using System;
using System.Collections.Generic;
using System.Linq;
using System.Data;
using System.IO;
using System.Xml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using DocumentFormat.OpenXml;
namespace ECLink.Common
{
/// <summary>
/// 采用openxml方式把excel转换成DataSet
/// </summary>
public class ExcelHelper
{
public ExcelHelper()
{
}
/// <summary>
/// 将Excel多单一表转化为DataSet数据集对象
/// </summary>
/// <param name="filePath">Excel文件路径</param>
/// <returns>转化的数据集</returns>
public DataSet ExcelToDataSet(string filePath)
{
DataSet dataSet = new DataSet();
try
{
using (SpreadsheetDocument spreadDocument = SpreadsheetDocument.Open(filePath, 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;
}
/// <summary>
/// 根据WorkbookPart和表名创建DataTable对象
/// </summary>
/// <param name="workBookPart">WorkbookPart对象</param>
/// <param name="tableName">表名</param>
/// <returns>转化后的DataTable</returns>
public DataTable WorkSheetToTable(WorkbookPart workBookPart, string sheetName)
{
//创建Table
DataTable dataTable = new DataTable(sheetName);
//根据WorkbookPart和sheetName获取该Sheet下所有行数据
IEnumerable<Row> sheetRows = GetWorkBookPartRows(workBookPart, sheetName);
IEnumerable<Column> sheetColumns = GetWorkBookPartColumns(workBookPart, sheetName);
if (sheetRows == null || sheetRows.Count() <= 0)
{
return null;
}
SharedStringTable stringTable = workBookPart.SharedStringTablePart.SharedStringTable;
//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 in sheetRows)
{
//获取Excel中的列头
if (row.RowIndex == 1)
{
GetDataColumn(row, stringTable, ref dataTable);
}
else
{
GetDataRow(row, stringTable, ref dataTable);
}
}
return dataTable;
}
/// <summary>
/// 根据WorkbookPart获取所有SheetName
/// </summary>
/// <param name="workBookPart"></param>
/// <returns>SheetName集合</returns>
private List<string> GetSheetNames(WorkbookPart workBookPart)
{
List<string> sheetNames = new List<string>();
Sheets sheets = workBookPart.Workbook.Sheets;
foreach (Sheet sheet in sheets)
{
string sheetName = sheet.Name;
if (!string.IsNullOrEmpty(sheetName))
{
sheetNames.Add(sheetName);
}
}
return sheetNames;
}
/// <summary>
/// 根据WorkbookPart和sheetName获取该Sheet下所有Row数据
/// </summary>
/// <param name="workBookPart">WorkbookPart对象</param>
/// <param name="sheetName">SheetName</param>
/// <returns>该SheetName下的所有Row数据</returns>
public IEnumerable<Row> GetWorkBookPartRows(WorkbookPart workBookPart, string sheetName)
{
IEnumerable<Row> sheetRows = null;
//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>();
return sheetRows;
}
/// <summary>
/// 根据WorkbookPart和sheetName获取该Sheet下所有Row数据
/// </summary>
/// <param name="workBookPart">WorkbookPart对象</param>
/// <param name="sheetName">SheetName</param>
/// <returns>该SheetName下的所有Row数据</returns>
public IEnumerable<Column> GetWorkBookPartColumns(WorkbookPart workBookPart, string sheetName)
{
IEnumerable<Column> sheetColumns = null;
//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;
sheetColumns = workSheetPart.Worksheet.Descendants<Column>(); //获取Excel中得到的行
return sheetColumns;
}
/// <summary>
/// 获取Excel中多表的表名
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
private List<string> GetExcelSheetNames(string filePath)
{
string sheetName = string.Empty;
List<string> sheetNames = new List<string>();//所有Sheet表名
using (SpreadsheetDocument spreadDocument = SpreadsheetDocument.Open(filePath, false))
{
WorkbookPart workBook = spreadDocument.WorkbookPart;
Stream stream = workBook.GetStream(FileMode.Open);
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Load(stream);
XmlNamespaceManager xmlNSManager = new XmlNamespaceManager(xmlDocument.NameTable);
xmlNSManager.AddNamespace("default", xmlDocument.DocumentElement.NamespaceURI);
