用NPOI、C#操作Excel表格生成班级成绩单
转：https://blog.csdn.net/dcrmg/article/details/52374194#commentBox
在C#中利用NPOI操作Excel表格非常方便，几乎上支持所有的Excel表格本身所有的功能，如字体设置、颜色设置、单元格合并、数值计算、页眉页脚等等。
这里准备使用NPOI生成一个班级成绩单Excel表格，表格中包含的信息包括学号、姓名、各科成绩、平均成绩、排名等。
实现原理很简单，主要是NPOI的一些操作，具体实现的功能包括下边几个：
- 单元格合并
- 字体大小、颜色设置
- 背景颜色设置
- 边框粗细设置
- 多个单元格SUM求和
- 数据写入和读取
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using NPOI.HSSF.UserModel; using NPOI.XSSF.UserModel; using NPOI.SS.UserModel; using System.IO; using System.Data; namespace Score_Excel { class Program { static void Main(string[] args) { IWorkbook workbook = new HSSFWorkbook();//声明工作簿对象，可以创建xls或xlsx Excel文件 ISheet sheet1 = workbook.CreateSheet("Score Record"); //创建工作表 ICell sheet1Title = sheet1.CreateRow(0).CreateCell(0); //创建第一行第一个单元格 sheet1Title.SetCellValue("国家体育总局附属二小幼儿园小一班体育成绩表"); //表头 sheet1Title.CellStyle = GetTitleCellStyle(workbook); sheet1.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, 9)); //合并单元格 DataTable dt = GetData(); IRow row; ICell cell; ICellStyle cellStyle1 = GetCellStyle(workbook, 2); ICellStyle cellStyle2 = GetCellStyle(workbook, 0); double[] aveScore = new double[8]; //平均成绩数组 int[] rankNum = new int[8]; //名次数组 //表头数据 row = sheet1.CreateRow(1); cell = row.CreateCell(0); cell.SetCellValue("学号"); cell.CellStyle = cellStyle1; cell = row.CreateCell(1); cell.SetCellValue("姓名"); cell.CellStyle = cellStyle1; cell = row.CreateCell(2); cell.SetCellValue("排球"); cell.CellStyle = cellStyle1; cell = row.CreateCell(3); cell.SetCellValue("乒乓球"); cell.CellStyle = cellStyle1; cell = row.CreateCell(4); cell.SetCellValue("跳水"); cell.CellStyle = cellStyle1; cell = row.CreateCell(5); cell.SetCellValue("举重"); cell.CellStyle = cellStyle1; cell = row.CreateCell(6); cell.SetCellValue("自由泳"); cell.CellStyle = cellStyle1; cell = row.CreateCell(7); cell.SetCellValue("体操"); cell.CellStyle = cellStyle1; cell = row.CreateCell(8); cell.SetCellValue("平均成绩"); cell.CellStyle = cellStyle1; cell = row.CreateCell(9); cell.SetCellValue("名次"); cell.CellStyle = cellStyle1; // 写入数据 for (int i = 0; i < dt.Rows.Count; i++) { DataRow dataR = dt.Rows[i]; row = sheet1.CreateRow(i + 2); cell = row.CreateCell(0); cell.SetCellValue(dataR["学号"].ToString()); cell.CellStyle = cellStyle2; cell = row.CreateCell(1); cell.SetCellValue(dataR["姓名"].ToString()); cell.CellStyle = cellStyle2; cell = row.CreateCell(2); cell.SetCellValue((Double)dataR["排球"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(3); cell.SetCellValue((Double)dataR["乒乓球"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(4); cell.SetCellValue((Double)dataR["跳水"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(5); cell.SetCellValue((Double)dataR["举重"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(6); cell.SetCellValue((Double)dataR["自由泳"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(7); cell.SetCellValue((Double)dataR["体操"]); cell.CellStyle = cellStyle2; cell = row.CreateCell(8); cell.SetCellFormula(String.Format("SUM($C{0}:$H{0})/6", i + 3)); cell.CellStyle = cellStyle2; for (int j = 2; j < 8; j++) { aveScore[i] += row.Cells[j].NumericCellValue; } aveScore[i] /= 6; //每个人平均成绩 } //以下for循环实现对每个人的成绩进行排名 for (int i = 0; i < 8; i++) { rankNum[i] = 1; for (int j = 0; j < 8; j++) { if (aveScore[i] < aveScore[j]) { rankNum[i]++; } } } //排名写入“名次”列 for (int i = 0; i < 8; i++) { row = sheet1.GetRow(i + 2); cell = row.CreateCell(9); cell.SetCellValue(rankNum[i]); cell.CellStyle = cellStyle2; } if (!Directory.Exists(@"E:\Score Excel")) //检查是否存在文件夹，不存在则新建 { Directory.CreateDirectory(@"E:\Score Excel"); } FileStream file = new FileStream(@"E:\Score Excel\Score Record.xls", FileMode.Create); workbook.Write(file); file.Close(); workbook.Close(); } static DataTable GetData() //原始数据 { DataTable dt = new DataTable(); dt.Columns.Add("学号", typeof(System.Int32)); dt.Columns.Add("姓名", typeof(System.String)); dt.Columns.Add("排球", typeof(System.Double)); dt.Columns.Add("乒乓球", typeof(System.Double)); dt.Columns.Add("跳水", typeof(System.Double)); dt.Columns.Add("举重", typeof(System.Double)); dt.Columns.Add("自由泳", typeof(System.Double)); dt.Columns.Add("体操", typeof(System.Double)); dt.Rows.Add("231603001", "张继科", 100, 83, 69.5, 90, 61, 92); dt.Rows.Add("231603002", "傅园慧", 99, 100, 99.9, 100, 100, 99.5); dt.Rows.Add("231603003", "孙杨", 92, 64, 78.5, 64, 69, 90.5); dt.Rows.Add("231603004", "福原爱", 76, 93.5, 69.5, 85, 87, 61); dt.Rows.Add("231603005", "大魔王", 99, 102, 92, 78, 96.5, 89.5); dt.Rows.Add("231603006", "林丹", 87, 98.5, 78.5, 69.5, 97, 89); dt.Rows.Add("231603007", "丁宁", 85, 93, 87.5, 90.5, 69, 79.5); dt.Rows.Add("231603008", "宁泽涛", 79, 62.5, 87.5, 98, 78, 93.5); return dt; } //设置单元格格式函数，边框粗细3个可选 static ICellStyle GetCellStyle(IWorkbook workbook, int borderThickness) { ICellStyle cellStyle = workbook.CreateCellStyle(); NPOI.SS.UserModel.BorderStyle borderType; switch (borderThickness) { case 0: borderType = NPOI.SS.UserModel.BorderStyle.Thin; break; case 1: borderType = NPOI.SS.UserModel.BorderStyle.Medium; break; case 2: borderType = NPOI.SS.UserModel.BorderStyle.Thick; break; default: borderType = NPOI.SS.UserModel.BorderStyle.Thin; break; } cellStyle.BorderBottom = borderType; cellStyle.BorderTop = borderType; cellStyle.BorderLeft = borderType; cellStyle.BorderRight = borderType; IFont font = workbook.CreateFont();//设置字体大小和颜色 font.FontName = "宋体"; font.FontHeightInPoints = 13; cellStyle.SetFont(font); return cellStyle; } //设置表头格式函数 static ICellStyle GetTitleCellStyle(IWorkbook workbook) { ICellStyle cell1Style = workbook.CreateCellStyle(); cell1Style.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; cell1Style.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; cell1Style.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin; cell1Style.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin; cell1Style.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin; cell1Style.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin; IFont font = workbook.CreateFont(); //设置字体大小和颜色 font.FontName = "微软雅黑"; font.FontHeightInPoints = 13; font.Color = NPOI.HSSF.Util.HSSFColor.Blue.Index; cell1Style.SetFont(font); cell1Style.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.LightGreen.Index; cell1Style.FillPattern = FillPattern.SolidForeground; return cell1Style; } } }
执行后，在E盘指定目录下生成了名字是“Score Excel”的表格：
“名次”列的排名实现：
先声明了一个大小为8的Int数组，默认值设为1，依次拿当前的平均成绩和其他7个的平均成绩对比，有几个大于当前平均成绩的元素，就在当前数组值上加上几，最后得到的就是每个人的排名，实现如下：
//以下for循环实现对每个人的成绩进行排名 for (int i = 0; i < 8; i++) { rankNum[i] = 1; for (int j = 0; j < 8; j++) { if (aveScore[i] < aveScore[j]) { rankNum[i]++; } } }
// NPOI excel 流导出
public void ExportMNewReportExcel(int org_info_id, string user_name, string declare_month, string customer_name, string ufsoft_account)
{
HSSFWorkbook hssfworkbook = new HSSFWorkbook();
//Excel文件的摘要信息
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "blog.csdn.net";
hssfworkbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Subject = "Export Excel";
hssfworkbook.SummaryInformation = si;
//列名
ISheet sheet1 = hssfworkbook.CreateSheet("Sheet1");
IRow row0 = sheet1.CreateRow(0);
row0.CreateCell(0).SetCellValue("客户名称");
row0.CreateCell(4).SetCellValue("基本税种");
