DataTable数据批量写入数据库三种方法比较
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);
}
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();
}
}
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");
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]);
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。
原文地址：https://www.cnblogs.com/wfy680/p/12004526.html