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C#
protected void Page_Load(object sender, EventArgs e)
{
List<Employee> empList = new List<Employee>();
empList.Add(new Employee() { ID = 1, FName = "John", Age=23, Sex='M' });
empList.Add(new Employee() { ID = 2, FName = "Mary", Age = 25, Sex = 'F' });
empList.Add(new Employee() { ID = 3, FName = "Amber", Age = 23, Sex = 'M' });
empList.Add(new Employee() { ID = 4, FName = "Kathy", Age=25, Sex='M'});
empList.Add(new Employee() { ID = 5, FName = "Lena", Age=27, Sex='F'});
empList.Add(new Employee() { ID = 6, FName = "John", Age = 28, Sex = 'M' });
empList.Add(new Employee() { ID = 7, FName = "Kathy", Age = 27, Sex = 'F' });
empList.Add(new Employee() { ID = 8, FName = "John", Age = 28, Sex = 'M' });
var dup = empList
.GroupBy(x => new { x.FName })
.Select(group => new { Name = group.Key, Count = group.Count() })
.OrderByDescending(x => x.Count);
foreach (var x in dup)
{
Response.Write(x.Count + " " + x.Name);
}
}
class Employee
{
public int ID { get; set; }
public string FName { get; set; }
public int Age { get; set; }
public char Sex { get; set; }
}
VB.NET
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
Dim empList As New List(Of Employee)()
empList.Add(New Employee() With {.ID = 1, .FName = "John", .Age = 23, .Sex = "M"c})
empList.Add(New Employee() With {.ID = 2, .FName = "Mary", .Age = 25, .Sex = "F"c})
empList.Add(New Employee() With {.ID = 3, .FName = "Amber", .Age = 23, .Sex = "M"c})
empList.Add(New Employee() With {.ID = 4, .FName = "Kathy", .Age = 25, .Sex = "M"c})
empList.Add(New Employee() With {.ID = 5, .FName = "Lena", .Age = 27, .Sex = "F"c})
empList.Add(New Employee() With {.ID = 6, .FName = "John", .Age = 28, .Sex = "M"c})
empList.Add(New Employee() With {.ID = 7, .FName = "Kathy", .Age = 27, .Sex = "F"c})
empList.Add(New Employee() With {.ID = 8, .FName = "John", .Age = 28, .Sex = "M"c})
Dim dup = empList _
.GroupBy(Function(x) New With {Key x.FName}) _
.Select(Function(group) New With {Key .Name = group.Key, Key .Count = group.Count()}) _
.OrderByDescending(Function(x) x.Count)
For Each x In dup
' Use x.count and x.Name
Next x
End Sub
Friend Class Employee
Private privateID As Integer
Public Property ID() As Integer
Get
Return privateID
End Get
Set(ByVal value As Integer)
privateID = value
End Set
End Property
Private privateFName As String
Public Property FName() As String
Get
Return privateFName
End Get
Set(ByVal value As String)
privateFName = value
End Set
End Property
Private privateAge As Integer
Public Property Age() As Integer
Get
Return privateAge
End Get
Set(ByVal value As Integer)
privateAge = value
End Set
End Property
Private privateSex As Char
Public Property Sex() As Char
Get
Return privateSex
End Get
Set(ByVal value As Char)
privateSex = value
End Set
End Property
End Class
End Class
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