Question

I tried to change the backcolor in a specific column when the cell value changed.
I didn’t find the method to do that and I don’t know how to do that.

ok —-> backcolor in green.
nok —-> backcolor in red.

thank you very much for your help.

private void timer2_Tick(object sender, EventArgs e)
{
    int count = 0;
    foreach (DataRow dr in ds.Tables[0].Rows)
    {
        String StartCourse = dr[0].ToString();
        string EndCourse = dr[1].ToString();
        DateTime SystemTime = Convert.ToDateTime(DateTime.Now);
        DateTime StartTime = Convert.ToDateTime(StartCourse);
        DateTime EndTime = Convert.ToDateTime(EndCourse);

        if (StartTime.TimeOfDay.Ticks <= SystemTime.TimeOfDay.Ticks && SystemTime.TimeOfDay.Ticks < EndTime.TimeOfDay.Ticks)
            {
                 ds.Tables[0].Rows[count][5] = "ok";      
            }

        else
            {
                ds.Tables[0].Rows[count][5] = "nok";
            }

        count++;
        dataGridView1.DataSource = ds.Tables[0];

    }
}

Answer 1

you can call this Procedure:

UPDATED

void ColorGrid()
{
     foreach (DataGridViewRow row in dataGridView1.Rows) 
     {
        if (row.Cells[5].Value.ToString() == "ok") 
        {
            row.DefaultCellStyle.BackColor = Color.Green; 
        }
        else
        {
            row.DefaultCellStyle.BackColor = Color.Red; 
        }
     }
}