Could not load type 'Wkhtmltopdf.NetCore.HtmlAsPdf'

Question

Could not load type 'Wkhtmltopdf.NetCore.HtmlAsPdf'

Closed this issue 4 years ago · 20 comments

After install Wkhtmltopdf.NetCore version 3.0.2 to using an project that depend of Wkhtmltopdf.NetCore version 1.1.3 the error happens below.

An exception of type 'System.TypeLoadException' occurred in BankSlip.Api.dll but was not handled in user code: 'Could not load type 'Wkhtmltopdf.NetCore.HtmlAsPdf' from assembly 'Wkhtmltopdf.NetCore, Version=3.0.1.0, Culture=neutral, PublicKeyToken=null'

Answer 1 · 2020-09-13T01:49:18.000Z

Hi! @jlfjunior yeah, that class do not exist anymore.

Since version 2.0 now works like a service, so you have to inject it, you could take a look at the example project https://github.com/fpanaccia/Wkhtmltopdf.NetCore.Example

TL;DR

In the startup.cs you have to remove this -> Wkhtmltopdf.NetCore.RotativaConfiguration.Setup();
And add this -> services.AddWkhtmltopdf();

Then in the controller/service that you are using the HtmlAsPdf, you have to inject this interface IGeneratePdf like this
readonly IGeneratePdf _generatePdf; public TestViewsController(IGeneratePdf generatePdf) { _generatePdf = generatePdf; }

Then where the HtmlAsPdf is used, you could replace it like this
old version -> var builder = new HtmlAsPdf(); var pdf = builder.GetPDF(html);
new version -> var pdf = _generatePdf.GetPDF(html);

Let me know if this helps you

Answer 2 · 2020-09-13T02:37:52.000Z

after the changes other error is presented:

An exception of type 'System.Exception' occurred in Wkhtmltopdf.NetCore.dll but was not handled in user code
at Wkhtmltopdf.NetCore.WkhtmlDriver.Convert(String wkhtmlPath, String switches, String html)
at Wkhtmltopdf.NetCore.GeneratePdf.GetPDF(String html)

        var html = BankSlip.MontaHtmlEmbedded();
        var pdf = _generatePdf.GetPDF(html);

        return pdf;

Answer 3 · 2020-09-13T03:00:31.000Z

could you post the full stack trace?

Answer 4 · 2020-09-13T03:08:16.000Z

Yes, follows informations below.

Exception has occurred: CLR/System.Exception
An exception of type 'System.Exception' occurred in Wkhtmltopdf.NetCore.dll but was not handled in user code
at Wkhtmltopdf.NetCore.WkhtmlDriver.Convert(String wkhtmlPath, String switches, String html)
at Wkhtmltopdf.NetCore.GeneratePdf.GetPDF(String html)
at BankSlip.Api.Models.Services.BankSlipService.GeneratePdf(IEnumerable`1 bankSlips, Boolean paymentBooklet) in C:\Users\junior\Documents\PagCerto\BankSlip\src\BankSlip.Api\Models\Services\BankSlipService.cs:line 28
at BankSlip.Api.Controllers.PrintController.GeneratePdf(BankSlipPdfModel model) in C:\Users\junior\Documents\PagCerto\BankSlip\src\BankSlip.Api\Controllers\PrintController.cs:line 26
at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()

Answer 5 · 2020-09-13T03:16:07.000Z

As an clean example, i just did this example project, it does not have the binaries of rotativa because of size restriction in the comments.
WebApplication1.zip

Answer 6 · 2020-09-13T03:19:32.000Z

hmm it seems like a problem with the HTML....how were you using it before? the HTML, is a razor view or a "hardcoded" HTML?

Answer 7 · 2020-09-13T03:23:07.000Z

I'm using "hardcode" html. when executing the project WebApplication, the same error happens:

Exception has occurred: CLR/System.Exception
An exception of type 'System.Exception' occurred in Wkhtmltopdf.NetCore.dll but was not handled in user code
at Wkhtmltopdf.NetCore.WkhtmlDriver.Convert(String wkhtmlPath, String switches, String html)
at Wkhtmltopdf.NetCore.GeneratePdf.GetPDF(String html)
at WebApplication1.Controllers.TestController.Get() in C:\Users\junior\Downloads\WebApplication1\Controllers\TestController.cs:line 37
at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()

Answer 8 · 2020-09-13T03:32:16.000Z

Have you added the binaries of rotativa, like this?

What version of net core are you running?

Answer 9 · 2020-09-13T03:34:46.000Z

Using the same project + the binaries i am running it fine

Answer 10 · 2020-09-13T03:35:59.000Z

Yes, I'm using dotnet core 3.1.

Answer 11 · 2020-09-13T03:38:14.000Z

are you using omnisharp? i will try it in vscode

Answer 12 · 2020-09-13T03:40:31.000Z

I'm using vscode with omnisharp, I thank you.

Answer 13 · 2020-09-13T03:42:02.000Z

This is my launch.json

{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": ".NET Core Launch (web)",
"type": "coreclr",
"request": "launch",
"preLaunchTask": "build",
"program": "${workspaceFolder}/bin/Debug/netcoreapp3.1/WebApplication1.dll",
"args": [],
"cwd": "${workspaceFolder}",
"stopAtEntry": false,
"serverReadyAction": {
"action": "openExternally",
"pattern": "\bNow listening on:\s+(https?://\S+)"
},
"env": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"sourceFileMap": {
"/Views": "${workspaceFolder}/Views"
}
},
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
]
}

Answer 14 · 2020-09-13T03:43:53.000Z

i will download the version 3.1.7 of net core and try again

Answer 15 · 2020-09-13T03:46:59.000Z

When using your launch.json the same problem occur.

PS C:\Users\junior\Downloads\WebApplication1> dotnet --info
.NET Core SDK (reflecting any global.json):
Version: 3.1.401
Commit: 39d17847db

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19041
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.401\

Host (useful for support):
Version: 3.1.7
Commit: fcfdef8d6b

.NET Core SDKs installed:
2.2.207 [C:\Program Files\dotnet\sdk]
3.1.401 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

Answer 16 · 2020-09-13T03:52:49.000Z

my dotnet info, looks like this now

.NET Core SDK (reflecting any global.json):
Version: 3.1.401
Commit: 39d17847db

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19041
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.401\

Host (useful for support):
Version: 3.1.7
Commit: fcfdef8d6b

.NET Core SDKs installed:
3.1.100 [C:\Program Files\dotnet\sdk]
3.1.302 [C:\Program Files\dotnet\sdk]
3.1.400-preview-015151 [C:\Program Files\dotnet\sdk]
3.1.401 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.16 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.8 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

But still is working fine

maybe is the SDK 2.2.207....im gonna try and install it

Answer 17 · 2020-09-13T04:02:20.000Z

Even with the SDK 2.2.207 is working, i even tried running it from console...i will try to remove the others SDKs

Answer 18 · 2020-09-13T04:44:07.000Z

I deleted all SDKs and runtimes, and still i am unable to reproduce it

Also, this is the version of the c# extension of vscode

if you run with "dotnet run" you have the same problem?

Answer 19 · 2020-09-13T15:01:57.000Z

After installing the Visual Studio Community 2019, the problem resolved.
Is there any relationship?

Answer 20 · 2020-09-13T19:48:57.000Z

When you install visual studio it install a dotnet sdk (if you choose the .net core option).

Maybe there was something wrong with your sdk, you can see that now you are running the 3.1.8 version, maybe there was an issue with your installation.