C# .net 批量插入数据库的两种方法

普通的insert 语句插入就不介绍了，着重说一下高效的批量插入大数据的方法

第一种方式： bulk方法主要是客户端把数据都缓存在Table中，然后利用SqlBulkCopy把Table中的数据插入到数据库

BulkTable 这是已经创建的表

public static void BulkToDB(DataTable dt)

{

SqlConnection sqlConn = new SqlConnection(

ConfigurationManager.ConnectionStrings["ConnStr"].ConnectionString);

SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConn);

bulkCopy.DestinationTableName = "BulkTable";

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("Uname",typeof(string)),

new DataColumn("Upass",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("U-{0}", count * multiply);

r[2] = string.Format("P-{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();

}

第二种方式

使用表值参数是SQL Server 2008新特性，简称TVPs。 这个是目前速度最快的一个，局限是需要在数据库创建一个”用户自定义表类型“。创建方式

：可编辑性-->类型-->用户自定义表类型

首先先 创建 用户自定义类型 BulkUdt（名字自定义）

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();

}