Prework script are commonly used to control process data or task state before assign to the users.
Prework script defined area is reached from related task. When you click on "Prework script" button on the task, prework script page will open.
Example:
In prework script following objects are available:
$WorkItem
Current workitem instance.
$Xml
Xml data navigator for data model.
$Instance $Initiator $TestMode $Priority $Culture /wiki/spaces/EMK/pages/9930714 $Database
Current workflow instance.
Initiator of the workflow instance.
A boolean value that specifies the current workflow instance is in test mode.
A value between 0 to 5 specifies the priority of the workflow instance.
A string value that specifies the initiated culture of the workflow instance. (Example: "en" or "de" or "tr")
Translation dictionary that provides localized texts.
Provides methods to query relational database.
$Membership $Calendar $XmlRepository $Domain $Services $Messages $Crypto $Delegation $Files $Documents
Provides methods to access the organization database.
Provides methods for time based calculations and working hours calendar.
Provides methods to query non-relational databases.
Allows accessing domain preferences.
Allows accessing defined web services.
Allows sending email messages.
Performs cryptographic and digital signature operations.
Allows accessing user delegation library.
Allows accessing file repository.
Allows accessing document repository.
Common operations
Auto Process Task
Automatically process current work item without assign to users and skip to next step in workflow.
$WorkItem.SelectedAction = 'Approve';
Dynamic Deadline Date
Set deadline date by user entered data.
$WorkItem.DeadlineDate = $Xml.EvaluateDateTime('PaymentDate');