string file = @"E:\test.xls";            //测试文件
            Excel.Application excel = null;
            Excel.Workbook wkb = null;
            try
            {
                excel = new Excel.Application();
                wkb = excel.Workbooks.Open(file);
                Excel.Sheets sheets = wkb.Worksheets;
                Excel.Worksheet sheet = null;
                if (sheets.Count > 0)
                    sheet = sheets[1] as Excel.Worksheet;       //这里读取的是第一个sheet，注意：这里第一个sheet的index为1
                Excel.Range range = null;
                if (sheet != null)
                    range = sheet.get_Range("A1");
                string A1 = String.Empty;
                if (range != null)
                    A1 = range.Text.ToString();
                Color color1 = System.Drawing.ColorTranslator.FromOle(Convert.ToInt32(range.Font.Color));
                Response.Write(string.Format("A1 value: {0} ForeColor:{1}", A1, color1.ToString()));    //输出A1的值和前景色

                range = null;
                if (sheet != null)
                    range = sheet.get_Range("A2");
                string A2 = String.Empty;
                if (range != null)
                    A2 = range.Text.ToString();
                Color color2 = System.Drawing.ColorTranslator.FromOle(Convert.ToInt32(range.Interior.Color));
                Response.Write(string.Format("A2 value: {0} Backcolor:{1}", A2, color2));        //输出A2的值和背景色
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
            }
            finally
            {
                if (wkb != null)
                {
                    wkb.Close();
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(wkb);
                }
                if (excel != null)
                {
                    excel.Quit();
                    System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
                }
            }