精确优化程序关闭问题

全自动水压检测仪/StatusSettingsForm.cs

@@ -41,6 +41,12 @@ namespace 全自动水压检测仪
 
         private void UpdateTimer_Tick(object sender, EventArgs e)
         {
+            // 检查窗体状态
+            if (this.IsDisposed || !this.IsHandleCreated)
+            {
+                return;
+            }
+
             try
             {
                 UpdateStatusDisplay();
@@ -111,8 +117,20 @@ namespace 全自动水压检测仪
 
         private void StatusSettingsForm_FormClosing(object sender, FormClosingEventArgs e)
         {
-            _updateTimer?.Stop();
-            _updateTimer?.Dispose();
+            try
+            {
+                if (_updateTimer != null)
+                {
+                    _updateTimer.Stop();
+                    _updateTimer.Tick -= UpdateTimer_Tick;
+                    _updateTimer.Dispose();
+                    _updateTimer = null;
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine($"释放定时器资源失败: {ex.Message}");
+            }
         }
 
         private void uiButton_Close_Click(object sender, EventArgs e)