將自定義事件從一頁發送到另一頁

我正在用C#和Xaml制作一個UWP 桌面應用程式，它是學校專案的銀行應用程式，我正在努力解決付款歷史邏輯。

我希望用戶在Page1上的文本框中輸入一些價格，然后按下按鈕，然后應用程式將導航到主螢屏。如果付款成功（這個邏輯已經在我的應用程式中，你不必關注它）在Page2中將創建文本塊（但用戶將無法看到它，除非他打開Page2 )

第 1 頁.xaml

<Grid>
    <StackPanel Orientation="Vertical" VerticalAlignment="Top">
        <TextBox x:Name="Money" Height="100" Header="Enter your money"/>
        <Button
                x:Name="MyBtn"
                Click="Button_Click"
                Content="Ok"
                Margin="30"/>
    </StackPanel>
</Grid>

頁面 1.xaml.cs

public partial class Page1 : Page
{
    public Page1()
    {
        this.InitializeComponent();
    }

    public delegate void PaymentEventHandler(object sender, EventArgs args);

    public event PaymentEventHandler SuccessfullPayment;

    protected virtual void OnSuccessfullPayment()
    {
        if (SuccessfullPayment != null)
        {
            SuccessfullPayment(this, EventArgs.Empty);
        }
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        //in case that payment is successful (this logic is unnecesary in this example)

        OnSuccessfullPayment();
        this.Frame.Navigate(typeof(MainBankPage)); 
    }


}

第 2 頁.xaml

<Grid>  
    <ScrollViewer>
        <StackPanel x:Name="RootLayout" Orientation="Vertical" />
    </ScrollViewer>
</Grid>

頁面 2.xaml.cs

public sealed partial class Page2 : Page
{
    public Page2()
    {
        this.InitializeComponent();
    }

    
    public void Initialization()
    {
        var payment= new Page1();
        payment.SuccessfullPayment  = CreateTextBlock;
    }

    public void CreateTextBlock(object sender, EventArgs e)
    {
        var textblock = new TextBlock();
        textblock.Margin = new Thickness(0, 20, 15, 0);
        textblock.Width = 400;
        textblock.Height = 60;
        textblock.FontSize = 20;
        textblock.HorizontalAlignment = HorizontalAlignment.Left;
        textblock.Text = "Payment was successfull";
        RootLayout.Children.Add(textblock);
    }
    
    
}

主頁

There are only 6 buttons which user can interact with to navigate between pages in my app so I think it is unnecessary to show code

I was trying to do it through custom events (it is shown in the example), but it didn't work.

I am kinda new in app development so if this is stupid way to do it I am open for other options

Note: my app is much more complex I just want to know how to do this specific thing so I have created this simple example :)

Hope everything is clear to you if not comment and I will try to improve the question as much as I can.

Thank you so much for your time and answers.

uj5u.com熱心網友回復：

如果沒有人注冊來處理它，那么引發事件就毫無意義。如果我正確理解您的問題，則Page2在您引發事件時沒有創建，Page1因此這將不起作用。

您可以將資訊存盤在某個全域物件中，而不是引發事件，該物件可以隨時隨地從應用程式中的任何位置訪問。

例如，您可以創建一個靜態類：

public static class AppInfo
{
    public static string SharedInfo { get; set; }
}

...并從任何頁面獲取和設定它的屬性，例如：

第1頁：

private void Button_Click(object sender, RoutedEventArgs e)
{
    //in case that payment is successful (this logic is unnecesary in this example)
    AppInfo.SharedInfo = "Payment was successfull";
    OnSuccessfullPayment();
    this.Frame.Navigate(typeof(MainBankPage)); 
}

第2頁：

public void Initialization()
{
    var textblock = new TextBlock();
    textblock.Margin = new Thickness(0, 20, 15, 0);
    textblock.Width = 400;
    textblock.Height = 60;
    textblock.FontSize = 20;
    textblock.HorizontalAlignment = HorizontalAlignment.Left;
    textblock.Text = AppInfo.SharedInfo;
    RootLayout.Children.Add(textblock);
}

標籤：c# xaml events uwp

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