庆军之导出excel 利用npoi基于模板导出excel

不想废话。本来想用反射，试了一把。写的让我崩溃。最后小僧启发了我，我改用JObject来处理绑定的问题。源代码如下。垃圾代码，自己记录下。
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
public class WriteExcelDataDefine
        {
            public int RowIndex { get; set; }
            public int CellIndex { get; set; }
 
            /// <summary>
            /// 0空格不管
            /// 3子对象
            /// 4绑定对象
            /// 5常量
            /// </summary>
            public byte WriteType { get; set; }
 
            /// <summary>
            /// 0 单行
            /// 1 绑定多行
            /// </summary>
            public byte WriteMode { get; set; }
            public string DataType { get; set; }//data.fuck data 如果是固定字符 不填
            public string DataContent { get; set; }//data.fuck fuck 如果是固定字符 sss sss
 
            /// <summary>
            /// 占用行数
            /// </summary>
            public int MaxWriteRowCount { get; set; } = -1;
 
            /// <summary>
            /// 数据源行
            /// </summary>
            public int SourceCount { get; set; } = 1;
        }
 
        /// <summary>
        /// 解析Excel到数据绑定1
        /// </summary>
        /// <param name="filepath"></param>
        /// <returns></returns>
        /// <exception cref="Exception"></exception>
        public List<WriteExcelDataDefine> TemplatePareExcelDefineSetup1(string filepath)
        {
            if (!File.Exists(filepath))
            {
                throw new Exception("模板不存在");
            }
 
            IWorkbook workbook = null;
            //string extension = Path.GetExtension(url);
            using (FileStream fs = System.IO.File.OpenRead(filepath))
            {
                //把xlsx文件中的数据写入workbook中
                workbook = new XSSFWorkbook(fs);
            }
 
            ISheet sheet = workbook.GetSheetAt(0);//目前只支持一个sheet，并且在第一个
 
            List<WriteExcelDataDefine> writeExcelDatas = new List<WriteExcelDataDefine>(100);
 
            //Dictionary<Point, string> excelBind = new Dictionary<Point, string>(100);
            for (int rowindex = 0; rowindex <= sheet.LastRowNum; rowindex++)
            {
                IRow onerow = sheet.GetRow(rowindex);
                if (onerow == null)
                {
                    continue;
                }
 
                for (int colindex = 0; colindex < onerow.LastCellNum; colindex++)
                {
                    var onecellvalue = onerow.GetCell(colindex)?.ToString();
                    if (string.IsNullOrWhiteSpace(onecellvalue))
                    {
                        continue;
                    }
 
                    if (onecellvalue.StartsWith("#[")
                        && onecellvalue.EndsWith("]"
                        ))
                    {
                        if (onecellvalue.IndexOf(".") > 0)//可能是子对象
                        {
                            var datatypedefines = onecellvalue.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
                            if (datatypedefines.Length != 2)//不支持多层路径暂时或者写错了
                            {
                                writeExcelDatas.Add(new WriteExcelDataDefine()
                                {
                                    RowIndex = rowindex,
                                    CellIndex = colindex,
                                    DataContent = onecellvalue,
                                    DataType = "",
                                    MaxWriteRowCount = 1,
                                    WriteType = 5
                                });
                            }
                            else//
                            {
                                writeExcelDatas.Add(new WriteExcelDataDefine()
                                {
                                    RowIndex = rowindex,
                                    CellIndex = colindex,
                                    DataContent = datatypedefines[1].Replace("]", ""),
                                    DataType = datatypedefines[0].Replace("#[", ""),
                                    MaxWriteRowCount = -1,
                                    WriteType = 3
                                });
                            }
                        }
                        else
                        {
                            writeExcelDatas.Add(new WriteExcelDataDefine()
                            {
                                RowIndex = rowindex,
                                CellIndex = colindex,
                                DataContent = onecellvalue.Replace("#[", "").Replace("]", ""),
                                DataType = "",
                                MaxWriteRowCount = -1,
                                WriteType = 4
                            });
                        }
                    }
                    else//常量只能为一行 应该是非绑定值
                    {
                        writeExcelDatas.Add(new WriteExcelDataDefine()
                        {
                            RowIndex = rowindex,
                            CellIndex = colindex,
                            DataContent = onecellvalue,
                            DataType = "",
                            MaxWriteRowCount = 1,
                            WriteType = 5
                        });
                    }
                }
            }
 
            //删掉没有必要转换的常量行
            var orderbyRows = writeExcelDatas.GroupBy(q => q.RowIndex).OrderBy(q => q.Key);
            List<int> removeRowIndex = new List<int>(orderbyRows.Count());
            foreach (var item in orderbyRows)//按行来分析
            {
                if (item.All(q => q.WriteType == 5))
                {
                    removeRowIndex.Add(item.First().RowIndex);
                }
            }
 
            if (removeRowIndex.Count > 0)
            {
                foreach (var item in removeRowIndex)
                {
                    writeExcelDatas.RemoveAll(q => q.RowIndex == item);
                }
            }
 
            return writeExcelDatas;
        }
 
        public void DataBindPareExcelDefineSetup2(string filepath,
            List<WriteExcelDataDefine> excelDataDefines, object datas)
        {
             
