一个关于toolbar的问题

[voodoo82]

一个Form窗口，里面有一个ToolStrip控件，ToolStrip里面再添加一个button。

程序运行的时候，使另一个程序窗口为最前，这样Form失去焦点，然后点击ToolStrip中的button，只能使Form为最前，而button的click事件没有被引发。所以只能点击两次才能触发button的click事件。

而在Form为非最前时，点击Form窗体中的button，或者点击窗体右上角的关闭按钮，则一次点击就可以把Form送至最前并引发Click事件。

这个现象很奇怪，有人知道怎么解决吗？谢谢了。

[voodoo82]

我没有任何加任何代码，只是拖些空间到窗体，然后加个Click函数

请看清楚我的条件，是窗口在后台，然后点击ToolBar里按钮，这时不能触发Click事件，只能让窗口跳到前台。

而窗体上的按钮，就可以直接让窗口跳前台，并且出发Click事件

[voodoo82]

在网上搜索了一下，找到了结果，结贴了。

解决方法如下：从ToolStrip派生类，重载WndProc函数，处理WM_MOUSEACTIVE消息。具体可见下面的代码

    /// <summary>
    /// This class is derived from ToolStrip. It is used to fix the problem that
    /// buttons in toolstrip can't get Click event if user click them when the form
    /// is not focused.
    /// </summary>
    class ToolStripEx 
        : ToolStrip
    {
        private const uint WM_MOUSEACTIVATE = 0x21;
        private const uint MA_ACTIVATE = 1;
        private const uint MA_ACTIVATEANDEAT = 2;
        private const uint MA_NOACTIVATE = 3;
        private const uint MA_NOACTIVATEANDEAT = 4;

        /// <summary>
        /// This field is used to control whether buttons in ToolStrip get Click event 
        /// when the form is not focused.
        /// 
        /// Type : System.Boolean
        /// 
        /// false is the same behavior provided by the base ToolStrip class
        /// true is that buttons can get Click event even the form is not focused
        /// Default value is false
        /// </summary>
        private bool _clickThrough = false;

        /// <summary>
        /// This property is used to control whether buttons in ToolStrip get Click event 
        /// when the form is not focused.
        /// 
        /// Type : System.Boolean
        /// 
        /// false is the same behavior provided by the base ToolStrip class
        /// true is that buttons can get Click event even the form is not focused
        /// Default value is false
        /// </summary>
        public bool ClickThrough
        {
            get { return _clickThrough; }
            set { _clickThrough = value; }
        }

        protected override void WndProc(ref Message m)
        {
            base.WndProc(ref m);

            if (_clickThrough && 
                m.Msg == WM_MOUSEACTIVATE &&
                m.Result == (IntPtr)MA_ACTIVATEANDEAT)
            {
                m.Result = (IntPtr)MA_ACTIVATE;
            }
        }
    }

[熙风]

友情帮顶······

[lonyjianhui]

具体情况具体分析，LZ肯定代码有错，点击两次才能触发button的click事件这种情况是没可能出现的，除非Click事件是你自己写的，看看Click事件里你自己有没有加控制变量吧，或者发代码看看