ds8-solution-pro/ds-wms-service/DS.WMS.Core/Utils/ExportFileHelper.cs

using iText.Kernel.Utils.Objectpathitems;
using iText.Kernel.XMP.Impl.XPath;
using LanguageExt;
using LanguageExt.TypeClasses;
using Masuit.Tools.Strings;
using Microsoft.AspNetCore.Identity;
using NPOI.HPSF;
using NPOI.HSSF.UserModel;
using NPOI.SS.Formula.Functions;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using static iText.StyledXmlParser.Jsoup.Select.Evaluator;

namespace DS.WMS.Core.Utils
{

    public class ExportFileHelper
    {
        /// <summary>
        /// Excel行高，Height的单位是1/20个点。例：设置高度为25个点
        /// </summary>
        private static short rowHeight = 25 * 20;

        #region 导出Excel

        #region 导出
        /// <summary>
        /// 导出
        /// </summary>
        /// <param name="dt">数据源</param>
        /// <param name="strHeader">列名</param>
        /// <param name="fileName">绝对路径</param>
        /// <param name="sheetName">sheet页名</param>
        public static void Export<T>(List<T> dataList, Dictionary<string, string> colDicts, string fileName, string sheetName = "Sheet1")
        {
            // 使用 NPOI 组件导出 Excel 文件

            //XSSFWorkbook:是操作Excel2007的版本，扩展名是.xlsx
            XSSFWorkbook workbook = new XSSFWorkbook();

            //HSSFWorkbook:是操作Excel2003以前（包括2003）的版本，扩展名是.xls
            //HSSFWorkbook workbook = new HSSFWorkbook();

            //创建Sheet
            ISheet sheet = workbook.CreateSheet(sheetName);

            

            //设置单元格样式
            ICellStyle style = SetCellStyle(workbook);

            //创建表格
            NPOICreateTable(dataList, colDicts, sheet, style, 0);

            // 将 Excel 文件保存到磁盘
            NPOISaveFile(workbook, fileName);

            // 释放资源
            //workbook.Dispose();
        }
        #endregion

        #region 自定义框架，导出
        /// <summary>
        /// 自定义顶部，导出
        /// </summary>
        /// <param name="dt">数据源</param>
        /// <param name="strArry">拆分后列名</param>
        /// <param name="fileName">绝对路径，路径+文件名+后缀</param>
        /// <param name="num">新一行索引，开始</param>
        /// <param name="workbook"></param>
        /// <param name="sheet"></param>
        public static void Export<T>(List<T> dataList, Dictionary<string, string> colDicts, string fileName, int num, XSSFWorkbook workbook, ISheet sheet)
        {
            //设置单元格样式
            ICellStyle style = SetCellStyle(workbook);

            //创建表格
            NPOICreateTable(dataList, colDicts, sheet, style, num);

            // 将 Excel 文件保存到磁盘
            NPOISaveFile(workbook, fileName);

            // 释放资源
            //workbook.Dispose();
        }
        #endregion

        #endregion

        #region 获取用户选择保存路径

        /// <summary>
        /// 获取让用户选择保存文件的绝对路径
        /// </summary>
        /// <returns></returns>
        //public static string GetSaveFileRoute(string filter, string fileName)
        //{
        //    SaveFileDialog dialog = new SaveFileDialog();
        //    dialog.Filter = filter;
        //    dialog.FileName = fileName;
        //    if (dialog.ShowDialog() == true)
        //    {
        //        return dialog.FileName;
        //    }
        //    return "";
        //}

        #endregion

        #region 保存文件

        private static string NPOISaveFile(XSSFWorkbook workbook, string fileName)
        {
            try
            {
                // 将 Excel 文件保存到磁盘
                using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
                {
                    workbook.Write(fs);
                }

                return "";
            }
            catch (Exception err)
            {
                return err.Message;
            }
        }

        #endregion

        #region 创建表格

        /// <summary>
        /// 创建表格
        /// </summary>
        /// <param name="dataList">数据源</param>
        /// <param name="strArry">拆分后的列名</param>
        /// <param name="sheet">Sheet页</param>
        /// <param name="style">样式</param>
        /// <param name="num">行索引</param>
        private static void NPOICreateTable<T>(List<T> dataList, Dictionary<string, string> colDicts, ISheet sheet, ICellStyle style, int num)
        {
            string[] strArry = colDicts.Select(b => b.Value).ToArray();

            IRow row = null;//声明行

            #region 创建列名

            //在索引 num 的位置 创建一行
            row = sheet.CreateRow(num);
            row.Height = rowHeight;//设置行高

