C#下使用第三方开源控件读取Excel文件的内容

使用了两个开源控件读取Excel文件的内容,不需要安装Excel或Office,开发环境可能需要vs2008(2005没测试过)

NPOI, 读取xls文件(Excel2003及之前的版本) (NPOI.dll+Ionic.Zip.dll) http://npoi.codeplex.com/

EPPlus, 读取xlsx文件(Excel2007版本) (EPPlus.dll) http://epplus.codeplex.com/

本文中只实现了Excel文件的读取,实际上,这两个控件均支持对其内容,格式,公式等进行修改,这些复杂功能尚无需求,所以没有实现

读取接口IExcel:

public interface IExcel{/// <summary> 打开文件 </summary>bool Open();/// <summary> 文件版本 </summary>ExcelVersion Version { get; }/// <summary> 文件路径 </summary>string FilePath { get; set; }/// <summary> 文件是否已经打开 </summary>bool IfOpen { get;  }/// <summary> 文件包含工作表的数量 </summary>int SheetCount { get; }/// <summary> 当前工作表序号 </summary>int CurrentSheetIndex { get; set; }/// <summary> 获取当前工作表中行数 </summary>int GetRowCount();/// <summary> 获取当前工作表中列数 </summary>int GetColumnCount();/// <summary> 获取当前工作表中某一行中单元格的数量 </summary>/// <param name="Row">行序号</param>int GetCellCountInRow(int Row);/// <summary> 获取当前工作表中某一单元格的值（按字符串返回） </summary>/// <param name="Row">行序号</param>/// <param name="Col">列序号</param>string GetCellValue(int Row, int Col);/// <summary> 关闭文件 </summary>void Close();}public enum ExcelVersion{/// <summary> Excel2003之前版本 ,xls </summary>Excel03,/// <summary> Excel2007版本 ,xlsx  </summary>Excel07}

xls文件实现:

using NPOI.HSSF.UserModel;public class Excel03:IExcel{public Excel03(){ }public Excel03(string path){ filePath = path; }private FileStream file = null;private string filePath = "";private HSSFWorkbook book = null;private int sheetCount=0;private bool ifOpen = false;private int currentSheetIndex = 0;private HSSFSheet currentSheet = null;public string FilePath{get  { return filePath; }set { filePath = value; }}public bool Open(){try{file = new FileStream(filePath, FileMode.Open, FileAccess.Read);book= new HSSFWorkbook(file);if (book == null) return false;sheetCount = book.NumberOfSheets;currentSheetIndex = 0;currentSheet = (HSSFSheet)book.GetSheetAt(0);ifOpen = true;}catch (Exception ex){throw new Exception("打开文件失败，详细信息：" + ex.Message);}return true;}public void  Close(){if (!ifOpen) return;file.Close();}public ExcelVersion Version{ get { return ExcelVersion.Excel03; } }public bool IfOpen{ get { return ifOpen; } }public int SheetCount{ get { return sheetCount; } }public int CurrentSheetIndex{get { return currentSheetIndex; }set {if (value != currentSheetIndex){if (value >= sheetCount)throw new Exception("工作表序号超出范围");currentSheetIndex = value;currentSheet = (HSSFSheet)book.GetSheetAt(currentSheetIndex);}}}public int GetRowCount(){if (currentSheet == null) return 0;return currentSheet.LastRowNum + 1;         }public int GetColumnCount(){if (currentSheet == null) return 0;int colCount = 0;for (int i = 0; i <= currentSheet.LastRowNum; i++){if (currentSheet.GetRow(i) != null && currentSheet.GetRow(i).LastCellNum+1 > colCount)colCount = currentSheet.GetRow(i).LastCellNum + 1;}return colCount;}public int GetCellCountInRow(int Row){if (currentSheet == null) return 0;if (Row > currentSheet.LastRowNum) return 0;if (currentSheet.GetRow(Row) == null) return 0;return currentSheet.GetRow(Row).LastCellNum+1;}public string GetCellValue(int Row, int Col){if (Row > currentSheet.LastRowNum) return "";if (currentSheet.GetRow(Row) == null) return "";HSSFRow r = (HSSFRow)currentSheet.GetRow(Row);if (Col > r.LastCellNum) return "";if (r.GetCell(Col) == null) return "";return r.GetCell(Col).StringCellValue;            }}

xlsx文件实现:

using OfficeOpenXml;public class Excel07:IExcel{ public Excel07(){ }public Excel07(string path){ filePath = path; }private string filePath = "";private ExcelWorkbook book = null;private int sheetCount = 0;private bool ifOpen = false;private int currentSheetIndex = 0;private ExcelWorksheet currentSheet = null;private ExcelPackage ep = null;public bool Open(){try{ep = new ExcelPackage(new FileInfo(filePath));if (ep == null) return false;book =ep.Workbook;sheetCount = book.Worksheets.Count;currentSheetIndex = 0;currentSheet = book.Worksheets[1];ifOpen = true;}catch (Exception ex){throw new Exception("打开文件失败，详细信息：" + ex.Message);}return true;}public void Close(){if (!ifOpen || ep == null) return;ep.Dispose();}public ExcelVersion Version{ get { return ExcelVersion.Excel07; } }public string FilePath{get { return filePath; }set { filePath = value; }}public bool IfOpen{ get { return ifOpen; } }public int SheetCount{ get { return sheetCount; } }public int CurrentSheetIndex{get  { return currentSheetIndex; }set{if (value != currentSheetIndex){if (value >= sheetCount)throw new Exception("工作表序号超出范围");currentSheetIndex = value;currentSheet =book.Worksheets[currentSheetIndex+1];}}}public int GetRowCount(){if (currentSheet == null) return 0;return currentSheet.Dimension.End.Row;}public int GetColumnCount(){if (currentSheet == null) return 0;return currentSheet.Dimension.End.Column;}public int GetCellCountInRow(int Row){if (currentSheet == null) return 0;if (Row >= currentSheet.Dimension.End.Row) return 0;return currentSheet.Dimension.End.Column;}public string GetCellValue(int Row, int Col){if (currentSheet == null) return "";if (Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column) return "";object tmpO =currentSheet.GetValue(Row + 1, Col + 1);if (tmpO == null) return "";return tmpO.ToString();}        }

调用类:

 public class ExcelLib{/// <summary> 获取Excel对象 </summary>/// <param name="filePath">Excel文件路径</param>/// <returns></returns>public static IExcel GetExcel(string filePath){if (filePath.Trim() == "") throw new Exception("文件名不能为空");if(!filePath.Trim().EndsWith("xls") && !filePath.Trim().EndsWith("xlsx"))throw new Exception("不支持该文件类型");if (filePath.Trim().EndsWith("xls")){IExcel res = new Excel03(filePath.Trim());return res;}else if (filePath.Trim().EndsWith("xlsx")){IExcel res = new Excel07(filePath.Trim());return res;}else return null;}}

程序中调用:

ExcelLib.IExcel tmp = ExcelLib.ExcelLib.GetExcel(Application.StartupPath + "\\TestUnicodeChars.xls");
//ExcelLib.IExcel tmp = ExcelLib.ExcelLib.GetExcel(Application.StartupPath + "\\TestUnicodeChars.xlsx");if (tmp == null) MessageBox.Show("打开文件错误");
try
{ if (!tmp.Open()) MessageBox.Show("打开文件错误");tmp.CurrentSheetIndex = 1; int asdf = tmp.GetColumnCount(); string sdf = tmp.GetCellValue(0,1); tmp.Close();
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); return ; }

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C#下使用第三方开源控件读取Excel文件的内容

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