Question

我有一个带有ScrollViewer的WPF应用程序（窗口1）。我有一个第二个窗口，它是同一个WPF应用程序的一部分，上面有一个按钮。

当我单击第二个窗口上的按钮时，我希望它在第一个窗口中将项目添加到ScrollViewer。

我怎样才能做到这一点？对不起，如果这是模糊的，我不知道如何提出这个问题。

Answer 1

首先，您需要DispatcherTimer，而且必须使用StackPanel代替Grid。您还需要在public static bool上声明Window1。然后，当点击Window2上的按钮时，bool设置为True，这意味着执行一个空格，将对象添加到StackPanel或{{ 1}}

XAML

^{的 Window1.xaml}

首先，您需要将Scroll Viewer更改为Grid。假设您的StackPanel名称为ScrollViewer，scrollViewer1，则应尝试以下内容

更改以下内容

Margin = "37,36,58,36"

到

<Grid> <ScrollViewer Margin="37,36,58,36" Name="scrollViewer1" /> </Grid>

这样您就可以使用<StackPanel x:Name="stackPanel"> <ScrollViewer Margin="37,36,58,36" Name="scrollViewer1" /> </StackPanel>代替StackPanel名称Grid

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^{的 Window1.xaml}

stackPanel

^{的 Window2.xaml}

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace WpfApplication1 { /// <summary> /// Interaction logic for Window1.xaml /// </summary> public partial class Window1 : Window { public static bool AddItem = false; //This must be public and static so that it can be called from your second Window public Window1() { InitializeComponent(); } public void AddToScrollViewer() { Button _Object = new Button(); //Create a new object, change button to the UIElement you would like to be stackPanel.Children.Add(_Object); //Add the UIElement to the StackPanel } private void Window_Loaded(object sender, RoutedEventArgs e) { System.Windows.Threading.DispatcherTimer dispatcherTimer = new System.Windows.Threading.DispatcherTimer(); //Initialize a new timer object dispatcherTimer.Tick += new EventHandler(dispatcherTimer_Tick); //Link the Tick event with dispatcherTimer_Tick dispatcherTimer.Interval = new TimeSpan(0, 0, 1); //Set the Timer Interval dispatcherTimer.Start(); //Start the Timer } private void dispatcherTimer_Tick(object sender, EventArgs e) { if (AddItem) { AddItem = false; AddToScrollViewer(); } } } }

谢谢，我希望你觉得这很有帮助：）

Answer 2

执行此操作的正确方法是让您的第二个表单有一个custom Event，将信息传递给您的MainWindow。

这是概念的快速证明，看看它是否适合您。

<强> MainWindow.xaml.cs
滚动查看器中的1个scrollviewer 1 stackpanel和1个按钮：

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        Window2 secondWindow;
        public MainWindow()
        {
            InitializeComponent();

        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            secondWindow = new Window2();
            secondWindow.RaiseCustomEvent += new Window2.myCustomEventHandler(secondWindow_RaiseCustomEvent);
            secondWindow.ShowDialog();
        }

        void secondWindow_RaiseCustomEvent(object sender, myCustomEventArgs e)
        {
            Label lbl= new Label();
            lbl.Content = string.Copy(e.retrieveString);
            ((StackPanel)scrollViewer1.Content).Children.Add(lbl);
        }
    }
}

<强> Window2.xaml.cs
1个按钮

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window2.xaml
    /// </summary>

   public partial class Window2 : Window
   {
        public delegate void myCustomEventHandler(object sender, myCustomEventArgs e);
        public event myCustomEventHandler RaiseCustomEvent;
        String myStatement = "Hello World";
        public Window2()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            myCustomEventArgs ea = new myCustomEventArgs( myStatement);
            RaiseCustomEvent(sender, ea);

        }
    }

    public class myCustomEventArgs : EventArgs
    {
        public myCustomEventArgs(string s)
        {
            myString = s;
        }
        private string myString;
        public string retrieveString
        {
            get { return myString; }
        }
    }
}

按钮单击事件以影响不同的窗口

2 个答案:

XAML

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