基类重载

Question

我有一个应用程序实体的基类：

public class LadderEntityBase : ICloneable
{
    public Guid PK { get; set; }
    public string Name { get; set; }
    public string Comment { get; set; }

    public object Clone()
    {
        return this.MemberwiseClone();
    }
}

然后从它派生两个类，具有相同的功能重载，允许创建具有或不具有PK（Guid）参数的那些类。如果省略PK参数 - 将创建新的Guid：

public class Order : LadderEntityBase
{
    public Order() : this(Guid.NewGuid())
    {
    }

    public Order(Guid guid)
    {
        this.PK = guid;
    }

    public string OrderFrom { get; set; }
}

和

public class Parcel : LadderEntityBase
{
    public Parcel() : this(Guid.NewGuid())
    {
    }

    public Parcel(Guid guid)
    {
        this.PK = guid;
    }

    public string SentTo { get; set; }
}

是否可以将Order和Parcel的两个构造函数移动到基类中？

Answer 1

我相信它尽你所能。移动基类中的所有逻辑，并在继承的

中保留基本调用

[HttpGet("[action]")]
public async Task<myPaginatedReturnedData> MyMethod(int page)
{
    int perPage = 10;
    int start = (page - 1) * perPage;

    using (HttpClient client = new HttpClient())
    {
        client.BaseAddress = new Uri("externalAPI");
        MediaTypeWithQualityHeaderValue contentType =
            new MediaTypeWithQualityHeaderValue("application/json");
        client.DefaultRequestHeaders.Accept.Add(contentType);
        HttpResponseMessage response = await client.GetAsync(client.BaseAddress);
        string content = await response.Content.ReadAsStringAsync();
        IEnumerable<myReturnedData> data = 
               JsonConvert.DeserializeObject<IEnumerable<myReturnedData>>(content);
        myPaginatedReturnedData datasent = new myPaginatedReturnedData
        {
            Count = data.Count(),
            myReturnedData = data.Skip(start).Take(perPage).ToList(),
        };
        return datasent;
    }
}

Answer 2

您可以在Base类本身上设置PK，然后使用base关键字设置GUID（如果您希望两个派生类都有不同的GUID）。

public class LadderEntityBase : ICloneable
    {
        public Guid PK { get; set; }
        public string Name { get; set; }
        public string Comment { get; set; }
        public LadderEntityBase(Guid guid)
        {
            this.PK = guid;

        }

        public object Clone()
        {
            return this.MemberwiseClone();
        }
    }

    public class Order : LadderEntityBase
    {
        public Order() : this(Guid.NewGuid())
        {
        }

        public Order(Guid guid) : base(guid)
        {

        }

        public string OrderFrom { get; set; }
    }

    public class Parcel : LadderEntityBase
    {
        public Parcel() : this(Guid.NewGuid())
        {
        }

        public Parcel(Guid guid) :base( guid)
        {

        }

        public string SentTo { get; set; }
    }