- 一、引用插件NPOI.dll、NPOI.OOXML.dll、NPOI.OpenXml4Net.dll、NPOI.OpenXmlFormats.dll
插件下载地址:https://pan.baidu.com/s/1nw2mvBr 提取密码:kg32
- 二、定义通用类XlsxExcelData.cs
public class XlsxExcelData:IExcelData { #region 属性值 private Dictionary<string, DataTable> m_tableDic; public Dictionary<string, DataTable> DataTableDictionary { get { return m_tableDic; } } public List<string> SheetNames { get { if (m_tableDic == null) return null; return m_tableDic.Keys.ToList(); } } public List<DataTable> DataTableList { get { if (m_tableDic == null) return null; return m_tableDic.Values.ToList(); } } public int SheetCount { get { if (m_tableDic == null) return 0; return SheetNames.Count; } } private string m_filePath; public string FilePath { get { return m_filePath; } } private Stream m_stream; public Stream ExcelStream { get { return m_stream; } } public ExcelType ExcelType { get { return Interface.ExcelType.xlsx; } } #endregion #region 构造 public XlsxExcelData(string path) { m_filePath = path; } public XlsxExcelData(Stream stream) { m_stream = stream; } #endregion #region 方法 public List<Dictionary<string, string>> DataTableToDictionary(DataTable dt) { List<Dictionary<String, String>> dicList = new List<Dictionary<string, string>>(); foreach (DataRow row in dt.Rows) { Dictionary<String, String> dic = new Dictionary<String, String>(); foreach (DataColumn col in dt.Columns) { dic.Add(col.ColumnName, row[col].ToString()); } dicList.Add(dic); } return dicList; } /// <summary> /// 执行方法 /// </summary> public void Load() { if (m_filePath != null) Load(m_filePath); else Load(m_stream); } /// <summary> /// 执行方法 /// </summary> /// <param name="path">文件路径</param> public void Load(string path) { m_filePath = path; ExcelPackage package = null; try { using (FileStream fs=File.Open(path,FileMode.OpenOrCreate,FileAccess.Read)) { package = new ExcelPackage(fs); } } catch { throw; } LoadExcel(package); package.Dispose(); } /// <summary> /// 执行方法 /// </summary> /// <param name="stream">文件流</param> private void Load(Stream stream) { m_stream = stream; ExcelPackage package = null; try { package = new ExcelPackage(stream); } catch { throw; } LoadExcel(package); package.Dispose(); } /// <summary> /// 获取Excel对应字典 /// </summary> /// <param name="package"></param> private void LoadExcel(ExcelPackage package) { m_tableDic = new Dictionary<string, DataTable>(); var sheets = package.Workbook.Worksheets.GetEnumerator(); while (sheets.MoveNext()) { DataTable dt = new DataTable(); var sheet = sheets.Current; string name = sheet.Name; if (sheet.Dimension!=null) { for (int i = 1; i <=sheet.Dimension.Columns ; i++) { string header = ExcelHeaderGenerator.GetExcelHeader(i); DataColumn col = new DataColumn(header); dt.Columns.Add(col); } for (int i = 1; i <= sheet.Dimension.Rows ; i++) { try { ExcelRow excelRow = sheet.Row(i); DataRow dRow = dt.NewRow(); for (int j = 1; j <=sheet.Dimension.Columns; j++) { ExcelRange range = sheet.Cells[i, j]; if (string.IsNullOrEmpty(range.Text)) { dRow[j - 1] = string.Empty; } else { dRow[j - 1] = range.Text; } } dt.Rows.Add(dRow); } catch (Exception e) { throw; } } } m_tableDic.Add(name, dt); } } /// <summary> /// 获取第一列 /// </summary> /// <returns></returns> public List<Dictionary<string, string>> GetFirstRecords() { List<Dictionary<string, string>> result = new List<Dictionary<string, string>>(); DataTable dt = GetDataTable(0, 1); foreach (DataRow row in dt.Rows) { Dictionary<string, string> dic = new Dictionary<string, string>(); foreach (DataColumn column in dt.Columns) { dic.Add(column.ColumnName, row[column].ToString()); } result.Add(dic); } return result; } /// <summary> /// 获取DataTable /// </summary> /// <param name="sheetIndex">工作薄索引</param> /// <param name="columnNum">列数</param> /// <returns></returns> public DataTable GetDataTable(int sheetIndex, int columnNum) { DataTable dt = GetDataTable(sheetIndex); Convert(columnNum, ref dt); return dt; } /// <summary> /// 获取DataTable /// </summary> /// <param name="sheetIndex">工作薄索引</param> /// <returns></returns> public DataTable GetDataTable(int sheetIndex) { if (m_tableDic == null) return null; if (sheetIndex >= SheetCount) throw new Exception("表格索引超出序列,当前索引数量为" + SheetCount); DataTable dt = DataTableList[sheetIndex]; DataTable dt_copy = new DataTable(); foreach (DataColumn col in dt.Rows) { dt_copy.Columns.Add(new DataColumn(col.ColumnName)); } foreach (DataRow row in dt.Rows) { DataRow r = dt_copy.NewRow(); r.ItemArray = row.ItemArray; dt_copy.Rows.Add(r); } return dt_copy; } /// <summary> /// 检测重复列 /// </summary> /// <param name="colNum">列数</param> /// <param name="dt">DataTable</param> private void Convert(int colNum, ref DataTable dt) { if (colNum < 1) throw new Exception("指定作为标题的行数必须是大于0"); if (colNum > dt.Rows.Count) throw new Exception("指定作为标题的行数不能大于表格的总行数" + dt.Rows.Count); List<string> columnArray = new List<string>(); for (int i = 0; i < dt.Columns.Count; i++) { if (columnArray.Contains(dt.Rows[colNum - 1].ItemArray[i].ToString())) throw new Exception("指定为DataTable标题的行不能存在重复值,重复值为" + dt.Rows[colNum - 1].ItemArray[i].ToString()); columnArray.Add(dt.Rows[colNum - 1].ItemArray[i].ToString()); } int r = 0; for (int i = 0; i < colNum; i++) { dt.Rows.RemoveAt(i - r); r++; } for (int i = 0; i < columnArray.Count; i++) { dt.Columns[i].ColumnName = columnArray[i]; } } #endregion }
原著:清风一人醉http://www.cnblogs.com/W--Jing/
以上方法可以个人分享研究!
不可做商业项目,违者必究!
原文地址:https://www.cnblogs.com/W--Jing/p/8436122.html
时间: 2024-10-01 03:55:05