C#读取和导出到Excel简单实例

一、导出Excel

public enum ReportTemplateMode
{
    WebOrder,      
    WebOrderDetails,
    WebSend,
    WebSendDetails,
}


public class TemplateFileUtility
{
    public static string CreateTemplateFile(ReportTemplateMode model)
    {
        string filePath = HttpContext.Current.Server.MapPath("~/Template");
        string templateFile = string.Empty;
        string createFile = string.Empty;
        switch (model)
        {
            case ReportTemplateMode.WebOrder:
            case ReportTemplateMode.WebOrderDetails:
            case ReportTemplateMode.WebSend:
            case ReportTemplateMode.WebSendDetails:
                createFile = Guid.NewGuid() + ".xls";
                templateFile = Path.Combine(filePath, model.ToString() + ".xls");
                break;
            default:
                createFile = Guid.NewGuid() + ".xls";
                templateFile = Path.Combine(filePath, model.ToString() + ".xls");
                break;
        }

        createFile = Path.Combine(GetTempFile(), createFile);
        if (!File.Exists(templateFile))
        {
            throw new Exception("Find Not TemplateFile Path: " + templateFile);
        }
        File.Copy(templateFile, createFile, true);
        File.SetAttributes(createFile, FileAttributes.Normal);

        return createFile;
    }
    public static string GetTempFile()
    {
        string tempFile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Temp");
        if (!System.IO.Directory.Exists(tempFile))
        {
            System.IO.Directory.CreateDirectory(tempFile);
        }
        return tempFile;
    }

}



//点击"导出"按钮
protected void btn_Export_OnClick(object sender, EventArgs e)
{
    GC.Collect();

    string targetExcelFileName = TemplateFileUtility.CreateTemplateFile(ReportTemplateMode.WebOrder);
    OrderSearchFilter filter = GetFilter();
    DataTable dtbl = BizOrder.ExportOrderListByFilter(filter);

    //Excel模型，用来操作Excel文件
    Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
    Microsoft.Office.Interop.Excel.Workbook excelWb = null;
    Microsoft.Office.Interop.Excel.Worksheet excelWs = null;
    Microsoft.Office.Interop.Excel.Range cellR = null;
    try
    {
        //打开Excel工作簿文件                
        excelWb = excel.Workbooks.Open(targetExcelFileName, System.Type.Missing, false, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);
        excelWs = (Microsoft.Office.Interop.Excel.Worksheet)(excelWb.Sheets.get_Item(1));   //选择工作簿中第一个工作表

        //查询条件
        excelWs.Cells[2, 3] = this.txt_Keywords.Value;
        excelWs.Cells[3, 3] = GetSearchDate();
        excelWs.Cells[2, 12] = this.ddl_OrderState.SelectedIndex == 0 ? string.Empty : this.ddl_OrderState.SelectedItem.Text;
        excelWs.Cells[3, 12] = this.ddl_PayState.SelectedIndex == 0 ? string.Empty : this.ddl_PayState.SelectedItem.Text;
        excelWs.Cells[2, 14] = HttpContextUtility.CurrentAdminUser.Username;
        excelWs.Cells[3, 14] = DateTime.Now.ToString("yyyy-MM-dd HH:mm");


        //把每一行数据写入Excel模型中
        int startRow = 6;
        decimal numSource = 0, num = 0, settleAmount = 0, saleAmount = 0, expressAmount = 0;
        int i = 0;
        for (i = 0; i < dtbl.Rows.Count; i++)
        {
            cellR = excelWs.get_Range(excelWs.Cells[startRow + i, 1], excelWs.Cells[startRow + i, dtbl.Columns.Count]);
            cellR.Borders.Color = System.Drawing.ColorTranslator.ToOle(Color.Black);
            for (int j = 0; j < dtbl.Columns.Count; j++)
            {
                excelWs.Cells[startRow + i, j + 1] = dtbl.Rows[i][j].ToString();

                if (j == 4)
                {
                    numSource += decimal.Parse(dtbl.Rows[i][j].ToString());
                }
                else if (j == 5)
                {
                    num += decimal.Parse(dtbl.Rows[i][j].ToString());
                }
                else if (j == 6)
                {
                    settleAmount += decimal.Parse(dtbl.Rows[i][j].ToString());
                }
                else if (j == 7)
                {
                    saleAmount += decimal.Parse(dtbl.Rows[i][j].ToString());
                }
                else if (j == 8)
                {
                    expressAmount += decimal.Parse(dtbl.Rows[i][j].ToString());
                }
            }
        }
        excelWs.Cells[startRow + i, 4] = "合计：";
        excelWs.Cells[startRow + i, 5] = numSource.ToString("N2");
        excelWs.Cells[startRow + i, 6] = num.ToString("N2");
        excelWs.Cells[startRow + i, 7] = settleAmount.ToString("N2");
        excelWs.Cells[startRow + i, 8] = saleAmount.ToString("N2");
        excelWs.Cells[startRow + i, 9] = expressAmount.ToString("N2");
        cellR = excelWs.get_Range(excelWs.Cells[startRow + i, 4], excelWs.Cells[startRow + i, 9]);
        cellR.Font.Bold = true;

