[转]C# 导入导出Excel通用类(SamWang)

http://www.cnblogs.com/wangshenhe/archive/2012/05/10/2493727.html
 1 /******************************************************************
  2  * 创 建 人：  SamWang
  3  * 创建时间：  2012-3-16 9:59
  4  * 描    述：
  5  *             导入导出Excel通用类
  6  * 版    本：  V1.0      
  7  * 环    境：  VS2005
  8 ******************************************************************/
  9 using System;
 10 using System.Collections.Generic;
 11 using System.Text;
 12 using System.Windows.Forms;
 13 using Excel = Microsoft.Office.Interop.Excel;
 14 using System.Data;
 15 using System.Drawing;
 16 using System.Collections;
 17 using System.Diagnostics;
 18 using System.Data.OleDb;
 19 
 20 namespace LingDang.CRM.UI.Client
 21 {
 22     public class ExcelIO:IDisposable
 23     {
 24         #region Constructors
 25         private ExcelIO()
 26         {
 27             status = IsExistExecl() ? 0 : -1;
 28         }
 29 
 30         public static ExcelIO GetInstance()
 31         {
 32             //if(instance == null)
 33             //{
 34             //    lock (syncRoot)
 35             //    {
 36             //         if(instance == null)
 37             //         {
 38             //            instance = new ExcelIO();
 39             //         }
 40             //    }
 41             //}
 42             //return instance;
 43             return new ExcelIO();
 44         }
 45         #endregion
 46 
 47         #region Fields
 48         private static ExcelIO instance;
 49         private static readonly object syncRoot = new object();
 50         private string returnMessage;
 51         private Excel.Application xlApp;
 52         private Excel.Workbooks workbooks = null;
 53         private Excel.Workbook workbook = null;
 54         private Excel.Worksheet worksheet = null;
 55         private Excel.Range range = null;
 56         private int status = -1;
 57         private bool disposed = false;//是否已经释放资源的标记
 58         #endregion            
 59     
 60         #region Properties
 61         /// <summary>
 62         /// 返回信息
 63         /// </summary>
 64         public string ReturnMessage
 65         {
 66             get { return returnMessage; }
 67         }
 68 
 69         /// <summary>
 70         /// 状态:0-正常，-1-失败 1-成功
 71         /// </summary>
 72         public int Status
 73         {
 74             get { return status;}
 75         }
 76         #endregion
 77 
 78         #region Methods
 79         /// <summary>
 80         /// 判断是否安装Excel
 81         /// </summary>
 82         /// <returns></returns>
 83         protected bool IsExistExecl()
 84         {
 85             try
 86             {
 87                 xlApp = new Excel.Application();
 88                 if (xlApp == null)
 89                 {
 90                     returnMessage = "无法创建Excel对象，可能您的计算机未安装Excel!";
 91                     return false;
 92                 }
 93             }
 94             catch (Exception ex)
 95             {
 96                 returnMessage = "请正确安装Excel！";
 97                 //throw ex;
 98                 return false;
 99             }
100             
101             return true;
102         }
103 
104         /// <summary>
105         /// 获得保存路径
106         /// </summary>
107         /// <returns></returns>
108         public static string SaveFileDialog()
109         {
110             SaveFileDialog sfd = new SaveFileDialog();
111             sfd.DefaultExt = "xls";
112             sfd.Filter = "Excel文件(*.xls)|*.xls";
113             if (sfd.ShowDialog() == DialogResult.OK)
114             {
115                 return sfd.FileName;
116             }
117             return string.Empty;
118         }
119 
120         /// <summary>
121         /// 获得打开文件的路径
122         /// </summary>
123         /// <returns></returns>
124         public static string OpenFileDialog()
125         {
126             OpenFileDialog ofd = new OpenFileDialog();
127             ofd.DefaultExt = "xls";
128             ofd.Filter = "Excel文件(*.xls)|*.xls";
129             if (ofd.ShowDialog() == DialogResult.OK)
130             {
131                 return ofd.FileName;
132             }
133             return string.Empty;
134         }
135 
136         /// <summary>
137         /// 设置单元格边框
138         /// </summary>
139         protected void SetCellsBorderAround()
140         {
141             range.BorderAround(Excel.XlLineStyle.xlContinuous, Excel.XlBorderWeight.xlThin, Excel.XlColorIndex.xlColorIndexAutomatic, null);
142             //if (dt.Rows.Count > 0)
143             //{
144             //    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
145             //    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Excel.XlLineStyle.xlContinuous;
146             //    range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight = Excel.XlBorderWeight.xlThin;
147             //}
148             //if (dt.Columns.Count > 1)
149             {
150                 range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
151                 range.Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;
152                 range.Borders[Excel.XlBordersIndex.xlInsideVertical].Weight = Excel.XlBorderWeight.xlThin;
153             }
154         }
155 
156         /// <summary>
157         /// 将DataTable导出Excel
158         /// </summary>
159         /// <param name="dt">数据集</param>
160         /// <param name="saveFilePath">保存路径</param>
