System.ObjectDisposedException: 'Cannot access a disposed object. ObjectDisposed_ObjectName_Name', al momento de guardar mi lista de imagenes

Question

My View in vue.js sends me the image arrangement to my api, which I want to save in a folder asynchronously and when I do the second round in my foreach to the second image it gives me the error.

foreach (var imagen in imagenes)
{
    ImagenesProducto imagenesProducto = new ImagenesProducto();

 using (var stream = new FileStream(concFile, FileMode.Create))
 {
     await imagen.CopyToAsync(stream);
 }
}

Answer 1

I think we're missing some information here to be helpful. It looks like you have a list of streams(?) in imagenes. You enumerate through and for each one you are creating an instance of ImagenesProducto but that doesn't seem to be used elsewhere so we'll ignore it. You then create a new file using a stream and copy the current item (stream?) into it. By itself this code is fine so I think something else is going on here.

Look at the callstack and tell us what specifically is getting disposed too early. My gut instinct is that it is your imagen variable which means whatever is passing you that set of items might be bad.

Step through your code and when you get to the CopyToAsync line look at both objects in the debugger and see which one is marked as disposed.

Answer 2

I assume imagenes is posted by the vue app. Your api code is probably returning a response to the vue.js code before the sample code completes. The api must await the copy before returning. If you don’t want wait for the file copy, the postback image streams must be copied to new buffers before calling the code.