1 public static class ExcelUtil
2 {
3 // Methods
4 public static DataTable GetDataTable(Stream stream)
5 {
6 HSSFWorkbook workbook;
7 try
8 {
9 workbook = new HSSFWorkbook(stream);
10 }
11 catch (Exception exception)
12 {
13 throw exception;
14 }
15 ISheet sheetAt = workbook.GetSheetAt(0);
16 IEnumerator rowEnumerator = sheetAt.GetRowEnumerator();
17 DataTable table = new DataTable();
18 IRow row = sheetAt.GetRow(0);
19 if (row != null)
20 {
21 for (int j = 0; j < row.LastCellNum; j++)
22 {
23 ICell cell = row.GetCell(j);
24 if (cell == null)
25 {
26 table.Columns.Add("cell" + j.ToString());
27 }
28 else
29 {
30 table.Columns.Add(cell.ToString());
31 }
32 }
33 }
34 int count = table.Columns.Count;
35 for (int i = 0; rowEnumerator.MoveNext(); i++)
36 {
37 if (i > 0)
38 {
39 IRow current = (HSSFRow) rowEnumerator.Current;
40 DataRow row3 = table.NewRow();
41 for (int k = 0; k < count; k++)
42 {
43 ICell cell2 = current.GetCell(k);
44 if (cell2 == null)
45 {
46 row3[k] = null;
47 }
48 else
49 {
50 row3[k] = cell2.ToString();
51 }
52 }
53 table.Rows.Add(row3);
54 }
55 }
56 return table;
57 }
58
59 public static DataTable GetDataTable(string filePath)
60 {
61 HSSFWorkbook workbook;
62 try
63 {
64 using (FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
65 {
66 workbook = new HSSFWorkbook(stream);
67 }
68 }
69 catch (Exception exception)
70 {
71 throw exception;
72 }
73 ISheet sheetAt = workbook.GetSheetAt(0);
74 IEnumerator rowEnumerator = sheetAt.GetRowEnumerator();
75 DataTable table = new DataTable();
76 IRow row = sheetAt.GetRow(0);
77 if (row != null)
78 {
79 for (int j = 0; j < row.LastCellNum; j++)
80 {
81 ICell cell = row.GetCell(j);
82 if (cell == null)
83 {
84 table.Columns.Add("cell" + j.ToString());
85 }
86 else
87 {
88 table.Columns.Add(cell.ToString());
89 }
90 }
91 }
92 int count = table.Columns.Count;
93 for (int i = 0; rowEnumerator.MoveNext(); i++)
94 {
95 if (i > 0)
96 {
97 IRow current = (HSSFRow) rowEnumerator.Current;
98 DataRow row3 = table.NewRow();
99 for (int k = 0; k < count; k++)
100 {
101 ICell cell2 = current.GetCell(k);
102 if (cell2 == null)
103 {
104 row3[k] = null;
105 }
106 else
107 {
108 row3[k] = cell2.ToString();
109 }
110 }
111 table.Rows.Add(row3);
112 }
113 }
114 return table;
115 }
116
117 /// <summary>
118 /// 导入数据到excel文件
119 /// </summary>
120 /// <param name="data">待导入的数据</param>
121 /// <param name="fileName">文件路径</param>
122 /// <param name="sheetName">excel表名</param>
123 /// <param name="hiddenColmnIndexs">隐藏列索引</param>
124 /// <param name="header">列头字典；原始列头=>重命名列名</param>
125 /// <param name="redHeaderClomnIndexs">标记红色加粗的列索引</param>
126 /// <param name="comments">列头批注字典；列名=>批注内容</param>
127 /// <returns></returns>
128 public static string SetDataTableToExcel(DataTable data,string fileName, string sheetName, int[] hiddenColmnIndexs = null, Dictionary<string, string> header = null,int[] redHeaderClomnIndexs = null,Dictionary<string,string> comments= null)
