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 using (LongXingDBDataContext db = new LongXingDBDataContext())
             {
                 DeviceInfo di;
                 di = new DeviceInfo();
                            
                 var a = db.ExecuteQuery<DateTime>("select  getdate()",new object[] {});               
                 di.CreateDate = a.First();
                 db.DeviceInfo.InsertOnSubmit(di);
                 db.SubmitChanges();
                 this.toolTip1.Show("±£´æÍê±Ï", this, ((Control)sender).Location, 2000);
             }