dgv对检查相同的IP并标颜色

    datagridview中要实现下面的效果，如何处理？

 

private string[] mColorArray = new string[]
      {
          "#ff0000","#9933ff","#0000ff","#9900ff","#ff6600", "#cc3333","#006600",
      };
      private void dataGridView1_Sorted(object sender, EventArgs e)
      {
          if (dataGridView1.Rows.Count == 0)
              return;
          if (dataGridView1.SortedColumn.Index == FIP.Index)
          {
              string lastIp = string.Empty;
              string tmpIp = string.Empty;
              int colorIndex = 0;
              for (int iRow = 0; iRow < dataGridView1.Rows.Count; iRow++)
              {
                  tmpIp = dataGridView1.Rows[iRow].Cells[FIP.Index].Value.ToString();
                  if (iRow + 1 < dataGridView1.Rows.Count)
                  {
                      if (tmpIp.Equals(dataGridView1.Rows[iRow + 1].Cells[FIP.Index].Value.ToString()))
                      {
                          if (!tmpIp.Equals(lastIp))
                              colorIndex++;
                          dataGridView1.Rows[iRow].DefaultCellStyle.ForeColor = System.Drawing.ColorTranslator.FromHtml(mColorArray[colorIndex%7]);
                          dataGridView1.Rows[iRow + 1].DefaultCellStyle.ForeColor = dataGridView1.Rows[iRow].DefaultCellStyle.ForeColor;
                          lastIp = dataGridView1.Rows[iRow + 1].Cells[FIP.Index].Value.ToString();
                      }
                  }
              }
          }
          else
          {
              for (int iRow = 0; iRow < dataGridView1.Rows.Count; iRow++)
                  dataGridView1.Rows[iRow].DefaultCellStyle.ForeColor = Color.Black;
          }
      }

    这样写的结果是，点击单元号列则按单元号列排序，并恢复单元号列的字体颜色；点击IP列，则按IP排序，且按颜色标出相同IP。