Validation rules
/pages/Guides/Mobile and Web Components/Grid/Grid Fields/Grid Field Properties/Display Settings/Validation Rules.xml
The Validation rules property defines how your grid component will respond when a user inputs data into an editable field. As with the Field Properties list, these rules change depending on what type of control you are working with.
Field Rule Field Events
/pages/Guides/Desktop/Design/Data/FieldRules/Field Rule Field Events.xml
When defining field rules for a table, there are two types of field rule events to which a script can be attached: Field events and Record events.
Handling Errors
/pages/Ref/Xbasic/Handling Errors.xml
An important part of writing any program is handling potential errors properly. You should do the same when writing an Xbasic script, making sure it can recover from some common run-time errors (e.g., when a file is not found, the disk is full, or the table is opened exclusively by another session or user).
Message box - DropDown Style
/pages/Ref/Action Javascript/Message box dropdown style.xml
Displays a message using a Dropdown Message box.
Field Rule Evaluation
/pages/Desktop/Reference/Design/Data/FieldRules/Field Rule Evaluation.xml
Before a record is saved to the table with either the .ENTER_END() or .CHANGE_END() methods, the validation field rules for each field must be satisfied. If a field value violates any validation rule, a run-time error occurs. The field's validation rules are checked every time you assign a value to it.
Error page 'Error' heading
/pages/Guides/Mobile and Web Components/Grid/The Detail View/Detail View Properties/Validation/errorpageerrorheading.xml
Specify column title for 'Error' column.
Creating a Posting Field Rule
/pages/Guides/Desktop/Design/Data/FieldRules/Creating a Posting Field Rule.xml
During data entry, you can post values in the current field to matching records in a second table, thus adding to, subtracting from, or replacing the value in a second table.
Error Functions
/pages/Ref/Api/Functions/Xbasic/Error Functions/index.xml
Functions for working with Xbasic errors.
Error page 'Row' heading
/pages/Guides/Mobile and Web Components/Grid/The Detail View/Detail View Properties/Validation/errorpagerowheading.xml
Specify column title for 'Row number' column.
Extension::Curl Error Method
/pages/Ref/Api/Namespace/Extension/Curl/Error Method.xml
Return curl error message.