 
            JToken data = JToken.FromObject(datas);
            //dynamic New = JObject.FromObject(data);
 
            //DataTable   dt = new DataTable();
            //Dictionary<string,string>
            //var t = typeof(T);
            Dictionary<string, int> mTableDefines = new Dictionary<string, int>(excelDataDefines.Count);
            var orderbyRows = excelDataDefines.GroupBy(q => q.RowIndex).OrderBy(q => q.Key);
 
            foreach (var item in orderbyRows)//按行来分析
            {
 
                var orderbyCells = item.OrderBy(q => q.CellIndex);//按列排序
                //找到所有的数据绑定
                //var alldatabindCells = orderbyCells.Where(q=>q.WriteType == 3 && q.WriteType == 4).Distinct().ToList();
                //var alltps = t.GetProperties();
                //var tName = t.GetName();
 
                //判断绑定对象的类型
                //if (TestIEnumerable(t))//需要循环
                //{
                setbindPObjects(data,
                    mTableDefines, orderbyCells);
 
                var maxrowCount = item.Max(q => q.MaxWriteRowCount);
                foreach (var cellname in item)
                {
                    cellname.MaxWriteRowCount = maxrowCount;
                }
 
            }//重新设置行
 
            IWorkbook workbook = null;
            //string extension = Path.GetExtension(url);
            using (FileStream fs = System.IO.File.OpenRead(filepath))
            {
                //把xlsx文件中的数据写入workbook中
                workbook = new XSSFWorkbook(fs);
            }
 
            ISheet sheet = workbook.GetSheetAt(0);//目前只支持一个sheet，并且在第一个
 
            int currentrowIndex = 0;//模板行所在的位置
            int addrowCount = 0;
 
 
            //开始渲染
            foreach (var item in orderbyRows)//按行来分析
            {
                //addrowCount += 1;
                var onerowitem = item.First();
 
 
                 
                for (int datarowindex = 0; datarowindex < onerowitem.MaxWriteRowCount; datarowindex++)
                {
 
 
                    currentrowIndex = addrowCount + onerowitem.RowIndex;
                    //重新计算了模板行的位置
 
                    IRow writeRow = null;
                    if (datarowindex == 0)//模板行所在，直接用
                    {
                        writeRow = sheet.GetRow(currentrowIndex);
                    }
                    else
                    {
                        sheet.CreateRow(currentrowIndex + 1);//新行
                        writeRow = sheet.CopyRow(currentrowIndex, currentrowIndex+1);//复制上一行到新行
                    }
 
 
                    //按列排序 写列的数据
                    foreach (var cellitem in item.OrderBy(q => q.CellIndex))
                    {
                        //写数据
                        if (cellitem.WriteType == 0) continue;
 
                        var writeCell = writeRow.GetCell(cellitem.CellIndex);
 
                        if (cellitem.WriteType == 5)//常量
                        {
                            writeCell.SetCellValue(cellitem.DataContent ?? "");
                            continue;
                        }//写入常量
 
                        if (cellitem.WriteType == 4)//绑定对象
                        {
                            if (cellitem.WriteMode == 0)//对象不是数组
                            {
                                if (data.Type == JTokenType.Array)
                                {
                                    writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent]?.ToString());
                                }
                                else
                                {
                                    writeCell.SetCellValue(((JObject)data)[cellitem.DataContent]?.ToString());
                                }
                            }
                            else//多行
                            {
                                if (data.Type == JTokenType.Array)
                                {
                                    //获取当前行
                                    //var currentjrow = 1;
                                    if (cellitem.SourceCount < datarowindex)
                                    {
                                        writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent]?.ToString());
                                    }
                                    else
                                    {
                                        writeCell.SetCellValue(((JArray)data)[datarowindex][cellitem.DataContent]?.ToString());
 
                                    }
                                }
                                else
                                {
                                    writeCell.SetCellValue(((JObject)data)[cellitem.DataContent]?.ToString());
                                }
                            }
                        }
 
                        if (cellitem.WriteType == 3)//子对象
                        {
                            if (cellitem.WriteMode == 0)//单行
                            {
                                if (data.Type == JTokenType.Array)
                                {
                                    var bindsonObj = ((JArray)data)[0][cellitem.DataType];
                                    if (bindsonObj.Type == JTokenType.Array)
                                    {
                                        //获取当前行
                                        writeCell.SetCellValue(((JArray)bindsonObj)[0][cellitem.DataContent]?.ToString());
                                    }
                                    else
                                    {
                                        writeCell.SetCellValue(bindsonObj[cellitem.DataContent]?.ToString());
                                    }
                                    //writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent].ToString());
                                }
                                else
                                {
                                    var bindsonObj = ((JObject)data)[cellitem.DataType];
                                    if (bindsonObj.Type == JTokenType.Array)
                                    {
                                        writeCell.SetCellValue(((JArray)bindsonObj)[0][cellitem.DataContent]?.ToString());
                                        //获取当前行
                                    }
                                    else
                                    {
                                        writeCell.SetCellValue(bindsonObj[cellitem.DataContent]?.ToString());
                                    }
                                }
                            }
                            else//多行
                            {
                                if (data.Type == JTokenType.Array)
                                {
                                    var bindsonObj = ((JArray)data)[0][cellitem.DataType];
                                    if (bindsonObj.Type == JTokenType.Array)
                                    {
 
