Question

我正在尝试从WinForm dotnet应用程序中的领域数据库中删除对象，但是我的代码给了我这个错误

引发的异常：“ Realms.Exceptions.RealmInvalidObjectException”在 Realm.dll类型的异常 Realm.dll中发生了'Realms.Exceptions.RealmInvalidObjectException' 但未在用户代码中处理试图访问分离的行

Realm realm;
IQueryable<RObj> items;

public Form1()
    {
        InitializeComponent();
        var config = new RealmConfiguration("DB.realm");
        config.ShouldDeleteIfMigrationNeeded = true;
        realm = Realm.GetInstance(config);
        //WriteRealmTest();
    }

private void Form1_Load(object sender, EventArgs e)
    {
        items = realm.All<RObj>();

        listboxMain.DisplayMember = "title";
        listboxMain.ValueMember = "id";


        BindingSource bs = new BindingSource();
        bs.DataSource = items;
        listboxMain.DataSource = bs;

    }

private void listboxMain_KeyDown(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Delete)
        {
            int index = listboxMain.SelectedIndex;
            if (index < 0) { return; }
            RObj item = items.ElementAt(index);
            if (!item.IsValid)
                return;
            using (var trans = realm.BeginWrite())
            {
                realm.Remove(item);
                trans.Commit();            //when this line is commented, no error is raised
            }

        }
    }

Answer 1

我发现了问题，这对于面临相同问题的任何人都可以作为参考

我必须先从BindingSource中删除该项目，然后再将其从领域数据库中删除

在bs.RemoveAt(index)之前添加using (var trans = realm.BeginWrite())解决了该问题

领域删除有效对象会引发“尝试访问分离的行”错误

1 个答案: