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Columns

Last modified: August 2, 2022

Common Properties

Class

The class property allows you to specify one or more cascading style sheet (CSS) classes for the widget. The classes should be separated by a space. The classes will be applied to the widget in the browser and the widget will get the corresponding styling. The classes should be classes in the theme that is used in the project. It overrules the default styling of the widget.

Styling is applied in the following order:

the default styling defined by the theme the project uses
the Class property of the widget
the Style property of the widget.

You can see which widgets in a page have styling applied via the class or style property by clicking the Show styles button.

Style

The style property allows you to specify additional CSS styling. If a class is also specified, this styling is applied after the class.

For example:

background-color:lightblue; color:red;

will result in red text on a blue background.

You can see which widgets in a page have styling applied via the style or class property by clicking the Show styles button.

Data Source Properties

Attribute (Path)

The attribute (path) property specifies the attribute’s value that will be displayed in this column. It can be an attribute of the grid entity, or it can be an attribute of an associated entity, in which case we speak of an attribute path. The path can follow multiple associations of type reference, and at the end (optionally) one of type reference set. If you show a reference set in a column the values will be separated by a comma.

Formatting Properties

Enumeration Format (Only for Attributes of the Enumeration Type)

A column connected to an attribute of type enumeration can show its contexts as text (default) or as image.

Value	Description
Text	Show the caption text of the enumeration.
Image	Show the image of the enumeration value.

Decimal Precision (Only for Decimal Attributes)

The precision of a value is defined the number of digits that is used to express that value. This property indicates the number of decimal places (the number of digits following the decimal point).

Default value: 2

Group Digits (Only for Numeric Attributes)

For ease of reading, numbers with many digits before the decimal separator may be divided into groups using a delimiter. This property defines whether the end user will see these groups, or not.

Default value: False

Date Format (Only for Attributes of the Type DateTime)

The date format determines whether the date part, the time part or both are shown. How the date and time parts are formatted depends on the localization of the user using the application.

These are the possible values:

Date (this is the default)
Time
Date and time
Custom (see below for more deteails)

Default value: Date

If you choose Custom as the date format, the custom date format determines the way date and/or time are formatted. The custom date format is a string that follows the rules in this table:

Symbol	Number of Symbols	Example	Example Result	Description
G	1	G	AD	Era
y	1–n	y	2010	Year
M	1–2	MM	09	Month (number)
M	3	MMM	Sept	Month (abbreviation)
M	4	MMMM	September	Month (full)
w	1–2	w	27	Week of year
D	1–3	DD	083	Day of year
a	1	a	AM	AM or PM
h	1–2	h	11	Hour (1-12)
H	1–2	HH	09	Hour (0-23)
k	1–2	k	10	Hour (1-24)
K	1–2	KK	05	Hour (0-11)
m	1–2	m	59	Minute
s	1–2	ss	06	Second

These are some examples:

Format	Example output
`EEEE d MMMM yyy G, h:mm a ss's`	Tuesday 29 March 2011 AD, 1:37 PM 48s
`h:mm a`	1:37 PM
`yyy D KK:mm`	2011 88 01:26

General Properties

Caption

The caption of a column is the text that appears as a header above the rows. This is a translatable text. See Translatable Texts.

Editable

The editable property indicates whether the values of the column will be editable inline, as in, without opening a page with a data view. In-line editing allows the data grid to behave like you would expect from a spreadsheet application.

Aggregate Function

The values in a column can be aggregated in several ways. The aggregate function determines the way in which the values are aggregated. The aggregate will be shown at the bottom of the column that precedes by the aggregate caption (see below).

Value	Description
None	Do not aggregate the values in the column.
Average	Show the average of the values.
Minimum	Show the smallest value.
Maximum	Show the largest value.
Sum	Show the sum of the values.
Count	Show the count of the values.

Note that all objects will be taken into account, and not just the ones on the current page.

Aggregate Caption

The aggregate caption is the text that appears in front of the computed value. This is a translatable text. See Translatable Texts.

‘Total’ could be an aggregate caption for a column that shows the sum of the values.

This property determines whether the tooltip page is shown as the mouse is hovered over this column. The tooltip page can be configured on the Data grid.