WPF 动态布局Grid

 //开启线程加载
             Action a = () =>
             {
                 var row = ;
                 var column = ;

                 var path = "../../face_img/";
                 var files = Directory.GetFiles(path);
                 for (var i = ; i < row; i++)
                 {
                     faceGrid.RowDefinitions.Add(new RowDefinition());
                 }
                 for (var i = ; i < column; i++)
                 {
                     faceGrid.ColumnDefinitions.Add(new ColumnDefinition());
                 }
                 var index = ;
                 for (var i = ; i < row; i++)
                 {
                     for (var j = ; j < column; j++, index++)
                     {
                         if (index < files.Length)
                         {
                             var btn = new Button { Width = , Height =  };
                             var image = new GifImage { Source = System.IO.Path.GetFullPath(files[index]), Stretch = Stretch.Fill };
                             btn.Click += btn_Click;
                             image.ToolTip = "["+ System.IO.Path.GetFileName(files[index]) + "]";
                             btn.Tag = "[" + System.IO.Path.GetFileName(files[index]) + "]";
                             image.OpacityMask = this.Background;
                             image.Width = btn.Width-;
                             image.Height = btn.Height-;
                             btn.BorderBrush = Brushes.WhiteSmoke;
                             btn.Background = Brushes.White;
                             btn.Content = image;
                             Grid.SetRow(btn, i);
                             Grid.SetColumn(btn, j);

                             faceGrid.Children.Add(btn);
                         }
                     }
                 }
             };
             this.faceGrid.Dispatcher.Invoke(a);

layout