public void DeleteFile(int fileId)
{
DepotManagementDataContext ctx = CommentParameter.DepotDataContext;
var varData = from a in ctx.FM_FileList
where a.FileID == fileId
select a;
if (varData.Count() != 1)
{
throw new Exception("数据不唯一");
}
FileOperationService.File_Delete(varData.Single().FileUnique, CE_CommunicationMode.FTP);
ctx.FM_FileList.DeleteAllOnSubmit(varData);
ctx.SubmitChanges();
}