Implemented ListView showing songs grouped by BPM

MusicOrganizer/MainForm.Designer.cs

@@ -32,6 +32,10 @@
             this.button2 = new System.Windows.Forms.Button();
             this.button1 = new System.Windows.Forms.Button();
             this.objectListView1 = new BrightIdeasSoftware.ObjectListView();
+            this.columnFilename = ((BrightIdeasSoftware.OLVColumn)(new BrightIdeasSoftware.OLVColumn()));
+            this.columnArtist = ((BrightIdeasSoftware.OLVColumn)(new BrightIdeasSoftware.OLVColumn()));
+            this.columnTitle = ((BrightIdeasSoftware.OLVColumn)(new BrightIdeasSoftware.OLVColumn()));
+            this.columnBpm = ((BrightIdeasSoftware.OLVColumn)(new BrightIdeasSoftware.OLVColumn()));
             this.panel1.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)(this.objectListView1)).BeginInit();
             this.SuspendLayout();
@@ -64,17 +68,49 @@
             this.button1.TabIndex = 0;
             this.button1.Text = "Select music folder";
             this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
             // 
             // objectListView1
             // 
+            this.objectListView1.AllColumns.Add(this.columnFilename);
+            this.objectListView1.AllColumns.Add(this.columnArtist);
+            this.objectListView1.AllColumns.Add(this.columnTitle);
+            this.objectListView1.AllColumns.Add(this.columnBpm);
+            this.objectListView1.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
+            this.columnFilename,
+            this.columnArtist,
+            this.columnTitle});
             this.objectListView1.Dock = System.Windows.Forms.DockStyle.Fill;
             this.objectListView1.Location = new System.Drawing.Point(0, 61);
             this.objectListView1.Name = "objectListView1";
             this.objectListView1.Size = new System.Drawing.Size(629, 773);
             this.objectListView1.TabIndex = 1;
             this.objectListView1.UseCompatibleStateImageBehavior = false;
+            this.objectListView1.UseOverlays = false;
             this.objectListView1.View = System.Windows.Forms.View.Details;
             // 
+            // columnFilename
+            // 
+            this.columnFilename.AspectName = "filename";
+            this.columnFilename.Text = "Filename";
+            // 
+            // columnArtist
+            // 
+            this.columnArtist.AspectName = "artist";
+            this.columnArtist.Text = "Artist";
+            // 
+            // columnTitle
+            // 
+            this.columnTitle.AspectName = "title";
+            this.columnTitle.Text = "Title";
+            // 
+            // columnBpm
+            // 
+            this.columnBpm.AspectName = "bpm";
+            this.columnBpm.DisplayIndex = 3;
+            this.columnBpm.IsVisible = false;
+            this.columnBpm.Text = "Bpm";
+            // 
             // MainForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(9F, 20F);
@@ -96,5 +132,9 @@
         private System.Windows.Forms.Button button2;
         private System.Windows.Forms.Button button1;
         private BrightIdeasSoftware.ObjectListView objectListView1;
+        private BrightIdeasSoftware.OLVColumn columnFilename;
+        private BrightIdeasSoftware.OLVColumn columnArtist;
+        private BrightIdeasSoftware.OLVColumn columnTitle;
+        private BrightIdeasSoftware.OLVColumn columnBpm;
     }
 }

MusicOrganizer/MainForm.cs

@@ -1,11 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
+using System.IO;
-using System.Data;
-using System.Drawing;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Forms;
 
 namespace MusicOrganizer
@@ -15,6 +10,63 @@ namespace MusicOrganizer
         public MainForm()
         {
             InitializeComponent();
+
+            objectListView1.AlwaysGroupByColumn = columnBpm;
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                string musicFolder;
+
+                using (var dialog = new FolderBrowserDialog())
+                {
+                    var result = dialog.ShowDialog();
+
+                    if (result != DialogResult.OK)
+                        return;
+
+                    if (string.IsNullOrWhiteSpace(dialog.SelectedPath))
+                        return;
+
+                    musicFolder = dialog.SelectedPath;
+                }
+
+                if (!musicFolder.EndsWith("\\") && !musicFolder.EndsWith("/"))
+                    musicFolder += Path.DirectorySeparatorChar;
+
+                var paths = Directory.GetFileSystemEntries(musicFolder, "*.mp3", SearchOption.AllDirectories);
+
+                var objects = new List<object>();
+
+                foreach (var path in paths)
+                {
+                    var file = TagLib.File.Create(path);
+
+                    string relativePath;
+                    if (path.StartsWith(musicFolder))
+                        relativePath = path.Remove(0, musicFolder.Length);
+                    else
+                        relativePath = path;
+
+                    objects.Add(new {
+                        filename = relativePath,
+                        artist = file.Tag.FirstPerformer,
+                        title = file.Tag.Title,
+                        bpm = string.Format("{0}BPM", file.Tag.BeatsPerMinute)
+                    });
+                }
+
+                objectListView1.SetObjects(objects);
+                objectListView1.AutoResizeColumns();
+
+                button2.Enabled = true;
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message);
+            }
         }
     }
 }