private void Create()
        {
            TableMakerProductType proT = new TableMakerProductType();                                  //实例化一个新的model
            TableMakerProductTypeEditViewModel proTevm = new TableMakerProductTypeEditViewModel(proT); //实例化一个新的view model

            proTevm.DisplayName = "Table Maker Product Type-Create";
            var TableMakerProductTypeEditViewInstance = new TableMakerProductTypeView();      //实例化一个新的view

            TableMakerProductTypeEditViewInstance.DataContext = proTevm;
            TableMakerProductTypeEditViewInstance.ShowDialog();                   //设置viewmodel属性
            if (proTevm.IsOK == true)
            {
                _programTypeService.SuperAdd(proT);
            }
        }
        private void SaveAs()
        {
            TableMakerProductType proT = new TableMakerProductType();                                  //实例化一个新的model
            TableMakerProductTypeEditViewModel proTevm = new TableMakerProductTypeEditViewModel(proT); //实例化一个新的view model

            proTevm.DisplayName = "Table Maker Product Type-Save As";
            proTevm.Description = _selectedItem.Description;

            var TableMakerProductTypeEditViewInstance = new TableMakerProductTypeView();      //实例化一个新的view

            TableMakerProductTypeEditViewInstance.DataContext = proTevm;
            TableMakerProductTypeEditViewInstance.ShowDialog();
            if (proTevm.IsOK == true)
            {
                _programTypeService.SuperAdd(proT);
            }
        }