Uploading file version - Client Object Model

Question

I have a library with versioned files. I have versioned files prepared for uploading (1 version = 1 file). How do I create new version? Do I just set file's Content property and Update it? Please share your experinces, thanks

edit: I have something like this:

File1|v1
File1|v2
File1|v4
File2|v2
File2|v5

So I have missing versions. Is it possible to set file version when uploading (item's field?)? If not, I will fill missing version with previous/next versions, for example File2|v1 will be filled with File2|v2.

Answer 1

I don't know how to programmatically assign the version number, but if it is OK to let SharePoint assign the version number...

With the server version of the method:

SPFileCollection.Add(urlOfFile, fileContent, overwrite);

if you pass in overwrite=true and the document library has versioning turned on, I think it will create a new version of the document. (That's the behavior through the browser.) I assume the Client Object Model version of the method would behave the same way.

FileCreationInformation fci = new FileCreationInformation();
fci.Url = urlOfFile;
fci.Content = fileContent;
fci.Overwrite = true;
folder.files.Add(fci);

So, as long as you upload the files in the correct order of their versions, SharePoint should create each version for you.

Answer 2

Here is a little code sample that will simulate versioning of a file

public File changeDocumentVersion(string version,File file){
    string [] versions = version.Split(new char[]{'.'});
    int minor = Int32.Parse(versions[1]);
    int major = Int32.Parse(versions[0]);

    for (int i = 1; i < major; i++)
    {
        file.CheckOut();
        file.CheckIn("versioning", CheckinType.MajorCheckIn);
    }
    for (int i = 0; i < minor; i++)
    {
        file.CheckOut();
        file.CheckIn("versioning", CheckinType.MinorCheckIn);
        file.Context.Load(file);
        file.Context.ExecuteQuery();
    }
    return file;
}

Answer 3

As long as you have enabled versioning (found under list/library settings, then versioning) enabled SP will take care of the versioning for you.