VB.net - Sorting only one column in datagridview - vb.net

Question

I'm populating a DataGridView from an Excel file, and trying to sort only ONE column of my choice, other columns should remain as-is. How can it be achieved? Should the component be changed to something else, in case it is not possible in DataGridView?

Answer 1

I Created a List of my custom class, and this class will handle the sorting based on my preference (Randomization in this case)
Public Class Mylist
Implements IComparable(Of Mylist)
Private p_name As String
Private r_id As Integer
Public Property Pname() As String 'This will hold the contents of DGV that I want sorted
Get
Return p_name
End Get
Set(value As String)
p_name = value
End Set
End Property
Public Property Rid() As Integer 'This will be the basis of sort
Get
Return r_id
End Get
Set(value As Integer)
r_id = value
End Set
End Property
Private Function IComparable_CompareTo(other As Mylist) As Integer Implements IComparable(Of Mylist).CompareTo
If other Is Nothing Then
Return 1
Else
Return Me.Rid.CompareTo(other.Rid)
End If
End Function
End Class
Then a Button which will sort the contents:
Dim selcol = xlView.CurrentCell.ColumnIndex
Dim rand = New Random()
Dim x As Integer = 0
Dim plist As New List(Of Mylist)
Do While x < xlView.Rows.Count
plist.Add(New Mylist() With {
.Pname = xlView.Rows(x).Cells(selcol).Value,
.Rid = rand.Next()
})
x += 1
Loop
plist.Sort()
x = 0
Do While x < xlView.Rows.Count
xlView.Rows(x).Cells(selcol).Value = plist.ElementAt(x).Pname
x += 1
Loop
xlView.Update()
plist.Clear()
I'm open to any changes to code, as long as it achieves the same result.

Answer 2

Here is the simpler version. Pass the column index will do like Call SortSingleColum(0)
Private Sub SortSingleColumn(x As Integer)
Dim DataCollection As New List(Of String)
For i = 0 To dgvImport.RowCount - 2
DataCollection.Add(dgvImport.Item(x, i).Value)
Next
Dim t As Integer = 0
For Each item As String In DataCollection.OrderBy(Function(z) z.ToString)
dgvImport.Item(x, t).Value = item
t = t + 1
Next
End Sub