83 wpf 转向输入的url

最新推荐文章于 2024-07-18 11:27:08 发布

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最新推荐文章于 2024-07-18 11:27:08 发布

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分类专栏： wpf程序设计指南文章标签： wpf WPF

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这是一个WPF应用程序，用于导航到用户输入的URL。程序启动后，会显示一个对话框让用户输入URL，然后在窗口中加载指定的网页。如果输入的URL无效，程序将显示错误消息。

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
using System.Windows.Media;

namespace WpfApplication1
{
    public class NavigateTheWeb : Window {
        Frame frm;
        [STAThread]
        public static void Main()
        {
            Application app = new Application();
            app.Run(new NavigateTheWeb());
        }
        public NavigateTheWeb()
        {
            Title = "Navigate the Web";
            frm = new Frame();
            Content = frm;
            Loaded+= OnWindowsLoaded;
        }
        void OnWindowsLoaded(object sender,RoutedEventArgs args)
        {
            UriDialog dlg = new UriDialog();
            dlg.Owner = this;
            dlg.Text = "http://";
            dlg.ShowDialog();
            try {
                frm.Source = new Uri(dlg.Text);
            }
            catch(Exception exc){
                MessageBox.Show(exc.Message,Title);
            }
        }
    }
    public class UriDialog : Window
    {
        TextBox txtbox;
        public UriDialog() {
            Title = " enter a uri";
            ShowInTaskbar = false;
            SizeToContent = SizeToContent.WidthAndHeight;
            WindowStyle = WindowStyle.ToolWindow;
            WindowStartupLocation = WindowStartupLocation.CenterOwner;

            txtbox = new TextBox();
            txtbox.Margin = new Thickness(48);
            Content = txtbox;
            txtbox.Focus();
        }
        public string Text {
            set {
                txtbox.Text = value;
                txtbox.SelectionStart = txtbox.Text.Length;

            }
            get {
                return txtbox.Text;
            }
        }
        protected override void OnKeyDown(KeyEventArgs e)
        {
        if (e.Key==Key.Enter)
        {
            Close();
        }
        }
    }
}