.Net 中XML配置系统快捷键

本例支持单键和组合键,不过注册的是操作系统的全局快捷键,这点需要注意,在代码中要做屏蔽处理

先建一个快捷键的工具类

    public class HotKey
    {
        //定义了辅助键的名称（将数字转变为字符以便于记忆，也可去除此枚举而直接使用数值）
        [Flags]
        public enum KeyModifiers
        {
            None = 0,Alt = 1,Ctrl = 2,Shift = 4,WindowsKey = 8
        }

        //如果函数执行成功，返回值不为0。
        //如果函数执行失败，返回值为0。要得到扩展错误信息，调用GetLastError。
        [DllImport("user32.dll",SetLastError = true)]
        public static extern bool RegisterHotKey(
            IntPtr hWnd,//要定义热键的窗口的句柄
            int id,//定义热键ID（不能与其它ID重复）           
            KeyModifiers fsModifiers,//标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效
            Keys vk //定义热键的内容
            );

        [DllImport("user32.dll",SetLastError = true)]
        public static extern bool UnregisterHotKey(
            IntPtr hWnd,//要取消热键的窗口的句柄
            int id //要取消热键的ID
            );
    }

快捷键配置类似下面这样

        <HotKey Keys =" Ctrl+D1" Code ="100">
          <CallMethod Name ="GisSelect" />
        </HotKey>
        <HotKey Keys ="F2" Code ="101">
          <CallMethod Name ="GisZoomIn" />
        </HotKey>
        <HotKey Keys ="F3" Code ="102">
          <CallMethod Name ="GisZoomOut" />
        </HotKey>
        <HotKey Keys ="Ctrl + D0" Code ="103">
          <CallMethod Name ="GisReset" />
        </HotKey>

CallMethod为反射调用的方法

下面代码对以上XML配置节进行读取并注册快捷键

                var hotKeys = ToolStripConfig.FindHotKeys(compositeView.SmartPartsName,compositeView.SmartParts[0].ToString());
                if (hotKeys != null)
                {
                    var keyModifiersFields = typeof(HotKey.KeyModifiers).GetFields(BindingFlags.Static | BindingFlags.Public);
                    var keys = typeof(Keys).GetFields(BindingFlags.Static | BindingFlags.Public);

                    foreach (XElement hotKey in hotKeys)
                    {
                        var keyNameList = new List<string>();
                        hotKey.Attribute("Keys").Value.Split('+').ToList().ForEach(item => keyNameList.Add(item.Trim()));

                        //处理KeyModifiers
                        var keyModifiersFieldsValueList =
                            (from fi in keyModifiersFields
                             where keyNameList.Contains(fi.Name)
                             select (HotKey.KeyModifiers)fi.GetValue(null)).ToList();
                        //处理Keys
                        var keysValueList =
                            (from fi in keys
                             where keyNameList.Contains(fi.Name)
                             select (Keys)fi.GetValue(null)).ToList();

                        //组合键
                        if (keyNameList.Count > 1)
                        {
                            //注册快捷键
                            if (keyModifiersFieldsValueList.Count > 1)
                                HotKey.RegisterHotKey(Handle,int.Parse(hotKey.Attribute("Code").Value),keyModifiersFieldsValueList[0] | keyModifiersFieldsValueList[1],keysValueList[0]);
                            else
                                HotKey.RegisterHotKey(Handle,keyModifiersFieldsValueList[0],keysValueList[0]);
                        }
                        //单键
                        else
                        {
                            //注册快捷键
                            HotKey.RegisterHotKey(Handle,keysValueList[0]);
                        }
                    }
                }

接着在窗体代码中对windows消息进行拦截,对键盘按键进行捕捉,读取配置文件,反射执行对应的配置方法

        protected override void WndProc(ref Message m)
        {
            var compositeView =
                _presenter.WorkItem.RootWorkItem.Workspaces[XSWorkSpaceConst.CONTENTWORKSPACE].ActiveSmartPart
                    as CompSmartPartZoneView;

            if (compositeView != null && compositeView.SmartParts.Count > 0 && Equals(compositeView.SmartParts[0] as XSView))
            {
                //只有当前窗口是系统窗口,快捷键才响应
                var findWindow = Control.FromHandle(GetForegroundWindow());
                if (findWindow != null && findWindow.GetType().Name == "XSShellMainForm")
                {
                    //快捷键响应,反射调用配置的方法
                    var hotKeys = ToolStripConfig.FindHotKeys(compositeView.SmartPartsName,compositeView.SmartParts[0].ToString());
                    if (hotKeys != null)
                    {
                        foreach (XElement hotKey in hotKeys)
                        {
                            if (m.WParam.ToInt32() == int.Parse(hotKey.Attribute("Code").Value))
                            {
                                Type t = compositeView.SmartParts[0].GetType();
                                RunSmartConfig.CallMethods(compositeView.SmartParts[0],t,hotKey.Elements("CallMethod"));
                            }
                        }
                    }
                }
            }

            base.WndProc(ref m);
        }

以上的 XSShellMainForm为当前主窗体的Type类型名称

最后在关闭窗体的时候,还要注销这个快捷键,这个过程同样要读取XML

            var hotKeys = ToolStripConfig.FindHotKeys(compositeView.SmartPartsName,compositeView.SmartParts[0].ToString());
            if (hotKeys != null)
            {
                foreach (XElement hotKey in hotKeys)
                {
                    HotKey.UnregisterHotKey(Handle,int.Parse(hotKey.Attribute("Code").Value));
                }
            }