Improved error handling

MusicOrganizer/MainForm.Designer.cs

@@ -59,6 +59,7 @@
             this.button2.TabIndex = 1;
             this.button2.Text = "Create BPM folder structure";
             this.button2.UseVisualStyleBackColor = true;
+            this.button2.Click += new System.EventHandler(this.button2_Click);
             // 
             // button1
             // 
@@ -91,7 +92,7 @@
             // 
             // columnFilename
             // 
-            this.columnFilename.AspectName = "filename";
+            this.columnFilename.AspectName = "relativeFilename";
             this.columnFilename.Text = "Filename";
             // 
             // columnArtist

MusicOrganizer/MainForm.cs

@@ -7,16 +7,26 @@ namespace MusicOrganizer
 {
     public partial class MainForm : Form
     {
+        struct Item
+        {
+            public string filename;
+            public string relativeFilename;
+            public string artist;
+            public string title;
+            public string bpm;
+        }
+
+        private List<Item> items;
+
         public MainForm()
         {
             InitializeComponent();
 
             objectListView1.AlwaysGroupByColumn = columnBpm;
+            items = new List<Item>();
         }
 
         private void button1_Click(object sender, EventArgs e)
-        {
-            try
         {
             string musicFolder;
 
@@ -36,13 +46,48 @@ namespace MusicOrganizer
             if (!musicFolder.EndsWith("\\") && !musicFolder.EndsWith("/"))
                 musicFolder += Path.DirectorySeparatorChar;
 
-                var paths = Directory.GetFileSystemEntries(musicFolder, "*.mp3", SearchOption.AllDirectories);
+            string[] paths;
 
-                var objects = new List<object>();
+            again1:
+            try
+            {
+                paths = Directory.GetFileSystemEntries(musicFolder, "*.mp3", SearchOption.AllDirectories);
+            }
+            catch(Exception ex)
+            {
+                var result = MessageBox.Show(string.Format("Error occured when collecting files\n\n{0}", ex.Message), "Error occured", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error);
+
+                switch(result)
+                {
+                    case DialogResult.Retry: goto again1;
+                    case DialogResult.Cancel: return;
+                    default: throw new Exception("Unknown option clicked.");
+                }
+            }
+
+            var newItems = new List<Item>();
 
             foreach (var path in paths)
             {
-                    var file = TagLib.File.Create(path);
+                TagLib.File file;
+
+                again2:
+                try
+                {
+                    file = TagLib.File.Create(path);
+                }
+                catch(Exception ex)
+                {
+                    var result = MessageBox.Show(string.Format("Error occured when processing file\n\n{0}\n\n{1}", path, ex.Message), "Error occured", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error);
+
+                    switch(result)
+                    {
+                        case DialogResult.Abort: return;
+                        case DialogResult.Retry: goto again2;
+                        case DialogResult.Ignore: continue;
+                        default: throw new Exception("Unknown option clicked.");
+                    }
+                }
 
                 string relativePath;
                 if (path.StartsWith(musicFolder))
@@ -50,23 +95,26 @@ namespace MusicOrganizer
                 else
                     relativePath = path;
 
-                    objects.Add(new {
-                        filename = relativePath,
+                newItems.Add(new Item
+                {
+                    filename = path,
+                    relativeFilename = relativePath,
                     artist = file.Tag.FirstPerformer,
                     title = file.Tag.Title,
                     bpm = string.Format("{0}BPM", file.Tag.BeatsPerMinute)
                 });
             }
 
-                objectListView1.SetObjects(objects);
+            items = newItems;
+            objectListView1.SetObjects(items);
             objectListView1.AutoResizeColumns();
 
-                button2.Enabled = true;
+            button2.Enabled = items.Count > 0;
         }
-            catch (Exception ex)
+
+        private void button2_Click(object sender, EventArgs e)
         {
-                MessageBox.Show(ex.Message);
-            }
+
         }
     }
 }