onlinehelp.cs

微软的行业应用解决方案示例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using System.IO;
using HardwareDistributor.Properties;

namespace HardwareDistributor.UI
{
	public partial class OnlineHelp : Form
	{
		private string _fileName;
		private bool _clicked = false;
        private static string helpFolder = "Help";

		public OnlineHelp(string fileName)
		{
			InitializeComponent();

			// We are removing both the Control Box and the Minimize Box, so that we don't
			// have to handle these in our code. This is not necessary in Windows Mobile Standard,
			// but we are writing this code so that it works on all platforms without any changes
			// or any recompiling.
			this.ControlBox = false;
			this.MinimizeBox = false;

            //get the localized help path

            _fileName = GetLocalizedHelpfile( fileName);
		}

        /// <summary>
        /// Tries to find a localized help file. If it cannot, it simply uses the one in the default help folder
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        private static string GetLocalizedHelpfile(string fileName)
        {
            string defaultHelpFolder = null;
            StringBuilder helpFilePath = new StringBuilder();
            helpFilePath.Append(Business.GlobalCache.Instance.AppPath);
            helpFilePath.Append(helpFolder);

            //hold on to the default folder
            defaultHelpFolder = helpFilePath.ToString();

            //now tag on the localized path
            helpFilePath.Append("\\");
            helpFilePath.Append(CultureInfo.CurrentUICulture.Name);
            helpFilePath.Append("\\");
			helpFilePath.Append(fileName + "-" + CultureInfo.CurrentUICulture.Name + ".htm");

            string localizedHelpFile = helpFilePath.ToString();
			string defaultHelpFile = defaultHelpFolder + "\\" + fileName + ".htm";


            //send localized filepath IF it exists
            return (File.Exists(localizedHelpFile)) ? localizedHelpFile : defaultHelpFile;
        }

		/// <summary>
		/// Dismiss the dialog (soft key is clicked)
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void menuItemDismiss_Click(object sender, EventArgs e)
		{
			if (!_clicked)
			{
				_clicked = true;
				this.Close();
			}
		}

		/// <summary>
		/// Custom Handling for the back key
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void OnlineHelp_KeyDown(object sender, KeyEventArgs e)
		{				
			if ((e.KeyCode == System.Windows.Forms.Keys.Back))
			{
				// Back

				// if the back key is hit, and the dialog is not already closing, close it now
				if (!_clicked)
				{
					_clicked = true;
					this.Close();
				}
			}
		}

		/// <summary>
		/// Load the Online Help Dialog
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		private void OnlineHelp_Load(object sender, EventArgs e)
		{
			try
			{
				TextReader reader = new StreamReader(_fileName);
				//text.Text = reader.ReadToEnd();
				webBrowser.DocumentText = reader.ReadToEnd();
			}
			catch (Exception ex)
			{
				Business.Services.LogErrors(ex);
				MessageBox.Show(Resources.HelpDisplayError, Resources.SystemError);
			}
		}
	}
}