* UIImageListBox: 从文件载入图片，并且解除占用

SunnyUI/Controls/UIImageListBox.Designer.cs

@@ -17,6 +17,13 @@
             {
                 components.Dispose();
             }
+
+            foreach (var item in Items)
+            {
+                if (item is ImageListItem imageItem)
+                    imageItem.Dispose();
+            }
+
             base.Dispose(disposing);
         }
 

SunnyUI/Controls/UIImageListBox.cs

@@ -727,14 +727,14 @@ namespace Sunny.UI
 
             public string Description { get; set; }
 
-            public Bitmap Image { get; private set; }
+            public Image Image { get; private set; }
 
             public ImageListItem(string imagePath, string description = "")
             {
                 if (File.Exists(imagePath))
                 {
                     ImagePath = imagePath;
-                    Image = new Bitmap(imagePath);
+                    Image = ImageEx.FromFile(imagePath);
                 }
 
                 Description = description;

SunnyUI/Static/UImage.cs

@@ -84,6 +84,26 @@ namespace Sunny.UI
             return sb.ToString();
         }
 
+        public static Image FromFile(string path)
+        {
+            if (File.Exists(path))
+            {
+                try
+                {
+                    byte[] bytes = File.ReadAllBytes(path);
+                    return System.Drawing.Image.FromStream(new MemoryStream(bytes));
+                }
+                catch (Exception)
+                {
+                    return null;
+                }
+            }
+            else
+            {
+                return null;
+            }
+        }
+
         public static Color RandomColor()
         {
             Random random = new Random();