How do I select distinct values in LINQ query?

How do I select distinct values in LINQ query?

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

  1. public JsonResult getEmpCity()
  2. {
  3. using (CompanyDBEntities dc = new CompanyDBEntities())
  4. {
  5. var query = (from p in dc. Emp_Information.
  6. select p. City). ToList();
  7. return new JsonResult.
  8. {

What is LINQ distinct?

LINQ Distinct operator is used for removing duplicates elements from the sequence (list). Distinct operator comes under Set operators category in LINQ query operators. For example, we have one collection A = { 1, 2, 3, 3, 4, 4, 5}. Distinct operator is only available in Method Syntax and not available in Query Syntax.

How do you use distinct in LINQ lambda expression?

  1. let Sample_Distinct_Linq() = let numbers = [|1; 2; 2; 3; 5; 6; 6; 6; 8; 9|] let result = query { for n in numbers do distinct select n } Debug.
  2. static void Sample_Distinct_Linq() { int[] numbers = { 1, 2, 2, 3, 5, 6, 6, 6, 8, 9 }; var result = (from n in numbers.

Does LINQ support method syntax?

Linq namespace generally uses method syntax. Therefore, even when getting started writing LINQ queries, it is useful to be familiar with how to use method syntax in queries and in query expressions themselves.

Why do we use distinct in C#?

The Distinct(IEnumerable) method returns an unordered sequence that contains no duplicate values. It uses the default equality comparer, Default, to compare values. In Visual Basic query expression syntax, a Distinct clause translates to an invocation of Distinct.

What is LINQ syntax?

LINQ query syntax is consist of a set of query keywords defined into the . NET Framework version 3.5 or Higher. This allows the programmer or developers to write the commands similar to SQL style in the code(C# or VB.NET) without using quotes. It is also know as the Query Expression Syntax.

What is method syntax?

Method syntax (also known as fluent syntax) uses extension methods included in the Enumerable or Queryable static class, similar to how you would call the extension method of any class. The compiler converts query syntax into method syntax at compile time.

What is Var in LINQ query?

In LINQ, a query variable is any variable that stores a query instead of the results of a query. More specifically, a query variable is always an enumerable type that will produce a sequence of elements when it is iterated over in a foreach statement or a direct call to its IEnumerator.MoveNext method.

Is LINQ to SQL supported?

LINQ to SQL is an O/RM (object relational mapping) implementation that ships in the .NET Framework “Orcas” release, and which allows you to model a relational database using .NET classes. You can then query the database using LINQ, as well as update/insert/delete data from it. LINQ to SQL fully supports transactions, views, and stored procedures.

How do you select distinct in SQL?

The SQL SELECT DISTINCT Statement. The SELECT DISTINCT statement is used to return only distinct (different) values. Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values.