MVC导出数据到Excel详解
今天为大家分享一个利用NPIO导出数据到Excel 客户端的例子！（刚毕业的小白，第一次写博，如有错误 还望各位大咖指正）
1、NPOI官方网站；（http://npoi.codeplex.com/） 需要引用的dll文件如下：
2、用到的ExcelHelper类:
1 using Common.Logging;
2 using NPOI.HPSF;
3 using NPOI.HSSF.UserModel;
4 using NPOI.HSSF.Util;
5 using NPOI.SS.UserModel;
6 using NPOI.SS.Util;
7 using NPOI.XSSF.UserModel;
8 using System;
9 using System.Collections.Generic;
10 using System.Data;
11 using System.IO;
12 using System.Linq;
13 using System.Text;
14 using System.Text.RegularExpressions;
15 using System.Web;
16
17 namespace HHM.Web
18 {
19
20 /// <summary>
21 /// 导出数据到excel
22 /// </summary>
23 public class ExcelHelper
24 {
25
26 /// <summary>
27 /// 将json转换为DataTable
28 /// </summary>
29 /// <param name="strJson">得到的json</param>
30 /// <returns></returns>
31 public static DataTable JsonToDataTable(string strJson)
32 {
33 //转换json格式
34 strJson = strJson.Replace(",\"", "*\"").Replace("\":", "\"#").ToString();
35 //取出表名
36 var rg = new Regex(@"(?<={)[^:]+(?=:\[)", RegexOptions.IgnoreCase);
37 string strName = rg.Match(strJson).Value;
38 DataTable tb = null;
39 //去除表名
40 strJson = strJson.Substring(strJson.IndexOf("[") + 1);
41 strJson = strJson.Substring(0, strJson.IndexOf("]"));
42
43 //获取数据
44 rg = new Regex(@"(?<={)[^}]+(?=})");
45 MatchCollection mc = rg.Matches(strJson);
46 for (int i = 0; i < mc.Count; i++)
47 {
48 string strRow = mc[i].Value;
49 string[] strRows = strRow.Split(‘*‘);
50
51 //创建表
52 if (tb == null)
53 {
54 tb = new DataTable();
55 tb.TableName = strName;
56 foreach (string str in strRows)
57 {
58 var dc = new DataColumn();
59 string[] strCell = str.Split(‘#‘);
60
61 if (strCell[0].Substring(0, 1) == "\"")
62 {
63 int a = strCell[0].Length;
64 dc.ColumnName = strCell[0].Substring(1, a - 2);
65 }
66 else
67 {
68 dc.ColumnName = strCell[0];
69 }
70 tb.Columns.Add(dc);
71 }
72 tb.AcceptChanges();
73 }
74
75 //增加内容
76 DataRow dr = tb.NewRow();
77 for (int r = 0; r < strRows.Length; r++)
78 {
79 try
80 {
81 string a = strRows[r].Split(‘#‘)[1].Trim();
82 if (a.Equals("null"))
83 {
84 dr[r] = "";
85 }
86 else
87 {
88 dr[r] = strRows[r].Split(‘#‘)[1].Trim().Replace("，", ",").Replace("：", ":").Replace("\"", "");
89 }
90 }
91 catch (Exception e)
92 {
93
94 throw e;
95 }
96 }
97 tb.Rows.Add(dr);
98 tb.AcceptChanges();
99 }
100
101 try
102 {
103 if (tb != null)
104 {
105 return tb;
106 }
107 else
108 {
109 throw new Exception("解析错误");
110 }
111 }
112 catch (Exception e)
113 {
114
115 throw e;
116 }
117 }
118
119
120 /// <summary>
121 /// DataTable导出到Excel文件
122 /// </summary>
123 /// <param name="dtSource">源DataTable</param>
124 /// <param name="strHeaderText">表头文本</param>
125 /// <param name="strFileName">保存位置</param>
126 /// <param name="sheetName">工作薄名称</param>
127 public static void Export(DataTable dtSource, string strHeaderText, string strFileName, string sheetName)
128 {
129 using (MemoryStream ms = Export(dtSource, strHeaderText, sheetName))
130 {
131 using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
132 {
133 byte[] data = ms.ToArray();
134 fs.Write(data, 0, data.Length);
135 fs.Flush();
136 }
137 }
138 }
139
140 /// <summary>
141 /// DataTable导出到Excel的MemoryStream
142 /// </summary>
