ch9_demoform002.cs

章立民－visual stadio 2005 c＃编程技巧

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Runtime.InteropServices;
using CH9.Properties;

namespace CH9
{
    public partial class CH9_DemoForm002 : Form
    {
        public CH9_DemoForm002()
        {
            InitializeComponent();
        }

        [DllImport("shdocvw.dll")]
        private static extern int DoOrganizeFavDlg
        (
            // 原本的[long hWnd]使用[IntPtr hWnd]取代。
            IntPtr hWnd,
            string lpszRootFolder
        );

        private const int myBUFFER = 20;

        private void CH9_DemoForm002_Load(object sender, EventArgs e)
        {
            // 呼叫 GoHome 方法来导览至首页。
            this.webBrowser1.GoHome();

            // 更新「上一页」与「下一页」按钮。
            UpdateButtons();

            this.InitializeOpenFileDialog();

            // 取得我的最爱系统数据夹路径。
            DirectoryInfo myFavDir = new DirectoryInfo(Environment.GetFolderPath(Environment.SpecialFolder.Favorites));

            RefreshDir(myFavDir);
        }

        private void tsmiClose_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void backButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.GoBack();
        }

        private void forwardButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.GoForward();
        }

        private void stopButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.Stop();
        }

        private void refreshButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.Refresh();
        }

        private void homeButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.GoHome();
        }

        private void searchButton_Click(object sender, EventArgs e)
        {
            this.webBrowser1.GoSearch();
        }

        // 「移至」按钮的Click事件处理例程。
        private void tsbGo_Click(object sender, EventArgs e)
        {
            this.NavigateToURL();
        }

        private void urlTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            // 按下 Enter 键便会导览至所键入的 URL。
            if (e.KeyCode == Keys.Enter)
            {
                this.NavigateToURL();
            }
        }

        private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
            // 更新「上一页」与「下一页」按钮。
            UpdateButtons();

            this.tsWebProgressBar.Visible = true;
        }

        private void webBrowser1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
        {
            // 更新「上一页」与「下一页」按钮。
            UpdateButtons();

            // 更新 URL 文字方块。
            this.urlTextBox.Text = this.webBrowser1.Url.ToString();

            // 更新文字。
            this.statusText.Text = "正在打开网页 " + this.webBrowser1.Url.ToString();
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            this.statusText.Text = "完成";
            this.UpLevelButton.Enabled = canGoUp(formatPath(this.urlTextBox.Text));
            this.tsWebProgressBar.Visible = false;
            this.tsWebProgressBar.Value = 0;
        }

        private void NavigateToURL()
        {
            try
            {
                this.webBrowser1.Navigate(formatPath(this.urlTextBox.Text));
            }
            catch
            {
                MessageBox.Show("无效的 URL。", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private string formatPath(string myPath)
        {
            string trimmed = myPath.Trim();

            if (trimmed.StartsWith("file:"))
            {
                trimmed = trimmed.Replace(@"file:///", "");
                trimmed = trimmed.Replace("file://", "\\");
                trimmed = trimmed.Replace("/", @"\");
            }

            return trimmed;
        }

        private void UpLevelButton_Click(object sender, EventArgs e)
        {
            string myPath = formatPath(this.webBrowser1.Url.ToString());

            if (canGoUp(myPath))
            {
                myPath = myPath.Substring(0, myPath.LastIndexOf(@"\"));

                try
                {
                    this.webBrowser1.Navigate(myPath);
                }
                catch
                {
                    UpLevelButton.Enabled = false;
                }
            }
        }

        private bool canGoUp(string myPath)
        {
            myPath = myPath.TrimStart(@"\".ToCharArray());
            myPath += @"\";
            return (!(myPath.IndexOf(@"\") == myPath.LastIndexOf(@"\")) && !((myPath.IndexOf(@"\") + 1) == myPath.LastIndexOf(@"\")));
        }

        private void UpdateButtons()
        {
            // 更新「上一页」与「下一页」按钮。
            this.backButton.Enabled = this.webBrowser1.CanGoBack;
            this.forwardButton.Enabled = this.webBrowser1.CanGoForward;
        }

        private void tsmiOpen_Click(object sender, EventArgs e)
        {
            try
            {
                if (OpenFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    this.webBrowser1.Navigate(OpenFileDialog1.FileName);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        // 本程序用来设定「开启档案」对话框的各项属性。 
        private void InitializeOpenFileDialog()
        {
            // 设定「开启档案」对话框的初始目录。
            OpenFileDialog1.InitialDirectory = Environment.CurrentDirectory + @"\HTML";

            // 设定文件名筛选字符串以方便选取特定格式的档案。
            OpenFileDialog1.Filter =
             "网页 (*.HTM;*.HTML)|*.HTM;*.HTML|XML 文件(*.XML)|*.XML|Flash 文件(*.SWF)|*.SWF|Office 文件(*.DOC;*.XLS;*.PPT)|*.DOC;*.XLS;*.PPT";

            // 设定「开启档案」对话框的标题。
            OpenFileDialog1.Title = "请选取特定格式文件";

            // 设定「开启档案」对话框在关闭前还原目前的目录。
            OpenFileDialog1.RestoreDirectory = true;
        }

        private void webBrowser1_ProgressChanged(object sender, WebBrowserProgressChangedEventArgs e)
        {
            this.tsWebProgressBar.Value = (int)(((float)e.CurrentProgress / (float)e.MaximumProgress) * 100);
        }

        private void BrowserToolStrip_Resize(object sender, EventArgs e)
        {