            //循环列名数组，创建单元格并赋值、样式
            for (int i = 0; i < strArry.Length; i++)
            {
                row.CreateCell(i).SetCellValue(strArry[i]);
                row.GetCell(i).CellStyle = style;
            }

            #endregion

            #region 创建行

            //循环数据源 创建行
            for (int i = 0; i < dataList.Count; i++)
            {
                //创建行
                row = sheet.CreateRow(num + 1);
                row.Height = rowHeight;//设置行高
                num++;//行索引自增

                Dictionary<string, Tuple<string, string>> dataDict = new Dictionary<string, Tuple<string, string>>();

                foreach (System.Reflection.PropertyInfo p in dataList[i].GetType().GetProperties())
                {
                    var value = p.GetValue(dataList[i]);


                    dataDict.Add(p.Name,new Tuple<string, string>(value.ToString(), p.PropertyType.Name));
                }

                //循环数据源列集合，创建单元格
                foreach (var col in colDicts)
                {

                    //var pList = TypeDescriptor.GetProperties(T)

                    string ValueType = "";//值类型
                    string Value = "";//值
                                      //类型 和 值，赋值
                                      //if (dt.Rows[i][j].ToString() != null)
                                      //{
                                      //    ValueType = dt.Rows[i][j].GetType().ToString();
                                      //    Value = dt.Rows[i][j].ToString();
                                      //}
                    var j = 0;
                    //根据不同数据类型，对数据处理。处理后创建单元格并赋值 和 样式
                    switch (ValueType)
                    {
                        case "System.String"://字符串类型
                            row.CreateCell(j).SetCellValue(Value);
                            break;
                        case "System.DateTime"://日期类型
                            System.DateTime dateV;
                            System.DateTime.TryParse(Value, out dateV);
                            row.CreateCell(j).SetCellValue(dateV.ToString("yyyy-MM-dd"));
                            break;
                        case "System.Boolean"://布尔型
                            bool boolV = false;
                            bool.TryParse(Value, out boolV);
                            row.CreateCell(j).SetCellValue(boolV);
                            break;
                        case "System.Int16"://整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(Value, out intV);
                            row.CreateCell(j).SetCellValue(intV);
                            break;
                        case "System.Decimal"://浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(Value, out doubV);
                            row.CreateCell(j).SetCellValue(doubV);
                            break;
                        case "System.DBNull"://空值处理
                            row.CreateCell(j).SetCellValue("");
                            break;
                        default:
                            row.CreateCell(j).SetCellValue("");
                            break;
                    }
                    row.GetCell(j).CellStyle = style;
                    //设置宽度
                    //sheet.SetColumnWidth(j, (Value.Length + 10) * 256);
                }
            }

            #endregion

            //循环列名数组，多所有列 设置 自动列宽
            for (int i = 0; i < strArry.Length; i++)
            {
                sheet.AutoSizeColumn(i);
            }
        }

        #endregion

        public string GetPropertyValue<T>(T t, string field)
        {
            string value = "9";
            if (t == null)
            {
                return value;
            }
            PropertyInfo[] properties = t.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);

            if (properties.Length <= 0)
            {
                return value;
            }
            var property = properties.Where(x => x.Name == field).FirstOrDefault();
            value = property.GetValue(t, null).ToString();

            return value;
        }


        #region 设置单元格样式

        public static ICellStyle SetCellStyle(XSSFWorkbook workbook)
        {
            #region 单元格样式

            //创建一个样式
            ICellStyle style = workbook.CreateCellStyle();
            style.Alignment = HorizontalAlignment.Center;//水平对齐
            style.VerticalAlignment = VerticalAlignment.Center;//垂直对齐

            style.BorderBottom = BorderStyle.Thin;//下边框为细线边框
            style.BorderLeft = BorderStyle.Thin;//左边框
            style.BorderRight = BorderStyle.Thin;//上边框
            style.BorderTop = BorderStyle.Thin;//右边框

            #endregion

            return style;
        }
        #endregion
    }

    /// <summary>
    /// 导出excel-中英文规则类
    /// </summary>
    public class ExportRegular
    {
        /// <summary>
        /// 属性名称（英文）
        /// </summary>
        public string PropertyName { get; set; }
        /// <summary>
        /// 数据类型
        /// </summary>
        public string DataType { get; set; }

        /// <summary>
        /// 导出名称（中文）
        /// </summary>
        public string ExportFieldName { get; set; }
    }

}