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GeneXus 15 course - Junior Level

You will easily learn, through different examples, the core of GeneXus in order to start developing your own applications.
Presentation
Online course
Materials

Introduction to For Each command to access the database

We introduce the Procedure object, with one of its multiple uses: implementing PDF listings displayed on the browser. We study two of the main commands for that: the print and the for each, which enables access to an entity’s data.


We focus on the Layout and Source chapters of a procedure for listing tourist attractions. We introduce the printblock control and see how to define the output design. We also see how to include images in the KB for them to be used in objects. We start the study of the For each command, which is basic in GeneXus. We introduce the base transaction of the For each, as well as the Order and Where clauses. We analyze the Navigation Listing.  

We strongly recommend that the ""Final Overview"" video be viewed, where we question some of the statements that will be considered in upcoming videos. 

This video also includes rule output_file, Call Protocol HTTP.

Click here for a PDF transcript of the video.
Related
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Procedures
Identifying availabe attributes
Filtering Data from a Web Panel’s Grid
Nested For Each command to list grouped data
Data Selectors: Reusing definitions
Simple For each – base table and order clause
Simple For each – base table and where clause
Simple For each – base table and order clause
Web panels: Determining the base table
More about single For each, indexes, and clauses
Orders, filters and conditions of listed data
Base tables and navigation in Smart Devices objects
Base tables and navigation in Smart Devices objects
Identifying available attributes. Base and Extended table.
43 Videos (07h 01min)
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