How to show Distinct data using Linq to SQL

By bryan tugade

We can show Distinct data in gridview using Linq to SQL. We can compare in the result how the distinct function works in Linq to sql. Here's how.

Imports Microsoft.VisualBasic
Imports System.Linq
Imports System.Data.Linq

Partial Public Class WebForm1
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
        Dim adventureContext = New adventureWorks()

        Try
            Dim original_employee = (From employee In adventureContext.Employees Select employee.Title)

             Dim distinct_employee = (From employee In adventureContext.Employees Select employee.Title).Distinct()

             GridView1.DataSource = distinct_employee
             GridView1.DataBind()
            GridView2.DataSource = original_employee
             GridView2.DataBind()
        Catch ex As Exception

           Console.WriteLine(ex.Message)

        End Try
    End Sub
End Class

And here's the compared result of two queries.



As you can see the original data are not sorted and repeatedly shown in the gridview unlike when you used the distinct in Linq to sql the data are sorted and the data shown distinctively.

That's it! Happy Coding. : )

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How to show Distinct data using Linq to SQL  (1422 Views)