Question

我想在文本框中添加点击事件，但我的代码不起作用。单击文本框时，事件不会运行。

以下是

背后的代码

public class Day : INotifyPropertyChanged
{
    public delegate void ClickEventHandler(object sender, ClickEventArgs e);

    public event Application_IAD.TEST.Day.ClickEventHandler onClick;

    protected virtual void onTheClick()
    {
        if (onClick != null) onClick(this, new ClickEventArgs(new Day()));
    }
} 

public class Cal : Control
{
    public ObservableCollection<Day> Days { get; set; }

    public event EventHandler<ClickEventArgs> DayClick;

    public Cal()
    {
        DataContext = this;
        CurrentDate = DateTime.Today;
        DayNames = new ObservableCollection<string> {"Dim", "Lun", "Mar", "Mer", "Jeu", "Ven", "Sam"};

        Days = new ObservableCollection<Day>();
        BuildCalendar(DateTime.Today);
    }

    public void BuildCalendar(DateTime targetDate)
    {
        Days.Clear();

        //Show 6 weeks each with 7 days = 42
        for (int box = 1; box <= 42; box++)
        {
            Day day = new Day {Date = d, Enabled = true, IsTargetMonth = targetDate.Month == d.Month};
            day.onClick += test;
        }
    }

    private void test(object sender, ClickEventArgs e)
    {
        DayClick(this, new ClickEventArgs(sender as Day));
    }
}

这是XAML

 <Calen:Cal x:Name="Calendar" Margin="0,50,0,0" DayChanged="Calendar_DayChanged" DayClick="Calendar_DayClick"/>

我不知道错误在哪里或知道如何解决它。

Answer 1

您可以通过两种不同的方式实现WPF TextBox控件（例如TextBox1）事件订阅，如下面的示例代码片段所示：

使用C＃Lambda-expression（最短代码语法）：

TextBox1.PreviewKeyDown += (s, e) => { //YOUR CODE};

更传统的方式（更长的语法）：

TextBox1.PreviewMouseDown += (s, e) => TextBox_PreviewMouseDown(s, e);
private void TextBox_PreviewMouseDown(object sender, RoutedEventArgs e)
{
        try
        {
           TextBox _tb = sender as TextBox;
          // THE REST OF YOUR CODE
        }
        catch { }
}

与WPF TextBox相关的有用事件订阅示例：

TextBox1.TextChanged += (s, e) => { // YOUR CODE };

希望这可能会有所帮助。亲切的问候，

单击文本框上的事件

1 个答案: