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Relating DataWindows to Databases
Setting the Transaction Object for a DataWindow Object
Retrieving Data
Coding a Complete Retrieval Transaction
The DataWindow object is associated with a database through a transaction object using the SetTransObject( ) function.
The DataWindow control Retri
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Creating a DataWindow Object
1. Choose a presentation style
2. Choose a datasource
3. Describe the result set
4. Design the format for data presentation and validation
5. Use simultaneous preview during design, if desired
Data sources
Relational
Quick Select
SQL Select
Query
Stored Proced
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Access one item by specifying row and column numbers
Format:
dwcontrol.object.data[startrownum, startcolnum]
dwcontrol.object.data [ startrownum, startcolnum, endrownum, endcolnum ]
Example:
long ll_emp_id
ll_emp_id = dw_emp.object.data[1,2]
Data retrieved using a DataWindow object is he
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DataWindow workspace is divided into bands:
Header
Detail
Summary
Footer
The DataWindow painter provides layout and editing features.
SummaryYou use the DataWindow painter to set the tab order sequence for columns in a DataWindow object.
The DropDownDataWindow edit style provides a way to ass
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Updating the Database
Transaction Management
Saving Data Before Closing a Window
Printing Reports Using DataWindows
Use Update( ) to save changes in a DataWindow control.
Update( ) generates SQL statements based on the contents of the primary, filter, and delete buffers.
You can control the
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Objective
A position as a technical project manager for a U.S. company, working with database technologies in the financial industry.
Skills
Programming languages: Visual Basic, Java, C, C++
Scripting and markup languages: HTML, XML, JavaScript
Internet technologies: ASP, DHTML, Microsoft Trans
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