Introduce ability to make quick backups

src/DataButler/Backup.cs

@@ -0,0 +1,88 @@
+using System;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Drawing;
+using System.Linq;
+using System.Windows.Forms;
+using DataButler.Utilities;
+
+namespace DataButler
+{
+    public partial class Backup : Form
+    {
+        readonly BackgroundWorker _backgroundWorker = new BackgroundWorker { WorkerReportsProgress = true };
+        public Backup()
+        {
+            InitializeComponent();
+            lnkVersion.Text = Application.ProductVersion;
+            _backgroundWorker.DoWork += BackgroundWorkerOnDoWork;
+            _backgroundWorker.RunWorkerCompleted += BackgroundWorkerOnRunWorkerCompleted;
+            _backgroundWorker.ProgressChanged += ProgressReported;
+            btnBackup.Enabled = false;
+            string failure;
+
+            var databases = Database.GetDatabases(out failure);
+            if (databases.Any())
+            {
+                cbDatabase.Items.AddRange(databases);
+                return;
+            }
+
+            LogMessage(failure);
+            txtLog.Visible = true;
+        }
+
+        void ProgressReported(object sender, ProgressChangedEventArgs e)
+        {
+            var userState = e.UserState.ToString();
+            LogMessage(userState);
+        }
+
+        void LogMessage(string msg)
+        {
+            txtLog.AppendText(string.Format("{0}{1}", msg, Environment.NewLine));
+            txtLog.ScrollToCaret();
+        }
+
+        private void BackupClicked(object sender, EventArgs e)
+        {
+            txtLog.BackColor = SystemColors.Window;
+            txtLog.ForeColor = SystemColors.WindowText;
+            txtLog.Visible = true;
+            txtLog.Clear();
+            Cursor = Cursors.WaitCursor;
+            btnBackup.Enabled = cbDatabase.Enabled = false;
+            WaitImage.Visible = true;
+            _backgroundWorker.RunWorkerAsync(cbDatabase.SelectedItem as SqlDatabase);
+        }
+
+        private void BackgroundWorkerOnDoWork(object sender, DoWorkEventArgs e)
+        {
+            var database = e.Argument as SqlDatabase;
+            e.Result = Database.Backup(database, _backgroundWorker);
+        }
+
+        private void BackgroundWorkerOnRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
+        {
+            Cursor = Cursors.Default;
+            var result = e.Result as string;
+            var success = txtLog.Text.Contains("BACKUP DATABASE successfully") &&
+                          txtLog.Text.Contains(string.Format("The backup set on file {0} is valid.", result));
+            txtLog.BackColor = success ? Color.MediumSpringGreen : Color.DarkRed;
+            txtLog.ForeColor = success ? Color.Black : Color.Yellow;
+            var message = success ? "Backup SUCCESSFULLY COMPLETE." : "Backup FAILED!";
+            LogMessage(message);
+            btnBackup.Enabled = true;
+        }
+
+        private void VersionLinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
+        {
+            Process.Start("https://github.com/minton/DataButler");
+        }
+
+        private void DatabaseSelected(object sender, EventArgs e)
+        {
+            btnBackup.Enabled = cbDatabase.SelectedItem != null;
+        }
+    }
+}