winform中改变DataGridView中符合条件的字体的颜色

在设计框架的时候，把QTP Report中的运行结果状态根据结果显示为不同的颜色：

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e) 
       { 
           if (e.RowIndex < 0) 
               return; 
 
           if (e.ColumnIndex == dataGridView1.Columns["CaseStatus"].Index) 
           { 
               if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() == "Passed") 
               { 
                   e.CellStyle.ForeColor = Color.Green; 
               } 
               else if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() == "Failed") 
               { 
                   e.CellStyle.ForeColor = Color.Red; 
               } 
               else if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() == "Warning") 
               { 
                   e.CellStyle.ForeColor = Color.Goldenrod; 
               } 
               else if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() == "No Run") 
               { 
                   e.CellStyle.ForeColor = Color.Gray; 
               } 
           } 
       }