Data Access Layer
Data Access Layer
... } CHAPTER 8 ■ DATA ACCESS LAYER 174 private void DisconnectFromDatabase() { if (_databaseConnection.State != ConnectionState.Open) { _databaseConnection.Close(); } } private IDataReader ExecuteReadCommand(IDbCommand ... tries to convert from one to the other (from objects to database tables or vice versa). CHAPTER 8 ■ DATA ACCESS LAYER 164 DATABASE KEYS Database tables should alwa...
Module 9: The Transactional Data Access Layer
... same data access technologies as that of the nontransactional DAL. The following data access technologies were covered in Module 8, “The Nontransactional Data Access Layer : ! Microsoft Data Access ... modules that focus on the data access layer (DAL). In Module 8, “The Nontransactional Data Access Layer, ” you learned about data retrieval. In this module, you wi...
Tài liệu Module 8: The Nontransactional Data Access Layer doc
... Nontransactional Data Access Layer
Microsoft Data Access Components
Other Data
Sources
Other Data
Sources
Relational
Databases
Relational
Databases
Data
Object
Interfaces
Data
Object
Interfaces
Application
Programming
Interfaces
Application
Programming
Interfaces
ADO ... Nontransactional Data Access Layer 5
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Nontransactional DAL Technologies
!
Micro...
Tài liệu Module 9: The Transactional Data Access Layer pptx
... Transactional DAL 22
Review 30
Module 9: The
Transactional Data
Access Layer
16 Module 9: The Transactional Data Access Layer
Components
!
Transactional Support
!
Synchronization
!
Activation
... Transactional Data Access Layer
Distributed Transactions
MS DTC
MS DTC
UPDATE UPDATE
For complex transactions that involve data modifications on multiple ro...
CÁC ĐỐI TƯỢNG TRUY CẬP DỮ LIỆU (DATA ACCESS OB
... OpenDatabase: Set database = OpenDatabase (dbname, options, read-only, connect) Ý nghĩa các tham số của phương thức OpenDatabase như sau: Thành phần Ý nghĩa database Biến kiểu đối tượng Database ... cần thông qua đối tượng đầu tiên đó là đối tượng Database. Trước tiên ta khai báo một đối tượng Database như sau: Dim db As Database Đối tượng Database có rất nhiều phương thức, ta sẽ chỉ xét ......
Data Access and Networking
... CHAPTER 6 ■ DATA ACCESS AND NETWORKING 147 < ;data: DataGrid x:Name="grdData" Margin="15" AutoGenerateColumns="False"> < ;data: DataGrid.Columns> < ;data: DataGridTemplateColumn ... Grid.Column="1" /> </Grid> </DataTemplate> < /data: DataGridTemplateColumn.CellTemplate> < /data: DataGridTemplateColumn> < ;dat...
Introduction to Data Access
... java.sql.SQLException; public class NewsletterSubscriptionDataAccess { private DataSource dataSource; public void setDataSource(DataSource dataSource) { this.dataSource = dataSource; } public void addNewsletterSubscription(int ... NewsletterSubscriptionDataAccess subscriptionDataAccess; public void subscribeMemberToNewsletter(Member member, String email) throws MyDataAccessException { subscri...
Data Access
... CHAPTER 9 ■ DATA ACCESS 211 7575Ch09.qxp 4/27/07 1:05 PM Page 211 system .data windows system.webServer mscorlib system .data. oledb system .data. oracleclient system .data. sqlclient configProtectedData ... Microsoft.Practices.EnterpriseLibrary .Data let opener commandString = let database = DatabaseFactory.CreateDatabase() database.ExecuteReader(CommandType.Text, commandString) CHAPTE...
Tài liệu java Data Access JDBC, JNDI, and JAXP pptx
... Sets
89
Creating DatabaseMetaData objects
A Connection object represents a database connection and also instantiates a DatabaseMetaData object with
the getMetaData() method. The DatabaseMetaData object ... DriverManager.getConnection(jdbcUrl,user,pwd);
//Initialize a DatabaseMetaData object
DatabaseMetaData dmd = conn.getMetaData();
//Retrieve database name and version
String dbname = dmd...
Tài liệu Bài 6: Data Access and Viewingwith .NET docx
...
System .Data. SqlTypes
System .Data. SqlTypes
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trong
trong
System .Data
System .Data
:
:
DataSet
DataSet
,
,
DataTable
DataTable
,
,
DataRow
DataRow
,
,
DataColumn
DataColumn
,
,
DataRelation
DataRelation
, Constraint
, Constraint
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: ... Overview
Using Database Connections
Using...