Error transferring byte array data from C # to JavaScript

[qwertzou]

Is there an existing issue for this?

• I have searched both open/closed issues, no issue already exists.

CefSharp Version

135.0.170

Operating System

Windows 10

Architecture

x64

.Net Version

net472

Implementation

WinForms

Reproduction Steps

Reference example: CefSharp/CefSharp.Test/Javascript/EvaluateScriptAsyncTests.cs -> CanEvaluateScriptAsyncReturnArrayBuffer
Can only receive ArrayBuffer data returned by Javascript, cannot transfer byte array data to Javascript

Expected behavior

C#:
byte[] bytes = Encoding.UTF8.GetBytes(str); var javascriptResponse = await browser.EvaluateScriptAsync($"putByte({bytes})"); if (javascriptResponse.Success) { var actualBytes = (byte[])javascriptResponse.Result; string newstr = Encoding.UTF8.GetString(actualBytes); Debug.WriteLine(newstr); }

Javascript:
<script> function putByte(pData) { console.log(pData); return pData; } </script>

Actual behavior

error message: Uncaught SyntaxError: Unexpected token ']'\n@ about:blank:1:20"

Regression?

No response

Known Workarounds

No response

Does this problem also occur in the CEF Sample Application

Yes using WinForms command line args

Other information

No response

[qwertzou]

How to use this ArrayBuffer 4632

[amaitland]

Can only receive ArrayBuffer data returned by Javascript, cannot transfer byte array data to Javascript

Correct. It only supports javascript as a string. The other overloads are just for generating a string.

What you are seeing is expected.

There's an open issue to add support #4358