the crm data access layer

... operation of the CRM is the client component’s creation of the CRM Worker The client component then begins using the CRM Worker In the case of the XML CRM Worker, the client component would call the WriteToXML ... causes the CRM Compensator to be instantiated The CRM Worker writes records to the durable log obtained from the CRM Clerk The CRM Worker registers the name of the CRM Compensator to use with the CRM ... some XML to a file Module 9: The Transactional Data Access Layer 11 The second step is the CRM Worker’s use of another component provided by COM+: the CRM Clerk The CRM Worker uses this component...

Ngày tải lên: 05/11/2013, 12:15

... is the first of two modules that focus on the DAL: Module 8, The Nontransactional Data Access Layer and Module 9, The Transactional Data Access Layer. ” The DAL is an application’s means of access ... Introduction to the Data Access Layer The purpose of this section is to introduce students to the DAL and its main purpose, which is to buffer all other layers from the data services layer The section ... through the business logic layer The facades simply access whatever components they need in the DAL to accomplish their goals 4 Module 8: The Nontransactional Data Access Layer Splitting the DAL...

Ngày tải lên: 21/12/2013, 06:17

... operation of the CRM is the client component’s creation of the CRM Worker The client component then begins using the CRM Worker In the case of the XML CRM Worker, the client component would call the WriteToXML ... causes the CRM Compensator to be instantiated The CRM Worker writes records to the durable log obtained from the CRM Clerk The CRM Worker registers the name of the CRM Compensator to use with the CRM ... some XML to a file Module 9: The Transactional Data Access Layer 11 The second step is the CRM Worker’s use of another component provided by COM+: the CRM Clerk The CRM Worker uses this component...

Ngày tải lên: 17/01/2014, 09:20

... be returned The FindAll method, on the other hand, returns every user in the database without discrimination 172 CHAPTER ■ DATA ACCESS LAYER There is also a single method each for the remaining ... will perform the CRUD operations required by the clients of the model—most likely to be the ViewModel The objective of the DAL code is to protect the object schema from changes to the database schema ... corresponding table The database does not recognize that there is shared data between the different subclasses In Table 8–5, the User abstract class is ignored, and the two tables replicate the Name, EmailAddress,...

Ngày tải lên: 03/10/2013, 01:20

... to the experiment, a stable water level in the reservoir was kept by the overhead tank Once the bottom of the capillary tube contacted with water in the reservoir, the dynamic movement of the ... in the two monophasic regions; (ii) The liquid is incompressible and immiscible; (iii) There is no a noticeable pressure drop when the liquid contacts with the water reservoir The velocity of the ... Z R） (1) where h is the CR height, K is the permeability, L is the length of the capillary tube, Pc is the macroscopic capillary pressure, φ is the porosity, µ1 and µ are the viscosity of water...

Ngày tải lên: 05/09/2013, 17:03

... cần khai báo đối tượng Database Chẳng hạn như: Dim Set db As db = Database OpenDatabase(" \ \baigiang.mdb") Cú pháp đầy đủ phương thức OpenDatabase: Set database = OpenDatabase (dbname, options, ... truy cập liệu theo ODBC) dbOptimisticBatch Cho phép cập nhật theo lô (chỉ cách truy cập liệu theo ODBC) Lưu ý: Xét ví dụ sau: Dim Dim Set Set db rs db rs As Database As Recordset = OpenDataBase (" ... đối tượng Database sau: Dim db As Database Đối tượng Database có nhiều phương thức, ta xét qua phương thức quan trọng cho phép ta thao tác với sở liệu II.1.1 Sử dụng phương thức OpenDatabase để...

Ngày tải lên: 30/09/2013, 06:20

... from the user and then uses it as the primary key lookup value in the application’s sample DataTable Most of the code exists to ensure that the user provides a valid ID 60 Chapter 4  Accessing the ... expressionField.Text); This code adds the expression columns to the sample table, passing the column name, the data type from the System namespace, and the field expression Run the program On the Add Expression ... expressionField.Text) This code adds the expression columns to the sample table, passing the column name, the data type from the System namespace, and the field expression Run the program On the Add Expression...

Ngày tải lên: 03/10/2013, 00:20

... Background="White"> < /data: DataGrid> 10 Highlight the DataGrid definition in the solution and replace it with the following DataGrid definition, which is from the previous DataGrid ... NETWORKING ... /> < /data: DataGridTemplateColumn.CellTemplate> < /data: DataGridTemplateColumn>

Ngày tải lên: 05/10/2013, 03:20

... INTRODUCTION TO DATA ACCESS Listing 5-7 Saving the Registration of a New Player private NewsletterSubscriptionDataAccess subscriptionDataAccess; private MembershipDataAccess membershipDataAccess; public ... worse, the data- access operations that are called by the saveMembership RegistrationDetails() method can’t work in the same database transaction For data- access methods to operate in the same database ... TO DATA ACCESS Summary This chapter introduced you to some of the challenges of data access Data access is the single most influential factor for applications that build on top of databases The...

Ngày tải lên: 05/10/2013, 04:20

... bind the DataGridView to a DataTable The other is to bind the grid to a list of objects that have properties; the various properties will become the grid’s columns Binding to a DataSet is the ... These include the ListBox and CheckListBox classes Next, you’ll look at binding data to a more complicated control, the DataGridView class Data Binding and the DataGridView The DataGridView control, ... cause the SqlDataReader to be closed You must also close the corresponding SqlConnection object, which is done by linking the closing of the database connection to the closing of the SqlDataReader:...

