修复FloatButton，FlowPanel，StackPanel属性改变失效问题

Views/FloatButtonDemo.cs

@@ -163,18 +163,21 @@ namespace AntdUIDemo.Views
             if (InvokeRequired)
             {
                 Invoke(new Action(CloseFloatButtonForm));
-                return;
             }
-
-            if (floatButtonForm != null)
+            else
             {
-                floatButtonForm.Close();
-                floatButtonForm.Dispose();
-                floatButtonForm = null;
+                // Ensure that floatButtonForm is not null before attempting to close it
+                if (floatButtonForm != null)
+                {
+                    floatButtonForm.Close();
+                    floatButtonForm.Dispose();
+                    floatButtonForm = null;
+                }
             }
         }
 
 
+
         #region EventHandler
         private void select_intvalue_SelectedIndexChanged(object sender, IntEventArgs e)
         {

Views/FlowPanelDemo.cs

@@ -75,7 +75,14 @@ namespace AntdUIDemo.Views
 
         private void switch_autoscroll_CheckedChanged(object sender, BoolEventArgs e)
         {
-            flowPanel.AutoScroll = switch_autoscroll.Checked;
+            if (flowPanel.InvokeRequired)
+            {
+                flowPanel.Invoke(new Action(() => { flowPanel.AutoScroll = switch_autoscroll.Checked; }));
+            }
+            else
+            {
+                flowPanel.AutoScroll = switch_autoscroll.Checked;
+            }
         }
 
         // 初始化下拉框
@@ -95,6 +102,10 @@ namespace AntdUIDemo.Views
             {
                 flowPanel.Invoke(new Action(() => { flowPanel.Align = (TAlignFlow)select_align.SelectedValue; }));
             }
+            else
+            {
+                flowPanel.Align = (TAlignFlow)select_align.SelectedValue;
+            }
         }
 
         private void input_gap_ValueChanged(object sender, DecimalEventArgs e)
@@ -103,6 +114,10 @@ namespace AntdUIDemo.Views
             {
                 flowPanel.Invoke(new Action(() => { flowPanel.Gap = (int)input_gap.Value; }));
             }
+            else
+            {
+                flowPanel.Gap = (int)input_gap.Value;
+            }
         }
         // 添加按钮
         private void buttonADD_Click(object sender, EventArgs e)

Views/ModalDemo.cs

@@ -54,6 +54,8 @@ namespace AntdUIDemo.Views
             AntdUI.Modal.open(new AntdUI.Modal.Config(window, "Basic Modal", "Some contents...\r\nSome contents...\r\nSome contents...")
             {
                 CloseIcon = true,
+                Keyboard = false,
+                MaskClosable = false,
             });
         }
 
@@ -61,6 +63,8 @@ namespace AntdUIDemo.Views
         {
             AntdUI.Modal.open(new AntdUI.Modal.Config(window, "Basic Modal", "Some contents...\r\nSome contents...\r\nSome contents...")
             {
+                //禁止使用键盘关闭
+                Keyboard = false,
                 MaskClosable = false,
             });
         }

Views/StackPanelDemo.cs

@@ -89,6 +89,10 @@ namespace AntdUIDemo.Views
                     stackPanel.ItemSize = input_itemsize.Text;
                 }));
             }
+            else
+            {
+                stackPanel.ItemSize = input_itemsize.Text;
+            }
         }
 
         private void input_gap_ValueChanged(object sender, DecimalEventArgs e)
@@ -100,6 +104,10 @@ namespace AntdUIDemo.Views
                     stackPanel.Gap = (int)input_gap.Value;
                 }));
             }
+            else
+            {
+                stackPanel.Gap = (int)input_gap.Value;
+            }
         }
 
         private void ButtonDEL_Click(object sender, EventArgs e)