[Windows Store App 開發筆記] 「頁面巡覽」以及「多參數傳遞」
前言
最近在試著開發Windows Store App，所以對頁面切換以及參數傳遞做了一些研究，今天就來和大家分享，如何利用類別定義，做到頁面間多參數的傳遞。
以下是一個簡單的範例，我們將兩個integer的變數，一起傳到第二頁做加總的動作。
實作
1. MainPage.xaml
1: <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
2: <Grid.RowDefinitions>
3: <RowDefinition Height="35*"/>
4: <RowDefinition Height="157*"/>
5: </Grid.RowDefinitions>
6: <StackPanel Grid.Row="0" Orientation="Horizontal">
7: <TextBlock x:Name="show" Text="10+10=" FontSize="36" VerticalAlignment="Center"/>
8: <Button x:Name="NextBtn" Content="Show Ans" FontSize="36" Click="NextBtn_Click"/>
9: </StackPanel>
10: </Grid>
2. MainPage.xaml.cs
在這之中我們定義了一個類別Num，用來存兩個integer的變數
1: class Num
2: {
3: public int num1 { get; set; }
4: public int num2 { get; set; }
5: public Num(int _num1, int _num2)
6: {
7: num1 = _num1;
8: num2 = _num2;
9: }
10: }
11: public sealed partial class MainPage : Page
12: {
13: public MainPage()
14: {
15: this.InitializeComponent();
16: }
17: private void NextBtn_Click(object sender, RoutedEventArgs e)
18: {
19: Num num = new Num(10, 10);
20: this.Frame.Navigate(typeof(MainPage2), num);
21: }
22:
23: }
3. MainPage2.xaml
1: <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
2: <Grid.RowDefinitions>
3: <RowDefinition Height="35*"/>
4: <RowDefinition Height="157*"/>
5: </Grid.RowDefinitions>
6: <StackPanel Grid.Row="0" Orientation="Horizontal">
7: <TextBlock x:Name="show" Text="" FontSize="36" VerticalAlignment="Center"/>
8: <Button x:Name="BackBtn" Content="Back" FontSize="36" Click="BackBtn_Click"/>
9: </StackPanel>
10: </Grid>
4. MainPage2.xaml.cs
註：GoBack()是一個相當好用的API喔!!!
1: public sealed partial class MainPage2 : Page
2: {
3: public MainPage2()
4: {
5: this.InitializeComponent();
6: }
7: protected override void OnNavigatedTo(NavigationEventArgs e)
8: {
9: Num tmp = (Num)e.Parameter;
10: int ans = tmp.num1 + tmp.num2;
11: show.Text = ans.ToString();
12: }
13:
14: private void BackBtn_Click(object sender, RoutedEventArgs e)
15: {
16: this.Frame.GoBack();
17: }
18: }
執行結果：
所以之後需要一次傳遞多個參數，自己定義一個類別來傳遞就可以囉，相當輕鬆簡單。