取消

asp.net core导出导入excel

使用NPOI导入导出excel,已经封装好Action可以直接调用


导出

效果图

使用方法

定义导出实体

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
class Student
{
    public int Id { get; set; }

    public string Name { get; set; }

    public bool IsBanZhang { get; set; }

    public static IEnumerable<Student> GetStudents()
    {
        return new List<Student>
        {
                new Student{Name="小强",Id=1,IsBanZhang=false},
        new Student{Name="小文",Id=2,IsBanZhang=true},
        new Student{Name="小黄",Id=3,IsBanZhang=false},
        new Student{Name="小刚",Id=3,IsBanZhang=false},
        };
    }
}

导出Action

1
2
3
4
5
6
7
8
9
10
11
12
13
14
public IActionResult DownExcel()
{
    var list = Student.GetStudents();
    var excelHeper = new ExcelHelper();
    var config = new List<ExcelGridModel> {
            new ExcelGridModel{name="Id",label="学号", align="left",},
            new ExcelGridModel{name="Name",label="姓名", align="left",},
            new ExcelGridModel{name="IsBanZhang",label="是否班长", align="left",},
    };

    var fileName = "a.excel";

    return excelHeper.ExcelDownload(list, config, fileName);
}

主要代码

导入导出代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
/// <summary>
/// 描 述:NPOI Excel DataTable操作类
/// </summary>
public class ExcelHelper
{
    #region Excel导出方法 ExcelDownload

    /// <summary>
    /// Excel导出下载
    /// </summary>
    /// <typeparam name="T">数据类型</typeparam>
    /// <param name="list">数据源</param>
    /// <param name="columnJson">导出列</param>
    /// <param name="fileName">下载文件名称</param>
    public ActionResult ExcelDownload<T>(IEnumerable<T> list, IEnumerable<ExcelGridModel> columnList, string fileName)
    {
        var excelConfig = ConvertExcelGridModelToConfig(columnList, fileName);

        var rowData = list.ToDataTable(columnList.Select(i => i.name));

        var stream = ExportMemoryStream(rowData, excelConfig);
        return new FileStreamResult(stream, MIMEType.xls) { FileDownloadName = JointXls(fileName) };

    }

    /// <summary>
    /// Excel导出下载
    /// </summary>
    /// <param name="dtSource">DataTable数据源</param>
    /// <param name="excelConfig">导出设置包含文件名、标题、列设置</param>
    public ActionResult ExcelDownload(DataTable dtSource, IEnumerable<ExcelGridModel> columnList, string fileName)
    {
        var excelConfig = ConvertExcelGridModelToConfig(columnList, fileName);
        var stream = ExportMemoryStream(dtSource, excelConfig);
        return new FileStreamResult(stream, MIMEType.xls) { FileDownloadName = JointXls(fileName) };
    }

    /// <summary>
    /// Excel导出下载
    /// </summary>
    /// <param name="dtSource">DataTable数据源</param>
    /// <param name="excelConfig">导出设置包含文件名、标题、列设置</param>
    public ActionResult ExcelDownload(DataTable dtSource, ExcelConfig excelConfig, string fileName)
    {
        var stream = ExportMemoryStream(dtSource, excelConfig);
        return new FileStreamResult(stream, MIMEType.xls) { FileDownloadName = JointXls(fileName) };
    }

    #endregion Excel导出方法 ExcelDownload

    #region DataTable导出到Excel文件excelConfigFileName设置为全路径

    /// <summary>
    /// DataTable导出到Excel文件 Export()
    /// </summary>
    /// <param name="dtSource">DataTable数据源</param>
    /// <param name="excelConfig">导出设置包含文件名、标题、列设置</param>
    public string ExcelExportToFile(DataTable dtSource, ExcelConfig excelConfig, string fileName)
    {
        fileName = JointXls(fileName);
        using (MemoryStream ms = ExportMemoryStream(dtSource, excelConfig))
        {
            using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
            {
                byte[] data = ms.ToArray();
                fs.Write(data, 0, data.Length);
                fs.Flush();
            }
        }

        return fileName;
    }


    #endregion DataTable导出到Excel文件excelConfigFileName设置为全路径

    #region DataTable导出到ExcelMemoryStream

    /// <summary>
    /// DataTable导出到Excel的MemoryStream Export()
    /// </summary>
    /// <param name="dtSource">DataTable数据源</param>
    /// <param name="excelConfig">导出设置包含文件名、标题、列设置</param>
    public MemoryStream ExportMemoryStream(DataTable dtSource, ExcelConfig excelConfig)
    {
        var columnEntity = excelConfig.ColumnEntity;
        if (columnEntity == null || columnEntity.Count == 0)
        {
            if (columnEntity == null)
            {
                columnEntity = new List<ColumnModel>();
            }

            foreach (DataColumn dc in dtSource.Columns)
            {
                columnEntity.Add(new ColumnModel
                {
                    Alignment = "center",
                    Column = dc.ColumnName,
                    ExcelColumn = dc.ColumnName
                });
            }
        }
        else
        {
            int colint = 0;
            for (int i = 0; i < dtSource.Columns.Count;)
            {
                DataColumn column = dtSource.Columns[i];
                if (excelConfig.ColumnEntity[colint].Column != column.ColumnName)
                {
                    dtSource.Columns.Remove(column.ColumnName);
                }
                else
                {
                    i++;
                    if (colint < excelConfig.ColumnEntity.Count - 1)
                    {
                        colint++;
                    }
                }
            }
        }

        HSSFWorkbook workbook = new HSSFWorkbook();
        ISheet sheet = workbook.CreateSheet();

        #region 右击文件 属性信息

        {
            DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
            dsi.Company = "NPOI";
            workbook.DocumentSummaryInformation = dsi;

            SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            si.Author = ""; //填加xls文件作者信息
            si.ApplicationName = ""; //填加xls文件创建程序信息
            si.LastAuthor = ""; //填加xls文件最后保存者信息
            si.Comments = ""; //填加xls文件作者信息
            si.Title = ""; //填加xls文件标题信息
            si.Subject = "";//填加文件主题信息
            si.CreateDateTime = System.DateTime.Now;
            workbook.SummaryInformation = si;
        }

        #endregion 右击文件 属性信息

        #region 设置标题样式

        ICellStyle headStyle = workbook.CreateCellStyle();
        int[] arrColWidth = new int[dtSource.Columns.Count];
        string[] arrColName = new string[dtSource.Columns.Count];//列名
        ICellStyle[] arryColumStyle = new ICellStyle[dtSource.Columns.Count];//样式表
        headStyle.Alignment = HorizontalAlignment.Center; // ------------------
        if (excelConfig.Background != new Color())
        {
            if (excelConfig.Background != new Color())
            {
                headStyle.FillPattern = FillPattern.SolidForeground;
                headStyle.FillForegroundColor = GetXLColour(workbook, excelConfig.Background);
            }
        }
        IFont font = workbook.CreateFont();
        font.FontHeightInPoints = excelConfig.TitlePoint;
        if (excelConfig.ForeColor != new Color())
        {
            font.Color = GetXLColour(workbook, excelConfig.ForeColor);
        }
        font.Boldweight = 700;
        headStyle.SetFont(font);

        #endregion 设置标题样式

        #region 列头及样式

        ICellStyle cHeadStyle = workbook.CreateCellStyle();
        cHeadStyle.Alignment = HorizontalAlignment.Center; // ------------------
        IFont cfont = workbook.CreateFont();
        cfont.FontHeightInPoints = excelConfig.HeadPoint;
        cHeadStyle.SetFont(cfont);

