使用C＃将文件（从流）保存到磁盘

问题描述：

可能重复：

如何将流保存到文件？

我有一个流对象，它可能是图像或文件（msword，pdf），我决定对两种类型的处理方式非常不同，因为我可能想优化/压缩/调整大小/生成缩略图我调用一种将图像保存到磁盘的特定方法，代码为：

I have got a stream object which may be an image or file (msword, pdf), I have decided to handle both types very differently, as I may want to optimize/ compress / resize / produce thumbnails etc. I call a specific method to save an image to disk, the code:

var file = StreamObject;

//if content-type == jpeg, png, bmp do...
    Image _image = Image.FromStream(file);
    _image.Save(path);

//if pdf, word do...

我该如何

//multimedia/ video?

我已经看了（可能不够努力），但是在任何地方都找不到...

I have looked (not hard enough probably) but I could not find it anywhere...

答

对于文件类型，您可以依靠FileExtensions；将其写入磁盘时，可以使用 BinaryWriter 。或 FileStream 。

For file Type you can rely on FileExtentions and for writing it to disk you can use BinaryWriter. or a FileStream.

示例（假设您已经有一个流）：

Example (Assuming you already have a stream):

FileStream fileStream = File.Create(fileFullPath, (int)stream.Length);
// Initialize the bytes array with the stream length and then fill it with data
byte[] bytesInStream = new byte[stream.Length];
stream.Read(bytesInStream, 0, bytesInStream.Length);    
// Use write method to write to the file specified above
fileStream.Write(bytesInStream, 0, bytesInStream.Length);
//Close the filestream
fileStream.Close();

使用C＃将文件（从流）保存到磁盘

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