UI Toolkit Linker and Binder 3.0.1 links runtime UI Toolkit elements to MonoBehaviour components and can copy values from component fields or properties into supported controls.

What the asset provides

• Four locator modes: Name, IndexNames, Guid, and Guids.
• Typed linker components that expose the linked VisualElement through Element and E.
• One-way polling data binding for supported UI Toolkit controls.
• VisualElement query extensions that use the same path and GUID search logic without a linker component.

Basic workflow

1. Create a UIDocument and assign its UXML asset and PanelSettings.
2. Add a linker component that matches the target UI Toolkit element type, for example UitkButton.
3. Assign the UIDocument to the linker.
4. Choose a linking mode and configure its locator.
5. Call LinkElement when needed, then use Element or E to access the typed element.
6. For a binder-capable linker, enable binding and select a source field or property.

using System.Collections;
using DA_Assets.ULB;
using UnityEngine;
using UnityEngine.UIElements;

public sealed class ToolbarView : MonoBehaviour
{
    [SerializeField] private UitkButton saveButton;

    private IEnumerator Start()
    {
        yield return null;
        Button button = saveButton.Element;
        button.clicked += OnSave;
    }

    private void OnSave()
    {
        Debug.Log(saveButton.Element.name);
    }
}

Linker components also call LinkElement automatically from Start. Call it again after replacing the UIDocument visual tree or changing the locator at runtime.

Version 3.0.1 API names

• Namespace and runtime assembly: DA_Assets.ULB.
• Base component: UitkLinkerBase.
• Typed linker: UitkLinker<TElement>.
• Typed linker with binding: UitkLinker<TElement, TBinding>.
• Binding types: MemberBinding and UitkBindingSettings.
• Direct lookup API: UitkQueryExtensions.

Compatibility

Concrete linker classes compile only when the corresponding UI Toolkit element type exists in the current Unity version. If a target type is unavailable, use another supported linker or query the UIDocument root directly.

The asset is distributed under the MIT license.