Private Sub DataGridView1_Validated(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DataGridView1.Validated
For i As Integer = 0 To DataGridView1.Rows.Count - 1
For j As Integer = i + 1 To DataGridView1.Rows.Count - 1
If DataGridView1.Rows(i).Cells(1).Value = DataGridView1.Rows(j).Cells(1).Value Then
MsgBox("Duplicate: " & DataGridView1.Rows(j).Cells(1).Value)
i think it will give you a "duplicate" message if column cardNumber has same value. try it
Need some help with this Array. I am trying to get the sum of the even numbers and the sum of the odd numbers using a for each loop. I know the answers to what I am trying to achive are sum of even = 84 and the sum of ...
I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...