删除DataTable行，选定DataGridView行的源，单击按钮

Question

I have this DataTable called ProductTable that have 3 columns that serves as the source for the DataGridView ProductGrid .

When clicking on the button DeleteRow , the user should delete the row in ProductTable that correspond the selected row in ProductGrid

I tried with

Private Sub DeleteRow_Click(sender As Object, e As EventArgs) Handles DeleteRow.Click

    Dim i As Integer

    For i = 0 To 100
        Try
            ProductTable.Rows(i).Delete()
        Catch ex As Exception
        End Try
    Next

End Sub

But I'm missing something obvious : The condition that allows me to pick the row in the DataTable that would correspond to ProductGrid.SelectedCells(0).Value.ToString() .

But I don't know how to do it, as ProductTable.Rows(i).Columns(0).Value doesn't work since Columns isn't a member of the Row object.

Answer 1

You may have a problem deleting a row from the bound DataTable using the grids “selected” row index if the grid is “Sorted or Filtered”. I am betting the wrong rows will get deleted from the DataTable when the grid is sorted or filtered.

To fix this, I suggest using the grids DataBoundItem from the selected row. This should ensure the proper row is removed from the DataTable . Something like below…

Private Sub btnDelete_Click(sender As Object, e As EventArgs) Handles btnDelete.Click
  if (DataGridView1.SelectedRows.Count() > 0) Then
    Dim row As DataGridViewRow = DataGridView1.SelectedRows(0)
    If (Not row.IsNewRow) Then
      row.DataBoundItem.Delete
      ' You can also directly delete the row from the grids rows collection
      ' which will automatically map to the proper row in the table
      'DataGridView1.Rows.RemoveAt(row.Index)
    End If
  End If
End Sub

Answer 2

如果您只想删除单个选定的行

DataGridView1.CurrentRow.Delete()