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asp.net-corepdf-generationrotativa

Using Rotativa to export HTML into PDF file in ASP.NET Core MVC 7

I am using ASP.NET Core MVC 7 and I want to use Rotativa package to export HTML (i.e. Razor View) into PDF file.

I install the required package using the package manager console: Install-Package Rotativa.AspNetCore -Version 1.2.0

then I using the following Action code:

public IActionResult SavePDF()
{
            return new ViewAsPdf("PDF")
            {
                FileName = "MyPdfFile.pdf"
            };
}

where PDF is the Razor View name and MyPdfFile.pdf is the PDF file name but, I have the following error on the run time

System.ArgumentNullException: Value cannot be null. (Parameter 'path1')
   at System.ArgumentNullException.Throw(String paramName)
   at System.IO.Path.Combine(String path1, String path2)
   at Rotativa.AspNetCore.WkhtmlDriver.Convert(String wkhtmlPath, String switches, String html, String wkhtmlExe)
   at Rotativa.AspNetCore.WkhtmltopdfDriver.ConvertHtml(String wkhtmltopdfPath, String switches, String html)
   at Rotativa.AspNetCore.ViewAsPdf.CallTheDriver(ActionContext context)
   at Rotativa.AspNetCore.AsResultBase.BuildFile(ActionContext context)
   at Rotativa.AspNetCore.AsResultBase.ExecuteResultAsync(ActionContext context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResultFilterAsync>g__Awaited|30_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeFilterPipelineAsync()
--- End of stack trace from previous location ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

Any suggestions please, thank you

I have tried to use Rotativa package (Rotativa.AspNetCore) to generate PDF file from the Razor View (HTML) while I am using ASP.NET Core MVC , and it does not work with An unhandled exception occurred while processing the request.

Solution

  • 1.Be sure add the following code in Program.cs:

    RotativaConfiguration.Setup(builder.Environment.WebRootPath, "Rotativa");

    2.Be sure your project contains wkhtmltoimage.exe and wkhtmltopdf.exe files which exist in the following location:

    enter image description here

    If not, you could download from github:https://github.com/webgio/Rotativa.AspNetCore. They located in Rotativa.AspNetCore/Rotativa.AspNetCore.Demo/wwwroot/Rotativa/. Then put the two files to your project.