如何在按钮上打开 TimeSpanPicker(Coding4Fun 工具包)

问题描述

我在 XAML 中有按钮和 TimeSpanPicker.

I have button and TimeSpanPicker in XAML.

<Image x:Name="sleepButton" Source="img/Sleep.png"
       Grid.Row="2" Grid.Column="2" Grid.ColumnSpan="2"
       Stretch="None" Tap="sleepButton_Tap"/>

<controls:TimeSpanPicker x:Name="timespanPicker" Step="0:5" Value="0:0"
                         PickerPageUri="timePickerPage"
                         Grid.Column="1" Grid.Row="2"
                         Visibility="Collapsed" IsEnabled="False" />

这是我的代码.

private void sleepButton_Tap(object sender, GestureEventArgs e)
{
    TimeSpanPicker timespanPicker = new TimeSpanPicker();
    timespanPicker.PickerPageUri = new Uri("/MainPage.xaml", UriKind.Relative);
    timespanPicker.OpenPicker();
}

然后我点击按钮什么也不做.我做错了什么?

Then I click the button do nothing. What I'm doing wrong?

推荐答案

PickerPageUri 是如果您有自定义选择器控件(例如用于设置日期/时间的单个按钮，而不是显示 TimeSpanPicker).您还在这里创建了一个新的 TimeSpanPicker 实例，基本上覆盖了您的 xaml:

The PickerPageUri is if you have a custom picker control such as a single button to set the date/time, not to show the TimeSpanPicker. You're also creating a new instance of TimeSpanPicker here essentially overriding your xaml:

private void sleepButton_Tap(object sender, GestureEventArgs e)
{
    TimeSpanPicker timespanPicker = new TimeSpanPicker();
    ...

您应该能够调用 timespanPicker.OpenPicker();.不确定您是否需要启用它，但是是的，将可见性折叠起来.

You should just be able to call timespanPicker.OpenPicker();. Not sure if you'll need to enable it, but yes, have the visibility collapsed.

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