Excel Interior.ColorIndex色彩列表

 Microsoft.Office.Interop.Excel.Range range;

  for (int i = ; i < dt.Columns.Count; i++)
         {
             worksheet.Cells[, i + ] = dt.Columns[i].ColumnName;
             range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[, i + ];
             //设置区域背景色
             range.Interior.ColorIndex = ;
         }