EPPlus下载地址：http://www.codeplex.com/EPPlus
引用命名空间：
using OfficeOpenXml;
using OfficeOpenXml.Table;
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.IO;
6 using System.Data;
7 using System.Reflection;
8 using System.Web;
9
10 public static class ExcelUtil
11 {
12 private static void dataTableToCsv(DataTable table, string file)
13 {
14 string title = "";
15 FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
16 StreamWriter sw = new StreamWriter(new BufferedStream(fs), System.Text.Encoding.Default);
17
18 for (int i = 0; i < table.Columns.Count; i++)
19 {
20 title += table.Columns[i].ColumnName + "\t"; //栏位：自动跳到下一单元格
21 }
22
23 title = title.Substring(0, title.Length - 1) + "\n";
24 sw.Write(title);
25
26 foreach (DataRow row in table.Rows)
27 {
28 string line = "";
29
30 for (int i = 0; i < table.Columns.Count; i++)
31 {
32 line += row[i].ToString().Trim() + "\t"; //内容：自动跳到下一单元格
33 }
34 line = line.Substring(0, line.Length - 1) + "\n";
35 sw.Write(line);
36 }
37 sw.Close();
38 fs.Close();
39 }
40
41 /// <summary>
42 /// 将一组对象导出成EXCEL
43 /// </summary>
44 /// <typeparam name="T">要导出对象的类型</typeparam>
45 /// <param name="objList">一组对象</param>
46 /// <param name="FileName">导出后的文件名</param>
47 /// <param name="columnInfo">列名信息</param>
48 public static void ExExcel<T>(List<T> objList, string FileName, Dictionary<string, string> columnInfo)
49 {
50 ExExcel(objList, FileName, columnInfo, null);
51 }
52
53 /// <summary>
54 /// 将一组对象导出成EXCEL
55 /// </summary>
56 /// <typeparam name="T">要导出对象的类型</typeparam>
57 /// <param name="objList">一组对象</param>
58 /// <param name="FileName">导出后的文件名</param>
59 /// <param name="columnInfo">列名信息</param>
60 /// <param name="other">追加其他内容</param>
61 public static void ExExcel<T>(List<T> objList, string FileName, Dictionary<string, string> columnInfo, string other)
62 {
63 if (columnInfo.Count == 0) { return; }
64 if (objList.Count == 0) { return; }
65 //生成EXCEL的HTML
66 string excelStr = "";
67
68 Type myType = objList[0].GetType();
69 //根据反射从传递进来的属性名信息得到要显示的属性
70 List<PropertyInfo> myPro = new List<PropertyInfo>();
71 foreach (string cName in columnInfo.Keys)
72 {
73 PropertyInfo p = myType.GetProperty(cName);
74 if (p != null)
75 {
76 myPro.Add(p);
77 excelStr += columnInfo[cName] + "\t";
78 }
79 }
80 //如果没有找到可用的属性则结束
81 if (myPro.Count == 0) { return; }
82 excelStr += "\n";
83
84 foreach (T obj in objList)
85 {
86 foreach (PropertyInfo p in myPro)
87 {
88 excelStr += p.GetValue(obj, null) + "\t";
89 }
90 excelStr += "\n";
91 }
92 if (!string.IsNullOrEmpty(other))
93 {
94 excelStr += other;
95 }
96 //输出EXCEL
97 HttpResponse rs = System.Web.HttpContext.Current.Response;
98 rs.Clear();
99 rs.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
100 rs.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(FileName, Encoding.UTF8));
101 rs.ContentType = "application/ms-excel";
102 rs.Write(excelStr);
103 rs.End();
104 }
105
106 #region 保存数据列表到Excel（泛型）+void SaveToExcel<T>(IEnumerable<T> data, string FileName, string OpenPassword = "")
107 /// <summary>
108 /// 保存数据列表到Excel（泛型）
109 /// </summary>
110 /// <typeparam name="T">集合数据类型</typeparam>
111 /// <param name="data">数据列表</param>
112 /// <param name="FileName">Excel文件</param>
113 /// <param name="OpenPassword">Excel打开密码</param>
114 public static void SaveToExcel<T>(IEnumerable<T> data, string FileName, string OpenPassword = "")
115 {
116 FileInfo file = new FileInfo(FileName);
117 try
118 {
119 using (ExcelPackage ep = new ExcelPackage(file, OpenPassword))
120 {
121 ExcelWorksheet ws = ep.Workbook.Worksheets.Add(typeof(T).Name);
122 ws.Cells["A1"].LoadFromCollection(data, true, TableStyles.Medium10);
123
124 ep.Save(OpenPassword);
125 }
126 }
127 catch (InvalidOperationException ex)
128 {
129 //Console.WriteLine(ex.Message);
130 throw ex;
131 }
132 }
133 #endregion
134
135 #region 从Excel中加载数据（泛型）+IEnumerable<T> LoadFromExcel<T>(string FileName) where T : new()
136 /// <summary>
137 /// 从Excel中加载数据（泛型）
138 /// </summary>
139 /// <typeparam name="T">每行数据的类型</typeparam>
140 /// <param name="FileName">Excel文件名</param>
141 /// <returns>泛型列表</returns>
142 private static IEnumerable<T> LoadFromExcel<T>(string FileName) where T : new()
143 {
144 FileInfo existingFile = new FileInfo(FileName);
145 List<T> resultList = new List<T>();
