批量插入100万条数据

创建数据库：

--Create DataBase
create database BulkTestDB;
go
use BulkTestDB;
go
--Create Table
Create table BulkTestTable(
Id int primary key,
UserName nvarchar(32),
Pwd varchar(16))
go
--Create Table Valued
CREATE TYPE BulkUdt AS TABLE
  (Id int,
   UserName nvarchar(32),
   Pwd varchar(16))

   

第一种，普通sql用insert插入:

            Stopwatch sw = new Stopwatch();

            SqlConnection sqlConn = new SqlConnection(
                ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString);//连接数据库

            SqlCommand sqlComm = new SqlCommand();
            sqlComm.CommandText = string.Format("insert into BulkTestTable(Id,UserName,Pwd)values(@p0,@p1,@p2)");//参数化SQL
            sqlComm.Parameters.Add("@p0", SqlDbType.Int);
            sqlComm.Parameters.Add("@p1", SqlDbType.NVarChar);
            sqlComm.Parameters.Add("@p2", SqlDbType.VarChar);
            sqlComm.CommandType = CommandType.Text;
            sqlComm.Connection = sqlConn;
            sqlConn.Open();
            try
            {
                //循环插入100万条数据，每次插入10万条，插入10次。
                for (int multiply = 0; multiply < 10; multiply++)
                {
                    for (int count = multiply * 100000; count < (multiply + 1) * 100000; count++)
                    {

                        sqlComm.Parameters["@p0"].Value = count;
                        sqlComm.Parameters["@p1"].Value = string.Format("User-{0}", count * multiply);
                        sqlComm.Parameters["@p2"].Value = string.Format("Pwd-{0}", count * multiply);
                        sw.Start();
                        sqlComm.ExecuteNonQuery();
                        sw.Stop();
                    }
                    //每插入10万条数据后，显示此次插入所用时间
                    Console.WriteLine(string.Format("Elapsed Time is {0} Milliseconds", sw.ElapsedMilliseconds));
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                sqlConn.Close();
            }

            Console.ReadLine();

第二种，用Bulk;

bulk方法主要思想是通过在客户端把数据都缓存在Table中，然后利用SqlBulkCopy一次性把Table中的数据插入到数据库

public static void BulkToDB(DataTable dt)
{
    SqlConnection sqlConn = new SqlConnection(
        ConfigurationManager.ConnectionStrings["ConnStr"].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 = Bulk.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();
        Bulk.BulkToDB(dt);
        sw.Stop();
        Console.WriteLine(string.Format("Elapsed Time is {0} Milliseconds", sw.ElapsedMilliseconds));
    }

    Console.ReadLine();
}

第三，表值参数法；

表值参数是SQL Server 2008新特性，简称TVPs。对于表值参数不熟悉的朋友，可以参考最新的book online；其速度比Bulk还快5s。

public static void TableValuedToDB(DataTable dt)
{
    SqlConnection sqlConn = new SqlConnection(
      ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString);
    const string TSqlStatement =
     "insert into BulkTestTable (Id,UserName,Pwd)" +
     " SELECT nc.Id, nc.UserName,nc.Pwd" +
     " FROM @NewBulkTestTvp AS nc";
    SqlCommand cmd = new SqlCommand(TSqlStatement, sqlConn);
    SqlParameter catParam = cmd.Parameters.AddWithValue("@NewBulkTestTvp", dt);
    catParam.SqlDbType = SqlDbType.Structured;
    //表值参数的名字叫BulkUdt，在上面的建立测试环境的SQL中有。
    catParam.TypeName = "dbo.BulkUdt";
    try
    {
      sqlConn.Open();
      if (dt != null && dt.Rows.Count != 0)
      {
          cmd.ExecuteNonQuery();
      }
    }
    catch (Exception ex)
    {
      throw ex;
    }
    finally
    {
      sqlConn.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 = TableValued.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();
        TableValued.TableValuedToDB(dt);
        sw.Stop();
        Console.WriteLine(string.Format("Elapsed Time is {0} Milliseconds", sw.ElapsedMilliseconds));
    }

    Console.ReadLine();
}