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Discussion in 'UI Toolkit' started by qinghua_1223, Sep 14, 2022.

  1. qinghua_1223

    qinghua_1223

    Joined:
    Aug 19, 2022
    Posts:
    2
    as seeing in the picture, my code is below:
    const int itemNum = 5;
    var items = new List<string>(itemNum);
    for(int i = 0; i < itemNum; ++i)
    {
    items.Add(i.ToString());
    }
    var uiDoc = GetComponent<UnityEngine.UIElements.UIDocument>();
    var rootElement = uiDoc.rootVisualElement;
    var listView = rootElement.Q("List_server") as UnityEngine.UIElements.ListView;
    listView.makeItem = () => new Label();
    Action<VisualElement, int> bindItem = (e, i) => (e as Label).text = items;

    listView.bindItem = bindItem;
    listView.itemsSource = items;

    when scolling listview that bug thrown ArgumentOutOfRangeException: Index was out of range
     

    Attached Files:

    qinghua_1223, Sep 14, 2022
    #1

  2. ncerone_unity

    ncerone_unity

    Unity Technologies

    Joined:
    Jan 13, 2022
    Posts:
    33
    Hi,

    Using your code I had a error on this line:
    Action<VisualElement, int> bindItem = (e, i) => (e as Label).text = items;

    Changing it to:
    Action<VisualElement, int> bindItem = (e, i) => (e as Label).text = items;

    Which makes it compile, I'm not able to reproduce your ArgumentOutOfRangeException issue.
     
    ncerone_unity, Sep 15, 2022
    #2

  3. qinghua_1223

    qinghua_1223

    Joined:
    Aug 19, 2022
    Posts:
    2

    sorry codes is, i donot known why:
    Action<VisualElement, int> bindItem = (e, i) => (e as Label).text = items;

    but also had that bug.And function bindItem triggled, when scrolling, items were all visible in listview, i thought that function should not triggled,i donot known why that happened.
     
    qinghua_1223, Sep 17, 2022
    #3