designing the data access layer
Module 9: The Transactional Data Access Layer
Ngày tải lên :
05/11/2013, 12:15
... the second 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 ... transactional DAL then processes the requests by delegating the requests to the data services layer The transactional DAL can return to the business logic layer either success or failure If the transaction ... CRM The first step in the 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...
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Tài liệu Module 8: The Nontransactional Data Access Layer doc
Ngày tải lên :
21/12/2013, 06:17
... 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...
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Tài liệu Module 9: The Transactional Data Access Layer pptx
Ngày tải lên :
17/01/2014, 09:20
... the second 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 ... transactional DAL then processes the requests by delegating the requests to the data services layer The transactional DAL can return to the business logic layer either success or failure If the transaction ... CRM The first step in the 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...
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Data Access Layer
Ngày tải lên :
03/10/2013, 01:20
... 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,...
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Instructor Notes Module 11: Designing the Presentation Layer
Ngày tải lên :
22/10/2013, 16:15
... proper feedback to the user and user-friendly help Emphasize that the task of the designer is to see the application from the viewpoint of the typical user, not from the viewpoint of the experienced ... that designers must use the concepts and metaphors of the user when designing an interface Additionally, emphasize the importance of basing the design on the use cases and other artifacts developed ... Designing the Presentation Layer Module Strategy Use the following strategy to present this module: ! Application Presentation Layer This section introduces the concept of a presentation layer consisting...
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Tài liệu Module 11: Designing the Presentation Layer pdf
Ngày tải lên :
17/01/2014, 09:20
... from either the user interface or from other systems 388 Module 11: Designing the Presentation Layer Duality of the Presentation Layer Slide Objective To identify the composition of the presentation ... Module 11: Designing the Presentation Layer ! Application Presentation Layer Slide Objective To introduce the section " Purpose of the Presentation Layer " Duality of the Presentation Layer " Benefits ... functionality Data store The presentation layer has two parts, the user interface and the user services The user interface is how users interact with the system To users, the user interface often is the...
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DIRECT TREATMENT OF POLLUTED RIVER WATER BY THE MULTI-SOIL-LAYERING METHOD
Ngày tải lên :
05/09/2013, 08:40
... of the other parameters, which was probably due to excess aerobic condition in the MSL systems shown in ORP values near 400 mV Open top of the MSL systems allowed air enter the inside of the ... T-N contents in soil mixture layers and zeolite layers at each depth of MSL1, and Depths were the distances from the top surface of zeolite layer - 102 - CONCLUSION The results of this study revealed ... diameter) was installed between the second and the third soil mixture layers Two porous pipes for inlet of river water were installed on the surface of zeolite layer Hydraulic loading rate was...
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CÁC ĐỐI TƯỢNG TRUY CẬP DỮ LIỆU (DATA ACCESS OB
Ngày tải lên :
30/09/2013, 06:20
... 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...
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Data Access and Networking
Ngày tải lên :
05/10/2013, 03:20
... 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>
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Introduction to Data Access
Ngày tải lên :
05/10/2013, 04:20
... 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...
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Data Access
Ngày tải lên :
05/10/2013, 10:20
... 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:...
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Tài liệu java Data Access JDBC, JNDI, and JAXP pptx
Ngày tải lên :
10/12/2013, 02:15
... 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...
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Tài liệu Module 4: Designing the Client Experience pdf
Ngày tải lên :
10/12/2013, 16:16
... Module 4: Designing the Client Experience 41 The DataGrid Control One of the most powerful data- bound controls is the DataGrid control You can bind it to a data source, such as an ADO.NET DataSet, ... appearance of the results of the DataGrid 42 Module 4: Designing the Client Experience Customizing the Appearance of the DataGrid Control The following is an example of a customized DataGrid control: ... map the tag to the namespace of the run-time component The remainder of the tag is the name of the run-time class itself Third-party controls will be released in their own namespace, and therefore,...
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Tài liệu Module 5: Managing the Business Logic Layer pptx
Ngày tải lên :
10/12/2013, 16:16
... state in the back end The disadvantages are: The database resources required in storing state information The computing cost that is incurred by frequently moving data from the client to the database ... Because the ASP.NET session is stored externally from the worker process, the state data can be accessed by another worker process These worker processes could be running on another processor on the ... whether to hold the unit price of an item in the cart or retrieve this directly from the database when the user proceeds to the checkout Also, a decision needs to be made on whether to write the...
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Tài liệu Module 6: Transaction Processing on the Business Logic Layer docx
Ngày tải lên :
10/12/2013, 16:16
... when the call returns: The return value of the method call does not reflect the success or failure of the call on the server Therefore, there is no way to inform the caller about the result of the ... whether the purchase takes place immediately or at a later time when the supplier can supply the goods Each of these purchasing calculations forms part of the business logic of the application The ... of the component on the local system The local component records the method call made by the client application The local component sends a representation of the method call through MSMQ to the...
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Tài liệu Bài 6: Data Access and Viewingwith .NET docx
Ngày tải lên :
13/12/2013, 09:16
... 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...
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Tài liệu Mapping Table and Column Names Between the Data Source and DataSet docx
Ngày tải lên :
14/12/2013, 18:16
... DataSet, the column names used in the DataSet default to the column names defined in the data source A DataAdapter has a collection of DataTableMapping objects in its DataTableMappingCollection accessed ... submitting DataSet changes back to the data source In the solution, the Categories table retrieved by the query is mapped to a table in the DataSet called tblmapCategories with the following code: DataTableMapping ... property These objects map the name of a table in the data source to a DataTable with different name in the DataSet When a batch query is used to fill multiple tables within a DataSet, the table...
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Tài liệu Java Data Access—JDBC, JNDI, and JAXP ppt
Ngày tải lên :
15/12/2013, 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...
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Designing the syllabus- báo cáo nghiên cứu khoa học giáo viên
Ngày tải lên :
18/12/2013, 09:30
... understand the others, they will not be able to respond effectively and thus fail to persuade the others of their ideas In summary, from the results of the two surveys- one on the employers and the other ... efficiently The last final mentioned problems are about the employees’ ability to understand the others and to make the others understand them In essence, these two problems are mainly resulted from their ... 2.2.2.2 Primary data In addition to secondary data, primary data were also gathered in order to answer the second research question about the expected contents of the designed syllabus They were got...
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