http://blog.csdn.net/halym/article/details/9235823
Excel2003:
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- #region Excel2003
- /// <summary>
- /// 将Excel文件中的数据读出到DataTable中(xls)
- /// </summary>
- /// <param name="file"></param>
- /// <returns></returns>
- public static DataTable ExcelToTableForXLS(string file)
- {
- DataTable dt = new DataTable();
- using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
- {
- XLS.HSSFWorkbook hssfworkbook = new XLS.HSSFWorkbook(fs);
- ISheet sheet = hssfworkbook.GetSheetAt(0);
- //表头
- IRow header = sheet.GetRow(sheet.FirstRowNum);
- List<int> columns = new List<int>();
- for (int i = 0; i < header.LastCellNum; i++)
- {
- object obj = GetValueTypeForXLS(header.GetCell(i) as XLS.HSSFCell);
- if (obj == null || obj.ToString() == string.Empty)
- {
- dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
- //continue;
- }
- else
- dt.Columns.Add(new DataColumn(obj.ToString()));
- columns.Add(i);
- }
- //数据
- for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
- {
- DataRow dr = dt.NewRow();
- bool hasValue = false;
- foreach (int j in columns)
- {
- dr[j] = GetValueTypeForXLS(sheet.GetRow(i).GetCell(j) as XLS.HSSFCell);
- if (dr[j] != null && dr[j].ToString() != string.Empty)
- {
- hasValue = true;
- }
- }
- if (hasValue)
- {
- dt.Rows.Add(dr);
- }
- }
- }
- return dt;
- }
- /// <summary>
- /// 将DataTable数据导出到Excel文件中(xls)
- /// </summary>
- /// <param name="dt"></param>
- /// <param name="file"></param>
- public static void TableToExcelForXLS(DataTable dt, string file)
- {
- XLS.HSSFWorkbook hssfworkbook = new XLS.HSSFWorkbook();
- ISheet sheet = hssfworkbook.CreateSheet("Test");
- //表头
- IRow row = sheet.CreateRow(0);
- for (int i = 0; i < dt.Columns.Count; i++)
- {
- ICell cell = row.CreateCell(i);
- cell.SetCellValue(dt.Columns[i].ColumnName);
- }
- //数据
- for (int i = 0; i < dt.Rows.Count; i++)
- {
- IRow row1 = sheet.CreateRow(i + 1);
- for (int j = 0; j < dt.Columns.Count; j++)
- {
- ICell cell = row1.CreateCell(j);
- cell.SetCellValue(dt.Rows[i][j].ToString());
- }
- }
- //转为字节数组
- MemoryStream stream = new MemoryStream();
- hssfworkbook.Write(stream);
- var buf = stream.ToArray();
- //保存为Excel文件
- using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write))
- {
- fs.Write(buf, 0, buf.Length);
- fs.Flush();
- }
- }
- /// <summary>
- /// 获取单元格类型(xls)
- /// </summary>
- /// <param name="cell"></param>
- /// <returns></returns>
- private static object GetValueTypeForXLS(XLS.HSSFCell cell)
- {
- if (cell == null)
- return null;
- switch (cell.CellType)
- {
- case CellType.BLANK: //BLANK:
- return null;
- case CellType.BOOLEAN: //BOOLEAN:
- return cell.BooleanCellValue;
- case CellType.NUMERIC: //NUMERIC:
- return cell.NumericCellValue;
- case CellType.STRING: //STRING:
- return cell.StringCellValue;
- case CellType.ERROR: //ERROR:
- return cell.ErrorCellValue;
- case CellType.FORMULA: //FORMULA:
- default:
- return "=" + cell.CellFormula;
- }
- }
- #endregion
Excel2007:
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- #region Excel2007
- /// <summary>
- /// 将Excel文件中的数据读出到DataTable中(xlsx)
- /// </summary>
- /// <param name="file"></param>
- /// <returns></returns>
- public static DataTable ExcelToTableForXLSX(string file)
- {
- DataTable dt = new DataTable();
- using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
- {
- XSSFWorkbook xssfworkbook = new XSSFWorkbook(fs);
- ISheet sheet = xssfworkbook.GetSheetAt(0);
- //表头
- IRow header = sheet.GetRow(sheet.FirstRowNum);
- List<int> columns = new List<int>();
- for (int i = 0; i < header.LastCellNum; i++)
- {
- object obj = GetValueTypeForXLSX(header.GetCell(i) as XSSFCell);
- if (obj == null || obj.ToString() == string.Empty)
- {
- dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
- //continue;
- }
- else
- dt.Columns.Add(new DataColumn(obj.ToString()));
- columns.Add(i);
- }
- //数据
- for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
- {
- DataRow dr = dt.NewRow();
- bool hasValue = false;
- foreach (int j in columns)
- {
- dr[j] = GetValueTypeForXLSX(sheet.GetRow(i).GetCell(j) as XSSFCell);
- if (dr[j] != null && dr[j].ToString() != string.Empty)
- {
- hasValue = true;
- }
- }
- if (hasValue)
- {
- dt.Rows.Add(dr);
- }
- }
- }
- return dt;
- }
- /// <summary>
- /// 将DataTable数据导出到Excel文件中(xlsx)
- /// </summary>
- /// <param name="dt"></param>
- /// <param name="file"></param>
- public static void TableToExcelForXLSX(DataTable dt, string file)
- {
- XSSFWorkbook xssfworkbook = new XSSFWorkbook();
- ISheet sheet = xssfworkbook.CreateSheet("Test");
- //表头
- IRow row = sheet.CreateRow(0);
- for (int i = 0; i < dt.Columns.Count; i++)
- {
- ICell cell = row.CreateCell(i);
- cell.SetCellValue(dt.Columns[i].ColumnName);
- }
- //数据
- for (int i = 0; i < dt.Rows.Count; i++)
- {
- IRow row1 = sheet.CreateRow(i + 1);
- for (int j = 0; j < dt.Columns.Count; j++)
- {
- ICell cell = row1.CreateCell(j);
- cell.SetCellValue(dt.Rows[i][j].ToString());
- }
- }
- //转为字节数组
- MemoryStream stream = new MemoryStream();
- xssfworkbook.Write(stream);
- var buf = stream.ToArray();
- //保存为Excel文件
- using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write))
- {
- fs.Write(buf, 0, buf.Length);
- fs.Flush();
- }
- }
- /// <summary>
- /// 获取单元格类型(xlsx)
- /// </summary>
- /// <param name="cell"></param>
- /// <returns></returns>
- private static object GetValueTypeForXLSX(XSSFCell cell)
- {
- if (cell == null)
- return null;
- switch (cell.CellType)
- {
- case CellType.BLANK: //BLANK:
- return null;
- case CellType.BOOLEAN: //BOOLEAN:
- return cell.BooleanCellValue;
- case CellType.NUMERIC: //NUMERIC:
- return cell.NumericCellValue;
- case CellType.STRING: //STRING:
- return cell.StringCellValue;
- case CellType.ERROR: //ERROR:
- return cell.ErrorCellValue;
- case CellType.FORMULA: //FORMULA:
- default:
- return "=" + cell.CellFormula;
- }
- }
注意:操作Excel2003与操作Excel2007使用的是不同的命名空间下的内容
使用NPOI.HSSF.UserModel空间下的HSSFWorkbook操作Excel2003
使用NPOI.XSSF.UserModel空间下的XSSFWorkbook操作Excel2007
在C#中使用NPOI2.0操作Excel2003和Excel2007
时间: 2024-10-05 04:30:30