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DataTable数据批量写入数据库三种方法比较

2016-01-29 11:32 591 查看

1) insert循环插入；
2) sqldataadapter.update(dataset,tablename);
3) sqlbulkcopy.WriteToServer(datatable);

1、生成测试的datatable表，表结构如下：
UniqueID(主键，自动增长) | CompanyName | CompanyCode | Address | Owner | Memo
共6个字段。

SqlConnection sqlconnection = new SqlConnection(connectionString);

SqlDataAdapter sqldataadapter = new SqlDataAdapter("select * from Table_1 where 1=2", sqlconnection);

DataSet dataset = new DataSet();

sqldataadapter.Fill(dataset, "Table_1");

DataTable datatable = dataset.Tables[0];

//生成20000条记录

for (int i = 0; i < 20000; i++)

{

DataRow datarow = datatable.NewRow();

datarow["CompanyName"] = "companyname"+string.Format("{0:0000}",i);

datarow["CompanyCode"] = "companycode" + string.Format("{0:0000}", i);

datarow["Address"] = "address" + string.Format("{0:0000}", i);

datarow["Owner"] = "owner" + string.Format("{0:0000}", i);

datarow["Memo"] = "memo" + string.Format("{0:0000}", i);

datatable.Rows.Add(datarow);

}

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2、使用sqlcommand.executenonquery()方法插入

foreach (DataRow datarow in datatable.Rows)

{

string sql = "INSERT INTO [Table_1]([CompanyName],[CompanyCode],[Address],[Owner],

)" +

"VALUES('" + datarow["CompanyName"].ToString() + "'" +

",'" + datarow["CompanyCode"].ToString() + "'" +

",'" + datarow["Address"].ToString() + "'" +

",'" + datarow["Owner"].ToString() + "'" +

",'" + datarow["Memo"].ToString() + "')";

using (SqlConnection sqlconn = new SqlConnection(connectionString))

{

sqlconn.Open(); SqlCommand sqlcommand = new SqlCommand(sql, sqlconn);

sqlcommand.ExecuteNonQuery();

sqlconn.Close();

}

}

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插入20000条记录时间:00:00:29.7336000

3、使用sqldataadapter.update(dataset,tablename);

SqlCommand insertcommand = new SqlCommand("INSERT INTO [Table_1]([CompanyName],[CompanyCode],[Address],[Owner],

)" +

"VALUES(@CompanyName, @CompanyCode,@Address,@Owner,@Memo)",new SqlConnection(connectionString));

insertcommand.Parameters.Add("@CompanyName", SqlDbType.NChar, 50, "CompanyName");

insertcommand.Parameters.Add("@CompanyCode", SqlDbType.NChar, 25, "CompanyCode");

insertcommand.Parameters.Add("@Address", SqlDbType.NChar, 255, "Address");

insertcommand.Parameters.Add("@Owner", SqlDbType.NChar, 25, "Owner");

insertcommand.Parameters.Add("@Memo", SqlDbType.NChar, 255, "Memo");

sqldataadapter.InsertCommand = insertcommand;

sqldataadapter.Update(dataset, "Table_1");

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插入20000条记录时间:00:00:22.8938000

4、使用sqlbulkcopy.writetoserver(datatable)

SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);

sqlbulkcopy.DestinationTableName = "Table_1";//数据库中的表名

sqlbulkcopy.WriteToServer(dataset.Tables[0]);

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插入20000条记录时间:00:00:00.3276000

所以说速度是sqlbulkcopy最快，sqldataadapter.update()次之，sqlcommand.ExecuteNonQuery()最慢。

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