row0.CreateCell(5).SetCellValue("征收方式");
row0.CreateCell(11).SetCellValue("税号");
row0.CreateCell(12).SetCellValue("税局");
row0.CreateCell(13).SetCellValue("专管员");
row0.CreateCell(14).SetCellValue("业务员");
//list = rep.GetList(org_info_id, "", pageIndex, pageSize, out total,param);
// var am = new AmArchStockRepository().GetList().Where(x => x.location_no == user_name).ToList();
// resultList = list.Select(r => new
// {
// data = r,
// flag = am.Where(x => x.customer_info_id == r.customer_info_id).Count() > 0 ? "是" : "否"
// });
IQueryable<CmCustomerInfo> queryable = null;
var cm_rep = new CmCustomerInfoRepository();
if (!string.IsNullOrEmpty(declare_month))
{
queryable = cm_rep.GetList(x => x.org_info_id == org_info_id && x.declare_month == declare_month, includeProperties: "SmUser2");
}
if (!string.IsNullOrEmpty(customer_name))
{
queryable = queryable.Where(x => x.customer_name.Contains(customer_name));
}
if (!string.IsNullOrEmpty(ufsoft_account))
{
queryable = queryable.Where(x => x.ufsoft_account.Contains(ufsoft_account));
}
var list = queryable.ToList();
var am_list = new AmArchStockRepository().GetList().Where(x => x.location_no == user_name ).ToList();
if (list != null && list.Count > 0)
{
int index = 0;
foreach (var item in list)
{
index++;
IRow excelRow = sheet1.CreateRow(index);
excelRow.CreateCell(0).SetCellValue(item.customer_name);
string isOrfalse = am_list.Where(x => x.customer_info_id == item.customer_info_id).Count() > 0 ? "是" : "否";
excelRow.CreateCell(1).SetCellValue(isOrfalse);
excelRow.CreateCell(2).SetCellValue(item.ufsoft_account);
excelRow.CreateCell(3).SetCellValue(item.declarer_machine);
excelRow.CreateCell(4).SetCellValue(item.tax_type);
excelRow.CreateCell(5).SetCellValue(item.tax_levy_method);
excelRow.CreateCell(6).SetCellValue(item.accounting_category);
excelRow.CreateCell(7).SetCellValue(item.enterprise_type);
excelRow.CreateCell(8).SetCellValue(item.tax_invoice_method);
excelRow.CreateCell(9).SetCellValue(item.bank_bill_method);
excelRow.CreateCell(10).SetCellValue(item.personnel_agency);
excelRow.CreateCell(11).SetCellValue(item.tax_code);
excelRow.CreateCell(12).SetCellValue(item.tax_bureau);
excelRow.CreateCell(13).SetCellValue(item.tax_contact);
excelRow.CreateCell(14).SetCellValue(item.sales_name);
}
//设置excel单元格的宽度 1*256代表一个字符
sheet1.SetColumnWidth(0, 30 * 256);
sheet1.SetColumnWidth(1, 12 * 256);
sheet1.SetColumnWidth(2, 13 * 256);
sheet1.SetColumnWidth(3, 10 * 256);
sheet1.SetColumnWidth(4, 15 * 256);
sheet1.SetColumnWidth(5, 10 * 256);
sheet1.SetColumnWidth(6, 10 * 256);
sheet1.SetColumnWidth(7, 10 * 256);
sheet1.SetColumnWidth(8, 20 * 256);
sheet1.SetColumnWidth(9, 20 * 256);
sheet1.SetColumnWidth(10, 20 * 256);
sheet1.SetColumnWidth(11, 20 * 256);
sheet1.SetColumnWidth(12, 20 * 256);
sheet1.SetColumnWidth(13, 20 * 256);
sheet1.SetColumnWidth(14, 20 * 256);
MemoryStream ms = new MemoryStream();
hssfworkbook.Write(ms);
//asp.net输出的Excel文件名
//如果文件名是中文的话，需要进行编码转换，否则浏览器看到的下载文件是乱码。
string fileName = HttpUtility.UrlEncode(string.Format("{0}_{1}"
, "月新报表"
, DateTime.Now.ToString("yyyyMMddhhmmss") + ".xls"));
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.Buffer = true;
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";
//Response.ContentType = "application/download"; //也可以设置成download
HttpContext.Current.Response.Charset = Encoding.UTF8.BodyName;
HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", fileName));
HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
HttpContext.Current.Response.BinaryWrite(ms.GetBuffer());
HttpContext.Current.Response.End();
}
}
