【C#】.net 导出Excel功能

将DataSet对象导出成Excel文档

一、不带格式控制

void btnExport_Click(object sender, EventArgs e)
        {
            IList<string> fields = new List<string>();
            IList<string> headers = new List<string>();
            fields.Add("数据库字段名1");
            headers.Add("Excel字段名1");
            fields.Add("数据库字段名2");
            headers.Add("Excel字段名2");

            StringBuilder strFlag = new StringBuilder();
            foreach (string head in headers)
            {
                strFlag.Append(head + ",");
                if (head == headers[headers.Count - 1])
                {
                    strFlag = strFlag.Remove(strFlag.Length - 1, 1);
                    strFlag.Append("\r\n");
                }
            }

            DataSet dt = new DataSet();//从数据库获取到数据
            if (dt != null && dt.Tables[0].Rows.Count > 0)
            {
                foreach (DataRow row in dt.Tables[0].Rows)
                {
                    foreach (string field in fields)
                    {
                        strFlag.Append(row[field]).Append(",");
                        if (field == fields[headers.Count - 1])
                        {
                            strFlag = strFlag.Remove(strFlag.Length - 1, 1);
                            strFlag.Append("\r\n");
                        }
                    }
                }

                Page.Response.Clear();
                Page.Response.Buffer = false;
                Page.Response.Charset = "GB2312";

                Page.Response.AppendHeader("Content-Disposition", "attachment;filename=Excel文件名.csv");
                Page.Response.ContentType = "application/octet-stream";

                Page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
                Page.EnableViewState = false;
                Page.Response.Write(strFlag.ToString());
                Page.Response.End();
            }
        }
简洁版

 二、可控制导出格式(是目前.net导出excel最适合的解决方案)

//引用NPOI.dll
//using NPOI.HSSF.UserModel;
//using NPOI.HPSF;
//using NPOI.POIFS.FileSystem;
//using NPOI.SS.UserModel;

DataSet dt = new DataSet();//从数据库读取数据;

HSSFWorkbook workbook = new HSSFWorkbook();

ISheet sheet1 = workbook.CreateSheet("Sheet1");
workbook.CreateSheet("Sheet2");
workbook.CreateSheet("Sheet3");//一般Excel都有三个Sheet

HSSFRow row = (HSSFRow)sheet1.CreateRow(0);
row.CreateCell(0).SetCellValue("姓名");
row.CreateCell(1).SetCellValue("性别");
row.CreateCell(2).SetCellValue("年龄");

//样式,更多样式见文档
ICellStyle cellStyle_cny = workbook.CreateCellStyle();
IDataFormat format = workbook.CreateDataFormat();
//cellStyle_cny.DataFormat = format.GetFormat("¥#,##0.00;¥-#,##0.00");//价格样式
cellStyle_cny.Alignment = HorizontalAlignment.Center;//左右居中
cellStyle_cny.VerticalAlignment = VerticalAlignment.Center;//上下居中

if (dt != null && dt.Tables[0].Rows.Count > 0)
{
    for (int i = 0; i < dt.Tables[0].Rows.Count; i++)
    {
        row = (HSSFRow)sheet1.CreateRow(i + 1);

        row.CreateCell(0).SetCellValue(dt.Tables[0].Rows[i]["Name"].ToString());
        row.CreateCell(1).SetCellValue(dt.Tables[0].Rows[i]["Sex"].ToString());      row.CreateCell(2).SetCellValue(Convert.ToInt32(dt.Tables[0].Rows[i]["Age"]));

        row.GetCell(2).CellStyle = cellStyle_cny;//设置样式
    }

}

//sheet1.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(1,4,2,2)); //合并单元格,将第3列的第二行到第五行合并为一个单元格(下标从0开始)

//导出
System.IO.MemoryStream ms = new System.IO.MemoryStream();
workbook.Write(ms);
Page.Response.AddHeader("Content-Disposition", string.Format("attachment; filename=我的消费记录{0}.xls", DateTime.Now.ToString("yyyyMMddHHmmssfff")));
Page.Response.BinaryWrite(ms.ToArray());
workbook = null;
ms.Close();
ms.Dispose();
导出带样式的Excel

注:

1、NPOI.dll可到官网下载,或网上搜索下载。官网:http://npoi.codeplex.com/

2、关于NPOI是什么,以及相关文档,请浏览:http://blog.csdn.net/pan_junbiao/article/details/39717443

3、导出文件名如果是中文的话会出现乱码的解决方法:

//将中文名转码之后再加入文件头
string filename = HttpUtility.UrlEncode(System.Text.UTF8Encoding.UTF8.GetBytes("文件名.xls"));
Page.Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);

 

补充第二点,设置所导出的文档的详细信息,就是右击文件--属性--详细信息,所看到的信息

//代码为第二点的代码补充(一些变量在第二点中声明)
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "xx公司";
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Title = "说明标题1";
si.Subject = "主题1";
si.Comments = "备注1";
workbook.DocumentSummaryInformation = dsi;
workbook.SummaryInformation = si;
设置导出的Excel文档的详细信息

 

posted @ 2016-11-25 15:34  Doc.stu  阅读(1042)  评论(0编辑  收藏  举报