PictureBox can not display image when hosting on linux

[sky]

 

Request URL:
http://localhost:5011/api/reports/clients/a424ed34405/parameters

Response error:

{
    "message": "An error has occurred.",
    "exceptionMessage": "Invalid report type",
    "exceptionType": "System.ArgumentException",
    "stackTrace": "   at Telerik.Reporting.Processing.TypeReportDocumentResolver.Resolve(IProcessingContext context, TypeReportSource rs)\n   
at Telerik.Reporting.Processing.ReportDocumentResolver`1.Telerik.Reporting.Processing.IReportDocumentResolver.Resolve(IProcessingContext context, ReportSource rs)\n   
at Telerik.Reporting.Processing.ReportDocumentResolver.<>c__DisplayClass0_0.<Resolve>b__0(IReportDocumentResolver r)\n   
at Telerik.Reporting.Processing.ReportDocumentResolver.Bind[T](IProcessingContext context, ReportSource source, Func`2 func)\n   
at Telerik.Reporting.Processing.ReportDocumentResolver.Resolve(IProcessingContext context, ReportSource source)\n   
at Telerik.Reporting.Processing.ResolvedReportDocument.ResolveReportsRecursively(ReportSource rs, IProcessingContext context, IDictionary`2 parentRsParameters, Boolean parentShouldDispose, List`1 result, IReportDocument& definition, ResolvedReport& tocReport, ReportBookTocPosition& tocReportPosition)\n   
at Telerik.Reporting.Processing.ResolvedReportDocument.Create(ReportSource rs, IProcessingContext context)\n   
at Telerik.Reporting.Processing.DocumentParametersManager`1..ctor(ReportSource definition, IProcessingContext processingContext, IParameterValueParser parameterValueParser)\n   
at Telerik.Reporting.Processing.DocumentParametersManager..ctor(ReportSource rs, IProcessingContext processingContext, IParameterValueParser parameterValueParser)\n   
at Telerik.Reporting.Services.Engine.ReportEngine.GetParameters(String clientID, String report, Dictionary`2 parameterValues)\n   
at Telerik.Reporting.Services.AspNetCore.ReportsControllerBase.GetParameters(String clientID, ClientReportSource reportSource)\n   
at lambda_method(Closure , Object , Object[] )\n   
at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeActionMethodAsync()\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()\n--- End of stack trace from previous location where exception was thrown ---\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()\n--- End of stack trace from previous location where exception was thrown ---\n   
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)"
}

[sky]

PictureBox display correct when app hosting on windows 10, but hosting on Linux or docker, throw exception.

AllowSynchronousIO value already has been set to true.

Program.cs

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseKestrel(options =>
                    {
                        options.AllowSynchronousIO = true;
                    });

                    webBuilder.UseStartup<Startup>();
                });

 

Startup.cs

            services.Configure<KestrelServerOptions>(options =>
            {
                options.AllowSynchronousIO = true;
            });

[sky]

The picture Settings are shown in the attachment.

[Mads]

Hi,

I am sorry to hear you are having issues.

Based on the Request-URL you sent I believe you are using one of the HTML5 based viewers with Report REST Service. And because you have Startup.cs and Program.cs I believe you are using .NET Core. In the posted stack-trace, GetParameters is called which is the first call from the Viewer to the REST Service which actually resolves the report. And in this first attempt at resolving the report, the exception is thrown. 

In the title of this thread, you mention the issue is the PictureBox is not being displayed on Linux, while the error is saying it's struggling to resolve the report. Can I ask what makes you sure that the PictureBox is the cause? Does it work with Reports that do not have pictures?

The Reporting engine relies on the GDI+ API which is available on the Windows OS. On Linux our codebase relies on a GDI+ replacement called libgdiplus. It doesn't provide the same functionality and in some cases, the rendering it provides is different than the rendering on Windows. I believe this could be a cause of the issue, as this library is being used for certain things when the report is being resolved. You can check the small snippet here that shows how to add it to your dockerfile.

Unfortunately, the available information is not sufficient to locate the exact problem. I suggest attaching a Trace Listener to the application that runs on Linux. Our code should log more details about the problem and hopefully let us diagnose the issue.

Regards, Mads Progress Telerik

[sky]

thanks！

when i ues expression binding for PictureBox value, the problem was resolved.

Value = "./resources/reportheader.png"