linq or ado net

designer of the JDBC interface must be an expert !! Ado. Net comes with a series of classes that support disconnected to access data, including dataset and datatable. This makes data access simple and its interfaces are easy to use. Ado. Net has the advantages of simple use of Microsoft products, and it is a bit coo

always the truth of it. Since a new connection is so painful, why not reuse existing connections?In fact, ADO. NET has provided us with an optimization method called connection pooling. A connection pool is one such container: it holds a certain number of physical connections to the database server. Therefore, when we need to connect to the database server, we simply go to the pool (container) to take out

As a loyal C # fan, VB. NET is rarely used for writing.Code. C # The meaning of several symbols can be expressed. In VB. NET, a lot of words are often needed to express the meaning (in another perspective, this may also be an advantage in the eyes of others ). Maybe the C/C ++/C # code is too much to read. Check VB again. net code, always think that the screen is

Introduction to ADO. NET object Connection, Command, DataReader, DataAdapter, DataSet, and DataTable in Winform Development, The ADO. NET technology mainly includes six objects, including Connection, Command, DataReader, DataAdapter, DataSet, and able. The following describes these six objects:(1) The main function of

ADO. NET basics and ado.net Basics * The program needs to interact with the database through ADO. NET, through ADO. NET can execute SQL in the program, ADO..

How to add an ADO. NET File Project The ADO. NET Entity Data Model version is also rapidly upgraded with the development of science and technology in the ERA. Next I will analyze Visual Studio before and after the upgrade. Hope to help you These three stored procedures must be mapped to the object class at the same t

Use of enumeration in ADO. NET Entity Framework 4 This article will introduce how to use enumeration in ADO. NET Entity Framework 4 to bring everyone into the world of ADO. NET. Enum is a common type, for example, used to indicate

1.Bulk copy operation) Copying data from one data source to another is a new feature of ADO. NET 2.0. The batch copy class provides the fastest way to migrate data from one data source to another. Each ADO. NET data provider provides a corresponding batch replication class. For example, in the SQL.

Download the test sample program Note: This test compares the read/write performance of ADO. NET, NBear, and NHibernate databases using the Categories, MERS MERs, and Products tables of the Northwind database of SqlServer2000. To be fair, the test code does not use many unique functions or caches of the special framework. Pre-read is performed before the actual test (ensure that metadata is loaded at the f

ado|excel| Connection Database | String ADO Connection Database string Encyclopedia (vp,excel, Text, Sybase,. NET, etc.) This page contains sample ADO connection strings for ODBC dsn/dsn-less, OLE DB Providers, remote Data Services (RDS), Ms Remote, Ms Datashape. Also included are ado.net connection strings for each.

Using system;using system.collections.generic;using system.linq;using system.text;using System.Threading.Tasks; Using system.diagnostics;using autodesk.autocad.runtime;using autodesk.autocad.databaseservices;using Autodesk.autocad.applicationservices;using autodesk.autocad.editorinput;///} } }}At present, LINQ is very efficient, and later development can be assured with LINQ two times development.

In mono (http://www.mono-project.com/Main_Page), the most important part of the implementation of LINQ has been included: Expression Tree, so you just need to "get" this part of the code, you can in.. NET 2.0, or even use "LINQ to DAC" to operate databases. Code related to the Expression Tree: Sample Code of LINQ:

In order to give full play to the advantages of ado.net, we need not only a comprehensive and in-depth understanding of ado.net programming model, but also experience and skills in time. ADO has many years of practical experience, ADO. NET on this basis, provides a richer and more powerful tools; however, ADO.

ADO. NET -- DataAdapter object DataAdapter object Source and function: In the ADO. NET object I introduced earlier, such as the Connection object, Command object, and DataReader object, all of these objects belong to the Data Provider and are connected-based. If we need to connect to the database every time we retrieve