C# 如何从类的多个属性生成数组

有一个简单的模型：

public class SimpleClass
{
    public string prop1 { get; set; }
    public string prop2 { get; set;}
}

和一个集合：

List<SimpleClass> myCollection = new List<SimpleClass>();

---

但它会生成一个类型的集合：

List

。如何解决此问题？

您只需使用

SelectMany

而不是

Select

：

var mh = myCollection.SelectMany(i =>
    new[] { i.CON_DESCRIPTION, "Total", "Date", i.prop2 });

var modifiedHeaders = myCollection
       .Select(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 })
       .SelectMany(x => x);

---

您只需使用

SelectMany

而不是

Select

：

var mh = myCollection.SelectMany(i =>
    new[] { i.CON_DESCRIPTION, "Total", "Date", i.prop2 });

var modifiedHeaders = myCollection
       .Select(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 })
       .SelectMany(x => x);

---

在

Select

之后使用

SelectMany

：

var mh = myCollection.SelectMany(i =>
    new[] { i.CON_DESCRIPTION, "Total", "Date", i.prop2 });

var modifiedHeaders = myCollection
       .Select(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 })
       .SelectMany(x => x);

---

在

Select

之后使用

SelectMany

：

var mh = myCollection.SelectMany(i =>
    new[] { i.CON_DESCRIPTION, "Total", "Date", i.prop2 });

var modifiedHeaders = myCollection
       .Select(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 })
       .SelectMany(x => x);

---

将Select更改为SelectMany：

var modifiedHeaders = myCollection
    .SelectMany(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 });

---

将Select更改为SelectMany：

var modifiedHeaders = myCollection
    .SelectMany(item => new[] { item.CON_DESCRIPCION, "Total", "Date", item.prop2 });