Data Read Previous
Last updated
Last updated
Data Read Previous is a regular block that initiates reading of the previous page of records from a database table.
The block consists of the following (from top to bottom):
Table: Value Parameter that accepts a text value representing the name of the Database Table .
Dataset Name: Value Parameter that accepts a text value representing the name of the dataset.
NOTE:
This block only functions if a previous database read, using a Data Read or a Data Read Next block, for the same table and dataset, was initiated and completed.
The same database Query with input parameters and Per Page values that were provided with the Data Read block will be used here.
This block initiates the database read, which will occur in the background. To track the status and to take an action upon completion of the read, use the Data Status block.
To access the records after a successful read, see Data Record Count, Data Record Loop, Data Record at Index blocks.
The image below shows an example of the Data Read Previous block.
Here is a summary of the above example:
The Mouse/Keyboard Action block is used to handle a button click.
When the button is clicked, the Data Read Previous block is used to initiate a read for the next page.
The Data Status block is used to track the status of the read and upon success, the do something function is invoked.
