How to sort an array based on specific index [duplicate]

Question

I Have an array like below code :

    struct Book_Struct
    {
        public string Title;
        public string Auther;
        public int Date;
        public int ID;
    }

    static void Print(Book_Struct[] a, int b)
    {
        for (int i = 0; i < b; i++)
        {
            Console.WriteLine("  Name of Book " + (i + 1) + " is : " + "\" " + a[i].Title + " \"");
            Console.WriteLine("Auther of Book " + (i + 1) + " is : " + "\" " + a[i].Auther + " \"");
            Console.WriteLine("  Date of Book " + (i + 1) + " is : " + "\" " + a[i].Date + " \"");
            Console.WriteLine("    ID of Book " + (i + 1) + " is : " + "\" " + a[i].ID + " \"");
            Console.WriteLine("\n---------------------------------\n");
        }
    }

I want sort this array based on for example Title of Books. How do i it?

As an aside, I would strongly recommend against using mutable structs and public fields. It looks like this should probably be a class with public properties... you should also look into .NET naming conventions. — Jon Skeet
– Jon Skeet, Commented Jan 19, 2016 at 16:45
Also after 7 years @JonSkeet no longer recommends duplicate stackoverflow.com/questions/1304278/… (but it still relevant). You can find that recommendation in duplicate that talks explicitly about arrays. — Alexei Levenkov
– Alexei Levenkov, Commented Jan 19, 2016 at 16:58

Community · Accepted Answer · 2017-05-23 11:59:12Z

1

You could use Array.Sort:

Array.Sort(a, (b1, b2) => b1.Title.CompareTo(b2.Title));

or LINQ:

a = a.OrderBy(book => book.Title).ToArray();

The latter needs to recreate the array.

As an aside, use a class instead of a mutable struct.

edited May 23, 2017 at 11:59

CommunityBot

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answered Jan 19, 2016 at 16:44

Tim Schmelter

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Comments

Community · Accepted Answer · 2017-05-23 12:23:31Z

0

Use LINQ's OrderBy to sort the array:

a = a.OrderBy(x => x.Title).ToArray();

Reference

edited May 23, 2017 at 12:23

CommunityBot

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answered Jan 19, 2016 at 16:45

Shaharyar

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