SqlBulkCopy批量插入大数据

 1         /// <summary>
 2         /// 按照SqlBulkCopy写入数据库
 3         /// </summary>
 4         /// <param name="dt">数据表</param>
 5         /// <param name="tableName">数据库表名</param>
 6         public static void WriteDataBySqlBulkCopy(DataTable dt, string tableName, string connStr = null)
 7         {
 8             //判空
 9             if (dt == null || dt.Rows.Count == 0 || string.IsNullOrEmpty(tableName))
10             {
11                 return;
12             }
13             SqlConnection con = new SqlConnection(connStr);
14             if (con.State != ConnectionState.Open)
15             {
16                 con.Open();
17             }
18             //此部分是重要的东西
19             using (System.Data.SqlClient.SqlBulkCopy sbc = new System.Data.SqlClient.SqlBulkCopy(con))
20             {
21 
22                 try
23                 {
24                     for (int i = 0; i < dt.Columns.Count; i++)
25                     {
26 
27                         sbc.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName); //设置目标表和源数据的列映射
28                     }
29                     sbc.DestinationTableName = tableName;  //取得目标表名
30                     sbc.WriteToServer(dt);
31 
32                 }
33                 catch (Exception ex)
34                 {
35                     Console.WriteLine(ex.Message);
36                 }
37                 finally
38                 {
39                     if (con.State == ConnectionState.Open)
40                     {
41                         con.Close();
42                     }
43                 }
44             }
45         }