System.ObjectDisposedException：“无法访问封闭的流。”在iformfile.copyto

Question

我有一个情况，我需要从图像创建FormFile，然后我需要从FormFile的Back MemoryStream。文件中的存储器在其他地方。我刚刚将其作为样本来解决这个问题。

private IFormFile ReturnFormFile(Image image, string thumbnailName)
    {
        IFormFile file = null;
        using (MemoryStream ms = new MemoryStream())
        {
            image.Save(ms, ImageFormat.Jpeg);
            file = new FormFile(ms, 0, ms.Length, "name", thumbnailName);
            ms.Seek(0, SeekOrigin.Begin);
        }
        using (System.IO.MemoryStream memStream = new System.IO.MemoryStream())
        {
            file.CopyTo(memStream);// System.ObjectDisposedException: 'Cannot access a closed Stream.'

            Byte[] fileData = memStream.ToArray();
        }
        return file;
    }

请提出任何建议
    

以这种方式：

Answer 1

private IFormFile ReturnFormFile(Image image, string thumbnailName)
    {
        IFormFile file = null;
        using (MemoryStream ms = new MemoryStream())
        {
            image.Save(ms, ImageFormat.Jpeg);
            file = new FormFile(ms, 0, ms.Length, "name", thumbnailName);
            ms.Seek(0, SeekOrigin.Begin);
            using (System.IO.MemoryStream memStream = new System.IO.MemoryStream())
            {
                file.CopyTo(memStream);// System.ObjectDisposedException: 'Cannot access a closed Stream.'

                Byte[] fileData = memStream.ToArray();
            }
            return file;
        }
       
    }

一种简单的方法正在删除

Answer 2

// change bellow code 
// using (MemoryStream ms = new MemoryStream()){} 
// to
MemoryStream ms = new MemoryStream();