NeoFT/Controls/UrlLinkLabel.cs

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Windows.Forms;
using System.IO;
using Microsoft.Win32;

namespace nft.controls
{
        /// <summary>
        /// LinkLabel control that launchs a browser and
        /// navigates to a specified URL.
        /// </summary>
        public class UrlLinkLabel : LinkLabel
        {
                private string targetUrl;

                [
                        Description("URL to be opened")
                ]
                public string TargetUrl {
                        get { return targetUrl; }
                        set { targetUrl=value; }
                }

                public UrlLinkLabel() {}

                protected override void OnLinkClicked(LinkLabelLinkClickedEventArgs e) {
                        base.OnLinkClicked(e);
                        
                        // Because shell execuse doesn't work
                        // we have to specify executing module directory
                        ProcessStartInfo info = new ProcessStartInfo();
                        // get default browser (exe) path
                        RegistryKey rkey = Registry.ClassesRoot.OpenSubKey(@"http\shell\open\command");
                        String val = rkey.GetValue("").ToString();
                        Debug.WriteLine(val);
                        if(val.StartsWith("\""))
                        {
                                int n = val.IndexOf("\"",1);
                                info.FileName = val.Substring(1,n-1);
                                info.Arguments = val.Substring(n+1);
                        }
                        else
                        {
                                string[] a = val.Split(new char[]{' '});
                                info.FileName = a[0];
                                info.Arguments = val.Substring(a[0].Length+1);
                        }
                        // Specifies working directory is necessary to run browser successfuly.
                        info.WorkingDirectory = Path.GetDirectoryName(info.FileName);
                        
                        info.Arguments += targetUrl;
                        Debug.WriteLine(info.FileName);
                        Debug.WriteLine(info.WorkingDirectory);
                        Debug.WriteLine(info.Arguments);
                        System.Diagnostics.Process.Start(info);

                        // Following code doesn't work. I don't know why...
                        //System.Diagnostics.Process.Start(targetUrl);
                }
        }
}