1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using NPOI.SS.UserModel;
6 using NPOI.XSSF.UserModel;
7 using NPOI.HSSF.UserModel;
8 using System.IO;
9 using System.Data;
10 using NPOI.SS.Util;
11
12 namespace Common
13 {
14 public class ExcelHelper : IDisposable
15 {
16 private string fileName = null; //文件名
17 private IWorkbook workbook = null;
18 private FileStream fs = null;
19 private bool disposed;
20
21 public ExcelHelper(string fileName)
22 {
23 this.fileName = fileName;
24 disposed = false;
25 }
26 /// <summary>
27 /// 生成Sheet对象
28 /// </summary>
29 /// <param name="fileName">导出Excel文件完整文件名</param>
30 /// <param name="sheetName">要导入的excel的sheet的名称</param>
31 /// <returns></returns>
32 public ISheet GenerateSheet(string sheetName)
33 {
34 ISheet sheet = null;
35
36 fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
37 if (fileName.IndexOf(".xlsx") > 0) // 2007版本
38 workbook = new XSSFWorkbook();
39 else if (fileName.IndexOf(".xls") > 0) // 2003版本
40 workbook = new HSSFWorkbook();
41 if (workbook != null)
42 {
43 sheet = workbook.CreateSheet(sheetName);
44 }
45 return sheet;
46 }
47 /// <summary>
48 /// 将DataTable数据导入到excel中
49 /// </summary>
50 /// <param name="sheet">所要操作Excel的Sheet对象</param>
51 /// <param name="data">要导入的数据</param>
52 /// <param name="dataRowStart">数据起始行索引</param>
53 /// <returns>导入数据行数(包含列名那一行)</returns>
54 public int DataTableToExcel(ISheet sheet, DataTable data, int dataRowStart)
55 {
56 int i = 0;
57 int j = 0;
58 try
59 {
60 if (sheet != null)
61 {
62 for (i = 0; i < data.Rows.Count; ++i)
63 {
64 IRow row = sheet.CreateRow(dataRowStart);
65 for (j = 0; j < data.Columns.Count; ++j)
66 {
67 row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
68 }
69 ++dataRowStart;
70 }
71 workbook.Write(fs); //写入到excel
72 }
73 return dataRowStart;
74 }
75 catch (Exception ex)
76 {
77 Console.WriteLine("Exception: " + ex.Message);
78 return -1;
79 }
80 }
81
82 /// <summary>
83 /// 将excel中的数据导入到DataTable中
84 /// </summary>
85 /// <param name="sheetName">excel工作薄sheet的名称</param>
86 /// <param name="dataRowStart">数据起始行索引</param>
87 /// <returns>返回的DataTable</returns>
88 public DataTable ExcelToDataTable(DataTable tableModel, string sheetName, int dataRowStart)
89 {
90 ISheet sheet = null;
91 DataTable data = tableModel.Clone();
92 try
93 {
94 fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
95 if (fileName.IndexOf(".xlsx") > 0) // 2007版本
96 workbook = new XSSFWorkbook(fs);
97 else if (fileName.IndexOf(".xls") > 0) // 2003版本
98 workbook = new HSSFWorkbook(fs);
99
100 if (sheetName != null)
101 {
102 sheet = workbook.GetSheet(sheetName);
103 if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
104 {
105 sheet = workbook.GetSheetAt(0);
106 }
107 }
108 else
109 {
110 sheet = workbook.GetSheetAt(0);
111 }
112 if (sheet != null)
113 {
114 IRow firstRow = sheet.GetRow(dataRowStart);
115 int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
116 //最后一列的标号
117 int rowCount = sheet.LastRowNum;
118 for (int i = dataRowStart; i <= rowCount; ++i)
119 {
120 IRow row = sheet.GetRow(i);
121 if (row == null) continue; //没有数据的行默认是null
122
123 DataRow dataRow = data.NewRow();
124 for (int j = row.FirstCellNum; j < cellCount; ++j)
125 {
126 if (row.GetCell(j) != null) //同理，没有数据的单元格都默认是null
127 dataRow[j] = row.GetCell(j).ToString();
128 }
129 data.Rows.Add(dataRow);
130 }
131 }
132
133 return data;
134 }
135 catch (Exception ex)
136 {
137 Console.WriteLine("Exception: " + ex.Message);
138 return null;
139 }
140 }
141 /// <summary>
142 /// 设置表头（支持单元格合并）
143 /// </summary>
144 /// <param name="sheet">要合并单元格所在的sheet</param>
145 /// <param name="mergeArrayList">需要进行单元格合并的单元格索引数组，数组长度为4，第一个为行起始位置，第二个为行结束为止，第三个为列起始位置，第四个为列结束为止</param>
146 /// <param name="valueList">单元格合并后值的集合，与合并单元格索引数组集合一一对应</param>
147 //public void SetCellRangeAddress(ISheet sheet, int rowstart, int rowend, int colstart, int colend, string value)
148 public void SetExcelHeader(ISheet sheet, IList<int[]> mergeArrayList, IList<string> valueList)
149 {
150 for (int m = 0; m < mergeArrayList.Count; m++)
151 {
152 if (mergeArrayList[m].Length > 4)
153 {
154 return;
155 }
156 int rowstart = mergeArrayList[m][0];
157 int rowend = mergeArrayList[m][1];
158 int colstart = mergeArrayList[m][2];
159 int colend = mergeArrayList[m][3];
160 string value = "";
161 if (m < valueList.Count)
162 {
163 value = valueList[m];
164 }
165 ICellStyle style = workbook.CreateCellStyle();
166 style.Alignment = HorizontalAlignment.Center;
167 IFont font = workbook.CreateFont();
168 font.Boldweight = 700;
169 font.FontHeight = 20 * 20;
170 style.SetFont(font);
171 for (int i = rowstart; i < rowend + 1; i++)
172 {
173 IRow row = sheet.GetRow(i);
174 if (row==null)
175 {
176 row = sheet.CreateRow(i);
177 }
178 for (int j = colstart; j < colend + 1; j++)
179 {
180 ICell cell = row.CreateCell(j);
181 cell.SetCellValue(value);
182 cell.CellStyle = style;
183 }
184 }
185 if (rowend - rowstart > 0 || colend - colstart > 0)
186 {
187 CellRangeAddress cellRangeAddress = new CellRangeAddress(rowstart, rowend, colstart, colend);
188 sheet.AddMergedRegion(cellRangeAddress);
189 }
190 }
191 //workbook.Write(fs);
192 }
193
194 public void Dispose()
195 {
196 Dispose(true);
197 GC.SuppressFinalize(this);
198 }
199
200 protected virtual void Dispose(bool disposing)
201 {
202 if (!this.disposed)
203 {
204 if (disposing)
205 {
206 if (fs != null)
207 fs.Close();
208 }
209
210 fs = null;
211 disposed = true;
212 }
213 }
214 }
215 }
CommenClass
时间： 2024-10-09 14:37:40