161         /// <param name="reportName">报表名称</param>
162         /// <returns>是否成功</returns>
163         public bool DataTableToExecl(DataTable dt, string saveFileName, string reportName)
164         {
165             //判断是否安装Excel
166             bool fileSaved = false;
167             if(status == -1) return fileSaved;
168             //判断数据集是否为null
169             if (dt == null)
170             {
171                 returnMessage = "无引出数据！";
172                 return false;
173             }
174             //判断保存路径是否有效
175             if (!saveFileName.Contains(":"))
176             {
177                 returnMessage = "引出路径有误！请选择正确路径！";
178                 return false;
179             }
180 
181             //创建excel对象
182             workbooks = xlApp.Workbooks;
183             workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
184             worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
185             worksheet.Cells.Font.Size = 10;
186             worksheet.Cells.NumberFormat = "@";
187             long totalCount = dt.Rows.Count;
188             long rowRead = 0;
189             float percent = 0;
190             int rowIndex = 0;
191 
192             //第一行为报表名称，如果为null则不保存该行    
193             ++rowIndex;
194             worksheet.Cells[rowIndex, 1] = reportName;
195             range = (Excel.Range)worksheet.Cells[rowIndex, 1];
196             range.Font.Bold = true;
197 
198             //写入字段(标题)
199             ++rowIndex;
200             for (int i = 0; i < dt.Columns.Count; i++)
201             {
202                 worksheet.Cells[rowIndex,i+1] = dt.Columns[i].ColumnName;
203                 range = (Excel.Range)worksheet.Cells[rowIndex, i + 1];
204                
205                 range.Font.Color = ColorTranslator.ToOle(Color.Blue);
206                 range.Interior.Color = dt.Columns[i].Caption == "表体" ? ColorTranslator.ToOle(Color.SkyBlue) : ColorTranslator.ToOle(Color.Yellow);
207             }
208 
209             //写入数据
210             ++rowIndex;
211             for (int r = 0; r < dt.Rows.Count; r++)
212             {
213                 for (int i = 0; i < dt.Columns.Count; i++)
214                 {
215                     worksheet.Cells[r + rowIndex, i + 1] = dt.Rows[r][i].ToString();
216                 }
217                 rowRead++;
218                 percent = ((float)(100 * rowRead)) / totalCount;
219             }
220 
221             //画单元格边框
222             range = worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[dt.Rows.Count + 2, dt.Columns.Count]);
223             this.SetCellsBorderAround();
224 
225             //列宽自适应
226             range.EntireColumn.AutoFit();
227 
228             //保存文件
229             if (saveFileName != "")
230             {
231                 try
232                 {
233                     workbook.Saved = true;
234                     workbook.SaveCopyAs(saveFileName);
235                     fileSaved = true;
236                 }
237                 catch (Exception ex)
238                 {
239                     fileSaved = false;
240                     returnMessage = "导出文件时出错,文件可能正被打开！\n" + ex.Message;
241                 }
242             }
243             else
244             {
245                 fileSaved = false;
246             }
247 
248             //释放Excel对应的对象（除xlApp,因为创建xlApp很花时间，所以等析构时才删除)
249             //Dispose(false);
250             Dispose();
251             return fileSaved;
252         }
253 
254         /// <summary>
255         /// 导入EXCEL到DataSet
256         /// </summary>
257         /// <param name="fileName">Excel全路径文件名</param>
258         /// <returns>导入成功的DataSet</returns>
259         public DataSet ImportExcel(string fileName)
260         {
261             if (status == -1) return null;
262             //判断文件是否被其他进程使用            
263             try
264             {
265                 workbook = xlApp.Workbooks.Open(fileName, 0, false, 5, "", "", false, Excel.XlPlatform.xlWindows, "", true, false, 0, true, 1, 0);
266                 worksheet = (Excel.Worksheet)workbook.Worksheets[1];
267             }
268             catch
269             {
270                 returnMessage = "Excel文件处于打开状态，请保存关闭";
271                 return null;
272             }
273 
274             //获得所有Sheet名称
275             int n = workbook.Worksheets.Count;
276             string[] sheetSet = new string[n];
277             ArrayList al = new ArrayList();
278             for (int i = 0; i < n; i++)
279             {
280                 sheetSet[i] = ((Excel.Worksheet)workbook.Worksheets[i+1]).Name;
281             }
282 
283             //释放Excel相关对象
284             Dispose();
285 
286             //把EXCEL导入到DataSet
287             DataSet ds = null;
288             //string connStr = " Provider = Microsoft.ACE.OLEDB.12.0 ; Data Source = " + fileName + ";Extended Properties=\"Excel 12.0;HDR=No;IMEX=1;\""; 
289             List<string> connStrs = new List<string>();            
290             connStrs.Add("Provider = Microsoft.Jet.OLEDB.4.0; Data Source = " + fileName + ";Extended Properties=\"Excel 8.0;HDR=No;IMEX=1;\"");
291             connStrs.Add("Provider = Microsoft.ACE.OLEDB.12.0 ; Data Source = " + fileName + ";Extended Properties=\"Excel 12.0;HDR=No;IMEX=1;\"");
292             foreach (string connStr in connStrs)
293             {
294                 ds = GetDataSet(connStr, sheetSet);
295                 if (ds != null) break;
296             }                  
