vb.net for each loop that compares a row to every other row

Question

I am trying to format some datagridview rows based on comparing them with other rows.

Here is the code I have so far.

    For Each row As DataGridViewRow         


        

Answer 1

You need an inner For Loop if you want to have each item (row) iterated through and compare itself vs every other item in the list (grid).

For Each rowOuter As DataGridViewRow In DaisyServicesForm.DataGridView1.Rows
    For Each rowInner As DataGridViewRow In DaisyServicesForm.DataGridView1.Rows
        If rowOuter.Cells("UnitCost").Value = rowInner.Cells("UnitCost").Value And 
            (rowOuter.Cells("FromDate").Value <= rowInner.Cells("ToDate").Value And rowOuter.Cells("ToDate").Value >= rowInner.Cells("FromDate").Value) Then
            rowOuter.DefaultCellStyle.ForeColor = Color.Blue
    End If
    Next
Next

• The first outer row will compare itself to all rows.
• The next outer row will compare itself to to all rows.
• ...
• The final row will compare itself to all rows.

You probably need to check the if statement I have there, but the idea should work. Also, you need to add a check so see if it the row is checking itself.