.net批量插入SqlServer数据库的方法：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Diagnostics;
using System.Linq;
using System.Text;

namespace SqlServerBulkInsert
{
    class Program
    {
        public static void BulkToDB(DataTable dt)
        {
            SqlConnection sqlConn = new SqlConnection(
                ConfigurationManager.ConnectionStrings["connectionString"].ConnectionString);
            SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConn);
            bulkCopy.DestinationTableName = "BulkTestTable";
            bulkCopy.BatchSize = dt.Rows.Count;

            try
            {
                sqlConn.Open();
                if (dt != null && dt.Rows.Count != 0)
                    bulkCopy.WriteToServer(dt);
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                sqlConn.Close();
                if (bulkCopy != null)
                    bulkCopy.Close();
            }
        }
        public static DataTable GetTableSchema()
        {
            DataTable dt = new DataTable();
            dt.Columns.AddRange(new DataColumn[]{  
             new DataColumn("Id",typeof(int)),  
             new DataColumn("UserName",typeof(string)),  
             new DataColumn("Pwd",typeof(string))});

            return dt;
        }
        static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();
            for (int multiply = 0; multiply < 10; multiply++)
            {
                DataTable dt = GetTableSchema();
                for (int count = multiply * 100000; count < (multiply + 1) * 100000; count++)
                {
                    DataRow r = dt.NewRow();
                    r[0] = count;
                    r[1] = string.Format("User-{0}", count * multiply);
                    r[2] = string.Format("Pwd-{0}", count * multiply);
                    dt.Rows.Add(r);
                }
                sw.Start();
                BulkToDB(dt);
                sw.Stop();
                Console.WriteLine(string.Format("Elapsed Time is {0} Milliseconds", sw.ElapsedMilliseconds));
            }

            Console.ReadLine();
        }
    }
}

//------------------以下是测试数据库及表的建立sql语句————————————————————————————

USE [BulkTestDB]
GO

/****** Object:  Table [dbo].[BulkTestTable]    Script Date: 09/22/2016 09:38:04 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

SET ANSI_PADDING ON
GO

CREATE TABLE [dbo].[BulkTestTable](
    [Id] [int] NOT NULL,
    [UserName] [nvarchar](32) NULL,
    [Pwd] [varchar](16) NULL,
PRIMARY KEY CLUSTERED
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO