using System;
 System.Collections.Generic;
 System.Linq;
 System.Text;
 System.Data;
 System.IO;
 DocumentFormat.OpenXml.Packaging;
 DocumentFormat.OpenXml.Spreadsheet;
 System.Xml;
 System.Diagnostics;
 DocumentFormat.OpenXml;
 System.Reflection;

namespace OpenXMLTest
{
    /// <summary>
    /// 思考问题：
     1.对于Excel中所有不进行任何验证,直接转化为Table(有列头和无列头)
     2.对于Excel中数据匹配某一指定表的列头及其数据(有列头)
     3.对于Excel中数据不是处理在一张表中(有列头和无列头)
     4.对于Excel中数据多表处理和单表处理
     5.对于Excel中一个Sheet的数据来自多张数据库表
    </summary>
    public class ExcelOper
    {
        <summary>
         将DataTable转化为XML输出
        </summary>
        <param name="dataTable">DataTable</param>
        <param name="fileName">文件名称</param>
        void DataTableToXML(DataTable dataTable,string fileName)
        {
            //指定程序安装目录
            string filePath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + fileName;
            using (FileStream fs = new FileStream(filePath,FileMode.OpenOrCreate,FileAccess.Write))
            {
                using (XmlWriter xmlWriter = XmlWriter.Create(fs))
                {
                    dataTable.WriteXml(xmlWriter,XmlWriteMode.IgnoreSchema);
                }
            }
            Process.Start(filePath);
        }

         将Excel多单一表转化为DataSet数据集对象
        <param name="filePath">Excel文件路径<returns>转化的数据集</returns>
        public DataSet ExcelToDataSet( filePath)
        {
            DataSet dataSet =  DataSet();
            try
            {
                using (SpreadsheetDocument spreadDocument = SpreadsheetDocument.Open(filePath,255); line-height:1.5!important">false))
                {
                    指定WorkbookPart对象
                    WorkbookPart workBookPart = spreadDocument.WorkbookPart;
                    获取Excel中SheetName集合
                    List<string> sheetNames = GetSheetNames(workBookPart);

                    foreach (string sheetName in sheetNames)
                    {
                        DataTable dataTable = WorkSheetToTable(workBookPart,sheetName);
                        if (dataTable != null)
                        {
                            dataSet.Tables.Add(dataTable);将表添加到数据集
                        }
                    }
                }
            }
            catch (Exception exp)
            {
                throw new Exception("可能Excel正在打开中,请关闭重新操作！");
            }
            return dataSet;
        }

         将Excel单一表转化为DataTable对象
        <param name="sheetName">SheetName<param name="stream">DataTable对象public DataTable ExcelToDataTable(string sheetName,0); line-height:1.5!important"> filePath)
        {
            DataTable dataTable =  DataTable();
            根据Excel流转换为spreadDocument对象
                false))Excel文档包
                {
                    Workbook workBook = spreadDocument.WorkbookPart.Workbook;主文档部件的根元素
                    Sheets sheeets = workBook.Sheets;块级结构（如工作表、文件版本等）的容器
                    WorkbookPart workBookPart =if (sheetNames.Contains(sheetName))
                    {
                        根据WorkSheet转化为Table
                        dataTable = dataTable;
        }

         根据WorkbookPart获取所有SheetName
        <param name="workBookPart"></param>
        SheetName集合private List<string> GetSheetNames(WorkbookPart workBookPart)
        {
            List<string> sheetNames = new List<();
            Sheets sheets = workBookPart.Workbook.Sheets;
            foreach (Sheet sheet  sheets)
            {
                string sheetName = sheet.Name;
                if (!.IsNullOrEmpty(sheetName))
                {
                    sheetNames.Add(sheetName);
                }
            }
             sheetNames;
        }

         根据WorkbookPart和sheetName获取该Sheet下所有Row数据
        <param name="workBookPart">WorkbookPart对象该SheetName下的所有Row数据public IEnumerable<Row> GetWorkBookPartRows(WorkbookPart workBookPart,0); line-height:1.5!important"> sheetName)
        {
            IEnumerable<Row> sheetRows = ;
            根据表名在WorkbookPart中获取Sheet集合
            IEnumerable<Sheet> sheets = workBookPart.Workbook.Descendants<Sheet>().Where(s => s.Name == sheetName);
            if (sheets.Count() == 0)
            {
                return null;没有数据
            }

