捕获点击类中的通用按钮的事件

Question

我正在处理WPF应用程序，其中大多数控件是在运行时动态创建的。为了保存一些代码，我创建了各种静态控件。现在，我想创建一个带有删除按钮的文本框控件。我现在卡住的地方是，我如何捕获控件的事件？ （看代码）

编辑： 建议我试着创建一个自定义控件。但是，我无法获得自定义事件的工作。即在wpf页面中，我无法找到删除事件以将处理程序挂接到它。我哪里做错了？到目前为止，我发现，当我放弃: Grid声明时，会显示事件。

public class tbTextReadOnlyWithDeleteButton : Grid 
{ 

    public event EventHandler Delete; 

    public tbTextReadOnlyWithDeleteButton(int gridrow, int gridcol, string feldname, object quelle, string ctlname, object tag) 
    { 
     Grid gr = new Grid() { Name = "grMit_" + gridrow + "_" + gridcol + "_" + ctlname }; 
     gr.SetValue(Grid.RowProperty, gridrow); 
     gr.SetValue(Grid.ColumnProperty, gridcol); 
     gr.ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(30) }); 
     gr.ColumnDefinitions.Add(new ColumnDefinition()); 
     gr.Tag = tag; 


     Button bu = new Button() { Name = "buLoeschen" }; 
     bu.SetValue(Grid.ColumnProperty, 0); 
     bu.Margin = new Thickness(5, 5, 5, 5); 
     bu.Content = "\xE10A"; 
     bu.FontFamily = new FontFamily("Segoe MDL2 Assets"); 
     bu.FontSize = 10; 
     bu.Tag = quelle; 
     bu.Click += Bu_Click; 


     TextBox tb = new TextBox(); 
     tb.SetValue(Grid.RowProperty, 0); 
     tb.SetValue(Grid.ColumnProperty, 1); 
     tb.IsReadOnly = true; 
     tb.VerticalContentAlignment = VerticalAlignment.Center; 
     tb.HorizontalContentAlignment = HorizontalAlignment.Left; 
     tb.Background = new SolidColorBrush() { Opacity = 1 }; 
     tb.BorderThickness = new Thickness(0); 
     tb.TextWrapping = TextWrapping.Wrap; 
     BindingOperations.SetBinding(tb, TextBox.TextProperty, new Binding(feldname) { Source = quelle, Mode = BindingMode.OneWay }); 

     gr.Children.Add(bu); 
     gr.Children.Add(tb); 


    } 

    private void Bu_Click(object sender, RoutedEventArgs e) 
    { 
     Delete(sender, e); 
    } 
} 

// in the page it looks like this: 
Grid tbMit = new tbTextReadOnlyWithDeleteButton(1, 0, "Name", mit, "name", dat); 

tbMit.Delete // <-- Why can't this be found?? 

末编辑

// Control 
    public static Grid tbTextReadOnlyWithDeleteButton(int gridrow, int gridcol, string feldname, object quelle) 
    { 
     Grid gr = new Grid(); 
     gr.SetValue(Grid.RowProperty, gridrow); 
     gr.SetValue(Grid.ColumnProperty, gridcol); 
     gr.ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(30)}); 
     gr.ColumnDefinitions.Add(new ColumnDefinition()); 


     Button bu = new Button() { Name = "buDelete" }; 
     bu.SetValue(Grid.ColumnProperty, 0); 
     bu.Margin = new Thickness(5, 5, 5, 5); 
     bu.Content = "\xE10A"; 
     bu.FontFamily = new FontFamily("Segoe MDL2 Assets"); 
     bu.FontSize = 10; 
     bu.Tag = quelle; 


     TextBox tb = new TextBox(); 
     tb.SetValue(Grid.RowProperty, 0); 
     tb.SetValue(Grid.ColumnProperty, 1); 
     tb.IsReadOnly = true; 
     tb.VerticalContentAlignment = VerticalAlignment.Center; 
     tb.HorizontalContentAlignment = HorizontalAlignment.Left; 
     tb.Background = new SolidColorBrush() { Opacity = 1 }; 
     tb.BorderThickness = new Thickness(0); 
     tb.TextWrapping = TextWrapping.Wrap; 
     BindingOperations.SetBinding(tb, TextBox.TextProperty, new Binding(feldname) { Source = quelle, Mode = BindingMode.OneWay }); 

     gr.Children.Add(bu); 
     gr.Children.Add(tb); 

     return gr; 
    } 

// Usage in Code 
Grid tbMit = glCtlTextbox.tbTextReadOnlyWithDeleteButton(1, 0, "Name", mit); 
spStackpanel.Children.Add(tbMit); 

//Now I need something like this, which is not working 
tbMit.buDelete.Click += buDelete__Click; 

有没有人有一丝如何处理这个，？

谢谢！

Answer 1

你有2个解决方案，以确定您的用户控件：

• XAML代码+背后
• 代码

在你的第一个例子，你可以没有发现删除，因为你是铸造你的类到网格。

网格定义中没有删除事件。

你应该这样做：

tbTextReadOnlyWithDeleteButton tbMit = new tbTextReadOnlyWithDeleteButton(1, 0, "Name", mit, "name", dat); 

tbMit.Delete += your_event_handler; 

我会建议你使用XAML +后面的代码的方法。 （没有人仅使用代码来定义控件）

您可以在Visual Studio中竖立单击任何项​​目文件夹，然后选择“用户控件”。

就可以自动将这些文件：

• your_control.xaml
• your_control.xaml。CS

C＃+ XAML：

C＃：

public partial class your_control : UserControl 
{ 
    public delegate void delete_event_handler(your_control sender); 
    public event delete_event_handler delete; 

    public your_control() 
    { 
     this.InitializeComponent(); 
    } 

    private void on_bu_click(object sender, RoutedEventArgs e) 
    { 
     // the event is null if there is no listeners bind to it 
     if (this.delete != null) 
      this.delete(this); 
    } 
} 

和XAML：

<UserControl x:Class="test_wpf.your_control" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     mc:Ignorable="d" 
     d:DesignHeight="300" d:DesignWidth="300"> 
<Grid> 
    <Grid.ColumnDefinitions> 
     <ColumnDefinition Width="3*" /> 
     <ColumnDefinition Width="*" /> 
    </Grid.ColumnDefinitions> 
    <!-- Use the FieldModifier property to define the visibility of the control outside the class--> 
    <TextBlock x:Name="tb" x:FieldModifier="private" >Your text</TextBlock> 
    <Button Grid.Column="1" x:Name="bu" x:FieldModifier="private" Click="on_bu_click">Delete</Button> 
</Grid> 

然后

public partial class MainWindow : Window 
{ 
    public MainWindow() 
    { 
     InitializeComponent(); 
     your_control control = new your_control(); 
     control.delete += on_delete; 
    } 

    public void on_delete(your_control sender) 
    { 
     // your stuff 
    } 
} 

代码唯一的方法：

public class your_control : UserControl 
{ 

    public TextBox tb { get; private set; } 
    public Button bu { get; private set; } 
    private Grid container; 

    public your_control (/* your params*/) 
    { 
     this.tb = this.build_textbox(); 
     this.bu = this.build_button(); 
     this.container = new Grid(); 
     this.Content = this.container; 
     this.container.Children.Add(this.tb); 
     this.container.Children.Add(this.bu); 
    } 

    private TextBox build_textbox() 
    { 
     TextBox tb = new TextBox(); 
     return tb; 
    } 

    private Button build_button() 
    { 
     Button bu = new Button(); 
     return bu; 
    } 
} 

然后：

public partial class MainWindow : Window 
{ 
    public MainWindow() 
    { 
     InitializeComponent(); 
     your_control control = new your_control(); 
     control.bu.Click += on_bu_click; 
    } 

    public void on_bu_click(object sender, EventArgs e) 
    { 
     // your stuff 
    } 
}