详解C#批量插入数据到Sqlserver中的四种方式

create database CarSYS; 
go 
use CarSYS; 
go 
CREATE TABLE Product(
Id UNIQUEIDENTIFIER PRIMARY KEY,
NAME VARCHAR(50) NOT NULL,
Price DECIMAL(18,2) NOT NULL
)

INSERT INTO Product(Id,Name,Price) VALUES(newid(),'牛栏1段',160);
INSERT INTO Product(Id,Name,Price) VALUES(newid(),'牛栏2段',260);
......

BULK INSERT [ [ 'database_name'.][ 'owner' ].]{ 'table_name' FROM 'data_file' } 
 WITH ( 
  [ BATCHSIZE [ = batch_size ] ], 
  [ CHECK_CONSTRAINTS ],  
  [ CODEPAGE [ = 'ACP' | 'OEM' | 'RAW' | 'code_page' ] ], 
  [ DATAFILETYPE [ = 'char' | 'native'| 'widechar' | 'widenative' ] ],  
  [ FIELDTERMINATOR [ = 'field_terminator' ] ], 
  [ FIRSTROW [ = first_row ] ], 
  [ FIRE_TRIGGERS ], 
  [ FORMATFILE = 'format_file_path' ], 
  [ KEEPIDENTITY ], 
  [ KEEPNULLS ], 
  [ KILOBYTES_PER_BATCH [ = kilobytes_per_batch ] ], 
  [ LASTROW [ = last_row ] ], 
  [ MAXERRORS [ = max_errors ] ], 
  [ ORDER ( { column [ ASC | DESC ] } [ ,...n ] ) ], 
  [ ROWS_PER_BATCH [ = rows_per_batch ] ], 
  [ ROWTERMINATOR [ = 'row_terminator' ] ],  
  [ TABLOCK ], 
 )

 BULK INSERT 
 [ database_name . [ schema_name ] . | schema_name . ] [ table_name | view_name ] 
 FROM 'data_file' 
 [ WITH 
 ( 
 [ [ , ] BATCHSIZE = batch_size ] --BATCHSIZE指令来设置在单个事务中可以插入到表中的记录的数量 
 [ [ , ] CHECK_CONSTRAINTS ] --指定在大容量导入操作期间，必须检查所有对目标表或视图的约束。若没有 CHECK_CONSTRAINTS 选项，则所有 CHECK 和 FOREIGN KEY 约束都将被忽略，并且在此操作之后表的约束将标记为不可信。 
 [ [ , ] CODEPAGE = { 'ACP' | 'OEM' | 'RAW' | 'code_page' } ] --指定该数据文件中数据的代码页 
 [ [ , ] DATAFILETYPE = 
 { 'char' | 'native'| 'widechar' | 'widenative' } ] --指定 BULK INSERT 使用指定的数据文件类型值执行导入操作。 
 [ [ , ] FIELDTERMINATOR = 'field_terminator' ] --标识分隔内容的符号 
 [ [ , ] FIRSTROW = first_row ] --指定要加载的第一行的行号。默认值是指定数据文件中的第一行 
 [ [ , ] FIRE_TRIGGERS ] --是否启动触发器 
 [ [ , ] FORMATFILE = 'format_file_path' ] 
 [ [ , ] KEEPIDENTITY ] --指定导入数据文件中的标识值用于标识列 
 [ [ , ] KEEPNULLS ] --指定在大容量导入操作期间空列应保留一个空值，而不插入用于列的任何默认值 
 [ [ , ] KILOBYTES_PER_BATCH = kilobytes_per_batch ] 
 [ [ , ] LASTROW = last_row ] --指定要加载的最后一行的行号 
 [ [ , ] MAXERRORS = max_errors ] --指定允许在数据中出现的最多语法错误数，超过该数量后将取消大容量导入操作。 
 [ [ , ] ORDER ( { column [ ASC | DESC ] } [ ,...n ] ) ] --指定数据文件中的数据如何排序 
 [ [ , ] ROWS_PER_BATCH = rows_per_batch ] 
 [ [ , ] ROWTERMINATOR = 'row_terminator' ] --标识分隔行的符号 
 [ [ , ] TABLOCK ] --指定为大容量导入操作持续时间获取一个表级锁 
 [ [ , ] ERRORFILE = 'file_name' ] --指定用于收集格式有误且不能转换为 OLE DB 行集的行的文件。 
 )]

 INSERT INTO Product(Id,Name,Price)
 SELECT NEWID(),'牛栏1段',160 
 UNION ALL 
 SELECT NEWID(),'牛栏2段',180
 UNION ALL
......

