest(byte[] bytes, Text textComponent)
2.     {
3.         var headers = new Dictionary<string, string>() {
4.              {"Ocp-Apim-Subscription-Key", VISION_API_SUBSCRIPTION_KEY },
5.              {"Content-Type","application/octet-stream"}
6.         };
7.         var queryString = HttpUtility.ParseQueryString(string.Empty);
8.         queryString["mode"] = "Printed";
9.         string uri = VISION_API_BASE_URL + "/vision/v1.0/recognizeText?" + queryString;
10.         if ((bytes != null) && (bytes.Length > 0))
11.         {
12.             WWW www = new WWW(uri, bytes, headers);
13.             yield return www;
14.  
15.             if (www.error != null)
16.             {
17.                 textComponent.text = "Error 1: " + www.error;
18.             }
19.             else
20.             {
21.  
22.                 string operationLocation = www.responseHeaders["Operation-Location"];
23.                 var headers2 = new Dictionary<string, string>() {
24.                      {"Ocp-Apim-Subscription-Key", VISION_API_SUBSCRIPTION_KEY }
25.                 };
26.                 string statusRunning = "{\"status\":\"Running\"}";
27.                 string status = "{\"status\":\"Running\"}";
28.                 do
29.                 {
30.                     System.Threading.Thread.Sleep(500);
31.                     WWW www2 = new WWW(operationLocation, null, headers2);
32.                     yield return www2;
33.  
34.                     if (www2.error != null)
35.                     {
36.                         textComponent.text = "Error 2: " + www.error;
37.                     }
38.                     else
39.                     {
40.                         status = www2.text;
41.                         textComponent.text = "Processing...";
42.                     }
43.                 } while (status == statusRunning);
44.                 HandwritingAPIResults results = JsonUtility.FromJson<HandwritingAPIResults>(status);
45.                 status = results.ToString();
46.                 textComponent.text = status;
47.                 print(status);
48.  
49.             }
50.         }
51.     }

 

Which .Net version do you use?

 

.net 4

 

Very weird. I didn't meet this error. I have added

using System.Web;

 

https://github.com/Arhisan/unity-azure-text-recognition
This project I opened in unity

 

Well, I have cloned your project and built it, but I didn't meet any problem.

 

is it supported inn MacOS? may be because of that?

 

This is my configuration, and I am using Unity 2019.1.

 

I am using 2019.2

 

Maybe you can try to use a lower version.

 

I have faced with the same issue. Have you resolved it? @zyonneo

 

You can configure Unity to reference additional assemblies here: https://docs.unity3d.com/Manual/dotnetProfileAssemblies.html

In your case, you can create the file

csc.rsp

into your Assets folder and put the content below.

Code (CSharp):

1. -r:System.Web.dll

 

@zyonneo, @bekici Did you resolve this issue?

 

In my case changing the API Compatibility Level From .NET 4.x to .NET Standard 2.0 fixed the problem.

 

I'm already using .NET Standard 2.0 but no fixes. Still using Unity 2019.1.14f to avoid the problem.

 

thanks. this works for me.

 

okay but how do I add this csc.rsp file to my assets folder. do I simply create a txt file in notepad called csc.rsp, paste the 1 line of code and then drag and drop it into my assets folder?

 

That's the first thing I would try. No idea if that's what he meant, but it's free to try!

 

that didn't work so I guess im dumb

 

I lied I guess it does work

 

I am facing this as well, trying to migrate from 2018.4 --> 2019.4. Is this a bug ? is it planned to be fixed?

 

It seems like a feature - you can add the libraries you need like described in here above and in the docs at https://docs.unity3d.com/Manual/dot...5.2108058825.1597740329-1791289007.1508351871

I got this with HttpUtility.ParseQueryString and added csp.rsp with -r:System.Web.dll

 

thanks a lot. it works

 

I had same issue on 2018 - 2019 upgrade, though System.Net [WebUtility] has some similar functions to use instead like maybe WebUtility.HtmlDecode instead of HttpUtility.HtmlDecode

 

To me it seems to be a total waste to include System.Web.dll just for dealing with URL encoding. Especially in the case of the OP. Using this:

Code (CSharp):

1. var queryString = HttpUtility.ParseQueryString(string.Empty);
2. queryString["mode"] = "Printed";
3. string uri = VISION_API_BASE_URL + "/vision/v1.0/recognizeText?" + queryString;

just do do this:

Code (CSharp):

1. string uri = VISION_API_BASE_URL + "/vision/v1.0/recognizeText?mode=Printed";

seems to just adds unnecessary complexity. I do understand that a proper url encoder might be useful when you're dealing with user provided text so special characters gets escaped properly. However in this case I really don't get it.

 

Fair enough - I'm not using it for URL encoding, but for parsing query params.

 

I'm running into this problem as well. Works fine on macOS where I originally wrote the code. However when trying to build on Windows I get the "not found" error. Tried both .NET 4.x and .NET Standard 2.0

ETA: OK, I got finally it working with the csc.rsp solution. It didn't initially re-read the file.

ETA (again): I take it back. Although the project builds and runs in the Editor, when I try to build a UWP all, it fails to find the HttpUtility class.

 

Thanks!