linq or ado net

ADO. NET -- Connection, Command ., Ado. netconnection The. NET Framework Data Provider includes four core objects: Connection, Command, DataReader, and DataAdapter. Here, I will just talk about the objects that are frequently used in SQL Server. The connection object SqlConnection, which is used in the namespace of Sys

ADO. NET will be used to build data awareness.. NET application. unlike ADO, ADO. NET is more universal, not so specific to the database design. ADO.

ADO. NET review-write your own SqlHelper class, ado. netsqlhelper Today, I reviewed the basics of ADO. NET and sorted out the points I think: Compile the SqlHelper class to facilitate the execution of database statements. In this case, you can directly call the method encaps

The trap of SQL statements with parameters in ADO. NET, ado. netsql1. Use Parameter // Using the constructor method, it is not recommended to write Parameter p = new Parameter ("@ id", value); cmd. parameters. add (p); // It is recommended to write Parameter p = new Parameter () {ParameterName = "@ id", Value = "Value"} in this way by using the object initiator "

Detailed description of DataReader In ADO. NET, ado. netdatareaderFeatures Schematic diagram PS: Read () moves the pointer down and destroys the previous one. Therefore, SqlDataReader is only input. GetValue () is used to find columns in the current row. SqlDataReader () feature. 1) The above schematic is described. 2) read-only SqlDataReader can only be obtained

when you deploy or replace the Running code. Scalability and availability. ASP. NET has been designed with Scalability considerations and added a feature specifically designed to improve performance in a clustered and multi-processor environment. In addition, the process is affected by ASP. NET Runtime Library is closely monitored and managed, so that when the process behavior is abnormal (leakage, deadloc

DataSet object so that the user can be exposed by means of machine operation (Ad Hoc), combined with data from multiple sources, or transmitted between layers. DataSet objects can also be used separately from. NET Framework data providers to manage local or XML data of applications. The ado.net Class is located in System. Data. dll and is integrated with the Xml Class in System. XML. dll. Ado.net provides functions similar to ActiveX Data Objects (

In ASP. NET, Json data is converted to ADO. NET DataSet object, jsonado.net There are many methods to convert Json data to ADO. NET DataSet. Newtonsoft. Json also provides DataSet Converter to convert Json data. However, in some cases, DataSet Converter does not work and may

How does. Net implement LINQ ~,. NetContent Introduction Two prerequisites for implementing LINQ Extension Method Lambda expression LINQ References This article describes how to implement LINQ. Only by knowing this can we better use it ~ If you are new

In ASP. NET, the actual project application of ADO. NET Entity Framework has doubts. About ADO. NET Entity Framework Theory, entry-level teaching articles have been a lot of, but few people talk about ASP. net projects, which are

Framework to query, insert, update, and delete objects. Link: http://tech.ddvip.com/2008-12/122853545597941.html Ado. Net entityframework MySQL provider Link: http://tech.ddvip.com/2009-01/1231492130105443.html . Net-ADO. NET Entity Framework

Ado. Net Object Model The ADO. Net object model has five main components: connection object, command object, datareader object, dataadapter object, and DataSet object. The components that are responsible for establishing online and data operations are called the data operation component (managed providers), which is co

[Index page][Download source code] Refined. NET 4.0 (10)-automatically update the database structure (Automatic Migrations) under the Code First of ADO. NET Entity Framework 4.3) Author: webabcd IntroductionNew Feature of ADO. NET Entity Framework 4.3: automatically update t

Since the launch of the ADO. NET Entity Framework, it has been popular, and it encapsulates a large numberCodeThe generated tool. You only need to establish the relationship between objects. The system will automatically add, delete, Createobject, attach, tolist ...... and so on. These methods basically include basic methods such as getting, deleting, and inserting, which are very convenient to use. Only in

= ds = new DataSet (); DataTable dt = new DataTable (); 2. Fill in the data to the able object da.Fill(ds, "TableName"); dt = ds.Tables["TableName"]; 3. attributes and methods for processing data in a DataTable TataTable object include: Name attribute/method descriptionRows. Add () method to insert new data RowsThe Rows [n]. Delete () method deletes the records of row n.The Rows. Count attribute obtains the number of Rows.Rows [I] ["ColumnName"] attribute to obtain the value of row I and colum

ADO. net name originated from ADO (ActiveX Data Objects), which is a broad class group used to access data in the past Microsoft technology. ADO is used. net name, because Microsoft, you want to indicate that this is in.. NET prog

introduce you to the data model, another major component in the database structure and MVC mode, and load data and pass the data to the View using LINQ to SQL. Before entering the subject of the article, I need to declare that although you will see the final application of some data models, the focus of this article is the concept of data terminals and Data Models in KBlog and MVC. Data Model The data model is one of the three main concepts in the MV

I believe that ASP. NET controls are quite comfortable to use, but I still feel that the controls have many defects. First, the portability is not very good,CodeThis is the king. The following provides the ADO. Net code. You only need to add this file to the app_code of the website project and modify several values so that you can easily access your local databas

This article introduces the ADO. NET Provider and ADO. NET Provider provided by DB2 9.0 + to support. NET 2.0. If you are interested in this, please take a look at it and it will help you. Although many of my friends are using. NET