SPFile.CopyTo SPFile.MoveTo How to move a file across SharePoint sites programmatically

I think we've all tried SPFile.CopyTo(destUrl) or SPFile.MoveTo(destUrl) and have quickly found that it doesn't allow us to move that file across SharePoint sites. How then can we copy a file from one site to the other programmatically?

Well we need to use the SPFileCollection.Add method as demonstrated below. Sure it's not as easy as a one liner but it gets the job done just the same and more importantly it lets you do it between sites and site collections.

//copy the file to another site document library

using (SPSite spSite = new SPSite("http://destination site url/"))

{

string destinationUrl = "some destination url/" + spFile.Name;

SPFileCollection spFiles = spSite.AllWebs["site relative url"].GetFolder("Doc Lib Name").Files;

byte[] bFile = spFile.OpenBinary(); //spFile is the source file

spFiles.Add(destinationUrl, bFile, true);

}

Basically open up your destination site, get the file collection object from the source document library, add the binary representation of the file to the file collection object and that's it.