* UIListBox：增加Items变更的事件

SunnyUI/Controls/UIComboBox.cs

@@ -42,13 +42,14 @@ namespace Sunny.UI
             ListBox.DisplayMemberChanged += Box_DisplayMemberChanged;
             ListBox.ValueMemberChanged += Box_ValueMemberChanged;
             ListBox.SelectedValueChanged += ListBox_SelectedValueChanged;
-            ListBox.ItemsCountChange += ListBox_ItemsCountChange;
+            ListBox.ItemsClear += ListBox_ItemsClear;
+            ListBox.ItemsRemove += ListBox_ItemsRemove;
             edit.TextChanged += Edit_TextChanged;
             DropDownWidth = 150;
             fullControlSelect = true;
         }
 
-        private void ListBox_ItemsCountChange(object sender, EventArgs e)
+        private void ListBox_ItemsRemove(object sender, EventArgs e)
         {
             if (ListBox.Count == 0)
             {
@@ -57,6 +58,12 @@ namespace Sunny.UI
             }
         }
 
+        private void ListBox_ItemsClear(object sender, EventArgs e)
+        {
+            Text = "";
+            edit.Text = "";
+        }
+
         public new EventHandler TextChanged;
 
         private void Edit_TextChanged(object sender, EventArgs e)

SunnyUI/Controls/UIListBox.cs

@@ -66,14 +66,44 @@ namespace Sunny.UI
             listbox.MouseDown += Listbox_MouseDown;
             listbox.MouseUp += Listbox_MouseUp;
             listbox.MouseMove += Listbox_MouseMove;
-            ListBox.DataSourceChanged += Box_DataSourceChanged;
+            listbox.DataSourceChanged += Box_DataSourceChanged;
-            ListBox.DisplayMemberChanged += Box_DisplayMemberChanged;
+            listbox.DisplayMemberChanged += Box_DisplayMemberChanged;
-            ListBox.ValueMemberChanged += Box_ValueMemberChanged;
+            listbox.ValueMemberChanged += Box_ValueMemberChanged;
+            listbox.ItemsClear += Listbox_ItemsClear;
+            listbox.ItemsAdd += Listbox_ItemsAdd;
+            listbox.ItemsRemove += Listbox_ItemsRemove;
+            listbox.ItemsInsert += Listbox_ItemsInsert;
 
             timer.Tick += Timer_Tick;
             timer.Start();
         }
 
+        public event EventHandler ItemsClear;
+        public event EventHandler ItemsAdd;
+        public event EventHandler ItemsRemove;
+        public event EventHandler ItemsInsert;
+
+        private void Listbox_ItemsInsert(object sender, EventArgs e)
+        {
+            ItemsInsert?.Invoke(this, e);
+        }
+
+        private void Listbox_ItemsRemove(object sender, EventArgs e)
+        {
+            ItemsRemove?.Invoke(this, e);
+        }
+
+        private void Listbox_ItemsAdd(object sender, EventArgs e)
+        {
+            ItemsAdd?.Invoke(this, e);
+        }
+
+
+        private void Listbox_ItemsClear(object sender, EventArgs e)
+        {
+            ItemsClear?.Invoke(this, e);
+        }
+
         [Browsable(false)]
         public ListBox ListBox => listbox;
 
@@ -460,6 +490,44 @@ namespace Sunny.UI
             SetScrollInfo();
         }
 
+        public event EventHandler ItemsClear;
+        public event EventHandler ItemsAdd;
+        public event EventHandler ItemsRemove;
+        public event EventHandler ItemsInsert;
+
+        protected override void WndProc(ref Message m)
+        {
+            if (IsDisposed || Disposing) return;
+            if (IsHandleCreated)
+            {
+                const int LB_ADDSTRING = 0x0180;
+                const int LB_INSERTSTRING = 0x0181;
+                const int LB_DELETESTRING = 0x0182;
+                const int LB_RESETCONTENT = 0x0184;
+                if (m.Msg == LB_RESETCONTENT)
+                {
+                    ItemsClear?.Invoke(this, EventArgs.Empty);
+                }
+
+                if (m.Msg == LB_DELETESTRING)
+                {
+                    ItemsRemove?.Invoke(this, EventArgs.Empty);
+                }
+
+                if (m.Msg == LB_ADDSTRING)
+                {
+                    ItemsAdd?.Invoke(this, EventArgs.Empty);
+                }
+
+                if (m.Msg == LB_INSERTSTRING)
+                {
+                    ItemsInsert?.Invoke(this, EventArgs.Empty);
+                }
+            }
+
+            base.WndProc(ref m);
+        }
+
         protected override void OnSizeChanged(EventArgs e)
         {
             if (Bar != null && Bar.Visible)