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); } 复制代码 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();    } } 复制代码 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"); 复制代码 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]); 复制代码 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。