完成了单击右键的删除功能，目前可以全部文件的显示框中可以达到实时显示更改内容（查询显示存在重复显示树状图的bug）

Front/main.py

 from PySide6.QtWidgets import QFileDialog, QWidget, QVBoxLayout, QTreeWidget, QApplication, QTreeWidgetItem
 from PySide6.QtCore import Signal, Qt, Slot, QObject
 from PySide6.QtSql import QSqlTableModel, QSqlDatabase
+from watchdog.observers import Observer
+from watchdog.events import FileSystemEventHandler
 import sqlite3
 from PySide6.QtGui import QIcon
 
             lambda item: self.itemDoubleClicked.emit(item.data(0, Qt.UserRole + 1)))
         self.__render_items(True)
 
+        # 设置 QTreeWidget 的 contextMenuPolicy 为 Qt.CustomContextMenu
+        widgets.allTreeWidget.setContextMenuPolicy(Qt.CustomContextMenu)
+        # 连接 customContextMenuRequested 信号到 contextMenuEvent 方法
+        widgets.allTreeWidget.customContextMenuRequested.connect(self.contextMenuEvent)
+
     def __render_items(self, is_clear: bool):
         if is_clear:
             widgets.allTreeWidget.clear()
             # 挂载到树上
             widgets.allTreeWidget.insertTopLevelItems(0, treeWidgetItems)
 
+    def contextMenuEvent(self, pos):
+        print("contextMenuEvent called")  # 调试信息
+        # 创建右键菜单
+        context_menu = QMenu(self)
+        delete_action = QAction("删除", self)
+        delete_action.triggered.connect(self.delete_item)
+        context_menu.addAction(delete_action)
+        context_menu.exec(widgets.allTreeWidget.mapToGlobal(pos))
+
+    def delete_item(self):
+        # 获取当前选中的项目
+        selected_items = widgets.allTreeWidget.selectedItems()
+        if not selected_items:
+            QMessageBox.warning(self, '警告', '请先选择一个项目')
+            return
+
+        item = selected_items[0]
+        data = item.data(0, Qt.UserRole + 1)
+        if not data:
+            QMessageBox.warning(self, '警告', '所选项目没有关联的数据')
+            return
+
+        # 获取数据库路径和表名
+        dbname = data['listData'][0]
+        tablename = data['listData'][2]
+        dbpath = os.path.join(os.path.abspath('../SQL'), f"{dbname}.db")
+        print(dbpath)
+        print(tablename)
+
+        # 确保 tablename 是 UTF-8 编码的字符串
+        try:
+            tablename_utf8 = tablename.encode('utf-8')
+        except Exception as e:
+            QMessageBox.critical(self, '错误', f'表名编码转换错误: {str(e)}')
+            return
+        print(tablename_utf8)
+        # 获取父节点
+        parent_item = item.parent()
+        if not parent_item:
+            QMessageBox.warning(self, '警告', '所选项目没有父节点')
+            return
+
+        parent_name = parent_item.text(0)
+        print(f"Parent Name: {parent_name}")
+
+        # 确定要删除的表
+        tables_to_delete = []
+        if parent_name == '水准测段高差稳定计算':
+            tables_to_delete = ['GC_Input_Param', 'GC_Input_Point', 'GC_Output_Point']
+        elif parent_name == '控制网复测平面基准计算':
+            tables_to_delete = ['GS_Input_Param', 'GS_Input_Point', 'GS_Result_Point', 'GS_Trans_Param', 'GS_Trans_Point']
+        elif parent_name == '平面控制网稳定性计算':
+            tables_to_delete = ['WD_Input_Param', 'WD_Input_Point', 'WD_Result_Param', 'WD_Result_Point']
+        else:
+            QMessageBox.warning(self, '警告', '未知的父节点')
+            return
+
+        # 确认删除操作
+        reply = QMessageBox.question(self, '确认删除', f'确定要删除项目表 {tablename} 吗？', QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+        if reply == QMessageBox.No:
+            return
+
+        # 清空表
+        try:
+            conn = sqlite3.connect(dbpath)
+            cursor = conn.cursor()
+            for table in tables_to_delete:
+                cursor.execute(f"DELETE FROM {table} WHERE TableName = ?", (tablename_utf8,))
+            conn.commit()
+            conn.close()
+            QMessageBox.information(self, '成功', f'表 {tablename} 中的数据已从相关表中删除')
+
+            # 刷新树状图
+            self.refresh_tree()
+        except Exception as e:
+            QMessageBox.critical(self, '错误', f'删除数据时出错: {str(e)}')
+            print(e)
+
+    def refresh_tree(self):
+        # 调用 MainWindow 的 refresh_tree 方法
+        main_window = QApplication.instance().activeWindow()
+        if isinstance(main_window, MainWindow):
+            main_window.refresh_tree()
+
 
 # 查询
 class ElTree1(QWidget):
             # 挂载到树上
             widgets.qureyTreeWidget.insertTopLevelItems(0, treeWidgetItems)
 
+class DatabaseChangeHandler(FileSystemEventHandler):
+    def __init__(self, main_window):
+        self.main_window = main_window
+
+    def on_modified(self, event):
+        if event.src_path.endswith('.db'):
+            print(f"Database file {event.src_path} has been modified.")
+            self.main_window.refresh_tree()
 
 class MainWindow(QMainWindow):
 
         # 连接信号与槽函数，实现点击操作
         self.ui.createFile.clicked.connect(self.on_create_file_clicked)
         self.ui.export_2.clicked.connect(self.on_export_2_clicked)
+        # 初始化数据库监控
+        self.observer = Observer()
+        self.observer.schedule(DatabaseChangeHandler(self), path=os.path.abspath('../SQL'), recursive=False)
+        self.observer.start()
         # self.comboBox_2 = QComboBox(self)
         # ...此处为省略代码...
         global widgets
         # self.bind()
 
         # 初始化树状数据库
-        tree_button = self.sql_init()
-        tree_button.itemClicked.connect(self.itembuttonClick)
-        tree_button.itemDoubleClicked.connect(self.itembuttonClick)
+        self.refresh_tree()
+
+        # tree_button = self.sql_init()
+        # tree_button.itemClicked.connect(self.itembuttonClick)
+        # tree_button.itemDoubleClicked.connect(self.itembuttonClick)
+    def closeEvent(self, event):
+        # 停止监控
+        self.observer.stop()
+        self.observer.join()
+        event.accept()
 
     # 绑定组件
     def bind(self):
     def mousePressEvent(self, event):
         # SET DRAG POS WINDOW
         # self.dragPos = event.globalPos()
-        self.dragPos = event.globalPosition().toPoint()
+        self.dragPos = event.globalPosition().toPoint()  # 设置鼠标拖动位置
 
         # 输出鼠标事件
         if event.buttons() == Qt.LeftButton:
         button = ElTree(ElTreeData(sqlitem))
         return button
 
+    # 刷新树状图
+    def refresh_tree(self):
+        # 清空当前的树状图
+        widgets.allTreeWidget.clear()
+        # 重新初始化树状图
+        tree_button = self.sql_init()
+        tree_button.itemClicked.connect(self.itembuttonClick)
+        tree_button.itemDoubleClicked.connect(self.itembuttonClick)
+
+
+
     # 关键词查询
     def searchClick(self):
         # GET BUTTON CLICKED