用户控件继承子 UserControl 。

现在有个业务需求在UserControl 所在的窗体关闭时解除事件HMouseDown绑定。

因没有相关的Close事件。后来本人想了一个办法在  ROICtlDesigner类的 Dispose 方法中执行相关的释放代码  比如解除事件绑定 释放资源

public partial class ROICtl : UserControl
{   private IWindowDisplay window;public IWindowDisplay WindowDisplay{get { return window; }set{window = value;BindingEvents();}}void BindingEvents(){if (window != null){window.HMouseDown += WindowDisplay_HMouseDown;}}private void WindowDisplay_HMouseDown(object sender, HMouseEventArgs e){try{if (!IsPress && e.Button == MouseButtons.Middle){IsPress = true;}}catch (Exception){ }                }
}

    partial class ROICtl{/// <summary> /// 必需的设计器变量。/// </summary>private System.ComponentModel.IContainer components = null;/// <summary> /// 清理所有正在使用的资源。/// </summary>/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>protected override void Dispose(bool disposing){if (disposing && (components != null)){components.Dispose();}if (window != null){window.HMouseDown -= WindowDisplay_HMouseDown;}base.Dispose(disposing);}}