297             return ds;
298         }
299 
300         /// <summary>
301         /// 通过olddb获得dataset
302         /// </summary>
303         /// <param name="connectionstring"></param>
304         /// <returns></returns>
305         protected DataSet GetDataSet(string connStr, string[] sheetSet)
306         {
307             DataSet ds = null;
308             using (OleDbConnection conn = new OleDbConnection(connStr))
309             {
310                 try
311                 {
312                     conn.Open();
313                     OleDbDataAdapter da;
314                     ds = new DataSet();
315                     for (int i = 0; i < sheetSet.Length; i++)
316                     {
317                         string sql = "select * from [" + sheetSet[i] + "$] ";
318                         da = new OleDbDataAdapter(sql, conn);
319                         da.Fill(ds, sheetSet[i]);
320                         da.Dispose();
321                     }
322                     conn.Close();
323                     conn.Dispose();
324                 }
325                 catch (Exception ex)
326                 {
327                     return null;
328                 }                
329             }
330             return ds;
331         }
332 
333         /// <summary>
334         /// 释放Excel对应的对象资源
335         /// </summary>
336         /// <param name="isDisposeAll"></param>
337         protected virtual void Dispose(bool disposing)
338         {
339             try
340             {
341                 if (!disposed)
342                 {
343                     if (disposing)
344                     {
345                         if (range != null)
346                         {
347                             System.Runtime.InteropServices.Marshal.ReleaseComObject(range);
348                             range = null;
349                         }
350                         if (worksheet != null)
351                         {
352                             System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet);
353                             worksheet = null;
354                         }
355                         if (workbook != null)
356                         {
357                             System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
358                             workbook = null;
359                         }
360                         if (workbooks != null)
361                         {
362                             xlApp.Application.Workbooks.Close();
363                             System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks);
364                             workbooks = null;
365                         }
366                         if (xlApp != null)
367                         {
368                             xlApp.Quit();
369                             System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp);
370                         }
371                         int generation = GC.GetGeneration(xlApp);
372                         System.GC.Collect(generation);
373                     }
374 
375                     //非托管资源的释放
376                     //KillExcel();
377                 }
378                 disposed = true;
379             }
380             catch (Exception e)
381             {
382                 throw e;
383             }                
384         }
385 
386         /// <summary> 
387         /// 会自动释放非托管的该类实例的相关资源
388         /// </summary>
389         public void Dispose()
390         {
391             try
392             {
393                 Dispose(true);
394                 //告诉垃圾回收器,资源已经被回收
395                 GC.SuppressFinalize(this);
396             }
397             catch (Exception e)
398             {
399                 throw e;
400             }
401         }
402 
403         /// <summary>
404         /// 关闭
405         /// </summary>
406         public void Close()
407         {
408             try
409             {
410                 this.Dispose();
411             }
412             catch (Exception e)
413             {
414                 
415                 throw e;
416             }
417         }
418 
419         /// <summary>
420         /// 析构函数
421         /// </summary>
422         ~ExcelIO()
423         {
424             try
425             {
426                 Dispose(false);
427             }
428             catch (Exception e)
429             {
430                 throw e;
431             }
432         }
433 
434         /// <summary>
435         /// 关闭Execl进程(非托管资源使用)
436         /// </summary>
437         private void KillExcel()
438         {
439             try
440             {
441                 Process[] ps = Process.GetProcesses();
442                 foreach (Process p in ps)
443                 {
444                     if (p.ProcessName.ToLower().Equals("excel"))
445                     {
446                         //if (p.Id == ExcelID)
447                         {
448                             p.Kill();
449                         }
450                     }
451                 }
452             }
453             catch (Exception ex)
454             {
455                 //MessageBox.Show("ERROR " + ex.Message);
456             }
457         }
458 
459         #endregion
460 
461         #region Events
462 
463         #endregion    
464     
465     
466         #region IDisposable 成员
467         
468 
469         #endregion
470     }
471 }