同一值标识同一颜色

 1 dataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.White;
 2             Color tempColor = Color.AntiqueWhite;
 3             bool b = true;//标示
 4             for (int j = 1; j < dataGridView1.Rows.Count; j++)
 5             {
 6                 if (dataGridView1.Rows[j].Cells[1].Value.ToString() == dataGridView1.Rows[j - 1].Cells[1].Value.ToString())
 7                 {
 8                     dataGridView1.Rows[j].DefaultCellStyle.BackColor = dataGridView1.Rows[j - 1].DefaultCellStyle.BackColor;
 9                 }
10                 else
11                 {
12                     if (b)
13                     {
14                         dataGridView1.Rows[j].DefaultCellStyle.BackColor = tempColor;
15                         tempColor = Color.White;
16                         b = false;
17                     }
18                     else
19                     {
20                         dataGridView1.Rows[j].DefaultCellStyle.BackColor = tempColor;
21                         tempColor = Color.AntiqueWhite;
22                         b = true;
23                     }
24                 }
25             }