377 lines
17 KiB
C#
377 lines
17 KiB
C#
using NPOI.HSSF.UserModel;
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using NPOI.HSSF.Util;
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using NPOI.SS.UserModel;
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using NPOI.SS.Util;
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using NPOI.XSSF.UserModel;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Web.Hosting;
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namespace Epost.Common
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{
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public class ExcelHelper
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{
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#region 导出
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/// <summary>
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///
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/// </summary>
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/// <param name="resultMsg">导出结果</param>
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/// <param name="excelFilePath">保存excel文件路径</param>
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/// <param name="table"></param>
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/// <param name="filename"></param>
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/// <param name="filetitle"></param>
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/// <param name="WebRootPath"></param>
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/// <returns></returns>
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public bool ExcelDataExport(DataTable table, string filename, string filetitle, string WebRootPath, out string resultMsg, out string excelFilePath)
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{
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var result = true;
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excelFilePath = "";
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resultMsg = "successfully";
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//Excel导出名称
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try
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{
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//首先创建Excel文件对象
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var workbook = new HSSFWorkbook();
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//创建工作表，也就是Excel中的sheet，给工作表赋一个名称(Excel底部名称)
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var sheet = workbook.CreateSheet(filename);
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//sheet.DefaultColumnWidth = 20;//默认列宽
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sheet.ForceFormulaRecalculation = true;//TODO:是否开始Excel导出后公式仍然有效（非必须）
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//设置顶部大标题样式
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var cellStyleFont = CreateStyle(workbook, HorizontalAlignment.Center, VerticalAlignment.Center, 20, true, 700, "楷体", true, false, false, true, FillPattern.SolidForeground, HSSFColor.White.Index, HSSFColor.Black.Index,
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FontUnderlineType.None, FontSuperScript.None, false);
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//第一行表单
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IRow row = CreateRow(sheet, 0, 28);
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var cell = row.CreateCell(0);
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sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, table.Columns.Count - 1));
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cell.SetCellValue(filetitle);//合并单元格后，只需对第一个位置赋值即可（TODO:顶部标题）
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cell.CellStyle = cellStyleFont;
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//处理表格列头
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row = sheet.CreateRow(1);
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for (int i = 0; i < table.Columns.Count; i++)
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{
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row.CreateCell(i).SetCellValue(table.Columns[i].ColumnName);
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row.Height = 350;
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sheet.AutoSizeColumn(i);
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}
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//处理数据内容
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for (int i = 0; i < table.Rows.Count; i++)
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{
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row = sheet.CreateRow(2 + i);
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row.Height = 250;
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for (int j = 0; j < table.Columns.Count; j++)
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{
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row.CreateCell(j).SetCellValue(table.Rows[i][j].ToString());
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sheet.SetColumnWidth(j, 256 * 15);
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}
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}
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string folder = DateTime.Now.ToString("yyyyMMdd");
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//保存文件到静态资源文件夹中（wwwroot）,使用绝对路径
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var uploadPath = WebRootPath + "/File/" + folder + "/";
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//excel保存文件名
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string excelFileName = filename + "_" + DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
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//创建目录文件夹
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if (!Directory.Exists(uploadPath))
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{
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Directory.CreateDirectory(uploadPath);
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}
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//Excel的路径及名称
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string excelPath = uploadPath + excelFileName;
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//使用FileStream文件流来写入数据（传入参数为：文件所在路径，对文件的操作方式，对文件内数据的操作）
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var fileStream = new FileStream(excelPath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
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//向Excel文件对象写入文件流，生成Excel文件
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workbook.Write(fileStream);
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//关闭文件流
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fileStream.Close();
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//释放流所占用的资源
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fileStream.Dispose();
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//excel文件保存的相对路径，提供前端下载
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var relativePositioning = "/File/" + folder + "/" + excelFileName;
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excelFilePath = relativePositioning;
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}
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catch (Exception e)
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{
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result = false;
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resultMsg = e.Message;
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}
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return result;
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}
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/// <summary>
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/// 行内单元格常用样式设置
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/// </summary>
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/// <param name="workbook">Excel文件对象</param>
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/// <param name="hAlignment">水平布局方式</param>
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/// <param name="vAlignment">垂直布局方式</param>
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/// <param name="fontHeightInPoints">字体大小</param>
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/// <param name="isAddBorder">是否需要边框</param>
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/// <param name="boldWeight">字体加粗 (None = 0,Normal = 400，Bold = 700</param>
