Question

首先我会解释我的问题，然后我会问......

我有三个实体，所有者，保护者和动物...... 动物可以有一个所有者或一个保护者，到目前为止，这么好......

但是，当我在ListView中对此进行分组时，如果我为Owner.Name放置PropertyGroupDescription，如果动物有一个Protector作为其所有者，则在ListView中该组将为空白。

我的实体：

public partial class Animal : BaseModel
{
    public int Id { get; set; }
    public string Name { get; set; }
    public virtual AnimalSpecie AnimalSpecie { get; set; }
    public virtual AnimalBreed AnimalBreed { get; set; }
    public DateTime DateBirth { get; set; }
    public Gender Gender { get; set; }
    public decimal Weight { get; set; }
    public bool Vaccinated { get; set; }
    public bool Castrated { get; set; }
    public virtual Owner Owner { get; set; }
    public virtual Protector Protector { get; set; }
    public DateTime InsertDate { get; set; }
    public DateTime UpdateDate { get; set; }

    public Animal()
    {
        this.Owner = new Owner();
        this.Protector = new Protector();
    }
}

public partial class BaseOwner : BaseModel
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Address { get; set; }
    public string Phone { get; set; }
    public string FormatedPhone
    {
        get
        {
            if (this.Phone == null)
                return string.Empty;

            switch (this.Phone.Length)
            {
                case 11:
                    return Regex.Replace(this.Phone, @"(\d{2})(\d{4})(\d{4})", "($1) $2-$3");
                case 12:
                    return Regex.Replace(this.Phone, @"(\d{2})(\d{5})(\d{4})", "($1) $2-$3");
                default:
                    return this.Phone;
            }
        }
    }
    public string CellPhone { get; set; }
    public string FormatedCellPhone
    {
        get
        {
            if (this.CellPhone == null)
                return string.Empty;

            switch (this.CellPhone.Length)
            {
                case 11:
                    return Regex.Replace(this.Phone, @"(\d{2})(\d{4})(\d{4})", "($1) $2-$3");
                case 12:
                    return Regex.Replace(this.Phone, @"(\d{2})(\d{5})(\d{4})", "($1) $2-$3");
                default:
                    return this.CellPhone;
            }
        }
    }
    public string Email { get; set; }
    public virtual ICollection<Animal> Animals { get; set; }
}

所有者和保护者派生自BaseOwner。

如何在组说明中显示所有者的姓名或保护者的姓名？

Ps。：首先，抱歉我的英语，如果不清楚，我会尝试重新制定。

Ps.2：我正在使用MVVM。

更新

我在这里取得了一些进展：

ListView ListViewAnimal = (ListView)this.AnimalView.FindName("ListViewAnimal");

            this._AnimalsOriginal = new Repository.Animal().GetAllCompleted();
            this.Animals = new Repository.Animal().GetAllCompleted();

            if (this.ListViewItems == null)
            {
                this.ListViewItems = new CollectionViewSource { Source = this.Animals };
            }

            foreach (var animal in this.Animals)
            {
                if (animal.Owner.Id > 0)
                {
                        this.ListViewItems.GroupDescriptions.Add(new PropertyGroupDescription("Owner.Name")); 
                }
                else
                {
                    this.ListViewItems.GroupDescriptions.Add(new PropertyGroupDescription("Protector.Name"));
                }                    
            }

            ListViewAnimal.ItemsSource = this.ListViewItems.View;

这是一次尝试，而不是最终的代码，但我得到一个奇怪的结果，一个项目有两个组名。

有什么想法吗？

Answer 1

解决问题的一种简单方法是在Property类中定义一个只有getter的新Animal，并使用此属性进行分组。

下面我展示了getter

的示例实现

public partial class Animal : Base Model
{
    public virtual Owner Owner { get; set; }
    public virtual Protector Protector { get; set; }

    public string ActiveCareTacker
    {
        get
        {
            if (Owner != null && string.IsNullOrEmpty(Owner.Name) == false)
                return Owner.Name;

            if (Protector != null && string.IsNullOrEmpty(Protector.Name) == false)
                return Protector.Name;

            return "No Owner/Protector";
        }
    }
}

如何在ListView中显示GroupDescription中的两个名称

1 个答案: