private bool TryAdd()
{
string name = this.txtName.Text.Trim();
if (string.IsNullOrEmpty(name))
{
MessageBox.Show("食材单位名称不能为空！");
return(false);
}
var unit = new IngredientUnit()
{
Name = name
};
IDictionary <Guid, IngredientUnit> unitDict = IngredientUnit.GetAll();
var result = from item in unitDict.Values
where item.Name == unit.Name
select item;
if (result.Count() > 0)
{
MessageBox.Show(string.Format("已存在名为【{0}】的食材单位名称！", name), "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
return(false);
}
unitDict.Add(unit.Id, unit);
IngredientUnit.SaveDatabase(typeof(IngredientUnit).Name);
return(true);
}
private void btnDelete_Click(object sender, EventArgs e)
{
var selectedItem = this.lstUnit.SelectedItem;
if (selectedItem != null)
{
if (MessageBox.Show(string.Format("是否确认删除【{0}】单位名称？（这将同步删除使用此单位名称的食材和使用这些食材的菜品！）", selectedItem), "询问", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
{
// 删除category
var unit = selectedItem as IngredientUnit;
IDictionary <Guid, IngredientUnit> categoryDict = IngredientUnit.GetAll();
categoryDict.Remove(unit.Id);
// 删除关联到unit的食材ingredient
IDictionary <Guid, Ingredient> ingredientDict = Ingredient.GetAll();
var toBeDeletedIngredients = (from item in ingredientDict.Values
where item.Unit.Id == unit.Id
select item.Id).ToList();
foreach (var id in toBeDeletedIngredients)
{
ingredientDict.Remove(id);
}
// 删除关联到食材ingredient的菜品dish
IDictionary <Guid, Dish> dishDict = Dish.GetAll();
var toBeDeletedDishes = new List <Dish>();
foreach (var dish in dishDict.Values)
{
foreach (var weightedIngredient in dish.WeightedIngredientList)
{
if (toBeDeletedIngredients.Contains(weightedIngredient.Ingredient.Id))
{
toBeDeletedDishes.Add(dish);
break;
}
}
}
foreach (var dish in toBeDeletedDishes)
{
dishDict.Remove(dish.Id);
}
IngredientUnit.SaveDatabase(typeof(IngredientUnit).Name);
Ingredient.SaveDatabase(typeof(Ingredient).Name);
Dish.SaveDatabase(typeof(Dish).Name);
this.lstUnit.Items.Remove(selectedItem);
MessageBox.Show("已删除此单位名称！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
private bool TryAdd()
{
string name = this.txtName.Text.Trim();
if (string.IsNullOrEmpty(name))
{
MessageBox.Show("食材单位名称不能为空！");
return(false);
}
this.unit.Name = this.txtName.Text.Trim();
IngredientUnit.SaveDatabase(typeof(IngredientUnit).Name);
return(true);
}
