What is the best way to reference uxml,uss from c# script?

I have seen many samples,and they used AssetDatabase.LoadAssetAtPath.
But this kind of reference is too much fragile for renaming or moving asset.
Using GUID seems to be robust,but too much complicated.Is there any good way?

 

I'm just trying to create UI with UI Toolkit.
How we could assign SerializeField of Editor or EditorWindow?

 

Yeah,we could assign any UnityEngine.Object to SerializeField of MonoBehaviour,or ScriptableObject from Inspector.
But where could we assign object to SerializeField of UnityEditor.Editor or UnityEditor.EditorWindow?
And here's built-in UIToolikit EditorWindow Templete,what unity officialy proposed.

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3. using UnityEngine.UIElements;
4. using UnityEditor.UIElements;
5.  
6.  
7. public class UIToolkitEditorWindow : EditorWindow
8. {
9.     [MenuItem("Window/Project/UIToolkitEditorWindow")]
10.     public static void ShowExample()
11.     {
12.         UIToolkitEditorWindow wnd = GetWindow<UIToolkitEditorWindow>();
13.         wnd.titleContent = new GUIContent("UIToolkitEditorWindow");
14.     }
15.  
16.     public void OnEnable()
17.     {
18.         // Each editor window contains a root VisualElement object
19.         VisualElement root = rootVisualElement;
20.  
21.         // VisualElements objects can contain other VisualElement following a tree hierarchy.
22.         VisualElement label = new Label("Hello World! From C#");
23.         root.Add(label);
24.  
25.         // Import UXML
26.         var visualTree = AssetDatabase.LoadAssetAtPath<VisualTreeAsset>("Assets/Main/UIToolkitEditorWindow.uxml");
27.         VisualElement labelFromUXML = visualTree.Instantiate();
28.         root.Add(labelFromUXML);
29.  
30.         // A stylesheet can be added to a VisualElement.
31.         // The style will be applied to the VisualElement and all of its children.
32.         var styleSheet = AssetDatabase.LoadAssetAtPath<StyleSheet>("Assets/Main/UIToolkitEditorWindow.uss");
33.         VisualElement labelWithStyle = new Label("Hello World! With Style");
34.         labelWithStyle.styleSheets.Add(styleSheet);
35.         root.Add(labelWithStyle);
36.     }
37. }

This code is too much fragile for renaming or moving asset.

 

Thanks! It works very well! I hope this solution documented.

But does it work for precompiled assembly?

Default generated code is very clear example,but I think it is not a good "default".
Default "NewBehaviourScript" or "NewPlayableAsset" doesn't behaves like it.

 

I am facing with a issue with your solution.
Default Reference could not work in PlayMode.
It throws NullReferenceException if I opened a inspector in PlayMode.

 

Hey RamType0,
I wrote myself a little helper method. This is a little more robust and you can work around the issue when moving assets around (solution). (This only works in Edit mode of course. If you need runtime support you need to handle the asset loading differently)

In Edit mode you then just have to call:

Code (CSharp):

1. LoadFirstAssetByFilter<VisualTreeAsset>("AwesomeTemplate")
2.  
3. or
4.  
5. LoadFirstAssetByFilter<StyleSheet>("AwesomeStyle")

with this solution you still have issues when changing the name ¯\_(ツ)_/¯ but at least for me it's a good compromise

Best Daniel

 

That was the reason. Thanks!

 

This saved me, thanks