Academic Tutorials



English | French | Portugese | German | Italian
Home Advertise Payments Recommended Websites Interview Questions FAQs
News Source Codes E-Books Downloads Jobs Web Hosting
Chats

VC++
VC++ Introduction
VC++ What's New
VC++ Supported Platforms
Visual C++ Settings
VC++ Breaking Changes
Visual C++ Walkthroughs
Visual C++ Editions
VC++ Project Templates
Visual C++ Guided Tour
VC++ Creating Command-Line Applications
VC++ Windows Applications
VC++ Reusable Code
VC++ Porting
VC++ Unix Users
VC++ Upgrade Wizard
VC++ Migration Primer
VC++ Managed Types
VC++ Member Declarations
VC++ Conversion Operators
VC++ Interface Member
VC++ Value Types
VC++ Boxed Value
VC++ General Language
VC++ Common Programming
VC++ Database Support
VC++ MFC Database Classes
VC++ Record
VC++ Record View
VC++ OLE DB Programming

HTML Tutorials
HTML Tutorial
XHTML Tutorial
CSS Tutorial
TCP/IP Tutorial
CSS 1.0
CSS 2.0
HLML
XML Tutorials
XML Tutorial
XSL Tutorial
XSLT Tutorial
DTD Tutorial
Schema Tutorial
XForms Tutorial
XSL-FO Tutorial
XML DOM Tutorial
XLink Tutorial
XQuery Tutorial
XPath Tutorial
XPointer Tutorial
RDF Tutorial
SOAP Tutorial
WSDL Tutorial
RSS Tutorial
WAP Tutorial
Web Services Tutorial
Browser Scripting
JavaScript Tutorial
VBScript Tutorial
DHTML Tutorial
HTML DOM Tutorial
WMLScript Tutorial
E4X Tutorial
Server Scripting
ASP Tutorial
PERL Tutorial
SQL Tutorial
ADO Tutorial
CVS
Python
Apple Script
PL/SQL Tutorial
SQL Server
PHP
.NET (dotnet)
Microsoft.Net
ASP.Net
.Net Mobile
C# : C Sharp
ADO.NET
VB.NET
VC++
Multimedia
SVG Tutorial
Flash Tutorial
Media Tutorial
SMIL Tutorial
Photoshop Tutorial
Gimp Tutorial
Matlab
Gnuplot Programming
GIF Animation Tutorial
Scientific Visualization Tutorial
Graphics
Web Building
Web Browsers
Web Hosting
W3C Tutorial
Web Building
Web Quality
Web Semantic
Web Careers
Weblogic Tutorial
SEO
Web Site Hosting
Domain Name
Java Tutorials
Java Tutorial
JSP Tutorial
Servlets Tutorial
Struts Tutorial
EJB Tutorial
JMS Tutorial
JMX Tutorial
Eclipse
J2ME
JBOSS
Programming Langauges
C Tutorial
C++ Tutorial
Visual Basic Tutorial
Data Structures Using C
Cobol
Assembly Language
Mainframe
Forth Programming
Lisp Programming
Pascal
Delphi
Fortran
OOPs
Data Warehousing
CGI Programming
Emacs Tutorial
Gnome
ILU
Soft Skills
Communication Skills
Time Management
Project Management
Team Work
Leadership Skills
Corporate Communication
Negotiation Skills
Database Tutorials
Oracle
MySQL
Operating System
BSD
Symbian
Unix
Internet
IP-Masquerading
IPC
MIDI
Software Testing
Testing
Firewalls
SAP Module
ERP
ABAP
Business Warehousing
SAP Basis
Material Management
Sales & Distribution
Human Resource
Netweaver
Customer Relationship Management
Production and Planning
Networking Programming
Corba Tutorial
Networking Tutorial
Microsoft Office
Microsoft Word
Microsoft Outlook
Microsoft PowerPoint
Microsoft Publisher
Microsoft Excel
Microsoft Front Page
Microsoft InfoPath
Microsoft Access
Accounting
Financial Accounting
Managerial Accounting
Network Sites


Using a Record View


Previoushome Next






Using a Record View

This topic explains how you might commonly customize the default code for record views that the wizard writes for you.
A D V E R T I S E M E N T
Typically, you want to constrain the record selection with a filter or parameters, perhaps sort the records, customize the SQL statement.
This information applies to both CRecordView (ODBC) and CDaoRecordView (DAO).

Using CRecordView or CDaoRecordView is much the same as using CFormView. The basic approach is to use the record view to display and perhaps update the records of a single recordset. Beyond that, you might want to use other recordsets as well, as discussed in Record Views: Filling a List Box from a Second Recordset.




