Union,Except and Intersect operator in Linq
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by Jalpesh P. Vadgama
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Published on Thu, 17 Jun 2010 20:14:28 GMT
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2010/06/17
20:24 UTC
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While developing a windows service using Linq-To-SQL i was in need of something that will intersect the two list and return a list with the result. After searching on net i have found three great use full operators in Linq Union,Except and Intersect. Here are explanation of each operator.
Union Operator: Union operator will combine elements of both entity and return result as third new entities.
Except Operator: Except operator will remove elements of first entities which elements are there in second entities and will return as third new entities.
Intersect Operator: As name suggest it will return common elements of both entities and return result as new entities.
Let’s take a simple console application as a example where i have used two string array and applied the three operator one by one and print the result using Console.Writeline. Here is the code for that.
- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
-
-
- namespace ConsoleApplication1
- {
- class Program
- {
- static void Main(string[] args)
- {
- string[] a = { "a", "b", "c", "d" };
- string[] b = { "d","e","f","g"};
-
- var UnResult = a.Union(b);
- Console.WriteLine("Union Result");
- foreach (string s in UnResult)
- {
- Console.WriteLine(s);
- }
-
- var ExResult = a.Except(b);
- Console.WriteLine("Except Result");
- foreach (string s in ExResult)
- {
- Console.WriteLine(s);
- }
-
- var InResult = a.Intersect(b);
- Console.WriteLine("Intersect Result");
- foreach (string s in InResult)
- {
- Console.WriteLine(s);
- }
- Console.ReadLine();
-
- }
-
- }
- }
-
Here is the output of console application as Expected.
Hope this will help you..
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