INSERT INTO Product(Id,Name,Price) VALUES
(newid(),'牛栏1段',160)
,(newid(),'牛栏2段',260)
......

#region 方式一
 static void InsertOne()
 {
  Console.WriteLine("采用一条一条插入的方式实现");
  Stopwatch sw = new Stopwatch();
  using (SqlConnection conn = new SqlConnection(StrConnMsg)) //using中会自动Open和Close 连接。
  {
  string sql = "INSERT INTO Product(Id,Name,Price) VALUES(newid(),@p,@d)";
  conn.Open();
  for (int i = 0; i < totalRow; i++)
  {
   using (SqlCommand cmd = new SqlCommand(sql, conn))
   {
   cmd.Parameters.AddWithValue("@p", "商品" + i);
   cmd.Parameters.AddWithValue("@d", i);
   sw.Start();
   cmd.ExecuteNonQuery();
   Console.WriteLine(string.Format("插入一条记录，已耗时{0}毫秒", sw.ElapsedMilliseconds));
   }
   if (i == getRow)
   {
   sw.Stop();
   break;
   }
  }
  }
  Console.WriteLine(string.Format("插入{0}条记录，每{4}条的插入时间是{1}毫秒,预估总得插入时间是{2}毫秒，{3}分钟",
 totalRow, sw.ElapsedMilliseconds, ((sw.ElapsedMilliseconds / getRow) * totalRow), GetMinute((sw.ElapsedMilliseconds / getRow * totalRow)), getRow));
 }
 static int GetMinute(long l)
 {
  return (Int32)l / 60000;
 } 
 #endregion

#region 方式二
 static void InsertTwo()
 {
  Console.WriteLine("使用Bulk插入的实现方式");
  Stopwatch sw = new Stopwatch();
  DataTable dt = GetTableSchema(); 
  using (SqlConnection conn = new SqlConnection(StrConnMsg))
  {
  SqlBulkCopy bulkCopy = new SqlBulkCopy(conn);
  bulkCopy.DestinationTableName = "Product";
  bulkCopy.BatchSize = dt.Rows.Count;
  conn.Open();
  sw.Start();
  for (int i = 0; i < totalRow;i++ )
  {
   DataRow dr = dt.NewRow();
   dr[0] = Guid.NewGuid();
   dr[1] = string.Format("商品", i);
   dr[2] = (decimal)i;
   dt.Rows.Add(dr);
  }
   if (dt != null && dt.Rows.Count != 0)
   {
   bulkCopy.WriteToServer(dt);
   sw.Stop();
   }
   Console.WriteLine(string.Format("插入{0}条记录共花费{1}毫秒，{2}分钟", totalRow, sw.ElapsedMilliseconds, GetMinute(sw.ElapsedMilliseconds)));
  }
 }
 static DataTable GetTableSchema()
 {
  DataTable dt = new DataTable();
  dt.Columns.AddRange(new DataColumn[] { 
 new DataColumn("Id",typeof(Guid)), 
 new DataColumn("Name",typeof(string)), 
 new DataColumn("Price",typeof(decimal))});
  return dt;
 }
 #endregion

CREATE TYPE ProductTemp AS TABLE(
Id UNIQUEIDENTIFIER PRIMARY KEY,
NAME VARCHAR(50) NOT NULL,
Price DECIMAL(18,2) NOT NULL
)

#region 方式四
 static void InsertFour()
 {
  Console.WriteLine("采用拼接批量SQL插入的方式实现");
  Stopwatch sw = new Stopwatch();
  using (SqlConnection conn = new SqlConnection(StrConnMsg)) //using中会自动Open和Close 连接。
  {
  conn.Open();
  sw.Start();
  for (int j = 0; j < totalRow / getRow;j++ )
  {
   StringBuilder sb = new StringBuilder();
   sb.Append("INSERT INTO Product(Id,Name,Price) VALUES");
   using (SqlCommand cmd = new SqlCommand())
   { 
   for (int i = 0; i < getRow; i++)
   {
    sb.AppendFormat("(newid(),'商品{0}',{0}),", j*i+i);
   }
   cmd.Connection = conn;
   cmd.CommandText = sb.ToString().TrimEnd(',');
   cmd.ExecuteNonQuery();
   }
  }
  sw.Stop();
  Console.WriteLine(string.Format("插入{0}条记录，共耗时{1}毫秒",totalRow,sw.ElapsedMilliseconds));
  }
 }
 #endregion