Unhandled Exception: System.Runtime.InteropServices.SEHExcep

[a1dharm]

Hi All,

We are trying to adding a feature for file uploading in our project when uploading upto 15MB it works but when more than 20 MB, then getting below error. But once attached the file try to sending the file to server then we are getting error. we are using Cefsharp version 96.

Unhandled Exception: System.Runtime.InteropServices.SEHException: External component has thrown an exception.
at CefSharp.Internals.Serialization.DeserializeObject<class CefListValue,unsigned int>(scoped_refptr<CefListValue>* list, UInt32 index, IJavascriptCallbackFactory javascriptCallbackFactory) in C:\projects\cefsharp\CefSharp.Core.Runtime\Internals\Serialization\ObjectsSerialization.cpp:line 52
at CefSharp.Internals.Serialization.DeserializeObject<class CefListValue,int>(scoped_refptr<CefListValue>* list, Int32 index, IJavascriptCallbackFactory javascriptCallbackFactory) in C:\projects\cefsharp\CefSharp.Core.Runtime\Internals\Serialization\ObjectsSerialization.cpp:line 60
at CefSharp.Internals.ClientAdapter.OnProcessMessageReceived(ClientAdapter* , scoped_refptr<CefBrowser>* browser, scoped_refptr<CefFrame>* frame, cef_process_id_t source_process, scoped_refptr<CefProcessMessage>* message) in C:\projects\cefsharp\CefSharp.Core.Runtime\Internals\ClientAdapter.cpp:line 1441

regards
Dharm

[amaitland]

How do you reproduce the problem exactly?

If you are trying to send binary blobs then you'll need to base64 encode them.

[a1dharm]

yes we are using base64 encoder.

[amaitland]

How do you reproduce the problem? How big is the file?

It might be too big for the CLR

[a1dharm]

sorry for delay response.
Up to 15 MB there is noissue,it works. but above 20 MB we got CLR error. The issue is coming while uploading the file. When debug mode the error on
Object^ DeserializeObject

[amaitland]

It's probably too big. Not meant for sending large chunks of data.

Using a ResourceHandler with a post request should handle very large files.