How to return Dictionary as result from a LINQ Query in C# ?

by Ginktage | Sunday, Feb 10, 2013 | 494 views

This article will provide a code snippet and explains how to return Dictionary as result from a LINQ Query in C#.

There are times when you want to retrieve only the ID(distinct) and the name from the database table using LINQ . In scenarios like this , one can use the ToDictionary method to place the necessary properties to the dictionary and return them.

Below is a sample sourecode demonstrating the usage of ToDictionary method in LINQ Query

public class BlockbusterMovie

{

public string Name { get; set; }

public int ID { get; set; }

}

public class BlockbusterMovies : List<BlockbusterMovie>

{

public BlockbusterMovies()

{

Add(new BlockbusterMovie { Name = "Vishwaroopam", ID = 1 });

Add(new BlockbusterMovie { Name = "Endhiran", ID = 2 });

Add(new BlockbusterMovie { Name = "Thuppaki", ID = 3 });

Add(new BlockbusterMovie { Name = "Mankatha", ID = 4 });

}

}

The BlockbusterMovies class has the collection of movies which is used in the below code snippet to return the dictionary based on the ID and Name.

private void Form1_Load(object sender, EventArgs e)

{

List<BlockbusterMovie> movies = new BlockbusterMovies();

var LstMovies = movies.ToDictionary(Field => Field.ID, mc => mc.Name);

}
How to return Dictionary as result from a LINQ Query in C# ?

How to return Dictionary as result from a LINQ Query in C# ?

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