Cant find method DataGridView.ClearSelection(Int32, Int32, Boolean)

Question

Hello, I am using VS VB.Net with .NET Framework 4.8.
I want to clear the selection of all cells in a row of a DataGridView except for one cell.
The .NET API Browser shows a method for that "ClearSelection(Int32, Int32, Boolean)".
But with my DataGridView that method is not available. I can only use the normal "ClearSelection()".
How can i use "ClearSelection(Int32, Int32, Boolean)"?

Answer 1

Hi,
you cannot find that method because is protected.

protected void ClearSelection (int columnIndexException, int rowIndexException, bool selectExceptionElement);

If you really need that method than you can extend DataGridView...

Try following demo:

Public Class Form1  
  
  Private WithEvents dgv As New ExtendedDataGridView With {.Dock = DockStyle.Fill}  
  
  Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load  
    Me.KeyPreview = True  
    Me.Controls.Add(dgv)  
    Dim col As New List(Of Data)  
    For i = 1 To 10  
      col.Add(New Data With {.ID = i, .Field1 = $"Row {i} Col 1", .Field2 = $"Row {i} Col 1"})  
    Next  
    dgv.DataSource = col  
  End Sub  
  
  Private Sub Form1_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown  
    If e.KeyCode = Keys.C Then  
      dgv.ClearSelectionEx(1, 5, True)  
      e.Handled = True  
    End If  
  End Sub  
  
  Public Class Data  
    Public Property ID As Integer  
    Public Property Field1 As String  
    Public Property Field2 As String  
  End Class  
  
  Public Class ExtendedDataGridView : Inherits DataGridView  
  
    Public Sub ClearSelectionEx(columnIndex As Integer, rowIndex As Integer, selectElement As Boolean)  
      MyBase.ClearSelection(columnIndex, rowIndex, selectElement)  
    End Sub  
  
  End Class  
  
End Class  

Result: