Question

Is there a way other than looping through the Files in a SPFolder to determine if a give filename (string) exists?

Answer 1

You can, if you know the URL also use the SPFile.Exists property as follows:

using (SPSite site = new SPSite('http://server/site')) using (SPWeb web = site.OpenWeb()) {   SPFile file = web.GetFile('/site/doclib/folder/filename.ext');   if (file.Exists)   {     ...   } } 

One would on first thought assume SPWeb.GetFile throws an exception if the file does not exist. But as you see this is not the case – it will actually return a SPFile object.