判断文件夹是否存在
public bool FolderExists(string library, string name) { using (var ctx = new ClientContext("http://sp2013")) { List sharedDocs = ctx.Web.Lists.GetByTitle(library); var query = ctx.LoadQuery(sharedDocs.RootFolder.Folders.Where(fd => fd.Name == name)); ctx.ExecuteQuery(); Folder f = query.SingleOrDefault(); return f != null; } }