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Display form and Edit form controls act as containers for displaying and viewing entire records. Each container can hold a set of Card controls that display individual fields or provide a way to update those fields. Each card has a DataField property that specifies which field of the record it works on.
Predefined cards are defined for different data types and user experiences. For example, there may be a card to edit a number field with a Text input control, which is great for use with the keyboard. Another card might support editing a number by using a Slider control instead. With the form control selected, you can, in the right-hand pane, easily select a card based on a field.
Cards themselves contain controls. The controls of a card make up the experience for displaying and editing a single field. For example, a number card may consist of a Text box control to provide the display name of the field and a Text input control to provide an editor for the value of the field. The card may also have a Text box control that shows any validation errors that occur and a Text box control for the common asterisk to indicate that a field is required.
You can customize the controls of a predefined card by resizing it, moving it, hiding it, adding controls to it, and making other changes. You can also start with an entirely blank card, a "custom card", to which you add controls from scratch.
Predefined cards are locked by default. In a locked card, you can modify only certain properties of the card or the controls within the card, and you can't delete a locked card. You can show the card lock and unlock it on the View tab of the Advanced view. If a property is locked and can't be modified, it appears with a lock icon next to its name. Unlocking a card is an advanced activity and should be done with care, because automatic formula generation will no longer occur for the card, and you can't relock a card.
Within the form's container, the ThisItem record is available and contains all the fields of the record. For example, the card's Default property is often set to ThisItem.FieldName.
You can use the Parent reference to configure a control to reference the properties of a card. For example, a control should use Parent.Default to read the initial state of the field from the data source. By using Parent instead of directly accessing the information that you want, the card is better encapsulated, and you can change it to a different field without breaking internal formulas.
See Understand data cards for examples of how to customize, unlock, and create cards.
DataField – The name of the field within a record that this card displays and edits.
Default – The initial value of a control before it is changed by the user.
DisplayName – The user friendly name for a field in a data source.
Error – The user friendly error message to display for this field when validation fails.
Required – Whether a card, editing the field of a data source, must contain a value.
Update – The value to write back to the data source for a field.
BorderColor – The color of a control's border.
BorderStyle – Whether a control's border is Solid, Dashed, Dotted, or None.
BorderThickness – The thickness of a control's border.
Fill – The background color of a control.
Height – The distance between a control's top and bottom edges.
Valid – Whether a Card or Edit form control contains valid entries, ready to be submitted to the data source.
Visible – Whether a control appears or is hidden.
Width – The distance between a control's left and right edges.
X – The distance between the left edge of a control and the left edge of the screen.
Y – The distance between the top edge of a control and the top edge of the screen.
See Understand data cards for examples.