Oracle DataTable的数据批量写入数据库

insert语句,sqldataadapter.update(dataset,tablename);sqlbulkcopy.WriteToServer(datatable);三个方法的性能进行比较：

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 dTable where 1=2", sqlconnection);
 DataSet dataset = new DataSet();
 sqldataadapter.Fill(dataset, "dTable"); 
 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); 
 }

1.使用sqlcommand.executenonquery()方法插入

foreach (DataRow datarow in datatable.Rows)
{
　　string sql = "INSERT INTO [dTable]([CompanyName],[CompanyCode],[Address],[Owner],[Memo])" +
　　"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();
   }
}

-插入20000条记录时间:00:00:29.7336000-

2.使用sqldataadapter.update(dataset,tablename);

SqlCommand insertcommand = new SqlCommand("INSERT INTO [dTable]([CompanyName],[CompanyCode],[Address],[Owner],[Memo])" +
"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, "dTable");   

-插入20000条记录时间:00:00:22.8938000-

3.使用sqlbulkcopy.writetoserver(datatable)

SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);
sqlbulkcopy.DestinationTableName = "dTable";//数据库中的表名
sqlbulkcopy.WriteToServer(dataset.Tables[0]);

-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。