Question

我已经在winform中实现了一个wpf组合框，现在必须以某种方式让它在更改框时调用winform中的函数或事件，并且能够从winform中更改值。

主：

namespace main
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            ElementHost elhost = new ElementHost();
            elhost.Size = new Size(174, 24);
            elhost.Location = new Point(93,60);
            MyWPFControl wpfctl = new MyWPFControl();
            elhost.Child = wpfctl;
            this.Controls.Add(elhost);
            elhost.BringToFront();
        }


        public void status_change(int val)
        {
            MessageBox.Show("Box value has changed to:" + Convert.ToString(val)   );
        }

和wpf：

namespace main
{
    /// <summary>
    /// Interaction logic for MyWPFControl.xaml
    /// </summary>
    public partial class MyWPFControl : UserControl
    {
        public MyWPFControl()
        {
            InitializeComponent();

        }


        private void statComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            main.status_change(statComboBox.SelectedIndex);
            /// says:
            /// Error   1   The type or namespace name 'status_change' does not exist in the namespace 'main' (are you missing an assembly reference?)  C:\Users\Robert\documents\visual studio 2010\Projects\XMPP\main\wpf_combo_status.xaml.cs    31  18  main

        }


    }
    }

任何想法我可能做错了什么？谢谢！

Answer 1

没有更多的上下文很难说，但似乎你想要的代码可能是：

private void statComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    main.status_change(statComboBox.SelectedIndex);
}

假设main是您要呼叫Form1的{{1}}个实例。

Answer 2

在MyWPFControl中公开一个事件，如：

public SelectionChangedEventArgs:EventArgs
{
    public int SelectedIndex {get; private set;}
    public SelectionChangedEventArgs (int selIdx)
    {
        this.SelectedIndex = selIdx;
    }
}

public partial class MyWPFControl : UserControl
{
    public event EventHandler<SelectionChangedEventArgs> SelectionChanged;

    public MyWPFControl()
    {
        InitializeComponent();
    }

    private void statComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        OnSelectionChanged(statComboBox.SelectedIndex);
    }

    private void OnSelectionChanged(int selIdx)
    {
        if (SelectionChange != null)
            SelectionChanged(this, new SelectionChangedEventArgs(selIdx));
    }
}

然后在您的表单中订阅，例如：

public Form1()
{
    InitializeComponent();

    ElementHost elhost = new ElementHost();
    elhost.Size = new Size(174, 24);
    elhost.Location = new Point(93,60);
    MyWPFControl wpfctl = new MyWPFControl();
    elhost.Child = wpfctl;
    this.Controls.Add(elhost);
    elhost.BringToFront();

    wpfctl.SelectionChanged += myWPFControls_SelectionChanged;
}

private void myWPFControls_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    status_change(e.SelectedIndex);
}

<强> P.S：

我无法测试它，所以可能会有一些错误，但只是为了给你一个想法...;）

我可以在winform中从WPF组合框中捕获事件吗？

2 个答案: