如何填充文本框-Windows Phone 8.1

-1

當我從另一個xaml（菜單）中選擇項目時，我想要做的事情基本上是在一個xaml（Basket）中填充項目名稱的文本框。我的代碼如下：如何填充文本框-Windows Phone 8.1

Menu.xaml

在這裏，當我點擊一個按鈕，我希望它automaticallly出現在Basket.xaml一個文本框。

public class PassedData 
    { 
     public string Name { get; set; } 
     public int Value { get; set; } 
    } 
    private void Vanbtn_Click(object sender, RoutedEventArgs e) 
    { 


     Frame.Navigate(typeof(Basket), new PassedData { Name = "Cheese" }); 
    } 

    private void LCbtn_Click(object sender, RoutedEventArgs e) 
    { 
     Frame.Navigate(typeof(Basket), new PassedData { Name = "Crisp" }); 
    }

Basket.xaml

 protected override void OnNavigatedTo(NavigationEventArgs e) 
    { 
     Menu.PassedData data = e.Parameter as Menu.PassedData; 
    /** ItemChosentxt.Text = data.Name; 
     ItemChosentxt2.Text = data.Name; 
     ItemChosentxt3.Text = data.Name; 
     ItemChosentxt4.Text = data.Name;**/ 


    }

的註釋部分增加了選擇的項目的名稱。而不是僅僅添加到一個文本框就會添加到所有的文本框中。即如果我在Menu.xaml中選擇了vanilla btn，則名稱將出現在所有4個文本框中，而不僅僅是一個。所以，我決定實施每個文本框代碼：

private void ItemChosentxt_TextChanged(object sender, TextChangedEventArgs e) 
    { 
     Menu.PassedData data = e.Parameter as Menu.PassedData; 
     ItemChosentxt.Text = data.Name; 
    } 

    private void SecItem_TextChanged(object sender, TextChangedEventArgs e) 
    { 
     Menu.PassedData data = e.Parameter as Menu.PassedData; 
     SecItem.Text = data.Name; 
    }

這顯示一個錯誤的e.Parameter下面的錯誤代碼是 -

Severity Code Description Project File Line Suppression State 
    Error CS0103 The name 'data' does not exist in the current context

和

Severity Code Description Project File Line Suppression State 
Error CS1061 'TextChangedEventArgs' does not contain a definition for 'Parameter' and no extension method 'Parameter' accepting a first argument of type 'TextChangedEventArgs' could be found (are you missing a using directive or an assembly reference?)

我正在開發一個購物應用程序，例如如果用戶從菜單中選擇「香草」和「蛋糕」，我該如何讓名稱顯示在籃子文本框中？我對應用程序開發不熟悉，並對長期問題表示歉意。

來源

2016-04-08 Smith Sunny

問題是您沒有爲PassedData提供TextChangedEventArgs e。

編譯器是專門在你

喊說e.Paramenter（TextChangedEventArgs不具有「參數」構件）
用於使用「數據」，這是因爲未定義1。

但是，我推薦一種完全不同的方法。只需使用一個列表視圖（和數據綁定）。
實施例：

Basket.xaml

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> 
    <ListView ItemsSource="{Binding PassedData}" HorizontalAlignment="Center" VerticalAlignment="Center"> 
     <ListView.ItemTemplate> 
      <DataTemplate> 
       <Grid> 
        <Grid.ColumnDefinitions> 
         <ColumnDefinition Width="auto"/> 
         <ColumnDefinition Width="auto"/> 
        </Grid.ColumnDefinitions> 
        <Grid.RowDefinitions> 
         <RowDefinition Height="auto"/> 
        </Grid.RowDefinitions> 
        <TextBox Grid.Column="0" Text="{Binding Name}" /> 
        <TextBox Grid.Column="1" Text="{Binding Value}" /> 
       </Grid> 
      </DataTemplate> 
     </ListView.ItemTemplate> 
    </ListView> 
</Grid>

Basket.xaml.cs

using System.Collections.ObjectModel; 
using System.ComponentModel; 
using Windows.UI.Xaml; 
using Windows.UI.Xaml.Controls; 
using Windows.UI.Xaml.Navigation; 

    // namespace ... 

public sealed partial class Basket : Page 
{ 
    private static ObservableCollection<Menu.PassedData> passedData = new ObservableCollection<Menu.PassedData>(); 
    public ObservableCollection<Menu.PassedData> PassedData 
    { 
     get { return passedData; } 
     set { passedData = value; } 
    } 


    /*Events*/ 

    public event PropertyChangedEventHandler PropertyChanged; 

    /*Methods*/ 

    /// Fires PropertyChangedEventHandler, for bindables 
    protected void OnPropertyChanged(string name) 
    { 
     var ev = PropertyChanged; 
     if (ev != null) 
     { 
      ev(this, new PropertyChangedEventArgs(name)); 
     } 
    } 

    public Basket() 
    { 
     this.InitializeComponent(); 
     this.DataContext = this; 
    } 

    protected override void OnNavigatedTo(NavigationEventArgs e) 
    { 
     Menu.PassedData data = e.Parameter as Menu.PassedData; 
     /** ItemChosentxt.Text = data.Name; 
      ItemChosentxt2.Text = data.Name; 
      ItemChosentxt3.Text = data.Name; 
      ItemChosentxt4.Text = data.Name;**/ 
     if (data != null) 
     { 
      PassedData.Add(data); 
     } 

    } 

    private void Button_Click(object sender, RoutedEventArgs e) 
    { 
     Frame.Navigate(typeof(Menu)); 
    } 
}

}

來源

2016-04-09 00:56:14

如何填充文本框-Windows Phone 8.1

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