                                        if (cellitem.SourceCount < datarowindex)
                                        {
                                            writeCell.SetCellValue(((JArray)bindsonObj)[0][cellitem.DataContent]?.ToString());
                                            // writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent].ToString());
                                        }
                                        else
                                        {
                                            writeCell.SetCellValue(((JArray)bindsonObj)[datarowindex][cellitem.DataContent]?.ToString());
 
                                        }
 
                                    }
                                    else
                                    {
                                        writeCell.SetCellValue(bindsonObj[cellitem.DataContent]?.ToString());
                                    }
                                    //writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent].ToString());
                                }
                                else
                                {
                                    var bindsonObj = ((JObject)data)[cellitem.DataType];
                                    if (bindsonObj.Type == JTokenType.Array)
                                    {
                                        //获取当前行
                                        if (cellitem.SourceCount < datarowindex)
                                        {
                                            writeCell.SetCellValue(((JArray)bindsonObj)[0][cellitem.DataContent]?.ToString());
                                            // writeCell.SetCellValue(((JArray)data)[0][cellitem.DataContent].ToString());
                                        }
                                        else
                                        {
                                            writeCell.SetCellValue(((JArray)bindsonObj)[datarowindex][cellitem.DataContent]?.ToString());
 
                                        }
                                    }
                                    else
                                    {
                                        writeCell.SetCellValue(bindsonObj[cellitem.DataContent]?.ToString());
                                    }
                                }
                            }
                        }
                    }
 
                    if (datarowindex > 0)
                        addrowCount += 1;
                }
                //addrowCount -= 1;
 
            }
 
            using (FileStream file2007 = new FileStream("d:\\test20230518" + DateTime.Now.Ticks.ToString() + ".xlsx", FileMode.Create))
            {
                workbook.Write(file2007);
                file2007.Close();
                workbook.Close();
            }
 
            //MemoryStream memoryStream = new MemoryStream();
            //workbook.Write(memoryStream);
            //var buf = memoryStream.ToArray();
            ////memoryStream = (MemoryStream)null;
            ////返回待下载文件
            //Stream stream = new MemoryStream(buf);
            //stream.Flush();
            //stream.Position = 0L;
            //stream.Seek(0L, SeekOrigin.Begin);
            ////string str = ".xlsx";
            //return stream;
        }
 
        private bool setEmpateArrayObj(JToken data,
            string datapath,
            WriteExcelDataDefine cellitem)
        {
            if (data.Type == JTokenType.Array)
            {
                var allCount = data.Count();
 
                return setEmpateObj(data.ElementAt(0), datapath, cellitem, allCount);
            }
            return false;
        }
 
        private bool setEmpateObj(JToken data,
            string datapath,
            WriteExcelDataDefine cellitem,
            int allcount=1)
        {
            if (data.Type == JTokenType.Object
                && data[datapath] != null)
            {
                cellitem.WriteMode = (byte)(allcount > 1 ? 1 : 0);
                cellitem.SourceCount = allcount;
                cellitem.MaxWriteRowCount = allcount;//多行
                return true;
            }
            return false;
        }
 
        private void setbindPObjects(JToken data,
            Dictionary<string, int> mTableDefines,
            IOrderedEnumerable<WriteExcelDataDefine> orderbyCells)
        {
            var bindObjName = data.GetType().Name;
            foreach (var cellitem in orderbyCells)
            {
                if (cellitem.WriteType == 5) continue;//常量跳过
 
                if (cellitem.WriteType == 4
                    &&
                    (setEmpateObj(data, cellitem.DataContent, cellitem)
                        || setEmpateArrayObj(data, cellitem.DataContent, cellitem)))
                {
                    continue;
 
                }//绑定对象
 
                if (cellitem.WriteType == 3)
                {
                    if (!string.IsNullOrWhiteSpace(cellitem.DataType)
                    && !string.IsNullOrWhiteSpace(cellitem.DataContent))
                    {
                        JToken sondata = null;
                        if (data.Type == JTokenType.Array
                            && data.Count() > 0)
                        {
                            sondata = ((JArray)data)[0][cellitem.DataType];
                        }
                        else if (data.Type == JTokenType.Object)
                        {
                            sondata = ((JObject)data)[cellitem.DataType];
                        }
 
                        if (sondata != null
                             &&
                (setEmpateObj(sondata, cellitem.DataContent, cellitem)
                    || setEmpateArrayObj(sondata, cellitem.DataContent, cellitem)))
                        {
                            continue;
                        }
 
                    }
 
                    cellitem.DataType = "";
                    cellitem.DataContent = "";
                    cellitem.WriteType = 5;
                    cellitem.WriteMode = 0;
                    cellitem.SourceCount = 1;
                    cellitem.MaxWriteRowCount = 1;//多行
                }//子对象
 
            }
        }