        excelWb.Save();
    }
    catch (Exception ex)
    {
        string info = ex.Message;
        Extensions.WriteLog("Order_List", "导出时发生异常：" + info);
    }
    finally
    {
        //关闭Excel，否则Excel文件将无法被打开
        excel.Workbooks.Close();
        excel.Quit();
    }

    //向客户端发送文件...
    Response.Clear();
    Response.AddHeader("Content-Disposition", "attachment;filename=excel.xls");     //设置回发内容为Excel
    Response.ContentType = "application/ms-excel";
    Response.WriteFile(targetExcelFileName);                                        //把刚刚生成的Excel文件写入Http流
    Response.End();
}

二、读取Excel文件

public static DataTable ReaderExcelData(string filePath)
{
    //创建Excel实例，获取worksheet Name  
    var oExcel = new Microsoft.Office.Interop.Excel.Application();
    object objMissing = System.Reflection.Missing.Value;
    var myBook = oExcel.Workbooks.Open(filePath, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing, objMissing);
    Microsoft.Office.Interop.Excel.Sheets sheets = myBook.Worksheets;
    var ws = (Microsoft.Office.Interop.Excel.Worksheet)sheets.Item[1];
    //获取工作簿名称
    string wsName = ws.Name;
    oExcel.Quit();
    //读取当前Excel的数据到DataTable中
    DataTable table = ReaderExcelData(filePath, wsName);
    return table;
}



public static DataTable ReaderExcelData(string filePath, string worksheetName)
{
    try
    {
        //连接字符串  
        String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + "Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";
        var myConn = new OleDbConnection(sConnectionString);
        string strCom = " SELECT * FROM [" + worksheetName + "$]";
        myConn.Open();
        var myCommand = new OleDbDataAdapter(strCom, myConn);
        var table = new DataTable();
        myCommand.Fill(table);
        myConn.Close();
        return table;
    }
    catch (Exception)
    {
        return null;
    }
    finally
    {
        try
        {
            //File.Delete(filePath);//返回数据后删除垃圾文件
        }
        catch
        {

        }
    }
}

三、MVC读取Excel文件

/*引用动态链接库文件：NPOI.dll,NPOI.OOXML.dll,NPOI.OpenXml4Net.dll,NPOI.OpenXmlFormats.dll*/
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.Util;
public ActionResult AliExpressOrderImport(HttpPostedFileBase filebase)
{
    HttpPostedFileBase file = Request.Files["excelFile"];
    string FileName = string.Empty;
    string SavePath = string.Empty;
    string errormsg = "无";
    if (file == null || file.ContentLength <= 0)
    {
        ViewBag.error = "文件不能为空";
        return View("Upload");
    }
    else
    {
        string filename = Path.GetFileName(file.FileName);
        int filesize = file.ContentLength;
        string fileSuf = Path.GetExtension(filename);//获取文件扩展名
        string filePre = Path.GetFileNameWithoutExtension(filename);//获取文件名称

        FileName = filePre + DateTime.Now.ToString("yyyyMMddhhmmss") + fileSuf;

        SavePath = AppDomain.CurrentDomain.BaseDirectory + "ExcelTemplete\\uploads\\" + FileName;
        file.SaveAs(SavePath);
    }

    List<Chiang.Entity.SCMV2DB.Country> listCountry = cmpdbuntility.Entities<Chiang.Entity.SCMV2DB.Country>("SELECT * FROM Country ").ToList();
    StringBuilder sb = new StringBuilder();
    string sellerID = Request["SellerID"];
    string insertSql = string.Empty;
    int intRow=0;
    try
    {
        IWorkbook HssWorkBook;
        using (FileStream fs = new FileStream(SavePath, FileMode.Open, FileAccess.Read))
        {
            HssWorkBook = new XSSFWorkbook(fs);
            ISheet sheet = HssWorkBook.GetSheetAt(0);
            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
            int num = 0;
            while (rows.MoveNext())
            {
                if (num == 0)
                {
                    num++;
                    continue;
                }
                IRow row = (XSSFRow)rows.Current;
                if (row.GetCell(0) == null && row.GetCell(1) == null)
                {
                    errormsg = "文件内容有异常，请检查第一行";
                    break;
                }
                else if (string.IsNullOrEmpty(row.GetCell(0).ToString()) && string.IsNullOrEmpty(row.GetCell(1).ToString()))
                {
                    errormsg = "首行首列不能为空";
                    break;
                }
                DataRow frow = cmpdbuntility.FirstRow("SELECT * FROM [dbo].[OrdersFromExcel] WHERE ORDERID={0} ", row.GetCell(1).ToString());
                if (frow != null)
                {
                    errormsg = "AliExpress订单: " + row.GetCell(1).ToString() + "已经上传过，不能重复上传.";
                    break;
                }
                string orderStatus = row.GetCell(1).ToString().Trim(); // 资金未到账/等待您发货/等待买家收货
                if (orderStatus != "等待您发货")
                {
                    continue;
                }

