Rename File Using SharePoint Client Object Model? - sharepoint-2010

Question

This may seem like a stupid question but I can't seem to find any answers on Google.
I have written a method to query SharePoint and rename a document based on the document name parameter I specify. I have used a similar method to rename folders and this has worked fine however when I try to rename a file I get an ArgumentOutOfRangeException
Here is my code:
public bool RenameFileInDocumentLibrary(string documentName, string newDocumentName, ClientContext clientContext)
{
{
bool isDocumentRenamed = false;
string url = "MySharePointSite";
List list = clientContext.Web.Lists.GetByTitle("MyDocLib");
CamlQuery query = new CamlQuery();
query.ViewXml = "<View Scope=\"RecursiveAll\"> " +
"<Query>" +
"<Where>" +
"<And>" +
"<Eq>" +
"<FieldRef Name=\"FSObjType\" />" +
"<Value Type=\"Integer\">2</Value>" +
"</Eq>" +
"<Eq>" +
"<FieldRef Name=\"Title\"/>" +
"<Value Type=\"Text\">" + documentName + "</Value>" +
"</Eq>" +
"</And>" +
"</Where>" +
"</Query>" +
"</View>";
var files = list.GetItems(query);
clientContext.Load(list);
clientContext.Load(list.Fields);
clientContext.Load(files, fs => fs.Include(fi => fi["Title"],
fi => fi["DisplayName"],
fi => fi["FileLeafRef"]));
clientContext.ExecuteQuery();
if (files.Count == 0)
{
files[0]["Title"] = newDocumentName;
files[0]["FileLeafRef"] = newDocumentName;
files[0].Update();
clientContext.ExecuteQuery();
isDocumentRenamed = true;
}
return isDocumentRenamed;
}
}
}
Any help with this would be appreciated. Thanks!

Answer 1

You need to use the ListItems File member:
string newPath = files[0]["FileDirRef"] + "/" + "MyNewFileName" + ".extension";
files[0].File.MoveTo(newPath, MoveOperations.Overwrite);
files[0].Update();
clientContext.ExecuteQuery();