        #endregion 列头及样式

        #region 设置内容单元格样式

        foreach (DataColumn item in dtSource.Columns)
        {
            ICellStyle columnStyle = workbook.CreateCellStyle();
            columnStyle.Alignment = HorizontalAlignment.Center;
            arrColWidth[item.Ordinal] = Encoding.UTF8.GetBytes(item.ColumnName.ToString()).Length;
            arrColName[item.Ordinal] = item.ColumnName.ToString();
            if (excelConfig.ColumnEntity != null)
            {
                ColumnModel columnentity = excelConfig.ColumnEntity.Find(t => t.Column == item.ColumnName);
                if (columnentity != null)
                {
                    arrColName[item.Ordinal] = columnentity.ExcelColumn;
                    if (columnentity.Width != 0)
                    {
                        arrColWidth[item.Ordinal] = columnentity.Width;
                    }
                    if (columnentity.Background != new Color())
                    {
                        if (columnentity.Background != new Color())
                        {
                            columnStyle.FillPattern = FillPattern.SolidForeground;
                            columnStyle.FillForegroundColor = GetXLColour(workbook, columnentity.Background);
                        }
                    }
                    if (columnentity.Font != null || columnentity.Point != 0 || columnentity.ForeColor != new Color())
                    {
                        IFont columnFont = workbook.CreateFont();
                        columnFont.FontHeightInPoints = 10;
                        if (columnentity.Font != null)
                        {
                            columnFont.FontName = columnentity.Font;
                        }
                        if (columnentity.Point != 0)
                        {
                            columnFont.FontHeightInPoints = columnentity.Point;
                        }
                        if (columnentity.ForeColor != new Color())
                        {
                            columnFont.Color = GetXLColour(workbook, columnentity.ForeColor);
                        }
                        columnStyle.SetFont(font);
                    }
                    columnStyle.Alignment = getAlignment(columnentity.Alignment);
                }
            }
            arryColumStyle[item.Ordinal] = columnStyle;
        }
        if (excelConfig.IsAllSizeColumn)
        {
            #region 根据列中最长列的长度取得列宽

            for (int i = 0; i < dtSource.Rows.Count; i++)
            {
                for (int j = 0; j < dtSource.Columns.Count; j++)
                {
                    if (arrColWidth[j] != 0)
                    {
                        int intTemp = Encoding.UTF8.GetBytes(dtSource.Rows[i][j].ToString()).Length;
                        if (intTemp > arrColWidth[j])
                        {
                            arrColWidth[j] = intTemp;
                        }
                    }
                }
            }

            #endregion 根据列中最长列的长度取得列宽
        }

        #endregion 设置内容单元格样式

        int rowIndex = 0;

        #region 表头及样式

        if (excelConfig.Title != null)
        {
            IRow headerRow = sheet.CreateRow(rowIndex);
            rowIndex++;
            if (excelConfig.TitleHeight != 0)
            {
                headerRow.Height = (short)(excelConfig.TitleHeight * 20);
            }
            headerRow.HeightInPoints = 25;
            headerRow.CreateCell(0).SetCellValue(excelConfig.Title);
            headerRow.GetCell(0).CellStyle = headStyle;
            sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1)); // ------------------
        }

        #endregion 表头及样式

        #region 列头及样式

        {
            IRow headerRow = sheet.CreateRow(rowIndex);
            rowIndex++;

            #region 如果设置了列标题就按列标题定义列头,没定义直接按字段名输出

            foreach (DataColumn column in dtSource.Columns)
            {
                headerRow.CreateCell(column.Ordinal).SetCellValue(arrColName[column.Ordinal]);
                headerRow.GetCell(column.Ordinal).CellStyle = cHeadStyle;
                //设置列宽
                sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
            }