Ngày tải lên: 05/10/2013, 10:20

... is usually the primary key of the parent entity, because as the primary key uniquely defines the parent, the child must in turn be associated with a unique instance of the parent The foreign ... normalizing a database, you accomplish the following Data consistency maintained " Lead-in Fewer null values The benefits of a normalized database are as follows: " Data consistency maintained Data is ... Designing Data Services and Data Models Module 3: Using a Conceptual Design for Data Requirements Module 4: Deriving a Logical Data Design Module 5: Normalizing the Logical Data Design In the next...

Ngày tải lên: 16/10/2013, 13:15

... standby databases • The operating system and platform architecture for the primary and standby databases must be the same • The operating system releases for the primary and standby databases ... this lesson, you should be able to the following: • Describe the Data Guard architecture • Explain the operational requirements of Data Guard • Describe how Data Guard processes, transports, and ... different • If all databases are on the same system, verify that the OS allows you to mount more than one database with the same name 2-3 Copyright © 2006, Oracle All rights reserved Data Guard Operational...

Ngày tải lên: 26/10/2013, 20:15

... and therefore the slower the response Ensuring data integrity One of the biggest benefits an RDBMS provides is that it protects the integrity of the data Once you place data into a relational database ... through the JDBC driver The driver converts the SQL statements to a format the database server understands and makes the network call using the correct protocol The JDBC driver abstracts the database−specific ... overview of the major components 13 Chapter 2: A Relational Database Primer Understanding data storage The purpose of a database is to safely store data How it organizes the data on the physical...

Ngày tải lên: 10/12/2013, 02:15

... or motion sensors to Another ready means to improve cooling is removing block- dim the lights when no one is in the data center; lights ages under the raised floor The basic cable management ... aisles hot and the cold more cooling dollars in the data center There is probably an aisles cold Aisles designated for cold air situate servers and other active program for cleaning above the raised ... airflow throughout the data center and reduce energy costs These include the following: • Move air conditioning units closer to heat sources • During cooler months and in the cool of the evening time,...

Ngày tải lên: 10/12/2013, 19:15

... System .Data – Để truy cập xử lý CSDL, sử dụng namespace System .Data, System .Data. Common, System .Data. OleDb, System .Data. SqlClient, System .Data. SqlTypes – Các lớp System .Data: DataSet, DataTable, DataRow, ... Mục lục ADO.NET Overview Using Database Connections Commands Quick Data Access: The Data Reader Working with DataSet Viewing NET data Example Data Access and Viewing with NET Editor: Đoàn ... data adapter – Tạo data set – Sử dụng phương thức Fill() data adapter Xây dựng cách thêm data table – Tạo DataSet – Tạo DataTable Khởi tạo data table cách thêm DataColumn Thêm dòng liệu vào data...

Ngày tải lên: 13/12/2013, 09:16

... and therefore the slower the response Ensuring data integrity One of the biggest benefits an RDBMS provides is that it protects the integrity of the data Once you place data into a relational database ... through the JDBC driver The driver converts the SQL statements to a format the database server understands and makes the network call using the correct protocol The JDBC driver abstracts the database−specific ... overview of the major components 13 Chapter 2: A Relational Database Primer Understanding data storage The purpose of a database is to safely store data How it organizes the data on the physical...

Ngày tải lên: 15/12/2013, 20:15

... which data access method best meets the needs of the scenario Write your answers below After completing the above steps, you will discuss your responses with the class The instructor will write the ... Identifying Data Access Requirements Exercise 1: Identifying a Data Access Method for a Scenario (10 minutes) ! Identify data access requirements Participate in small groups as assigned by the instructor ... by the instructor Validate the feasibility of the solution given in the scenario Make any comments in the space below After completing the above steps, you will discuss your responses with the...

Ngày tải lên: 21/12/2013, 06:16

... is usually the primary key of the parent entity, because as the primary key uniquely defines the parent, the child must in turn be associated with a unique instance of the parent The foreign ... normalizing a database, you accomplish the following Data consistency maintained " Lead-in Fewer null values The benefits of a normalized database are as follows: " Data consistency maintained Data is ... Designing Data Services and Data Models Module 3: Using a Conceptual Design for Data Requirements Module 4: Deriving a Logical Data Design Module 5: Normalizing the Logical Data Design In the next...

Ngày tải lên: 21/12/2013, 06:18

... manipulate the contents of the opened file First, specify the type of data in the file by setting the Type property If the file contains text data, specify the character set of the data in the file ... Run the project to test it • Click the Get Records button to retrieve the data Then change the name of Product to Tea and click Update Database To confirm that the change has been made in the database, ... Basic Open the POData.vbp project in the \Labs\Lab07\POData folder Open the code window for the db_Order class and examine the code in the Insert method Note that the code uses...

Ngày tải lên: 21/12/2013, 19:15

... (CSMA/CA), the device examines the media for the presence of a data signal If the media is free, the device sends a notification across the media of its intent to use it The device then sends the data ... defined by Data Link layer protocols The Data Link layer "sees" the logical topology of a network when controlling data access to the media It is the logical topology that influences the type of ... (CSMA/CD), the device monitors the media for the presence of a data signal If a data signal is absent, indicating that the media is free, the device transmits the data If signals are then detected...

Ngày tải lên: 22/12/2013, 13:17