How to update document Name field using C# CSOM?

Question

I have a ListItem and would like to set the Name field for a file in a doc library. Researching this question I have seen that you can set an SPListItem name like this

SPListItem oListItem = oList.Items[0];
oListItem["Name"] = "xyz";           
oListItem.Update();

I am assuming it's different because I am using ListItem and not SPListItem because when I tried to do that in my solution it says the field Name does not exist. What is the right way to do this with ListItem?

ListItem listItem = uploadFile.ListItemAllFields;
listItem["Name"] = "xyz";
listItem.Update();

Answer 1

The field I needed to update was FileLeafRef.

After I implemented that change I was still getting an error message (File Not Found). This was because I was uploading the document to the library and you can't update the name of a file that was used when it was first uploaded into SharePoint. I had to add a method to update the file Name after the file was finished uploading, below is the code from that method.

item["FileLeafRef"] = fileName;
item.Update();
clientContext.ExecuteQuery();