New to Telerik Reporting? Download free 30-day trial

Blazor WASM Project Throws System.Drawing.Common Is Not Supported


Product Progress® Telerik® Reporting


When trying to render Telerik reports programmatically with the ReportProcessor in a Blazor WebAssembly (WASM) project the following error gets thrown.

Error Message

Unhandled exception rendering component: System.Drawing.Common is not supported on this platform.
System.PlatformNotSupportedException: System.Drawing.Common is not supported on this platform.
    at System.Drawing.Image..ctor()
    at System.Drawing.Bitmap..ctor(Int32 width, Int32 height)
    at BlazorApp_empty1.Pages.Index.OnButtonClick2() in D:\Program Files\Progress\Telerik Reporting R3 2022\Examples\CSharp\.NET 7\BlazorApp-empty1\Pages\Index.razor:line 32
    at Microsoft.AspNetCore.Components.EventCallbackWorkItem.InvokeAsync[Object](MulticastDelegate delegate, Object arg)
    at Microsoft.AspNetCore.Components.EventCallbackWorkItem.InvokeAsync(Object arg)
    at Microsoft.AspNetCore.Components.ComponentBase.Microsoft.AspNetCore.Components.IHandleEvent.HandleEventAsync(EventCallbackWorkItem callback, Object arg)
    at Microsoft.AspNetCore.Components.EventCallback.InvokeAsync(Object arg)
    at Microsoft.AspNetCore.Components.RenderTree.Renderer.DispatchEventAsync(UInt64 eventHandlerId, EventFieldInfo fieldInfo, EventArgs eventArgs)

Cause\Possible Cause(s)

The problem relates to the fact that Blazor WASM is built on the Mono project:

For that reason Blazor WASM projects don't support the System.Drawing.Common functionality as discussed in the following threads:

Suggested Workarounds

The ReportProcessor or the Reporting REST Service should be hosted in a different project type, for example, Blazor Server, which supports System.Drawing.Common.

The generated reports may be displayed in the Blazor Report Viewer or Native Blazor Report Viewer hosted in a Blazor WebAssembly project.


The problem will be solved when we implement the feature request described in Future of Linux support for reporting.

See Also

In this article