Home arrow Delphi-Kylix arrow Page 3 - Using the Client Dataset in Two-Tiered Client/Server Applications

Using the Client Dataset in Two-Tiered Client/Server Applications

Client-server based applications have a number of advantages over file-based applications. To make such an approach work, however, the client dataset requires a provider component. This article will introduce you to the dataset provider component.

Author Info:
By: Danish Ahmed
Rating: 5 stars5 stars5 stars5 stars5 stars / 5
December 26, 2007
  1. · Using the Client Dataset in Two-Tiered Client/Server Applications
  2. · Two-Tiered Architecture
  3. · Using Data-Aware Components with the Client Dataset
  4. · Navigating and Modifying Data Programatically

print this article

Using the Client Dataset in Two-Tiered Client/Server Applications - Using Data-Aware Components with the Client Dataset
(Page 3 of 4 )

Once the data has been loaded into memory, the client dataset can be used as a typical dataset providing features to sort, filter, navigate, alter and perform every other function that a dataset should be able to do. Let us now focus on how to navigate and work with records in the client dataset.

After populating the client dataset you can add data-aware controls (available in data controls tab in the tools palette in Delphi IDE ) to the form or data module to navigate through the records and modify them. There are more than a dozen data-aware controls available in the Delphi IDE, so make sure that the data-aware component you are using can handle the data type of the field to which it is linked. For instance, if you want to display a field whose data type is string and size is 15, you should bind it with a DBEdit component.

If you are not new to Delphi then you are very well aware that data-aware components require a TDataSource component to communicate with the dataset. Make sure the dataset property in the DataSource component refers to the instance of the client dataset we are working with and specify it in the data source property of the data-aware controls.

You can add the TDBNavigator component to allow the user to move between records and modify them. DBNavigator's data source property should point to the same data source that is being referred to by the data-aware components. The DBNavigator component consists of several buttons, each representing a specific database operation. You can move to next record, previous record, first and last records and also insert, edit, undo during an edit and delete records; you can also refresh the dataset to reflect the current value of the data source. If you wish to disable some of these buttons you can access them from the Visible Buttons property of the DBNavigator component. 

blog comments powered by Disqus

- Loading an XML Document into the DOM
- Delphi Wrapper Classes and XML
- Delphi and the DOM
- Delphi and XML
- Internet Access: Client Service
- Finishing the Client for an Internet Access ...
- The Client for an Internet Access Control Ap...
- User Management for an Internet Access Contr...
- Important Procedures for an Internet Access ...
- Server Code for an Internet Access Control A...
- Constructing the Interface for an Internet A...
- Building a Server Application for an Interne...
- Building an Internet Access Control Applicat...
- Client Dataset: Working with Data Packets an...
- Using the Client Dataset in an N-Tiered Appl...

Watch our Tech Videos 
Dev Articles Forums 
 RSS  Articles
 RSS  Forums
 RSS  All Feeds
Write For Us 
Weekly Newsletter
Developer Updates  
Free Website Content 
Contact Us 
Site Map 
Privacy Policy 

Developer Shed Affiliates


© 2003-2019 by Developer Shed. All rights reserved. DS Cluster - Follow our Sitemap
Popular Web Development Topics
All Web Development Tutorials