146 Dictionary<string, int> dictHeader = new Dictionary<string, int>();
147
148 using (ExcelPackage package = new ExcelPackage(existingFile))
149 {
150 ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
151
152 int colStart = worksheet.Dimension.Start.Column; //工作区开始列
153 int colEnd = worksheet.Dimension.End.Column; //工作区结束列
154 int rowStart = worksheet.Dimension.Start.Row; //工作区开始行号
155 int rowEnd = worksheet.Dimension.End.Row; //工作区结束行号
156
157 //将每列标题添加到字典中
158 for (int i = colStart; i <= colEnd; i++)
159 {
160 dictHeader[worksheet.Cells[rowStart, i].Value.ToString()] = i;
161 }
162
163 List<PropertyInfo> propertyInfoList = new List<PropertyInfo>(typeof(T).GetProperties());
164
165 for (int row = rowStart + 1; row < rowEnd; row++)
166 {
167 T result = new T();
168
169 //为对象T的各属性赋值
170 foreach (PropertyInfo p in propertyInfoList)
171 {
172 try
173 {
174 ExcelRange cell = worksheet.Cells[row, dictHeader[p.Name]]; //与属性名对应的单元格
175
176 if (cell.Value == null)
177 continue;
178 switch (p.PropertyType.Name.ToLower())
179 {
180 case "string":
181 p.SetValue(result, cell.GetValue<String>(), null);
182 break;
183 case "int16":
184 p.SetValue(result, cell.GetValue<Int16>(), null);
185 break;
186 case "int32":
187 p.SetValue(result, cell.GetValue<Int32>(), null);
188 break;
189 case "int64":
190 p.SetValue(result, cell.GetValue<Int64>(), null);
191 break;
192 case "decimal":
193 p.SetValue(result, cell.GetValue<Decimal>(), null);
194 break;
195 case "double":
196 p.SetValue(result, cell.GetValue<Double>(), null);
197 break;
198 case "datetime":
199 p.SetValue(result, cell.GetValue<DateTime>(), null);
200 break;
201 case "boolean":
202 p.SetValue(result, cell.GetValue<Boolean>(), null);
203 break;
204 case "byte":
205 p.SetValue(result, cell.GetValue<Byte>(), null);
206 break;
207 case "char":
208 p.SetValue(result, cell.GetValue<Char>(), null);
209 break;
210 case "single":
211 p.SetValue(result, cell.GetValue<Single>(), null);
212 break;
213 default:
214 break;
215 }
216 }
217 catch (KeyNotFoundException ex)
218 {
219 throw ex;
220 }
221 }
222 resultList.Add(result);
223 }
224 }
225 return resultList;
226 }
227 #endregion
228
229 /// <summary>
230 /// 创造参数对
231 /// </summary>
232 /// <typeparam name="T"></typeparam>
233 /// <param name="comnName"></param>
234 /// <param name="func"></param>
235 /// <returns></returns>
236 public static KeyValuePair<string, Func<T, string>> CreateKVP<T>(string comnName, Func<T, string> func)
237 {
238 return new KeyValuePair<string, Func<T, string>>(comnName, func);
239 }
240
241 /// <summary>
242 /// 向表中添加列
243 /// </summary>
244 /// <param name="sheet"></param>
245 /// <param name="columnName"></param>
246 public static void AddSheetHeadRange(this ExcelWorksheet sheet, params string[] columnNames)
247 {
248 for (int i = 0; i < columnNames.Length; i++)
249 sheet.Cells[1, i + 1].Value = columnNames[i];
250 }
251
252 /// <summary>
253 /// 向表中添加行数据
254 /// </summary>
255 /// <typeparam name="T"></typeparam>
256 /// <param name="sheet"></param>
257 /// <param name="listSources"></param>
258 /// <param name="values"></param>
259 public static void AddSheetRow<T>(this ExcelWorksheet sheet, IList<T> listSources, params KeyValuePair<string, Func<T, string>>[] values)
260 {
261 if (values != null && values.Length > 0)
262 {
263 sheet.AddSheetHeadRange(values.Select(item => item.Key).ToArray());
264 if (listSources != null && listSources.Count > 0)
265 {
266 IList<Func<T, string>> listVs = values.Select(item => item.Value).ToList();
267 for (int i = 0; i < listSources.Count; i++)
268 {
269 for (int j = 0; j < listVs.Count; j++)
270 {
271 sheet.Cells[(i + 2), (j + 1)].Value = listVs[j](listSources[i]);
272 }
273 }
274 }
275 }
276 }
277 }
ExcelUtil
使用如下：
System.IO.MemoryStream output = new System.IO.MemoryStream();
using (ExcelPackage package = new ExcelPackage(output))
{
ExcelWorksheet sheet = package.Workbook.Worksheets.Add("Demo");
sheet.AddSheetRow<TEntity>(new List<TEntity>(),
ExcelUtil.CreateKVP<TEntity>("col1", item => item.P1),
ExcelUtil.CreateKVP<TEntity>("col2", item => item.P2)
);
sheet.Cells.AutoFitColumns(0);
string filename =string.Format("/uploads/{0}.xls", DateTime.Now.ToString("yyyyMMdd"));
package.SaveAs(new System.IO.FileInfo(Server.MapPath(filename)));
output.Position = 0;
}
时间： 2024-10-25 21:20:26