Question

我在php / yii2中搜索我的问题的解决方案。我正在使用DependDropdown小部件。

指导：我目前正在工作（假设＆＃39;应用程序＆＃39;）表格有列：

1.  Id    
2.  student_id
3.  university_id    [....rest....]

在我的ActiveForm中，我有一个下拉列表，让我们说学生的名字。它们被分组在模型中，但是如果有相同姓名和姓氏的学生，我想添加Depend Dropdown with Personal Identify Number来选择特定的人。但是具有此数字的列来自另一个表，而不是我的$model。应用程序表有student_id列，我希望将该student_id发送到ActiveForm，但是通过我的Dropdown用个人ID搜索它。我试着在示例中显示它

<droplist with names > 我选择例如Carl Dickens

<droplist with Personal number>

案例1：好的，在DB学生表中只有1个Carl Dickens。所以从droplist中只能选择一个数字

案例2： DB中有一些Carls Dickens。所有Carl Dickens的个人号码都会被删除到下拉列表中，所以你可以选择正确的个人号码

<droplist with Personal number>不是$model（应用程序）表中的列，这是我在ActiveForm中的问题。有人能帮助我吗？感谢

Answer 1

请将$ personal_number声明为模型中的变量

private async void OnSuspending(object sender, SuspendingEventArgs args)
{
    suspendDeferral = args.SuspendingOperation.GetDeferral();

    rootPage.NotifyUser("", NotifyType.StatusMessage);

    using (var session = new ExtendedExecutionSession())
    {
        session.Reason = ExtendedExecutionReason.SavingData;
        session.Description = "Pretending to save data to slow storage.";
        session.Revoked += ExtendedExecutionSessionRevoked;

        ExtendedExecutionResult result = await session.RequestExtensionAsync();
        switch (result)
        {
            case ExtendedExecutionResult.Allowed:
                // We can perform a longer save operation (e.g., upload to the cloud).
                try
                {
                    MainPage.DisplayToast("Performing a long save operation.");
                    cancellationTokenSource = new CancellationTokenSource();
                    await Task.Delay(TimeSpan.FromSeconds(10), cancellationTokenSource.Token);
                    MainPage.DisplayToast("Still saving.");
                    await Task.Delay(TimeSpan.FromSeconds(10), cancellationTokenSource.Token);
                    MainPage.DisplayToast("Long save complete.");
                }
                catch (TaskCanceledException) { }
                break;
            default:
            case ExtendedExecutionResult.Denied:
                // We must perform a fast save operation.
                MainPage.DisplayToast("Performing a fast save operation.");
                await Task.Delay(TimeSpan.FromSeconds(1));
                MainPage.DisplayToast("Fast save complete.");
                break;
        }

        session.Revoked -= ExtendedExecutionSessionRevoked;
    }

    suspendDeferral?.Complete();
    suspendDeferral = null;
}

private async void ExtendedExecutionSessionRevoked(object sender, ExtendedExecutionRevokedEventArgs args)
{
    //If session is revoked, make the OnSuspending event handler stop or the application will be terminated
    if (cancellationTokenSource != null){ cancellationTokenSource.Cancel(); }

    await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
    {
        switch (args.Reason)
        {
            case ExtendedExecutionRevokedReason.Resumed:
                // A resumed app has returned to the foreground
                rootPage.NotifyUser("Extended execution revoked due to returning to foreground.", NotifyType.StatusMessage);
                break;

            case ExtendedExecutionRevokedReason.SystemPolicy:
                //An app can be in the foreground or background when a revocation due to system policy occurs
                MainPage.DisplayToast("Extended execution revoked due to system policy.");
                rootPage.NotifyUser("Extended execution revoked due to system policy.", NotifyType.StatusMessage);
                break;
        }

        suspendDeferral?.Complete();
        suspendDeferral = null;
    });
}

php yii2表单字段依赖于表外字段

1 个答案: