statusmessagewindow.cs

微软的行业应用解决方案示例

using Launcher.Properties;
using Microsoft.WindowsCE.Forms;

namespace Launcher
{
    /// <summary>
    /// Derive's from MessageWindow class to process
    /// custom Windows messages 
    /// </summary>
    public class StatusMessageWindow : MessageWindow
    {

        #region Fields & Constants

        // Assign integers to messages.
        // Note that custom Window messages are after WM_USER = 0x400.
        private const int WM_STATUSUPDATE = 0x0401;
        private const int WM_ERROR = 0x0402;
        private const int WM_DONE = 0x0403;


        // Holds the instance of our splash screen to be updated
        private SplashScreen splashScreen;

        #endregion

        #region Constructors

        /// <summary>
        /// Initialize
        /// </summary>
        /// <param name="splashScreen">pointer to the Parent Splash Form</param>
        /// <param name="windowName">Name to be assigned to this message window. This name is used by ot
        /// other processes for IPC</param>
        public StatusMessageWindow(SplashScreen splashScreen, string windowName)
        {
            //hold reference to the splash screen
            this.splashScreen = splashScreen;

            //assign the window name to be used to find this window by the main application
            this.Text = windowName;

            //set the initial status
            splashScreen.UpdateStatus( Resources.ResourceManager.GetString("InitialStatus") );
        }

        #endregion

        #region MessageWindow overriden methods

        /// <summary>
        /// Override the default WndProc behavior to examine messages.
        /// </summary>
        /// <param name="msg">recevied message</param>
        protected override void WndProc(ref Message msg)
        {
            //custom processing for known message codes
            switch ( msg.Msg )
            {
                case (WM_STATUSUPDATE):
                    {
                        //update the status text in the parent splash screen
                        this.splashScreen.UpdateStatus(
                                Resources.ResourceManager.GetString(
                                    MessageCodes.Instance.ResourceKey[msg.WParam.ToInt32()])
                                    );
                        break;
                    }
                case WM_ERROR:
                    {
                        //update the status text in the parent splash screen
                        this.splashScreen.UpdateStatus(
                                Resources.ResourceManager.GetString(
                                    MessageCodes.Instance.ResourceKey[msg.WParam.ToInt32()])
                                    );

                        //give the user time to read the message
                        System.Threading.Thread.Sleep(1000);

                        //inform the user that we are shutting down
                        this.splashScreen.UpdateStatus(
                                Resources.ResourceManager.GetString("ShuttingDown")
                                    );

                        //shut down the splash screen
                        splashScreen.Shutdown();

                        break;
                    }
                case WM_DONE:
                    {
                        splashScreen.Shutdown();
                    }
                    break;
            }


            // Call the base class WndProc for default message handling.
            base.WndProc(ref msg);
        }

        #endregion

    }
}