How do I save a stream to a file in C#?


Question

I have a StreamReader object that I initialized with a stream, now I want to save this stream to disk (the stream may be a .gif or .jpg or .pdf).

Existing Code:

StreamReader sr = new StreamReader(myOtherObject.InputStream);
  1. I need to save this to disk (I have the filename).
  2. In the future I may want to store this to SQL Server.

I have the encoding type also, which I will need if I store it to SQL Server, correct?

1
663
10/12/2018 10:21:13 AM

As highlighted by Tilendor in Jon Skeet's answer, streams have a CopyTo method since .NET 4.

var fileStream = File.Create("C:\\Path\\To\\File");
myOtherObject.InputStream.Seek(0, SeekOrigin.Begin);
myOtherObject.InputStream.CopyTo(fileStream);
fileStream.Close();

Or with the using syntax:

using (var fileStream = File.Create("C:\\Path\\To\\File"))
{
    myOtherObject.InputStream.Seek(0, SeekOrigin.Begin);
    myOtherObject.InputStream.CopyTo(fileStream);
}
858
12/28/2014 3:02:27 PM

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