6
मैंने ऐसा करने की कोशिश की जैसे मैं एक अज्ञात प्रकार के साथ सी # में होगा, लेकिन परिणाम सिर्फ सही नहीं है।VB.NET के साथ एकाधिक कॉलम पर समूह करने के लिए GroupBy() का उपयोग कैसे करें?
VB.NET उदाहरण (गलत उत्पादन):
Module Module1
Sub Main()
Dim ls As List(Of Employee) = New List(Of Employee)
ls.Add(New Employee With {.Age = 20, .Sex = "M"})
ls.Add(New Employee With {.Age = 20, .Sex = "M"})
ls.Add(New Employee With {.Age = 20, .Sex = "M"})
ls.Add(New Employee With {.Age = 30, .Sex = "F"})
ls.Add(New Employee With {.Age = 30, .Sex = "F"})
For Each item In ls.GroupBy(Function(k) New With {.Age = k.Age, .Sex = k.Sex})
Console.WriteLine(String.Format("Group [Age: {0}, Sex: {1}] : {2} Item(s)", item.Key.Age, item.Key.Sex, item.Count()))
Next
Console.ReadLine()
End Sub
Class Employee
Private _Age As Integer
Public Property Age() As Integer
Get
Return _Age
End Get
Set(ByVal value As Integer)
_Age = value
End Set
End Property
Private _Sex As String
Public Property Sex() As String
Get
Return _Sex
End Get
Set(ByVal value As String)
_Sex = value
End Set
End Property
End Class
End Module
आउटपुट:
Group [Age: 20, Sex: M] : 1 Item(s)
Group [Age: 20, Sex: M] : 1 Item(s)
Group [Age: 20, Sex: M] : 1 Item(s)
Group [Age: 30, Sex: F] : 1 Item(s)
Group [Age: 30, Sex: F] : 1 Item(s)
वांछित उत्पादन:
Group [Age: 20, Sex: M] : 3 Item(s)
Group [Age: 30, Sex: F] : 2 Item(s)
सी # उदाहरण (सही उत्पादन):
class Program
{
static void Main(string[] args)
{
List<Employee> ls = new List<Employee>();
ls.Add(new Employee { Age = 20, Sex = "M" });
ls.Add(new Employee { Age = 20, Sex = "M" });
ls.Add(new Employee { Age = 20, Sex = "M" });
ls.Add(new Employee { Age = 30, Sex = "F" });
ls.Add(new Employee { Age = 30, Sex = "F" });
foreach (var item in ls.GroupBy(k => new { Age = k.Age, Sex = k.Sex }))
{
Console.WriteLine(String.Format("Group [Age: {0}, Sex: {1}] : {2} Item(s)", item.Key.Age, item.Key.Sex, item.Count()));
}
Console.ReadLine();
}
class Employee
{
public int Age { get; set; }
public string Sex { get; set; }
}
}
कोई भी देखता है कि मेरी त्रुटि कहां है?