An editor is the user interface used to edit an entity. It consists of tabs and property editors.
Configuring an Editor
Using the Editor() Method
Accesses the editor configuration for the specified collection.
Method Syntax
Copy Editor(Lambda editorConfig = null) : EditorConfig<TEntityType> Example
Copy collectionConfig.Editor(editorConfig => {
...
}); Adding a Tab to an Editor
Using the AddTab() Method
Adds a tab to the editor.
Method Syntax
Copy AddTab(string name, Lambda tabConfig = null) : EditorTabConfigBuilder<TEntityType> Example
Copy editorConfig.AddTab("General", tabConfig => {
...
}); A sidebar is a smaller section displayed on the right side of the main editor. It can contain fieldsets and fields, similar to tabs, but with limited space. The sidebar is ideal for displaying entity metadata.
Configures the sidebar for the tab.
Method Syntax
Copy Sidebar(Lambda sidebarConfig = null) : EditorTabSidebarConfigBuilder<TEntityType> Example
Copy tabConfig.Sidebar(sidebarConfig => {
...
}); Setting the Visibility of a Tab
Using the SetVisibility() Method for Tabs
Determines the visibility of the tab at runtime.
Method Syntax
Copy SetVisibility(Predicate<EditorTabVisibilityContext> visibilityExpression) : EditorTabConfigBuilder<TEntityType> Example
Copy tabConfig.SetVisibility(ctx => ctx.EditorMode == EditorMode.Create); Adding a Fieldset to a Tab
Using the AddFieldset() Method
Adds a fieldset to a tab.
Method Syntax
Copy AddFieldset(string name, Lambda fieldsetConfig = null) : EditorFieldsetConfigBuilder<TEntityType> Example
Copy tabConfig.AddFieldset("Contact", fieldsetConfig => {
...
}); Setting the Visibility of a Fieldset
Using the SetVisibility() Method for Fieldsets
Determines the visibility of a fieldset at runtime.
Method Syntax
Copy SetVisibility(Predicate<EditorFieldsetVisibilityContext> visibilityExpression) : EditorFieldsetConfigBuilder<TEntityType> Example
Copy fieldsetConfig.SetVisibility(ctx => ctx.EditorMode == EditorMode.Create); Adding a Field to a Fieldset
Using the AddField() Method
Adds a property field to the editor.
Method Syntax
Copy AddField(Lambda propertyExpression, Lambda propertyConfig = null) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldsetConfig.AddField(p => p.FirstName, fieldConfig => {
...
}); Changing the Label of a Field
By default, Umbraco UI Builder converts property names into readable labels by splitting camel case names. You can override this behavior by setting an explicit label.
Using the SetLabel() Method
Sets a custom label for a field.
Method Syntax
Copy SetLabel(string label) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.SetLabel("First Name"); Hiding the Label of a Field
Sometimes, a field works better without a label, especially in full-width layouts.
Using the HideLabel() Method
Hides the field label.
Method Syntax
Copy HideLabel() : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.HideLabel(); Adding a Description to a Field
Using the SetDescription() Method
Adds a description to the field.
Method Syntax
Copy SetDescription(string description) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.SetDescription("Enter your age in years"); Changing the Data Type of a Field
By default, Umbraco UI Builder assigns a suitable Data Type for basic field types. However, you can specify a custom Data Type.
Using the SetDataType() Method
Assigns an Umbraco Data Type by name or ID.
Method Syntax (by name)
Copy SetDataType(string dataTypeName) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.SetDataType("Richtext Editor"); Method Syntax (by ID)
Copy SetDataType(int dataTypeId) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy
fieldConfig.SetDataType(-88); Setting the Default Value of a Field
Using the SetDefaultValue() Method
Sets a static default value.
Method Syntax
Copy SetDefaultValue(TValueType defaultValue) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy // Example
fieldConfig.SetDefaultValue(10); Using the SetDefaultValue() Method (Function-Based)
Defines a function to compute the default value at the time of entity creation.
Method Syntax
Copy SetDefaultValue(Func defaultValueFunc) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.SetDefaultValue(() => DateTime.Now); Making a Field Required
Using the MakeRequired() Method
Marks a field as required.
Method Syntax
Copy MakeRequired() : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeRequired(); Validating a Field
Using the SetValidationRegex() Method
Applies a regular expression for field validation.
Method Syntax
Copy SetValidationRegex(string regex) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Making a Field Read-only
Using the MakeReadOnly() Method
This method makes the current field read-only, preventing any user modifications in the UI. Once applied, the field's value remains visible but cannot be edited.
Method Syntax
Copy MakeReadOnly() : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly(); Using the MakeReadOnly(Func<TValueType, string>) Method
This method makes the current field read-only, preventing user edits in the UI. Additionally, it allows specifying a custom formatting expression, which determines how the field value is displayed as a string.
Method Syntax
Copy MakeReadOnly(Func<TValueType, string> format) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly(distanceProp => $"{distanceProp:## 'km'}"); Using the MakeReadOnly(object dataTypeNameOrId) Method
This method makes the current field read-only, preventing user edits in the UI. Additionally, it allows specifying a Data Type name or ID to determine how the field should be rendered when in read-only mode.
Method Syntax
Copy MakeReadOnly(object dataTypeNameOrId) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly("myReadOnlyEditor"); Using the MakeReadOnly(Predicate<>) Method
This method makes the current field read-only in the UI if the provided runtime predicate evaluates to true, preventing user edits.
Method Syntax
Copy MakeReadOnly(Predicate<EditorFieldReadOnlyContext> readOnlyExp) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly(ctx => ctx.EditorMode == EditorMode.Create); Using the MakeReadOnly(Predicate<>, Func<>) Method
This method makes the current field read-only in the UI if the provided runtime predicate evaluates to true, preventing user edits. It also allows specifying a custom formatting expression to render the field’s value as a string.
Method Syntax
Copy MakeReadOnly(Predicate<EditorFieldReadOnlyContext> readOnlyExp, Func<TValueType, string> format) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly(ctx => ctx.EditorMode == EditorMode.Create, distanceProp => $"{distanceProp:## 'km'}"); Using the MakeReadOnly(Predicate<>, Func<>) Method
This method makes the current field read-only in the UI if the provided runtime predicate evaluates to true, preventing user edits. It also allows specifying a Data Type name or ID to use when the field is in read-only mode.
Method Syntax
Copy MakeReadOnly(Predicate<EditorFieldReadOnlyContext> readOnlyExp, object dataTypeNameOrId) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.MakeReadOnly(ctx => ctx.EditorMode == EditorMode.Create, "myReadOnlyEditor"); Setting the Visibility of a Field
Using the SetVisibility() Method for Fields
Controls field visibility at runtime.
Method Syntax
Copy SetVisibility(Predicate<EditorFieldVisibilityContext> visibilityExpression) : EditorFieldConfigBuilder<TEntityType, TValueType> Example
Copy fieldConfig.SetVisibility(ctx => ctx.EditorMode == EditorMode.Create); 