            #endregion 如果设置了列标题就按列标题定义列头,没定义直接按字段名输出
        }

        #endregion 列头及样式

        ICellStyle dateStyle = workbook.CreateCellStyle();
        IDataFormat format = workbook.CreateDataFormat();
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

        foreach (DataRow row in dtSource.Rows)
        {
            #region 新建表,填充表头,填充列头,样式

            if (rowIndex == 65535)
            {
                sheet = workbook.CreateSheet();
                rowIndex = 0;

                #region 表头及样式

                {
                    if (excelConfig.Title != null)
                    {
                        IRow headerRow = sheet.CreateRow(rowIndex);
                        rowIndex++;
                        if (excelConfig.TitleHeight != 0)
                        {
                            headerRow.Height = (short)(excelConfig.TitleHeight * 20);
                        }
                        headerRow.HeightInPoints = 25;
                        headerRow.CreateCell(0).SetCellValue(excelConfig.Title);
                        headerRow.GetCell(0).CellStyle = headStyle;
                        sheet.AddMergedRegion(new NPOI.SS.Util.CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1)); // ------------------
                    }
                }

                #endregion 表头及样式

                #region 列头及样式

                {
                    IRow headerRow = sheet.CreateRow(rowIndex);
                    rowIndex++;

                    #region 如果设置了列标题就按列标题定义列头,没定义直接按字段名输出

                    foreach (DataColumn column in dtSource.Columns)
                    {
                        headerRow.CreateCell(column.Ordinal).SetCellValue(arrColName[column.Ordinal]);
                        headerRow.GetCell(column.Ordinal).CellStyle = cHeadStyle;
                        //设置列宽
                        sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                    }

                    #endregion 如果设置了列标题就按列标题定义列头,没定义直接按字段名输出
                }

                #endregion 列头及样式
            }

            #endregion 新建表,填充表头,填充列头,样式

            #region 填充内容

            IRow dataRow = sheet.CreateRow(rowIndex);
            foreach (DataColumn column in dtSource.Columns)
            {
                ICell newCell = dataRow.CreateCell(column.Ordinal);
                newCell.CellStyle = arryColumStyle[column.Ordinal];
                string drValue = row[column].ToString();
                SetCell(newCell, dateStyle, column.DataType, drValue);
            }

            #endregion 填充内容

            rowIndex++;
        }
        //using (MemoryStream ms = new MemoryStream())
        {
            MemoryStream ms = new MemoryStream();
            workbook.Write(ms);
            ms.Flush();
            ms.Position = 0;
            return ms;
        }
    }

    #endregion DataTable导出到ExcelMemoryStream


    #region 设置表格内容

    private void SetCell(ICell newCell, ICellStyle dateStyle, Type dataType, string drValue)
    {
        switch (dataType.ToString())
        {
            case "System.String"://字符串类型
                newCell.SetCellValue(drValue);
                break;

            case "System.DateTime"://日期类型
                System.DateTime dateV;
                if (System.DateTime.TryParse(drValue, out dateV))
                {
                    newCell.SetCellValue(dateV);
                }
                else
                {
                    newCell.SetCellValue("");
                }
                newCell.CellStyle = dateStyle;//格式化显示
                break;

            case "System.Boolean"://布尔型
                bool boolV = false;
                bool.TryParse(drValue, out boolV);
                newCell.SetCellValue(boolV);
                break;

            case "System.Int16"://整型
            case "System.Int32":
            case "System.Int64":
            case "System.Byte":
                int intV = 0;
                int.TryParse(drValue, out intV);
                newCell.SetCellValue(intV);
                break;

            case "System.Decimal"://浮点型
            case "System.Double":
                double doubV = 0;
                double.TryParse(drValue, out doubV);
                newCell.SetCellValue(doubV);
                break;

            case "System.DBNull"://空值处理
                newCell.SetCellValue("");
                break;

            default:
                newCell.SetCellValue("");
                break;
        }
    }

    #endregion 设置表格内容

    #region Excel导入
    /// <summary>
    /// 读取excel ,默认第一行为标头
    /// </summary>
    /// <param name="strFileName">excel文档路径</param>
    /// <returns></returns>
    public DataTable ExcelImport(string strFileName)
    {
        return ExcelImport(strFileName, 0);
    }

    /// <summary>
    /// 读取excel ,默认第一行为标头
    /// </summary>
    /// <param name="strFileName">excel文档路径</param>
    /// <param name="headerRowNo">标题行号,以0开始</param>
    /// <returns></returns>
    public DataTable ExcelImport(string strFileName, int headerRowNo)
    {
        ISheet sheet;
        using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
        {
            if (strFileName.IndexOf(".xlsx", StringComparison.Ordinal) == -1)//2003
            {
                HSSFWorkbook hssfworkbook = new HSSFWorkbook(file);
                sheet = hssfworkbook.GetSheetAt(0);
            }
            else//2007
            {
                XSSFWorkbook xssfworkbook = new XSSFWorkbook(file);
                sheet = xssfworkbook.GetSheetAt(0);
            }
        }

        return ReadSheetToDataTable(headerRowNo, sheet);
    }

    /// <summary>
    /// 读取excel ,默认第一行为标头
    /// </summary>
    /// <param name="fileStream">文件数据流</param>
    /// <returns></returns>
    public DataTable ExcelImport(Stream fileStream, string flieType)
    {
        return ExcelImport(fileStream, flieType, 0);
    }

    /// <summary>
    /// 读取excel ,默认第一行为标头
    /// </summary>
    /// <param name="fileStream">文件数据流</param>
    /// <param name="headerRowNo">标题行号从0开始</param>
    /// <returns></returns>
    public DataTable ExcelImport(Stream fileStream, string flieType, int headerRowNo)
    {
        DataTable dt = new DataTable();
        ISheet sheet = null;
        if (flieType == ".xls")
        {
            HSSFWorkbook hssfworkbook = new HSSFWorkbook(fileStream);
            sheet = hssfworkbook.GetSheetAt(0);
        }
        else
        {
            XSSFWorkbook xssfworkbook = new XSSFWorkbook(fileStream);
            sheet = xssfworkbook.GetSheetAt(0);
        }
        return ReadSheetToDataTable(headerRowNo, sheet);
    }

    /// <summary>
    /// 从sheet中读取数据到DataTable
    /// </summary>
    /// <param name="headerRowNo">标题行号(数据行号=标题行号+1)</param>
    /// <param name="sheet"></param>
    /// <returns></returns>
    private DataTable ReadSheetToDataTable(int headerRowNo, ISheet sheet)
    {
        var dt = new DataTable();
        IRow headerRow = sheet.GetRow(headerRowNo);
        int cellCount = headerRow.LastCellNum;

        for (int j = 0; j < cellCount; j++)
        {
            ICell cell = headerRow.GetCell(j);
            dt.Columns.Add(cell.ToString());
        }

        for (int i = (headerRowNo + 1); i <= sheet.LastRowNum; i++)
        {
            IRow row = sheet.GetRow(i);
            DataRow dataRow = dt.NewRow();

            for (int j = 0; j < cellCount; j++)
            {
                if (row.GetCell(j) == null)
                {
                    continue;
                }

                ICell cell = row.GetCell(j);
                if (cell.CellType == CellType.Error)
                {
                    throw new Exception($"第{i + 1}行,列【{dt.Columns[j].ColumnName}】,单元格格式错误");
                }
                else if (cell.CellType == CellType.Numeric && DateUtil.IsCellDateFormatted(cell))
                {
                    dataRow[j] = cell.DateCellValue;
                }
                else if (cell.CellType == CellType.Numeric)
                {
                    dataRow[j] = cell.NumericCellValue;
                }
                else if (cell.CellType == CellType.Blank)
                {
                    dataRow[j] = "";
                }
                else
                {
                    dataRow[j] = cell.StringCellValue;
                }

                //dataRow[j] = row.GetCell(j).ToString();
            }

            bool existsValue = false;
            foreach (DataColumn column in dt.Columns)
            {
                if (dataRow[column.ColumnName] == null || string.IsNullOrEmpty(dataRow[column.ColumnName].ToString()))
                {
                    continue;
                }

                existsValue = true;
                break;
            }
            if (existsValue)
            {
                dt.Rows.Add(dataRow);
            }
        }
        return dt;
    }

    #endregion Excel导入

    #region RGB颜色转NPOI颜色

    private short GetXLColour(HSSFWorkbook workbook, Color SystemColour)
    {
        short s = 0;
        HSSFPalette XlPalette = workbook.GetCustomPalette();
        NPOI.HSSF.Util.HSSFColor XlColour = XlPalette.FindColor(SystemColour.R, SystemColour.G, SystemColour.B);
        if (XlColour == null)
        {
            if (NPOI.HSSF.Record.PaletteRecord.STANDARD_PALETTE_SIZE < 255)
            {
                XlColour = XlPalette.FindSimilarColor(SystemColour.R, SystemColour.G, SystemColour.B);
                s = XlColour.Indexed;
            }
        }
        else
        {
            s = XlColour.Indexed;
        }

        return s;
    }

    #endregion RGB颜色转NPOI颜色

    #region 设置列的对齐方式

    /// <summary>
    /// 设置对齐方式
    /// </summary>
    /// <param name="style"></param>
    /// <returns></returns>
    private HorizontalAlignment getAlignment(string style)
    {
        switch (style)
        {
            case "center":
                return HorizontalAlignment.Center;

            case "left":
                return HorizontalAlignment.Left;

            case "right":
                return HorizontalAlignment.Right;

            case "fill":
                return HorizontalAlignment.Fill;

            case "justify":
                return HorizontalAlignment.Justify;

            case "centerselection":
                return HorizontalAlignment.CenterSelection;

            case "distributed":
                return HorizontalAlignment.Distributed;
        }
        return NPOI.SS.UserModel.HorizontalAlignment.General;
    }

    #endregion 设置列的对齐方式


    #region 辅助方法
    /// <summary>
    /// 如果文件名中没有后缀名,增加文件后缀名
    /// </summary>
    /// <param name="fileName"></param>
    /// <returns></returns>
    private string JointXls(string fileName)
    {
        if (!fileName.EndsWith(".xls"))
        {
            fileName += ".xls";
        }

        return fileName;
    }

    private ExcelConfig ConvertExcelGridModelToConfig(IEnumerable<ExcelGridModel> columnList, string fileName)
    {
        ExcelConfig excelconfig = new ExcelConfig();
        excelconfig.Title = fileName;
        excelconfig.TitleFont = "微软雅黑";
        excelconfig.TitlePoint = 15;
        excelconfig.IsAllSizeColumn = true;
        excelconfig.ColumnEntity = new List<ColumnModel>();
        foreach (ExcelGridModel columnModel in columnList)
        {
            excelconfig.ColumnEntity.Add(new ColumnModel()
            {
                Column = columnModel.name,
                ExcelColumn = columnModel.label,
                Alignment = columnModel.align,
            });
        }

        return excelconfig;
    }

    /// <summary>
    /// MIME文件类型
    /// </summary>
    class MIMEType
    {
        public const string xls = "application/ms-excel";
    }
    #endregion
}

配置类型

ExcelConfig

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
/// <summary>
/// 描 述:Excel导入导出设置
/// </summary>
public class ExcelConfig
{    
    /// <summary>
    /// 标题
    /// </summary>
    public string Title { get; set; }
    /// <summary>
    /// 前景色
    /// </summary>
    public Color ForeColor { get; set; }
    /// <summary>
    /// 背景色
    /// </summary>
    public Color Background { get; set; }
    private short _titlepoint;
    /// <summary>
    /// 标题字号
    /// </summary>
    public short TitlePoint
    {
        get
        {
            if (_titlepoint == 0)
            {
                return 20;
            }
            else
            {
                return _titlepoint;
            }
        }
        set { _titlepoint = value; }
    }
    private short _headpoint;
    /// <summary>
    /// 列头字号
    /// </summary>
    public short HeadPoint
    {
        get
        {
            if (_headpoint == 0)
            {
                return 10;
            }
            else
            {
                return _headpoint;
            }
        }
        set { _headpoint = value; }
    }
    /// <summary>
    /// 标题高度
    /// </summary>
    public short TitleHeight { get; set; }
    /// <summary>
    /// 列标题高度
    /// </summary>
    public short HeadHeight { get; set; }
    private string _titlefont;
    /// <summary>
    /// 标题字体
    /// </summary>
    public string TitleFont
    {
        get
        {
            if (_titlefont == null)
            {
                return "微软雅黑";
            }
            else
            {
                return _titlefont;
            }
        }
        set { _titlefont = value; }
    }
    private string _headfont;
    /// <summary>
    /// 列头字体
    /// </summary>
    public string HeadFont
    {
        get
        {
            if (_headfont == null)
            {
                return "微软雅黑";
            }
            else
            {
                return _headfont;
            }
        }
        set { _headfont = value; }
    }
    /// <summary>
    /// 是否按内容长度来适应表格宽度
    /// </summary>
    public bool IsAllSizeColumn { get; set; }
    /// <summary>
    /// 列设置
    /// </summary>
    public List<ColumnModel> ColumnEntity { get; set; }

}

ColumnModel

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/// <summary>
/// 描 述:Excel导入导出列设置模型
/// </summary>
public class ColumnModel
{
    /// <summary>
    /// 列名
    /// </summary>
    public string Column { get; set; }
    /// <summary>
    /// Excel列名
    /// </summary>
    public string ExcelColumn { get; set; }
    /// <summary>
    /// 宽度
    /// </summary>
    public int Width { get; set; }
    /// <summary>
    /// 前景色
    /// </summary>
    public Color ForeColor { get; set; }
    /// <summary>
    /// 背景色
    /// </summary>
    public Color Background { get; set; }
    /// <summary>
    /// 字体
    /// </summary>
    public string Font { get; set; }
    /// <summary>
    /// 字号
    /// </summary>
    public short Point { get; set; }
    /// <summary>
    ///对齐方式
    ///left 左
    ///center 中间
    ///right 右
    ///fill 填充
    ///justify 两端对齐
    ///centerselection 跨行居中
    ///distributed
    /// </summary>
    public string Alignment { get; set; }
}

ExcelGridModel

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
public class ExcelGridModel
{
    /// <summary>
    /// 属性名称
    /// </summary>
    public string name { get; set; }
    /// <summary>
    /// excel列名
    /// </summary>
    public string label { get; set; }
    /// <summary>
    /// 宽度
    /// </summary>
    public string width { get; set; }
    /// <summary>
    /// 对其方式
    /// </summary>
    public string align { get; set; }
    /// <summary>
    /// 高度
    /// </summary>
    public string height { get; set; }
    /// <summary>
    /// 是否隐藏
    /// </summary>
    public string hidden { get; set; }
}

示例下载地址:

代码打包下载

本文会经常更新,请阅读原文: https://dashenxian.github.io/post/asp.net-core%E5%AF%BC%E5%87%BA%E5%AF%BC%E5%85%A5excel ,以避免陈旧错误知识的误导,同时有更好的阅读体验。

知识共享许可协议

本作品采用 知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议 进行许可。欢迎转载、使用、重新发布,但务必保留文章署名 小神仙 (包含链接: https://dashenxian.github.io ),不得用于商业目的,基于本文修改后的作品务必以相同的许可发布。如有任何疑问,请 与我联系 (125880321@qq.com)

登录 GitHub 账号进行评论