            WorksheetPart workSheetPart = workBookPart.GetPartById(sheets.First().Id) as WorksheetPart;
            获取Excel中得到的行
            sheetRows = workSheetPart.Worksheet.Descendants<Row>();

             sheetRows;
        }

         根据WorkbookPart和表名创建DataTable对象
        <param name="tableName">表名转化后的DataTableprivate DataTable WorkSheetToTable(WorkbookPart workBookPart,0); line-height:1.5!important"> sheetName)
        {
            创建Table
            DataTable dataTable =  DataTable(sheetName);

            根据WorkbookPart和sheetName获取该Sheet下所有行数据
            IEnumerable<Row> sheetRows = GetWorkBookPartRows(workBookPart,sheetName);
            if (sheetRows == null || sheetRows.Count() <= ;
            }

            将数据导入DataTable,假定第一行为列名,第二行以后为数据
            foreach (Row row  sheetRows)
            {
                获取Excel中的列头
                if (row.RowIndex == 1)
                {
                    List<DataColumn> listCols = GetDataColumn(row,workBookPart);
                    dataTable.Columns.AddRange(listCols.ToArray());
                }
                else
                {
                    Excel第二行同时为DataTable的第一行数据
                    DataRow dataRow = GetDataRow(row,dataTable,workBookPart);
                    if (dataRow != )
                    {
                        dataTable.Rows.Add(dataRow);
                    }
                }
            }
             根据WorkbookPart获取NumberingFormats样式集合
        NumberingFormats样式集合 GetNumberFormatsStyle(WorkbookPart workBookPart)
        {
            List<string> dicStyle = ();
            Stylesheet styleSheet = workBookPart.WorkbookStylesPart.Stylesheet;
            OpenXmlElementList list = styleSheet.NumberingFormats.ChildElements;获取NumberingFormats样式集合

            var element in list)格式化节点
            {
                 (element.HasAttributes)
                {
                    using (OpenXmlReader reader = OpenXmlReader.Create(element))
                    {
                         (reader.Read())
                        {
                            if (reader.Attributes.Count > )
                            {
                                string numFmtId = reader.Attributes[0].Value;格式化ID
                                string formatCode = reader.Attributes[1].Value;格式化Code
                                dicStyle.Add(formatCode);将格式化Code写入List集合
                            }
                        }
                    }
                }
            }
             dicStyle;
        }

         根据行对象和WorkbookPart对象获取DataColumn集合
        <param name="row">Excel中行记录返回DataColumn对象集合private List<DataColumn> GetDataColumn(Row row,WorkbookPart workBookPart)
        {
            List<DataColumn> listCols = new List<DataColumn>();
            foreach (Cell cell  row)
            {
                string cellValue = GetCellValue(cell,workBookPart);
                DataColumn col =  DataColumn(cellValue);
                listCols.Add(col);
            }
             listCols;
        }

         根据Excel行\数据库表\WorkbookPart对象获取数据DataRow
        Excel中行对象<param name="dateTable">数据表返回一条数据记录private DataRow GetDataRow(Row row,DataTable dateTable,WorkbookPart workBookPart)
        {
            读取Excel中数据,一一读取单元格,若整行为空则忽视该行
            DataRow dataRow = dateTable.NewRow();
            IEnumerable<Cell> cells = row.Elements<Cell>int cellIndex = 0;单元格索引
            int nullCellCount = cellIndex;空行索引
            string cellVlue =if (.IsNullOrEmpty(cellVlue))
                {
                    nullCellCount++;
                }

                dataRow[cellIndex] = cellVlue;
                cellIndex++;
            }
            if (nullCellCount == cellIndex)剔除空行
            {
                dataRow = 一行中单元格索引和空行索引一样
 dataRow;
        }

         根据Excel单元格和WorkbookPart对象获取单元格的值
        <param name="cell">Excel单元格对象Excel WorkbookPart对象单元格的值 GetCellValue(Cell cell,255); line-height:1.5!important">string cellValue = .Empty;
            if (cell.ChildElements.Count == 0)Cell节点下没有子节点
 cellValue;
            }
            string cellRefId = cell.CellReference.InnerText;获取引用相对位置
            string cellInnerText = cell.CellValue.InnerText;获取Cell的InnerText
            cellValue = cellInnerText;指定默认值(其实用来处理Excel中的数字)

            获取WorkbookPart中NumberingFormats样式集合
            List<string> dicStyles = GetNumberFormatsStyle(workBookPart);
            获取WorkbookPart中共享String数据
            SharedStringTable sharedTable = workBookPart.SharedStringTablePart.SharedStringTable;