Record View Code Created by Application Wizard

The MFC Application Wizard overrides the view's OnInitialUpdate and OnGetRecordset member functions. After the framework creates the frame window, document, and view, it calls OnInitialUpdate to initialize the view. OnInitialUpdate obtains a pointer to the recordset from the document. A call to the base class CView::OnInitialUpdate function opens the recordset. The following code shows this process for a CRecordView the code for a CDaoRecordView is similar:
Copy Code
void CSectionForm::OnInitialUpdate()
{
   m_pSet = &GetDocument()->m_sectionSet;
   CRecordView::OnInitialUpdate();
}

When the recordset opens, it selects records. CRecordset::Open or CDaoRecordset::Open makes the first record the current record, and DDX moves data from the recordset's field data members to the corresponding form controls in the view. For more information about RFX, see Record Field Exchange (RFX). For more information about DDX, see Dialog Data Exchange and Validation. For information about the document/view creation process, see Using the Classes to Write Applications for Windows.

Note:
You should give your end users the capability to refresh the record view controls from the recordset. Without this capability, if a user changes a control's value to an illegal value, the user can be permanently stuck on the current record. To refresh the controls, you call the CWnd member function UpdateData with a parameter of FALSE.



Changes You Might Make to the Default Code

The MFC Application Wizard writes a recordset class for you that selects all records in a single table. You will often want to modify that behavior in one or more of the following ways:
  • Set a filter or a sort order for the recordset. Do this in OnInitialUpdate after the recordset object is constructed but before its Open member function is called. For more information, see Recordset: Filtering Records (ODBC) and Recordset: Sorting Records (ODBC).
  • Parameterize the recordset. Specify the actual run-time parameter value after the filter. For more information, see Recordset: Parameterizing a Recordset (ODBC)
  • Pass a customized SQL string to the Open member function. For a discussion of what you can accomplish with this technique , see SQL: Customizing Your Recordset's SQL Statement (ODBC).




Filling a List Box from a Second Recordset

By default, a record view is associated with a single recordset object, whose fields are mapped to the record view's controls. Sometimes you might want to put a list box or combo box control in your record view and fill it with values from a second recordset object. The user can use the list box to select a new category of information to display in the record view. This topic explains how and when to do that.
Tip:
Be aware that filling a combo box or list box from a data source might be slow. Take precautions against trying to fill a control from a recordset with a large number of records.

The model for this topic consists of a primary recordset that fills the controls of your form, while a secondary recordset fills a list box or combo box. Selecting a string from the list box causes your program to requery the primary recordset based on what was selected. The following procedure uses a combo box but applies equally to a list box.

To fill a combo box or list box from a second recordset

  1. Create the recordset object (CRecordset for ODBC, CDaoRecordset for DAO).
  2. Obtain a pointer to the CComboBox object for the combo box control.
  3. Empty the combo box of any previous contents.
  4. Move through all records in the recordset, calling CComboBox::AddString for each string from the current record you want to add to the combo box.
  5. Initialize the selection in the combo box.
Copy Code
void CSectionForm::OnInitialUpdate()
{
    // ...

    // Fill the combo box with all of the courses
    CENROLLDoc* pDoc = GetDocument();
    if (!pDoc->m_courseSet.Open())
        return;

    // ...

    m_ctlCourseList.ResetContent();
    if (pDoc->m_courseSet.IsOpen())
    { 
        while (!pDoc->m_courseSet.IsEOF() )
        {
            m_ctlCourseList.AddString(
                pDoc->m_courseSet.m_CourseID);
            pDoc->m_courseSet.MoveNext();
        }
    }
    m_ctlCourseList.SetCurSel(0);
}

This function uses a second recordset, m_courseSet, which contains a record for each course offered, and a CComboBox control, m_ctlCourseList, which is stored in the record view class.

The function gets m_courseSet from the document and opens it. Then it empties m_ctlCourseList and scrolls through m_courseSet. For each record, the function calls the combo box's AddString member function to add the course ID value from the record. Finally, the code sets the combo box's selection.



Be the first one to comment on this page.




  VC++ eBooks

No eBooks on VC++ could be found as of now.

 
 VC++ FAQs
More Links » »
 
 VC++ Interview Questions
More Links » »
 
 VC++ Articles
More Links » »
 
 VC++ News
More Links » »
 
 VC++ Jobs
More Links » »

Share And Enjoy:These icons link to social bookmarking sites where readers can share and discover new web pages.
  • blinkbits
  • BlinkList
  • blogmarks
  • co.mments
  • connotea
  • del.icio.us
  • De.lirio.us
  • digg
  • Fark
  • feedmelinks
  • Furl
  • LinkaGoGo
  • Ma.gnolia
  • NewsVine
  • Netvouz
  • RawSugar
  • Reddit
  • scuttle
  • Shadows
  • Simpy
  • Smarking
  • Spurl
  • TailRank
  • Wists
  • YahooMyWeb

Previoushome Next

Keywords: bsd programming language, bsd language programming tutorial pdf, history of bsd programming, basic bsd programming, bsd band satellite programming, syntax use in bsd programming, bsd programming software download, turbo bsd programming, bsd programming code, learn bsd programming

HTML Quizzes
HTML Quiz
XHTML Quiz
CSS Quiz
TCP/IP Quiz
CSS 1.0 Quiz
CSS 2.0 Quiz
HLML Quiz
XML Quizzes
XML Quiz
XSL Quiz
XSLT Quiz
DTD Quiz
Schema Quiz
XForms Quiz
XSL-FO Quiz
XML DOM Quiz
XLink Quiz
XQuery Quiz
XPath Quiz
XPointer Quiz
RDF Quiz
SOAP Quiz
WSDL Quiz
RSS Quiz
WAP Quiz
Web Services Quiz
Browser Scripting Quizzes
JavaScript Quiz
VBScript Quiz
DHTML Quiz
HTML DOM Quiz
WMLScript Quiz
E4X Quiz
Server Scripting Quizzes
ASP Quiz
PERL Quiz
SQL Quiz
ADO Quiz
CVS Quiz
Python Quiz
Apple Script Quiz
PL/SQL Quiz
SQL Server Quiz
PHP Quiz
.NET (dotnet) Quizzes
Microsoft.Net Quiz
ASP.Net Quiz
.Net Mobile Quiz
C# : C Sharp Quiz
ADO.NET Quiz
VB.NET Quiz
VC++ Quiz
Multimedia Quizzes
SVG Quiz
Flash Quiz
Media Quiz
SMIL Quiz
Photoshop Quiz
Gimp Quiz
Matlab Quiz
Gnuplot Programming Quiz
GIF Animation Quiz
Scientific Visualization Quiz
Graphics Quiz
Web Building Quizzes
Web Browsers Quiz
Web Hosting Quiz
W3C Quiz
Web Building Quiz
Web Quality Quiz
Web Semantic Quiz
Web Careers Quiz
Weblogic Quiz
SEO Quiz
Web Site Hosting Quiz
Domain Name Quiz
Java Quizzes
Java Quiz
JSP Quiz
Servlets Quiz
Struts Quiz
EJB Quiz
JMS Quiz
JMX Quiz
Eclipse Quiz
J2ME Quiz
JBOSS Quiz
Programming Langauges Quizzes
C Quiz
C++ Quiz
Visual Basic Quiz
Data Structures Using C Quiz
Cobol Quiz
Assembly Language Quiz
Mainframe Quiz
Forth Programming Quiz
Lisp Programming Quiz
Pascal Quiz
Delphi Quiz
Fortran Quiz
OOPs Quiz
Data Warehousing Quiz
CGI Programming Quiz
Emacs Quiz
Gnome Quiz
ILU Quiz
Soft Skills Quizzes
Communication Skills Quiz
Time Management Quiz
Project Management Quiz
Team Work Quiz
Leadership Skills Quiz
Corporate Communication Quiz
Negotiation Skills Quiz
Database Quizzes
Oracle Quiz
MySQL Quiz
Operating System Quizzes
BSD Quiz
Symbian Quiz
Unix Quiz
Internet Quiz
IP-Masquerading Quiz
IPC Quiz
MIDI Quiz
Software Testing Quizzes
Testing Quiz
Firewalls Quiz
SAP Module Quizzes
ERP Quiz
ABAP Quiz
Business Warehousing Quiz
SAP Basis Quiz
Material Management Quiz
Sales & Distribution Quiz
Human Resource Quiz
Netweaver Quiz
Customer Relationship Management Quiz
Production and Planning Quiz
Networking Programming Quizzes
Corba Quiz
Networking Quiz
Microsoft Office Quizzes
Microsoft Word Quiz
Microsoft Outlook Quiz
Microsoft PowerPoint Quiz
Microsoft Publisher Quiz
Microsoft Excel Quiz
Microsoft Front Page Quiz
Microsoft InfoPath Quiz
Microsoft Access Quiz
Accounting Quizzes
Financial Accounting Quiz
Managerial Accounting Quiz
Testimonials | Contact Us | Link to Us | Site Map
Copyright 2008. Academic Tutorials.com. All rights reserved Privacy Policies | About Us
Our Portals : Academic Tutorials | Best eBooksworld | Beyond Stats | City Details | Interview Questions | Discussions World | Excellent Mobiles | Free Bangalore | Give Me The Code | Gog Logo | Indian Free Ads | Jobs Assist | New Interview Questions | One Stop FAQs | One Stop GATE | One Stop GRE | One Stop IAS | One Stop MBA | One Stop SAP | One Stop Testing | Webhosting in India | Dedicated Server in India | Sirf Dosti | Source Codes World | Tasty Food | Tech Archive | Testing Interview Questions | Tests World | The Galz | Top Masala | Vyom | Vyom eBooks | Vyom International | Vyom Links | Vyoms | Vyom World
Copyright 2003-2017 Vyom Technosoft Pvt. Ltd., All Rights Reserved.