如何使用单元格颜色将datagridview导出为Excel C＃

Question

我的图片上似乎有一个datagridview。我正在使用Windows窗体应用程序。我的某些行背景是红色的，所以我想将datagridview导出到excel。

           我尝试了这段代码；

 Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
            excel.Visible = true;
            object Missing = Type.Missing;
            Microsoft.Office.Interop.Excel.Workbook workbook = excel.Workbooks.Add(Missing);
            Microsoft.Office.Interop.Excel.Worksheet sheet1 = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Sheets[1];
            int StartCol = 1;
            int StartRow = 1;
            for (int j = 0; j < dataGridView1.Columns.Count; j++)
            {
                Microsoft.Office.Interop.Excel.Range myRange = (Microsoft.Office.Interop.Excel.Range)sheet1.Cells[StartRow, StartCol + j];
                myRange.Value2 = dataGridView1.Columns[j].HeaderText;
            }
            StartRow++;
            for (int i = 0; i < dataGridView1.Rows.Count; i++)
            {
                for (int j = 0; j < dataGridView1.Columns.Count; j++)
                {
                    try
                    {
                        DataGridViewCell cell = dataGridView1[j, i];
                        sheet1.Cells[i + 2, j + 1] = cell.Value;
                    }
                    catch
                    {
                        MessageBox.Show("error");
                    }
                } 
            }

此代码导出正确，但是我不知道如何在红色背景下导出