批量插入SQL（适用于数据量十万级以上的快速大量插入）

 1 static public class LinqToDataTable
 2     {
 3         static public DataTable ToDataTable<T>(this IEnumerable<T> varlist, CreateRowDelegate<T> fn)
 4         {
 5             DataTable dtReturn = new DataTable();
 6             PropertyInfo[] oProps = null;
 7             foreach (T rec in varlist)
 8             {
 9                 // 使用反射获取属性名，创建表，只有第一次，其他的才会跟随
10                 if (oProps == null)
11                 {
12 
13                     oProps = ((Type)rec.GetType()).GetProperties();
14 
15                     foreach (PropertyInfo pi in oProps)
16                     {
17 
18                         Type colType = pi.PropertyType; if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof(Nullable<>)))
19                         {
20 
21                             colType = colType.GetGenericArguments()[0];
22 
23                         }
24 
25                         dtReturn.Columns.Add(new DataColumn(pi.Name, colType));
26 
27                     }
28 
29                 }
30 
31                 DataRow dr = dtReturn.NewRow(); foreach (PropertyInfo pi in oProps)
32                 {
33 
34                     dr[pi.Name] = pi.GetValue(rec, null) == null ? DBNull.Value : pi.GetValue(rec, null);
35 
36                 }
37 
38                 dtReturn.Rows.Add(dr);
39 
40             }
41 
42             return (dtReturn);
43 
44         }
45 
46         public delegate object[] CreateRowDelegate<T>(T t);
47     }

1         public static void bulkinsert<T>(string conn, string tbname, IEnumerable<T> query)
2         {
3             DateTime dtnow = DateTime.Now;
4             SQLHelper sqlhelper = new SQLHelper();
5             DataTable dt = query.ToDataTable<T>(rec => new object[] { query });
6 
7             sqlhelper.ExecuteSqlBulkCopy(conn, tbname, dt);
8             TraceLog.PrintLn("{1}正在结束插入数据耗时{0}ms,总共{2}条", (DateTime.Now - dtnow).TotalMilliseconds, tbname,dt.Rows.Count);
9         }

 1         /// <summary>
 2         /// 批量插入
 3         /// </summary>
 4         /// <param name="lstdata"></param>
 5         public void InsertMBT(List<inf_mobileDDVerificationALLDMBT> lstdata)
 6         {
 7             try
 8             {
 9                 SqlBulkCopyHelper.bulkinsert<inf_mobileDDVerificationALLDMBT>(Properties.Settings.Default.smsMarketdataConnectionString, "inf_mobileDDVerificationALLDMBT", lstdata);
10                 lstdata.Clear();
11             }
12             catch (Exception err)
13             {
14 
15             }
16             finally
17             {
18                 lstdata.Clear();
19             }
20         }

限定目的，能使人生变得简洁。