using DocumentFormat.OpenXml; using DocumentFormat.OpenXml.Packaging; using DocumentFormat.OpenXml.Spreadsheet; using System; using System.Collections.Generic; using System.Data; using System.Linq; using System.Reflection; using System.Text; namespace Tools { /// <summary> /// /// </summary> public class ExcelOpenXml { /* * excel 对象结构 * SpreadsheetDocument * 》WorkbookPart * 》WorksheetPart * 》Worksheet * 》SheetData * 》WorksheetPart * 》Worksheet * 》SheetData1 * 》Workbook * 》Sheets * 》Sheet */ public static void Create(string filename, DataSet ds) { SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Create(filename, SpreadsheetDocumentType.Workbook); WorkbookPart workbookpart = spreadsheetDocument.AddWorkbookPart(); Workbook workbook = new Workbook(); Sheets sheets = new Sheets(); #region 创建多个 sheet 页 //创建多个sheet for (int s = 0; s < ds.Tables.Count; s++) { DataTable dt = ds.Tables[s]; var tname = dt.TableName; WorksheetPart worksheetPart = workbookpart.AddNewPart<WorksheetPart>(); Worksheet worksheet = new Worksheet(); SheetData sheetData = new SheetData(); //创建 sheet 页 Sheet sheet = new Sheet() { //页面关联的 WorksheetPart Id = spreadsheetDocument.WorkbookPart.GetIdOfPart(worksheetPart), SheetId = UInt32Value.FromUInt32((uint)s + 1), Name = tname }; sheets.Append(sheet); #region 创建sheet 行 Row row; uint rowIndex = 1; //添加表头 row = new Row() { RowIndex = UInt32Value.FromUInt32(rowIndex++) }; sheetData.Append(row); for (int i = 0; i < dt.Columns.Count; i++) { Cell newCell = new Cell(); newCell.CellValue = new CellValue(dt.Columns[i].ColumnName); newCell.DataType = new EnumValue<CellValues>(CellValues.String); row.Append(newCell); } //添加内容 object val = null; for (int i = 0; i < dt.Rows.Count; i++) { row = new Row() { RowIndex = UInt32Value.FromUInt32(rowIndex++) }; sheetData.Append(row); for (int j = 0; j < dt.Columns.Count; j++) { Cell newCell = new Cell(); val = dt.Rows[i][j]; newCell.CellValue = new CellValue(val.ToString()); newCell.DataType = new EnumValue<CellValues>(CellValues.String); row.Append(newCell); } } #endregion worksheet.Append(sheetData); worksheetPart.Worksheet = worksheet; worksheetPart.Worksheet.Save(); } #endregion workbook.Append(sheets); workbookpart.Workbook = workbook; workbookpart.Workbook.Save(); spreadsheetDocument.Close(); } public static DataTable GetSheet(string filename, string sheetName) { DataTable dt = new DataTable(); using (SpreadsheetDocument document = SpreadsheetDocument.Open(filename, false)) { WorkbookPart wbPart = document.WorkbookPart; //通过sheet名查找 sheet页 Sheet sheet = wbPart .Workbook .Descendants<Sheet>() .Where(s => s.Name == sheetName) .FirstOrDefault(); if (sheet == null) { throw new ArgumentException("未能找到" + sheetName + " sheet 页"); } //获取Excel中共享表 SharedStringTablePart sharedStringTablePart = wbPart .GetPartsOfType<SharedStringTablePart>() .FirstOrDefault(); SharedStringTable sharedStringTable = null; if (sharedStringTablePart != null) sharedStringTable = sharedStringTablePart.SharedStringTable; #region 构建datatable //添加talbe列,返回列数 Func<Row, int> addTabColumn = (r) => { //遍历单元格 foreach (Cell c in r.Elements<Cell>()) { dt.Columns.Add(GetCellVal(c, sharedStringTable)); } return dt.Columns.Count; }; //添加行 Action<Row> addTabRow = (r) => { DataRow dr = dt.NewRow(); int colIndex = 0; int colCount = dt.Columns.Count; //遍历单元格 foreach (Cell c in r.Elements<Cell>()) { if (colIndex >= colCount) break; dr[colIndex++] = GetCellVal(c, sharedStringTable); } dt.Rows.Add(dr); }; #endregion //通过 sheet.id 查找 WorksheetPart WorksheetPart worksheetPart = wbPart.GetPartById(sheet.Id) as WorksheetPart; //查找 sheetdata SheetData sheetData = worksheetPart.Worksheet.Elements<SheetData>().First(); //遍历行 foreach (Row r in sheetData.Elements<Row>()) { //构建table列 if (r.RowIndex == 1) { addTabColumn(r); continue; } //构建table行 addTabRow(r); } } return dt; } /// <summary> /// 获取单元格值 /// </summary> /// <param name="cell"></param> /// <param name="sharedStringTable"></param> /// <returns></returns> static string GetCellVal(Cell cell, SharedStringTable sharedStringTable) { var val = cell.InnerText; if (cell.DataType != null) { switch (cell.DataType.Value) { //从共享表中获取值 case CellValues.SharedString: if (sharedStringTable != null) val = sharedStringTable .ElementAt(int.Parse(val)) .InnerText; break; default: val = string.Empty; break; } } return val; } public static DataSet ConvertToDataSet<T>(IList<T> list) { if (list == null || list.Count <= 0) { return null; } DataSet ds = new DataSet(); DataTable dt = new DataTable(typeof(T).Name); DataColumn column; DataRow row; System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance); foreach (T t in list) { if (t == null) { continue; } row = dt.NewRow(); for (int i = 0, j = myPropertyInfo.Length; i < j; i++) { System.Reflection.PropertyInfo pi = myPropertyInfo[i]; string name = pi.Name; if (dt.Columns[name] == null) { var type = pi.PropertyType; if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>)) { type = type.GetGenericArguments()[0]; } column = new DataColumn(name, type); dt.Columns.Add(column); } row[name] = pi.GetValue(t, null); } dt.Rows.Add(row); } ds.Tables.Add(dt); return ds; } public static List<T> ConvertToList<T>(DataTable dt) where T : new() { //定义集合 List<T> ts = new List<T>(); //获得此模型的类型 Type type = typeof(T); //定义一个临时的变量 string tempName = ""; //遍历datatable中所有数据行 foreach (DataRow dr in dt.Rows) { T t = new T(); //获得此模型的公共属性 PropertyInfo[] propertys = t.GetType().GetProperties(); //遍历所有属性 foreach (PropertyInfo pi in propertys) { //将此属性赋值给临时变量 tempName = pi.Name; //检查datatable是否包含此列 if (dt.Columns.Contains(tempName)) { //判断此属性是否有setter，这个啥意思呢，就是我们的实体层的{get;set;}如果我们的实体有了set方法，就说明可以赋值！ if (!pi.CanWrite) continue; { //取值 object value = dr[tempName]; if (value != DBNull.Value) pi.SetValue(t, value, null); } } } //对象添加到泛型集合中 ts.Add(t); } return ts; } } }
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