143 /// <param name="dtSource">源DataTable</param>
144 /// <param name="strHeaderText">表头文本</param>
145 /// <param name="sheetName">工作薄名称</param>
146 public static MemoryStream Export(DataTable dtSource, string strHeaderText, string sheetName)
147 {
148 HSSFWorkbook workbook = new HSSFWorkbook();
149 ///设置工作薄名称
150 ISheet sheet = workbook.CreateSheet(sheetName);
151 sheet.TabColorIndex = HSSFColor.Red.Index;
152 #region 右击文件 属性信息
153 {
154 DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
155 dsi.Company = "XXXX有限公司";
156 dsi.Category = "业务导出";///类别
157 workbook.DocumentSummaryInformation = dsi;
158 SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
159 si.Author = "XXXX有限公司信息技术部"; //填加xls文件作者信息
160 si.ApplicationName = "代理商服务平台"; //填加xls文件创建程序信息
161 si.LastAuthor = "XXXX有限公司信息技术部"; //填加xls文件最后保存者信息
162 si.Comments = "如有疑问请询问在线客服"; //填加xls文件作者信息
163 si.Title = strHeaderText; //填加xls文件标题信息
164 si.Subject = "XXXX在线系统业务导出";//填加文件主题信息
165 si.CreateDateTime = DateTime.Now;
166 workbook.SummaryInformation = si;
167 }
168 #endregion
169 ///时间格式化格式
170 HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
171 HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
172 dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd HH:mm:ss");
173 //取得列宽
174 int[] arrColWidth = new int[dtSource.Columns.Count];
175 foreach (DataColumn item in dtSource.Columns)
176 {
177 arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
178 }
179 for (int i = 0; i < dtSource.Rows.Count; i++)
180 {
181 for (int j = 0; j < dtSource.Columns.Count; j++)
182 {
183 int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
184 if (intTemp > arrColWidth[j])
185 {
186 arrColWidth[j] = intTemp;
187 }
188 }
189 }
190 int rowIndex = 0;
191 foreach (DataRow row in dtSource.Rows)
192 {
193 #region 新建表，填充表头，填充列头，样式
194 if (rowIndex == 65535 || rowIndex == 0)
195 {
196 if (rowIndex != 0)
197 {
198 sheet = workbook.CreateSheet() as HSSFSheet;
199 }
200 #region 表头及样式
201 {
202
203 //HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
204 //headerRow.HeightInPoints = 25;
205 //headerRow.CreateCell(0).SetCellValue(strHeaderText);
206 //HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
207 //headStyle.Alignment = HorizontalAlignment.CENTER;
208 //HSSFFont font = workbook.CreateFont() as HSSFFont;
209 //font.FontHeightInPoints = 20;
210 //font.Boldweight = 200;
211 //headStyle.SetFont(font);
212 //headerRow.GetCell(0).CellStyle = headStyle;
213 //sheet.AddMergedRegion(new CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1));
214 }
215 #endregion
216
217 #region 列头及样式
218 {
219 HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
220 HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
221 headStyle.Alignment = HorizontalAlignment.Center;
222 HSSFFont font = workbook.CreateFont() as HSSFFont;
223 font.FontHeightInPoints = 10;
224 font.Boldweight = 700;
225 headStyle.IsLocked = true;
226 headStyle.SetFont(font);
227 //设置每列的文字修改
228 string[] header = strHeaderText.Split(‘,‘);
229 int i = 0;
230 foreach (DataColumn column in dtSource.Columns)
231 {
232 if (i < header.Length)
233 {
234 //headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
235 headerRow.CreateCell(column.Ordinal).SetCellValue(header[i]);