XmlNodeList nodeList = xmlDocument.SelectNodes("//default:sheets/default:sheet", xmlNSManager);
foreach (XmlNode node in nodeList)
{
sheetName = node.Attributes["name"].Value;
sheetNames.Add(sheetName);
}
}
return sheetNames;
}
#region 采用openxml方式把excel转换成dataTable
/// <summary>
/// 构建DataTable的列
/// </summary>
/// <param name="row">OpenXML定义的Row对象</param>
/// <param name="stringTablePart"></param>
/// <param name="dt">须要返回的DataTable对象</param>
/// <returns></returns>
public void GetDataColumn(Row row, SharedStringTable stringTable, ref DataTable dt)
{
DataColumn col = new DataColumn();
Dictionary<string, int> columnCount = new Dictionary<string, int>();
foreach (Cell cell in row)
{
string cellVal = GetValue(cell, stringTable);
col = new DataColumn(cellVal);
if (IsContainsColumn(dt, col.ColumnName))
{
if (!columnCount.ContainsKey(col.ColumnName))
columnCount.Add(col.ColumnName, 0);
col.ColumnName = col.ColumnName + (columnCount[col.ColumnName]++);
}
dt.Columns.Add(col);
}
}
/// <summary>
/// 构建DataTable的每一行数据,并返回该Datatable
/// </summary>
/// <param name="row">OpenXML的行</param>
/// <param name="stringTablePart"></param>
/// <param name="dt">DataTable</param>
private void GetDataRow(Row row, SharedStringTable stringTable, ref DataTable dt)
{
// 读取算法：按行一一读取单位格,若是整行均是空数据
DataRow dr = dt.NewRow();
int i = 0;
int nullRowCount = i;
foreach (Cell cell in row)
{
string cellVal = GetValue(cell, stringTable);
if (cellVal == string.Empty)
{
nullRowCount++;
}
dr[i] = cellVal;
i++;
}
if (nullRowCount != i)
{
dt.Rows.Add(dr);
}
}
/// <summary>
/// 获取单位格的值
/// </summary>
/// <param name="cell"></param>
/// <param name="stringTablePart"></param>
/// <returns></returns>
private string GetValue(Cell cell, SharedStringTable stringTable)
{
//因为Excel的数据存储在SharedStringTable中,须要获取数据在SharedStringTable 中的索引
string value = string.Empty;
try
{
if (cell.ChildElements.Count == 0)
return value;
value = double.Parse(cell.CellValue.InnerText).ToString();
if ((cell.DataType != null) && (cell.DataType == CellValues.SharedString))
{
value = stringTable.ChildElements[Int32.Parse(value)].InnerText;
}
}
catch (Exception)
{
value = "N/A";
}
return value;
}
/// <summary>
/// 判断网格是否存在列
/// </summary>
/// <param name="dt">网格</param>
/// <param name="columnName">列名</param>
/// <returns></returns>
public bool IsContainsColumn(DataTable dt, string columnName)
{
if (dt == null || columnName == null)
{
return false;
}
return dt.Columns.Contains(columnName);
}
#endregion
#region SaveCell
private void InsertTextCellValue(Worksheet worksheet, string column, uint row, string value)
{
Cell cell = ReturnCell(worksheet, column, row);
CellValue v = new CellValue();
v.Text = value;
cell.AppendChild(v);
cell.DataType = new EnumValue<CellValues>(CellValues.String);
worksheet.Save();
}
private void InsertNumberCellValue(Worksheet worksheet, string column, uint row, string value)
{
Cell cell = ReturnCell(worksheet, column, row);
CellValue v = new CellValue();
v.Text = value;
cell.AppendChild(v);
cell.DataType = new EnumValue<CellValues>(CellValues.Number);
worksheet.Save();
}
private static Cell ReturnCell(Worksheet worksheet, string columnName, uint row)
{
Row targetRow = ReturnRow(worksheet, row);
if (targetRow == null)
return null;
return targetRow.Elements<Cell>().Where(c =>
string.Compare(c.CellReference.Value, columnName + row,
true) == 0).First();
}
private static Row ReturnRow(Worksheet worksheet, uint row)
{
return worksheet.GetFirstChild<SheetData>().
Elements<Row>().Where(r => r.RowIndex == row).First();
}
#endregion
}
}
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