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/// <param name="fontName">字体（仿宋，楷体，宋体，微软雅黑...与Excel主题字体相对应）</param>
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/// <param name="isAddBorderColor">是否增加边框颜色</param>
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/// <param name="isItalic">是否将文字变为斜体</param>
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/// <param name="isLineFeed">是否自动换行</param>
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/// <param name="isAddCellBackground">是否增加单元格背景颜色</param>
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/// <param name="fillPattern">填充图案样式(FineDots 细点，SolidForeground立体前景，isAddFillPattern=true时存在)</param>
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/// <param name="cellBackgroundColor">单元格背景颜色（当isAddCellBackground=true时存在）</param>
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/// <param name="fontColor">字体颜色</param>
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/// <param name="underlineStyle">下划线样式（无下划线[None],单下划线[Single],双下划线[Double],会计用单下划线[SingleAccounting],会计用双下划线[DoubleAccounting]）</param>
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/// <param name="typeOffset">字体上标下标(普通默认值[None],上标[Sub],下标[Super]),即字体在单元格内的上下偏移量</param>
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/// <param name="isStrikeout">是否显示删除线</param>
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/// <returns></returns>
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public HSSFCellStyle CreateStyle(HSSFWorkbook workbook, HorizontalAlignment hAlignment, VerticalAlignment vAlignment, short fontHeightInPoints, bool isAddBorder, short boldWeight, string fontName = "宋体", bool isAddBorderColor = true, bool isItalic = false, bool isLineFeed = false, bool isAddCellBackground = false, FillPattern fillPattern = FillPattern.NoFill, short cellBackgroundColor = HSSFColor.Yellow.Index, short fontColor = HSSFColor.Black.Index, FontUnderlineType underlineStyle =
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FontUnderlineType.None, FontSuperScript typeOffset = FontSuperScript.None, bool isStrikeout = false)
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{
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HSSFCellStyle cellStyle = (HSSFCellStyle)workbook.CreateCellStyle(); //创建列头单元格实例样式
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cellStyle.Alignment = hAlignment; //水平居中
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cellStyle.VerticalAlignment = vAlignment; //垂直居中
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cellStyle.WrapText = isLineFeed;//自动换行
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//背景颜色，边框颜色，字体颜色都是使用 HSSFColor属性中的对应调色板索引，关于 HSSFColor 颜色索引对照表，详情参考：https://www.cnblogs.com/Brainpan/p/5804167.html
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//TODO：引用了NPOI后可通过ICellStyle 接口的 FillForegroundColor 属性实现 Excel 单元格的背景色设置，FillPattern 为单元格背景色的填充样式
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//TODO:十分注意，要设置单元格背景色必须是FillForegroundColor和FillPattern两个属性同时设置，否则是不会显示背景颜色
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if (isAddCellBackground)
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{
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cellStyle.FillForegroundColor = cellBackgroundColor;//单元格背景颜色
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cellStyle.FillPattern = fillPattern;//填充图案样式(FineDots 细点，SolidForeground立体前景)
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}
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//是否增加边框
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if (isAddBorder)
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{
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//常用的边框样式 None(没有),Thin(细边框，瘦的),Medium(中等),Dashed(虚线),Dotted(星罗棋布的),Thick(厚的),Double(双倍),Hair(头发)[上右下左顺序设置]
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cellStyle.BorderBottom = BorderStyle.Thin;
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cellStyle.BorderRight = BorderStyle.Thin;
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cellStyle.BorderTop = BorderStyle.Thin;
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cellStyle.BorderLeft = BorderStyle.Thin;
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}
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//是否设置边框颜色
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if (isAddBorderColor)
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{
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//边框颜色[上右下左顺序设置]
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cellStyle.TopBorderColor = HSSFColor.DarkGreen.Index;//DarkGreen(黑绿色)
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cellStyle.RightBorderColor = HSSFColor.DarkGreen.Index;
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cellStyle.BottomBorderColor = HSSFColor.DarkGreen.Index;
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cellStyle.LeftBorderColor = HSSFColor.DarkGreen.Index;
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}
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/**
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* 设置相关字体样式
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*/
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var cellStyleFont = (HSSFFont)workbook.CreateFont(); //创建字体
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//假如字体大小只需要是粗体的话直接使用下面该属性即可
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//cellStyleFont.IsBold = true;
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cellStyleFont.Boldweight = boldWeight; //字体加粗
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cellStyleFont.FontHeightInPoints = fontHeightInPoints; //字体大小
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cellStyleFont.FontName = fontName;//字体（仿宋，楷体，宋体 ）
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cellStyleFont.Color = fontColor;//设置字体颜色
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cellStyleFont.IsItalic = isItalic;//是否将文字变为斜体
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cellStyleFont.Underline = underlineStyle;//字体下划线
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cellStyleFont.TypeOffset = typeOffset;//字体上标下标
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cellStyleFont.IsStrikeout = isStrikeout;//是否有删除线
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cellStyle.SetFont(cellStyleFont); //将字体绑定到样式
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return cellStyle;
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}
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/// <summary>
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/// TODO:先创建行，然后在创建对应的列
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/// 创建Excel中指定的行
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/// </summary>
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/// <param name="sheet">Excel工作表对象</param>
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/// <param name="rowNum">创建第几行(从0开始)</param>
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/// <param name="rowHeight">行高</param>
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public HSSFRow CreateRow(ISheet sheet, int rowNum, float rowHeight)
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{
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HSSFRow row = (HSSFRow)sheet.CreateRow(rowNum); //创建行
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row.HeightInPoints = rowHeight; //设置列头行高
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return row;
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}
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/// <summary>
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/// 创建行内指定的单元格
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/// </summary>
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/// <param name="row">需要创建单元格的行</param>
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/// <param name="cellStyle">单元格样式</param>
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/// <param name="cellNum">创建第几个单元格(从0开始)</param>
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/// <param name="cellValue">给单元格赋值</param>
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/// <returns></returns>
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public HSSFCell CreateCells(HSSFRow row, HSSFCellStyle cellStyle, int cellNum, string cellValue)
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{
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HSSFCell cell = (HSSFCell)row.CreateCell(cellNum); //创建单元格
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cell.CellStyle = cellStyle; //将样式绑定到单元格
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if (!string.IsNullOrWhiteSpace(cellValue))
