From f6b8bdbeef23de6eea8d53692c2839f5561d4d2c Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Thu, 27 Jul 2023 23:11:37 +0800
Subject: [PATCH] fix: CheckComboBox ShowSelectAllButton issue.

---
 .../Controls/Input/CheckComboBox/CheckComboBox.cs               | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs b/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
index 85a73296..efa615f8 100644
--- a/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
+++ b/src/Shared/HandyControl_Shared/Controls/Input/CheckComboBox/CheckComboBox.cs
@@ -170,7 +170,7 @@ public class CheckComboBox : ListBox
         if (_selectAllItem != null)
         {
             _isInternalAction = true;
-            _selectAllItem.SetCurrentValue(IsSelectedProperty, SelectedItems.Count == Items.Count);
+            _selectAllItem.SetCurrentValue(IsSelectedProperty, Items.Count > 0 && SelectedItems.Count == Items.Count);
             _isInternalAction = false;
         }