How to generate an array from multiples properties of a class

Question

Having a simple model:

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

And a collection:

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

I want to do the following:

var headerCollection = new List<string>();

foreach(var item in myCollection)
{
    headerCollection.add(item.prop1);
    headerCollection.add("Total");
    headerCollection.add("Date");
    //...
    headerCollection.add(item.prop2);
}

But I need to use linq to objects.

I tried:

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

But it generates a collection of type: List<string[]>. How to solve this?

Justin Niessner · Accepted Answer · 2014-07-03 16:36:59Z

3

You just have to use SelectMany instead of Select:

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

answered Jul 3, 2014 at 16:36

Justin Niessner

246k40 gold badges416 silver badges546 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Selman Genç · Accepted Answer · 2014-07-03 16:37:05Z

1

Use SelectMany after Select:

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

answered Jul 3, 2014 at 16:37

Selman Genç

102k15 gold badges126 silver badges193 bronze badges

Comments

Dennis_E · Accepted Answer · 2014-07-03 16:43:03Z

0

Change Select to SelectMany:

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

answered Jul 3, 2014 at 16:43

Dennis_E

8,90426 silver badges32 bronze badges

Collectives™ on Stack Overflow

How to generate an array from multiples properties of a class

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related