How can we get distinct values from database using LINQ?

By Using LINQ we can read distinct values….LINQ: Read Distinct Record from Data Table

Table of Contents

public JsonResult getEmpCity()
{
using (CompanyDBEntities dc = new CompanyDBEntities())
{
var query = (from p in dc. Emp_Information.
select p. City). ToList();
return new JsonResult.
{

What is distinct () in C#?

C# Linq Distinct() method removes the duplicate elements from a sequence (list) and returns the distinct elements from a single data source. It comes under the Set operators’ category in LINQ query operators, and the method works the same way as the DISTINCT directive in Structured Query Language (SQL).

How do you find the index of an element in LINQ?

LINQ does not have an IndexOf method. So to find out index of a specific item we need to use FindIndex as int index = List. FindIndex(your condition);

How does LINQ distinct work?

LINQ Distinct operator removes all the duplicate values from the collection and finally returns the dissimilar or unique values. The LINQ Distinct operator available in only Method Syntax and it not supports the Query Syntax. LINQ Distinct is an operator which comes under Set Operator.

Which operator returns distinct elements in two sets?

The following table lists all Set operators available in LINQ. Returns distinct values from a collection. Returns the difference between two sequences, which means the elements of one collection that do not appear in the second collection.

Do C# lists start at 0?

They are 0 based. Count will start with one however if the list has any items in it.

Why distinct is not working in Linq?

LINQ Distinct is not that smart when it comes to custom objects. All it does is look at your list and see that it has two different objects (it doesn’t care that they have the same values for the member fields). One workaround is to implement the IEquatable interface as shown here.

How do I get unique values from two lists?

“compare two list and print unique values python” Code Answer

list1 = [1, 2, 4]
list2 = [4, 5, 6]
set_difference = set(list1) – set(list2)
list_difference = list(set_difference)
print(list_difference)

Does LINQ Union remove duplicates?

Linq, acts upon 2 collections. It returns a new collection that contains the elements that are found. Union removes duplicates. So this method can be thought of as two actions: it combines the two collections and then uses Distinct() on them, removing duplicate elements.

Does C# index from 0 or 1?

Arrays were a pointer to an address in memory of the index. This index was the 1st element of the array. Here, the index is like an offset and the concept even before C language originated.

Does list index start 0 or 1 C#?

They are 0 based. Count will start with one however if the list has any items in it. From MSDN if you cared to look it up: Elements in this collection can be accessed using an integer index.