YouTube C# API V3, how do you resume an interrupted upload?

Question

I can\'t work out how to resume an interrupted upload in V3 of the C# YouTube API.

My existing code uses V1 and works fine but I\'m switching to V3.

If I cal

Answer 1

I've managed to get this to work using reflection and avoided the need to modify the API at all. For completeness, I'll document the process but it isn't recommended. Setting private properties in the resumable upload object is not a great idea.

When your resumeable upload object has been destroyed after an application restart or reboot, you can still resume an upload using version "1.8.0.960-rc" of the Google.Apis.YouTube.v3 Client Library.

private static void SetPrivateProperty(Object obj, string propertyName, object value)
{
    var propertyInfo = typeof(T).GetProperty(propertyName, BindingFlags.NonPublic | BindingFlags.Instance);
    if (propertyInfo == null) return;
    propertyInfo.SetValue(obj, value, null);
}

private static object GetPrivateProperty(Object obj, string propertyName)
{
    if (obj == null) return null;
    var propertyInfo = typeof(T).GetProperty(propertyName, BindingFlags.NonPublic | BindingFlags.Instance);
    return propertyInfo == null ? null : propertyInfo.GetValue(obj, null);
}

You need to save the UploadUri during the ProgressChanged event.

Upload.ResumeUri = GetPrivateProperty>(InsertMediaUpload, "UploadUri") as Uri;

You need to set the UploadUri and StreamLength before calling ResumeAsync.

private const long UnknownSize = -1;
SetPrivateProperty>(InsertMediaUpload, "UploadUri", Upload.ResumeUri);
SetPrivateProperty>(InsertMediaUpload, "StreamLength", fileStream.CanSeek ? fileStream.Length : Constants.UnknownSize);
Task = InsertMediaUpload.ResumeAsync(CancellationTokenSource.Token);