Facing issues using CoreWebView2Environment

Question

Facing issues using CoreWebView2Environment

Jigneshkumar Jani 1

I am trying to create a COM component for creating CoreWebView2. The steps I am following are, 1. CoreWebView2Environment.CreateAsync 2. envObject.CreateCoreWebView2ControllerAsync In step 2, I get an NotImplemented exception with message "Unable to cast to Microsoft.Web.WebView2.Core.Raw.ICoreWebView2Environment. This may happen if you are using an interface not supported by the version of the WebView2 Runtime you are using. For instance, if you are using an experimental interface from an older SDK that has been modified or removed in a newer runtime. Or, if you are using ........" I checked and double checked, Edge Chromium version and WebView2 Runtime version on my machine is same that is "87.0.664.75". Nuget that I am using is Microsoft.Web.WebView2 - Version 1.0.664.37. I checked the versioning concept page for Edge WebView2 (this Nuget version requires minimum WebView2 Runtime version 86.0.616.0) and according to the page I am using correct version of Runtime vs Nuget version. Can someone please help me with this one, Whether my understanding is correct or I am doing something wrong here or this is a genuine bug ? I am working with Windows 10.

Anonymous

2021-01-11T07:33:06.71+00:00

@Jigneshkumar Jani ,
If possible, can you please try to provide the sample code to reproduce the issue on our end? It can help us to test the issue and it can help us better understand this issue.

Thanks for your understanding.

3 answers

Your answer

Anonymous

2021-01-11T07:33:06.71+00:00

@Jigneshkumar Jani ,
If possible, can you please try to provide the sample code to reproduce the issue on our end? It can help us to test the issue and it can help us better understand this issue.

Thanks for your understanding.

Answer 1

Jani, Jigneshkumar 26

@Anonymous ,

I am trying to create WebView2 with following 3 statements in a function.

var webview2Environment = await CoreWebView2Environment.CreateAsync(string.Empty, strUserDataFolder, null);
var webview2Controller = await webview2Environment.CreateCoreWebView2ControllerAsync(ptr);
var webView = webview2Controller.CoreWebView2;

Thanks for the response. The Nuget version and WebView2 Runtime can be referenced from my very first request in this thread.

Anonymous

2021-01-11T09:15:36.583+00:00

@Jigneshkumar Jani ,
Can you please inform us, what values you had passed for the parameters strUserDataFolder and ptr?
I am assuming you are using this code in the Windows Forms app(correct me if I am misunderstanding).

Answer 2

Jani, Jigneshkumar 26

I am doing the same with given nuget version and WebView2 Runtime as mentioned in first message in this thread. After creating the Envrionment when I try creating WebView2Controller, that is when I get the error. The error text is mentioned in the first message as well. The error message is pointing me to verify Nuget Version vs minimum required WebView2 Runtime version. I have the correct combination and yet I get this error all the time. I am not able to create WebView2Controller, CreateAsync on CoreWebView2Environment is the only statement that executes without error.

Anonymous

2021-01-13T07:28:36.323+00:00

@Jigneshkumar Jani ,
You can notice that I am using the same version of webview2 NuGet reference and the same version of webView2 runtime as you.

Can you please visit this link and inform us whether you had download the Evergreen Standalone Installer or Fixed Version? also, let us know for which bitness you had download the webView2 runtime?
I can try to test with that specific setup.

Let me know if there is any difference between your code and my test code. It may help to narrow down the issue.
Jigneshkumar Jani 1 Reputation point

2021-01-18T05:51:46.757+00:00

@Anonymous I am using Evergreen Standalone Installer, I installed x86 as there may be 32 bit programs from where we might need to create CoreWebView2. To be extra sure, I removed Edge Chromium from my Windows 10 machine. I removed the runtime and then installed only WebView2 runtime using Evergreen Standalone Installer for x86. It is still giving the trouble. Though I do get your point and trying to ensure complete cleanup and install of Evergreen version of WebView2 runtime. As of now, I am still having the same exception being thrown in my code.
Anonymous

2021-01-19T07:58:32.263+00:00

@Jigneshkumar Jani ,
I have also made a test with the webView2 runtime Evergreen Standalone Installer x86 and it also works fine.
It can be possible that the issue is machine specific.
If possible for you then can please try to reproduce the same issue on any other machine?

Answer 3

Jani, Jigneshkumar 26

@Anonymous , the strUserDataFolder is directory path and ptr is handle for parent window. yes, trying to use the code in Windows Forms app.

Anonymous

2021-01-12T09:53:21.193+00:00

@Jigneshkumar Jani ,
Do you mean, there is a form that contains webView2 and you are passing the handle of the form as a ptr? If yes, I try to test like that but it did not give me any error.
Please see my test result:

If you think I am misunderstanding something from your description, please correct me and try to provide more information that might help us to reproduce the issue accurately.

Thanks for your understanding.

Share via

Facing issues using CoreWebView2Environment

3 answers

Your answer