                string orderID = row.GetCell(0).ToString().Trim();
                string productInfo = row.GetCell(11).ToString();
                string countryName = row.GetCell(15).ToString().Trim();
                string countryCode = string.Empty;
                var country = listCountry.Where(t => t.English.Contains(countryName) || countryName.Contains(t.English)).FirstOrDefault();
                if (country != null)
                {
                    countryCode = country.Code;
                }
                else
                {
                    sb.Append("订单号：" + orderID + " 找不到对应的国家编号；");
                }
                insertSql = string.Format(@"INSERT INTO [dbo].[OrdersFromExcel]
                                       (OrderID,Status,Saler,Buyer_Name,Buyer_Email,OrderDate,PaydOn,TotalAmount,ShippingAmount,OrderAmount,DiscountAmount,ProductDetails,Remarks,
                                        Address1,ReceiverName,CountryName,Province,City,Address2,PostCode,Tel,Mobile,ShippingMethod,DeliveryLimitedDate,
                                        TrackingNumber,DeliveryDate,ConfirmDate,SellerID,CountryCode,SkuDetails,ProductAttribute,ImportDate)
                                 VALUES('{0}','{1}','{2}','{3}','{4}','{5}',case when '{6}'='' then NULL else '{6}' end,'{7}','{8}','{9}','{10}','{11}','{12}','{13}','{14}','{15}','{16}','{17}',NULL,'{18}','{19}','{20}','{21}',case when '{22}'='' then NULL else '{22}' end,NULL,NULL,NULL,'{23}','{24}','{25}','{26}',getdate())",
                            orderID,
                            orderStatus,
                            row.GetCell(2).ToString().Replace("'", "''"),
                            row.GetCell(3).ToString().Replace("'", "''"),
                            "[email protected]",     //row["买家邮箱"].ToString().Replace("'", "''"),
                            Convert.ToDateTime(row.GetCell(5).ToString()).ToString(),
                            row.GetCell(6).ToString() == "" ? "" : Convert.ToDateTime(row.GetCell(6).ToString()).ToString(),
                            row.GetCell(7).ToString(),
                            row.GetCell(8).ToString(),
                            row.GetCell(9).ToString(),
                            row.GetCell(10).ToString() == "" ? "0" : row.GetCell(10).ToString(),
                            row.GetCell(11).ToString().Replace("'", "''"),
                            row.GetCell(12).ToString().Replace("'", "''"),  //Remarks
                            row.GetCell(13).ToString().Replace("'", "''"),  //收货地址
                            row.GetCell(14).ToString().Replace("'", "''"),  //
                            countryName.Replace("'", "''"),
                            row.GetCell(16).ToString().Replace("'", "''"),
                            row.GetCell(17).ToString().Replace("'", "''"),                                    
                            row.GetCell(19).ToString().Replace("'", "''"),
                            row.GetCell(20).ToString().Replace("'", "''"),
                            row.GetCell(21).ToString().Replace("'", "''"),
                            row.GetCell(22).ToString().Replace("'", "''"),
                            row.GetCell(23).ToString() == "" ? "" : Convert.ToDateTime(row.GetCell(23).ToString()).ToString(),
                            sellerID,
                            countryCode,
                            skuDetials.ToString(),
                            productAttribute
                             );

                var succ = cmpdbuntility.NonQuery(insertSql);
                if (succ > 0)
                {
                    intRow++;
                }
            }
        }
        ViewBag.error = "AliExpress导入成功" + intRow + "个订单；"+sb.ToString();
        System.IO.File.Delete(SavePath);
    }
    catch (Exception ex)
    {
        ViewBag.error = "AliExpress导入成功" + intRow.ToString() + "个订单；异常信息：" + ex.Message + "。更多：" + insertSql + " ，" + sb.ToString();
    }
    return View("Upload");           
}