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{
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//单元格赋值
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cell.SetCellValue(cellValue);
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}
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return cell;
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}
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#endregion
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#region 导入
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/// <summary>
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/// 读取excel表格中的数据,将Excel文件流转化为dataTable数据源
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/// 默认第一行为标题
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/// </summary>
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/// <param name="stream">excel文档文件流</param>
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/// <param name="fileType">文档格式</param>
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/// <param name="isSuccess">是否转化成功</param>
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/// <param name="resultMsg">转换结果消息</param>
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/// <returns></returns>
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public DataTable ExcelToDataTable(Stream stream, string fileType)
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{
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//isSuccess = false;
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//resultMsg = "Excel文件流成功转化为DataTable数据源";
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var excelToDataTable = new DataTable();
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try
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{
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IWorkbook workbook;
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//XSSFWorkbook 适用XLSX格式，HSSFWorkbook 适用XLS格式
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#region 判断excel版本
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switch (fileType)
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{
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//2007以下版本excel
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case ".xlsx":
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workbook = new XSSFWorkbook(stream);
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break;
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case ".xls":
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workbook = new HSSFWorkbook(stream);
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break;
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default:
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throw new Exception("Excel文档格式有误");
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}
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#endregion
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var sheet = workbook.GetSheetAt(0);
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var rows = sheet.GetRowEnumerator();
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var headerRow = sheet.GetRow(0);
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int cellCount = headerRow.LastCellNum;//最后一行列数（即为总列数）
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//获取第一行标题列数据源,转换为dataTable数据源的表格标题名称
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for (var j = 0; j < cellCount; j++)
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{
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var cell = headerRow.GetCell(j);
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excelToDataTable.Columns.Add(cell.ToString());
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}
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//获取Excel表格中除标题以为的所有数据源，转化为dataTable中的表格数据源
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for (var i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
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{
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var dataRow = excelToDataTable.NewRow();
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var row = sheet.GetRow(i);
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if (row == null) continue; //没有数据的行默认是null
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for (int j = row.FirstCellNum; j < cellCount; j++)
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{
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if (row.GetCell(j) != null)//单元格内容非空验证
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{
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//获取指定的单元格信息
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var cell = row.GetCell(j);
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#region NPOI获取Excel单元格数据不同类型数据
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switch (cell.CellType)
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{
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//首先在NPOI中数字和日期都属于Numeric类型
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//通过NPOI中自带的DateUtil.IsCellDateFormatted判断是否为时间日期类型
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//case CellType.Numeric when DateUtil.IsCellDateFormatted(cell):
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// dataRow[j] = cell.DateCellValue;
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// break;
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case CellType.Numeric:
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//其他数字类型
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dataRow[j] = cell.NumericCellValue;
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break;
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//空数据类型
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case CellType.Blank:
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dataRow[j] = "";
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break;
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//公式类型
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case CellType.Formula:
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{
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HSSFFormulaEvaluator eva = new HSSFFormulaEvaluator(workbook);
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dataRow[j] = eva.Evaluate(cell).StringValue;
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break;
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}
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//布尔类型
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case CellType.Boolean:
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dataRow[j] = row.GetCell(j).BooleanCellValue;
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break;
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//错误
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case CellType.Error:
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// dataRow[j] = HSSFErrorConstants.GetText(row.GetCell(j).ErrorCellValue);
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break;
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//其他类型都按字符串类型来处理（未知类型CellType.Unknown，字符串类型CellType.String）
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default:
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dataRow[j] = cell.StringCellValue;
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break;
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}
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#endregion
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}
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}
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excelToDataTable.Rows.Add(dataRow);
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}
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//isSuccess = true;
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}
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catch (Exception e)
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{
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LogHelper.WriteLogInfo("上传" + e, LogHelper.Log_Type.ERROR);
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}
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return excelToDataTable;
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}
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#endregion
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}
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}
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