<RelayAction TargetControl="{Binding ElementName=GCInstoragePart}" MethodName="GridClick"   MethodParameter="{XParamBinding me}"  TriggerEvent="Click" />

 public void GridClick(RelayAction r, ExecuteEventArgs e)
            {
                var mouse = e.TriggerParameter as MouseButtonEventArgs;
                var viewCon = e.MethodParameter as InstorageCount;
                var hitInfo = ((DevExpress.Xpf.Grid.TableView)viewCon.GVInstoragePartInf).CalcHitInfo((DependencyObject)mouse.OriginalSource);

                if (hitInfo.InRow)//点击在行中
                {
                    //事件处理
                }
            }