129 {
130 int num4 = 0;
131 int num = 0;
132 int column = 0;
133 int rownum = 0;
134 ISheet sheet = null;
135 IWorkbook workbook = new HSSFWorkbook();
136 //todo:tans
137 var stream = new FileStream(fileName ,FileMode.OpenOrCreate,FileAccess.ReadWrite);
138
139 try
140 {
141 sheet = workbook.CreateSheet(sheetName);
142
143
144 IRow row = sheet.CreateRow(0);
145 column = 0;
146 int maxCount = Math.Max(header!=null ? header.Count : 0 , data.Columns.Count);
147
148 IDrawing patr1 = sheet.CreateDrawingPatriarch();// as HSSFPatriarch;
149 //创建列头
150 while (column < data.Columns.Count)
151 {
152 var col = data.Columns[column];
153 var colName = col.ColumnName;
154 ICell cell = row.GetCell(column);
155 if (header!=null && header.ContainsKey(colName))
156 {
157 string temp = header[colName];//列重命名
158 header.Remove(colName);
159 cell = row.CreateCell(column);
160 cell.SetCellValue(temp);
161 }
162 //创建批注
163 colName = cell.StringCellValue;
164 if (comments!=null && comments.ContainsKey(colName))
165 {
166 var commentStr = comments[colName];
167 IComment comment1 = patr1.CreateCellComment(new HSSFClientAnchor(0, 0, 0, 0, 1, 3, 3, 7));// as HSSFComment;
168 comment1.String = new HSSFRichTextString(commentStr);
169 cell.CellComment = comment1;
170 }
171 column++;
172 }
173 //附加列头
174 int colCount = data.Columns.Count;
175 foreach (var colName in header.Keys)
176 {
177 row.CreateCell(colCount).SetCellValue(header[colName]);
178 colCount++;
179 }
180 //设置列头样式
181 redHeaderClomnIndexs = redHeaderClomnIndexs ?? new int[]{};
182 for (int i = 0, l=0, rl= redHeaderClomnIndexs.Length; i < row.Cells.Count; i++,l++)
183 {
184 var cell = row.GetCell(i);
185 if (cell==null)
186 {
187 continue;
188 }
189 //设置字体
190 IFont font = workbook.CreateFont();
191 font.Boldweight = (short)FontBoldWeight.BOLD;
192 if (l < rl)
193 {
194 int index = redHeaderClomnIndexs[l];
195 cell = row.GetCell(index);
196 font.Color = (short)FontColor.RED;
197 }
198 //设置样式
199 ICellStyle style = workbook.CreateCellStyle();
200 style.Alignment = HorizontalAlignment.CENTER;
201 style.SetFont(font);
202
203 cell.CellStyle = style;
204 }
205 //创建数据列，并填充数据
206 rownum = 1;
207 for (num = 0; num < data.Rows.Count; num++)
208 {
209 IRow row2 = sheet.CreateRow(rownum);
210 for (column = 0; column < data.Columns.Count; column++)
211 {
212 row2.CreateCell(column).SetCellValue(data.Rows[num][column].ToString());
213 }
214 rownum++;
215 }
216 //设置隐藏列
217 if (hiddenColmnIndexs != null && hiddenColmnIndexs.Length <= column)
218 {
219 for (int i = 0, l = hiddenColmnIndexs.Length; i < l; i++)
220 {
221 sheet.SetColumnHidden(hiddenColmnIndexs[i], true);
222 }
223 }
224 //当创建完毕所有cell，设置居中才有效
225 for (int i = 0; i < row.Cells.Count; i++)
226 {
227 sheet.AutoSizeColumn(i);
228 }
229 workbook.Write(stream);
230 }
231 catch (Exception ex)
232 {
233 return null;
234 }
235 finally
236 {
237 stream.Close();
238 }
239 return fileName;
240 }
241 }
242
243
时间： 2024-10-20 14:07:28