Toad Data Point启动崩溃，报NullReferenceException错误求助

问题现象 #

启动Toad Data Point时直接崩溃，弹出错误提示：

Toad遇到严重错误，必须关闭。请保存您的数据并关闭应用程序，我们对由此带来的不便深表歉意

日志中报错信息如下：

---------------------------------------------
NullReferenceException
Object reference not set to an instance of an object.

Stack Trace: 
   at Quest.Toad.ConnectionManager.ConnectMediator.IsEqual(ConnectMediator mediator, Boolean ignorePath, Boolean ignorName)
   at Quest.Toad.ConnectionManager.ConnectionHierarchy.FindExistingConnection(ConnListNode parent, ConnectMediator mediator, Boolean ignorePath)
   at Quest.Toad.ConnectionManager.ConnectionHierarchy.FindExistingConnection(ConnListNode parent, ConnectMediator mediator, Boolean ignorePath)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.AddConnections(StorageItem storageItem)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.AddItems(StorageItem storageItem)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.AddNodeItems(Boolean notify, Boolean ignorePath, ResultSet resultSet, ConnGroupNode groupNode, XmlNode platformNode)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.XmlToNodes(XmlDocument xmlDoc, ConnectionHierarchy hierarchy, Boolean notify, Boolean ignorePath)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.Load(ConnectionHierarchy connectionHierarchy, XmlDocument xmlDoc, Boolean notify, Boolean ignorePath)
   at Quest.Toad.ConnectionManager.ConnectionHierarchyStorage.Load(ConnectionHierarchy connectionHierarchy, Boolean notify)
   at Quest.Toad.ConnectionManager.ConnectionHierarchy..ctor()
   at Quest.Toad.ConnectionManager.ConnectionHierarchy.get_Instance()
   at Quest.Toad.Gui.MainForm.repositoryItemCurrentConnection_CustomDisplayText(Object sender, CustomDisplayTextEventArgs e)
   at DevExpress.XtraEditors.Repository.RepositoryItem.RaiseCustomDisplayText(CustomDisplayTextEventArgs e)
   at DevExpress.XtraEditors.Repository.RepositoryItem.GetDisplayText(FormatInfo format, Object editValue)
   at DevExpress.XtraEditors.Repository.RepositoryItemPopupContainerEdit.GetDisplayText(FormatInfo format, Object editValue)
   at DevExpress.XtraEditors.ViewInfo.TextEditViewInfo.GetDisplayText()
   at DevExpress.XtraEditors.ViewInfo.BaseEditViewInfo.OnEditValueChanged()
   at DevExpress.XtraEditors.ViewInfo.BaseEditViewInfo.set_EditValue(Object value)
   at DevExpress.XtraBars.ViewInfo.BarEditLinkViewInfo.GetEditSize(GraphicsCache cache)
   at DevExpress.XtraBars.ViewInfo.BarEditLinkViewInfo.CalcLinkIndent(BarIndent linkIndent)
   at DevExpress.XtraBars.ViewInfo.BarLinkViewInfo.CalcConstants()
   at DevExpress.XtraBars.ViewInfo.BarLinkViewInfo.CalcLinkSize(GraphicsCache cache, Object sourceObject)
   at DevExpress.XtraBars.ViewInfo.BarControlViewInfo.CalcLinkSize(BarItemLink link, GraphicsCache cache, Object sourceObject, BarLinkViewInfo linkInfo)
   at DevExpress.XtraBars.ViewInfo.BarControlViewInfo.PreCalcMultiLineSize(GraphicsCache cache, Object sourceObject, Int32 AMaxBarWidth, Int32& ARestWidth)
   at DevExpress.XtraBars.ViewInfo.DockedBarControlViewInfo.PreCalcMultiLineSize(GraphicsCache cache, Object sourceObject, Int32 AMaxBarWidth, Int32& ARestWidth)
   at DevExpress.XtraBars.ViewInfo.BarControlViewInfo.PreCalcBarDrawInfo(GraphicsCache cache, Object sourceObject, Int32 width)
   at DevExpress.XtraBars.ViewInfo.BarControlViewInfo.CalcBarSize(GraphicsCache cache, Object sourceObject, Int32 width, Int32 maxHeight)
   at DevExpress.XtraBars.Controls.CustomControl.CalcSize(Int32 width, Int32 maxHeight)
   at DevExpress.XtraBars.BarDockControl.IsEmpty(IDockableObject dockable)
   at DevExpress.XtraBars.BarDockControl.AddDockable(IDockableObject dockObject, Int32 rowIndex, Int32 colIndex, Boolean updateIndexes)
   at DevExpress.XtraBars.Bar.ApplyDocking(BarDockInfo dockInfo, Boolean applyFloatingBarLocation)
   at DevExpress.XtraBars.Utils.BarManagerDockingHelper.UpdateBarDocking(Boolean applyFloatingBarLocation)
   at DevExpress.XtraBars.Utils.BarManagerLoadHelper.LoadCore()
   at DevExpress.XtraBars.Utils.BarManagerLoadHelper.Load()
   at DevExpress.XtraBars.BarManager.OnFormLoadComplete(Object sender, EventArgs e)
   at DevExpress.XtraBars.BarManager.OnEndInit()
   at DevExpress.XtraEditors.Container.ComponentEditorContainer.EndInit()
   at Quest.Toad.Gui.MainForm.InitializeComponent()
   at Quest.Toad.Gui.MainForm..ctor()
   at Quest.Toad.StartupForm.MainAppicationEntryPoint(String[] args)
   at Quest.Toad.ToadProcessEntryPoint.Main(String[] args)

问题原因 #

从堆栈追踪来看，崩溃源于连接管理器加载连接配置时触发NullReferenceException，大概率是连接配置文件损坏导致程序无法正常解析连接信息。

解决方法 #

方法1：重置连接配置文件 #

• 关闭Toad Data Point（确保进程完全退出）
• 找到Toad配置存储目录：Windows默认路径为C:\Users\<你的用户名>\AppData\Roaming\Quest Software\Toad Data Point\<版本号>
• 找到Connections.xml文件，重命名为Connections_old.xml（作为备份）
• 重新启动Toad Data Point，程序会自动生成新的空白连接配置文件

方法2：安全模式启动 #

• 右键点击Toad Data Point快捷方式，选择“属性”
• 在“目标”栏末尾添加参数： -s（注意参数前有空格）
• 点击“确定”后启动程序，安全模式下会跳过自定义配置加载
• 若能正常启动，再逐步恢复或重新配置连接

方法3：修复/重装程序 #

• 打开控制面板，进入“程序和功能”
• 找到Toad Data Point，选择“更改”
• 选择“修复”选项，等待修复完成后重启程序
• 若修复无效，卸载后重新下载最新版本安装

内容的提问来源于stack exchange，提问作者nitin