如何将DependencyProperty添加到WInForms UserControl以在WPF中进行绑定

Question

我跟着this guide将WinForms Windows媒体播放器导入WPF。

我现在想要在我的WPF应用程序中绑定控件的URL属性。但是，当我尝试这样做时，我得到一个错误，因为控件不从DependencyObject类继承。

我尝试将URL注册为DependencyProperty，如下所示：

partial class WMPControl
{
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Component Designer generated code

    /// <summary>
    /// Required method for Designer support - do not modify 
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(WMPControl));
        this.axWindowsMediaPlayer1 = new AxWMPLib.AxWindowsMediaPlayer();
        ((System.ComponentModel.ISupportInitialize)(this.axWindowsMediaPlayer1)).BeginInit();
        this.SuspendLayout();
        // 
        // axWindowsMediaPlayer1
        // 
        this.axWindowsMediaPlayer1.Dock = System.Windows.Forms.DockStyle.Fill;
        this.axWindowsMediaPlayer1.Enabled = true;
        this.axWindowsMediaPlayer1.Location = new System.Drawing.Point(0, 0);
        this.axWindowsMediaPlayer1.Name = "axWindowsMediaPlayer1";
        this.axWindowsMediaPlayer1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axWindowsMediaPlayer1.OcxState")));
        this.axWindowsMediaPlayer1.Size = new System.Drawing.Size(634, 437);
        this.axWindowsMediaPlayer1.TabIndex = 0;
        // 
        // UserControl1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.Controls.Add(this.axWindowsMediaPlayer1);
        this.Name = "UserControl1";
        this.Size = new System.Drawing.Size(634, 437);
        ((System.ComponentModel.ISupportInitialize)(this.axWindowsMediaPlayer1)).EndInit();
        this.ResumeLayout(false);

    }

    #endregion

    public static readonly DependencyProperty MyCustomProperty =
    DependencyProperty.Register("URL", typeof(string), typeof(AxWMPLib.AxWindowsMediaPlayer));


    private AxWMPLib.AxWindowsMediaPlayer axWindowsMediaPlayer1;
}

但是从WPF我得到了：A＆＃39; Binding＆＃39;不能在＆＃39; URL＆＃39;上设置类型＆＃39; AxWindowsMediaPlayer＆＃39;的属性。 A＆＃39;绑定＆＃39;只能在DependencyObject的DependencyProperty上设置。