Read several byte from file via http c#

Question

How to download first 200 bytes of a file via HTTP protocol using C#?
I believed it could be done like this:

WebClient wc = new WebClient();
byte[] buffer = new byte[200];
using (var stream = wc.OpenRead(fileName))
{
     stream.Read(buffer, 0, 200);
}

but when wc.OpenRead it called it downloads the whole file.

@Jon: No, that's certainly not a duplicate as this is C# and the other is Java. — Daniel Hilgarth
– Daniel Hilgarth, Commented Jun 10, 2011 at 10:11

The Evil Greebo · Accepted Answer · 2011-06-10 10:13:43Z

5

You need to set a Range Header on your WebClient before you invoke the OpenRead method.

answered Jun 10, 2011 at 10:13

The Evil Greebo

7,1753 gold badges31 silver badges56 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Could you please provide a source how to do it. I tried wc.Headers.Add("Range", "bytes=0-200"); but wc.OpenRead(fileName) throws an exception.

What is the exception being thrown, please?

I did what I needed using WebRequest.