236 headerRow.GetCell(column.Ordinal).CellStyle = headStyle;
237 //设置列宽
238 sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
239 }
240 i++;
241 }
242 //让列头不动
243 //sheet.CreateFreezePane(0, 2, 0, dtSource.Columns.Count - 1);
244 sheet.CreateFreezePane(0, 1, 0, dtSource.Columns.Count - 1);
245 }
246 #endregion
247 //修改把内容提到第二行
248 // rowIndex = 2;
249 rowIndex = 1;
250 }
251 #endregion
252
253 #region 填充内容
254 HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
255 foreach (DataColumn column in dtSource.Columns)
256 {
257 HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
258 string drValue = row[column].ToString();
259 switch (column.DataType.ToString())
260 {
261 case "System.String"://字符串类型
262 newCell.SetCellValue(drValue);
263 break;
264 case "System.DateTime"://日期类型
265 DateTime dateV;
266 DateTime.TryParse(drValue, out dateV);
267 newCell.SetCellValue(dateV);
268
269 newCell.CellStyle = dateStyle;//格式化显示
270 break;
271 case "System.Boolean"://布尔型
272 bool boolV = false;
273 bool.TryParse(drValue, out boolV);
274 newCell.SetCellValue(boolV);
275 break;
276 case "System.Int16"://整型
277 case "System.Int32":
278 case "System.Int64":
279 case "System.Byte":
280 int intV = 0;
281 int.TryParse(drValue, out intV);
282 newCell.SetCellValue(intV);
283 break;
284 case "System.Decimal"://浮点型
285 case "System.Double":
286 double doubV = 0;
287 double.TryParse(drValue, out doubV);
288 newCell.SetCellValue(doubV);
289 break;
290 case "System.DBNull"://空值处理
291 newCell.SetCellValue("");
292 break;
293 default:
294 newCell.SetCellValue("");
295 break;
296 }
297 }
298 #endregion
299 rowIndex++;
300 }
301 using (MemoryStream ms = new MemoryStream())
302 {
303 workbook.Write(ms);
304 ms.Flush();
305 ms.Position = 0;
306 return ms;
307 }
308 }
309
310
311 /// <summary>
312 /// 用于Web导出
313 /// </summary>
314 /// <param name="dtSource">源DataTable</param>
315 /// <param name="strHeaderText">表头文本</param>
316 /// <param name="strFileName">文件名</param>
317 /// <param name="sheetName">工作薄名称</param>
318 public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName, string sheetName)
319 {
320 HttpContext curContext = HttpContext.Current;
321 // 设置编码和附件格式
322 curContext.Response.ContentType = "application/vnd.ms-excel";
323 curContext.Response.ContentEncoding = Encoding.UTF8;
324 curContext.Response.Charset = "";
325 curContext.Response.AppendHeader("Content-Disposition",
326 "attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8) + ".xls");
327 curContext.Response.BinaryWrite(Export(dtSource, strHeaderText, sheetName).GetBuffer());
328 //curContext.Response.End();
329 // 因为（由于代码已经过优化或本机框架位于调用堆栈之上,无法计算表达式的值）异常
330 HttpContext.Current.ApplicationInstance.CompleteRequest();
331 }
332
333
334 /// <summary>读取excel
335 /// 默认第一行为标头
336 /// </summary>
337 /// <param name="strFileName">excel文档路径</param>
338 /// <returns></returns>
339 public static DataTable Import(string strFileName)
340 {
341 DataTable dt = new DataTable();
342 HSSFWorkbook hssfworkbook;
343 using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
344 {
345 hssfworkbook = new HSSFWorkbook(file);
346 }
347 HSSFSheet sheet = hssfworkbook.GetSheetAt(0) as HSSFSheet;
348 System.Collections.IEnumerator rows = sheet.GetRowEnumerator();
349 HSSFRow headerRow = sheet.GetRow(0) as HSSFRow;
350 int cellCount = headerRow.LastCellNum;
351 for (int j = 0; j < cellCount; j++)
352 {
353 HSSFCell cell = headerRow.GetCell(j) as HSSFCell;
354 dt.Columns.Add(cell.ToString());
355 }
356 for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
357 {
358 HSSFRow row = sheet.GetRow(i) as HSSFRow;
359 DataRow dataRow = dt.NewRow();
360 for (int j = row.FirstCellNum; j < cellCount; j++)
361 {
362 if (row.GetCell(j) != null)
363 dataRow[j] = row.GetCell(j).ToString();
364 }
365 dt.Rows.Add(dataRow);
366 }
367 return dt;
368 }
369
370 /// <summary>
371 /// Excel表格转DataTable
372 /// </summary>
373 /// <param name="FilePath">Excel文件物理路径</param>
374 /// <returns>DataTable</returns>
375 public DataTable ExcelToDataTable(string FilePath)
376 {
377 DataTable dt = new DataTable("table1");
378 using (FileStream fs = new FileStream(FilePath, FileMode.Open, FileAccess.Read))
379 {
380 IWorkbook workbook = WorkbookFactory.Create(fs);//使用接口，自动识别excel2003/2007格式
381 ISheet sheet = workbook.GetSheetAt(0);//得到里面第一个sheet
382 //表头
383 IRow headerRow = sheet.GetRow(0);//获得第一行
384 int cellCount = headerRow.LastCellNum - 1;//获得最后一个单元格的列号
385 for (int i = 0; i <= cellCount; i++)
386 {
387 //DataColumn column = new DataColumn(headerRow.Cells[i].ToString());
388 DataColumn column;
389 if (headerRow.GetCell(i) == null)
390 {
391 column = new DataColumn("");
392 }
393 else
394 {
395 string ColumnName = headerRow.GetCell(i).StringCellValue.ToString().Trim();
396 //判断重名
397 if (dt.Columns.Contains(ColumnName))
398 {
399 int RepeatNum = 1;
400 //加重复数后缀，循环判断
401 while (dt.Columns.Contains(ColumnName + RepeatNum.ToString()))
402 {
403 RepeatNum++;
404 }
405 column = new DataColumn(ColumnName + RepeatNum.ToString());
406 }
407 else
408 {
409 column = new DataColumn(ColumnName);
410 }
411 }
412 dt.Columns.Add(column);
413 }
414 //内容
415 for (int i = 1; i <= sheet.LastRowNum; i++)
416 {
417 DataRow dr = dt.NewRow();
418 IRow Row = sheet.GetRow(i);
419 if (Row == null)
420 {
421 continue;
422 }
423 for (int j = 0; j <= cellCount; j++)
424 {
425 if (Row.GetCell(j) == null)
426 {
427 dr[j] = "";
428 }
429 else
430 {
431 dr[j] = Row.GetCell(j).ToString().Trim();
432 }
433 }
434 dt.Rows.Add(dr);
435 }
436 }
437 return dt;
438 }
439 }
440
441 }
ExcelHelper类
3、导出选中行的Js代码：
1 //EasyUI datagrid 动态导出Excel
2 function exportExcel() {
3 var rows = $("#grid").datagrid("getSelections");
4
5 var bodyData = JSON.stringify(rows); //转成json字符串
6
7 window.open(‘/SmsCount/ExportExcel?id=‘ + bodyData, ‘_black‘);
8 }
4、在控制器中调用ExcelHelper类方法：
1 /// <summary>
2 /// 导出Excel
3 /// </summary>
4 /// <returns></returns>
5 public ActionResult ExportExcel(string id)
6 {
7 try
8 {
9 DataTable dt = ExcelHelper.JsonToDataTable(id);
10 ExcelHelper.ExportByWeb(dt,"编号,日期,下行数量,上行数量","短信统计","sheet1");
11 return Content("<script >alert(‘导出成功！‘);</script >", "text/html");
12 }
13 catch (Exception ex)
14 {
15 HHM.Common.LogHelper.Error(ex);
16 return Content("<script >alert(‘导出失败！‘);</script >", "text/html");
17 }
18 }
5、导出效果：
原文：http://www.cnblogs.com/congcongliu/p/6806134.html
时间： 2024-11-10 03:13:49