C# List 转Datatable

 1 #region 导出Excel
 2 /// <summary>
 3 /// list 转换Datatable
 4 /// </summary>
 5 /// <param name="ResList"></param>
 6 /// <returns></returns>
 7 public DataTable DataOut(List<Excel> ResList)
 8 {
 9 
10 DataTable TempDT = new DataTable();
11 System.Reflection.PropertyInfo[] p = ResList[0].GetType().GetProperties();
12 foreach (System.Reflection.PropertyInfo pi in p)
13 {
14 TempDT.Columns.Add(pi.Name);
15 }
16 for (int i = 0; i < ResList.Count; i++)
17 {
18 ArrayList TempList = new ArrayList();
19 //将IList中的一条记录写入ArrayList
20 foreach (System.Reflection.PropertyInfo pi in p)
21 {
22 object oo = pi.GetValue(ResList[i], null);
23 TempList.Add(oo);
24 }
25 
26 object[] itm = new object[p.Length];
27 //遍历ArrayList向object[]里放数据
28 for (int j = 0; j < TempList.Count; j++)
29 {
30 itm.SetValue(TempList[j], j);
31 }
32 //将object[]的内容放入DataTable
33 TempDT.LoadDataRow(itm, true);
34 }
35 //返回DataTable
36 return TempDT;
37 }