            
            {
                EnumValue<CellValues> cellType = cell.DataType;获取Cell数据类型
                if (cellType != null)Excel对象数据
switch (cellType.Value)
                    {
                        case CellValues.SharedString:字符串
                            获取该Cell的所在的索引
                            int cellIndex = int.Parse(cellInnerText);
                            cellValue = sharedTable.ChildElements[cellIndex].InnerText;
                            break;
                        case CellValues.Boolean:布尔
                            cellValue = (cellInnerText == "1") ? TRUE" : FALSE";
                            case CellValues.Date:日期
                            cellValue = Convert.ToDateTime(cellInnerText).ToString();
                            case CellValues.Number:数字
                            cellValue = Convert.ToDecimal(cellInnerText).ToString();
                            default: cellValue = cellInnerText; ;
                    }
                }
                格式化数据
if (dicStyles.Count > 0 && cell.StyleIndex != 对于数字,cell.StyleIndex==null
                    {
                        int styleIndex = Convert.ToInt32(cell.StyleIndex.Value);
                        string cellStyle = dicStyles[styleIndex - 1];获取该索引的样式
                        if (cellStyle.Contains(yyyy") || cellStyle.Contains(h)
                            || cellStyle.Contains(ddss))
                        {
                            如果为日期或时间进行格式处理,去掉“;@”
                            cellStyle = cellStyle.Replace(;@","");
                            while (cellStyle.Contains([") && cellStyle.Contains(]))
                            {
                                int otherStart = cellStyle.IndexOf('');
                                int otherEnd = cellStyle.IndexOf();

                                cellStyle = cellStyle.Remove(otherStart,otherEnd - otherStart + );
                            }
                            double doubleDateTime = double.Parse(cellInnerText);
                            DateTime dateTime = DateTime.FromOADate(doubleDateTime);将Double日期数字转为日期格式
                            m")) { cellStyle = cellStyle.Replace(M); }
                            AM/PM); }
                            cellValue = dateTime.ToString(cellStyle);不知道为什么Excel 2007中格式日期为yyyy/m/d
                        }
                        其他的货币、数值
                        {
                            cellStyle = cellStyle.Substring(cellStyle.LastIndexOf(.') - 1).Replace(\\decimal decimalNum = decimal.Parse(cellInnerText);
                            cellValue = .Parse(decimalNum.ToString(cellStyle)).ToString();
                        }
                    }
                }
            }
            string expMessage = string.Format("Excel中{0}位置数据有误,请确认填写正确！",cellRefId);
                throw new Exception(expMessage);
                cellValue = N/A cellValue;
        }

         获取Excel中多表的表名
        <param name="filePath"></param>
        <returns></returns>
        string> GetExcelSheetNames( filePath)
        {
            string sheetName = .Empty;
            List<string>();所有Sheet表名
            ))
            {
                WorkbookPart workBook = spreadDocument.WorkbookPart;
                Stream stream = workBook.GetStream(FileMode.Open);
                XmlDocument xmlDocument =  XmlDocument();
                xmlDocument.Load(stream);

                XmlNamespaceManager xmlNSManager =  XmlNamespaceManager(xmlDocument.NaMetable);
                xmlNSManager.AddNamespace(default,xmlDocument.DocumentElement.NamespaceURI);
                XmlNodeList nodeList = xmlDocument.SelectNodes(//default:sheets/default:sheetforeach (XmlNode node  nodeList)
                {
                    sheetName = node.Attributes[name].Value;
                    sheetNames.Add(sheetName);
                }
            }
             sheetNames;
        }


        #region SaveCell
        private void InsertTextCellValue(Worksheet worksheet,255); line-height:1.5!important">string column,255); line-height:1.5!important">uint row,0); line-height:1.5!important"> value)
        {
            Cell cell = ReturnCell(worksheet,column,row);
            CellValue v =  CellValue();
            v.Text = value;
            cell.AppendChild(v);
            cell.DataType = new EnumValue<CellValues>(CellValues.String);
            worksheet.Save();
        }
        void InsertNumberCellValue(Worksheet worksheet,0); line-height:1.5!important">(CellValues.Number);
            worksheet.Save();
        }
        static Cell ReturnCell(Worksheet worksheet,255); line-height:1.5!important">string columnName,255); line-height:1.5!important">uint row)
        {
            Row targetRow = ReturnRow(worksheet,row);

            if (targetRow == )
                ;

            return targetRow.Elements<Cell>().Where(c =>
               string.Compare(c.CellReference.Value,columnName + row,true) == ).First();
        }
        static Row ReturnRow(Worksheet worksheet,0); line-height:1.5!important"> row)
        {
            return worksheet.GetFirstChild<SheetData>().
            Elements<Row>().Where(r => r.RowIndex == row).First();
        }
        #endregion
    }
}