如何用Xamarin的随机列表更改标签

Question

我是Xamarin的新手，我想制作一个应用程序，每天都会更改短语。我想使用计时器更改短语。

我尝试了几个教程，但对我不起作用。

这是我XAML和C＃代码上的一个示例：

xaml

<ScrollView Grid.Row="1">
        <StackLayout Orientation="Vertical" Padding="30,24,30,24" Spacing="10">
            <Label x:Name="Label_Time" Text="[TIME]" FontSize="Title" HorizontalOptions="Center"/>
            <Label Text="before the new enigma" FontSize="Subtitle" HorizontalOptions="Center"/>
            <Label Text="You can resolve now or waiting tomorrow for a new enigma." FontSize="20" Padding="0,0,0,0"/>
            <Entry x:Name="Label_Answer" Placeholder="Enter the answer"/>
            <Button Text="Answer" BackgroundColor="#487eb0" Clicked="OnButtonClicked"/>
        </StackLayout>
    </ScrollView>

c＃

public void RandomEnigma(object sender, EventArgs e)
    {
        var enigmas = new List<string>()
        {
            "My first is the main color of the earth, my second can be used to move, my third is for surviving. My everything is a liquid. What is that ?",
            "Very childish, I can introduce children to programming. What is my name ?",
        };
    }

    private void OnButtonClicked(object sender, EventArgs e)
    {
        // WIP
    }

Answer 1

您可以在每次使用以下代码的情况下每次生成0和数组范围的数字：

    int range = enigmas.Count;

    Random rnd = new Random();
    int number = rnd.Next(0, range-1);  // creates a number between 0 and range-1

此后，将Arry的值分配给标签：

    mLabel.Text = enigmas[number];