change row colour in datagridview based on some condition

[Rachna0309]

I have datagridview which is populated with 3 columns partno,locality,houseno. Initially my row colour would be say light blue. Now what i want is whenever houseno changes in row,its row colour should be changed to say grey. That means whenever houseno changes,these two colours should be alternately applied to rows of grid.
For example,values that would be populated in houseno column will be
0
0
1
1
2
etc.Now for row with houseno 0 will have row colour as light blue ,for houseno 1 will have row colour grey,for houseno 2 again light blue and so on.
Can any1 help me with this.
Thanks in advance.

[adam_k]

Try something like:

    Dim last_value As String = ""
    Dim last_color As Color = Color.LightBlue

    If DataGridView1.Rows.Count > 0 Then
        For Each row In DataGridView1.Rows

            If DataGridView1.Item("houseno", row.index).Value <> last_value Then
                If last_color = Color.LightBlue Then
                    DataGridView1.Rows(row.index).DefaultCellStyle.BackColor = Color.LightGray
                Else
                    DataGridView1.Rows(row.index).DefaultCellStyle.BackColor = Color.LightBlue
                End If
            Else
                DataGridView1.Rows(row.index).DefaultCellStyle.BackColor = last_color
            End If

            If DataGridView1.Rows(row.index).IsNewRow = False Then
                last_value = DataGridView1.Item("houseno", row.index).Value.ToString
                last_color = DataGridView1.Rows(row.index).DefaultCellStyle.BackColor
            End If

        Next

    End If

[Reverend Jim]

Make all cells in row 1 blue.

For Each c As DataGridViewCell In DataGridView1.Rows(1).Cells
        c.Style.BackColor = Color.Blue
Next

[Rachna0309]

Thanks..problem is solved.