DataGridView自动添加新行-为什么？ [英] DataGridView automatically adds new row - why?

问题描述

您好，我有一个使用Windows Forms的较旧C＃应用程序，编写得很差。我最近不得不在应用程序中进行一些广泛的更改，现在我面临一个非常奇怪的问题。

Hello I have an older C# application using Windows Forms was written quite poorly. I recently had to make some extensive changes in the app, and now I'm facing quite strange problem.

该应用程序最初旨在在主窗口的OnLoad方法中加载数据（这是个糟糕的主意，我知道），然后进行重构以毫不干扰地将数据加载到另一个线程中。该应用程序使用BindingListView（ http://blw.sourceforge.net/ ），该实现非常简单

The application was first designed to load data in main windows OnLoad method (terrible idea, I know) and later refactored to load data in another thread unobtrusively. The application makes use of BindingListView (http://blw.sourceforge.net/) which is quite straightforward implementation of IBindingListView interface.

在对应用程序进行更改之前，一切正常。应用程序启动时加载了所有数据，并且没有任何问题（在等待应用程序加载数据时忽略了糟糕的用户体验）。

Before the changes I made to application everything worked fine. Application started with all data loaded and there was not any problem (ommiting bad user experience when waiting for app to load data).

但是当我将应用程序更改为加载数据时动态地在另一个线程中（首先将网格显示为空，然后将数据加载到其中），然后开始弹出一些空行，这些空行不在绑定到网格的ObservableCollection中。

But when I changed the application to load data dynamicly in another thread (the grid is first displayed empty and later the data are loaded to it), there started to pop up some empty rows, which were not in the ObservableCollection bound to the grid.

我设法跟踪到此调用堆栈的新添加的行：

I managed to track the new added rows to this call stack:

     Equin.ApplicationFramework.BindingListView.dll!Equin.ApplicationFramework.AggregateBindingListView<BusinessLogic.DataEntries.TrackEntry>.AddNew() Line 295 C#
    Equin.ApplicationFramework.BindingListView.dll!Equin.ApplicationFramework.AggregateBindingListView<BusinessLogic.DataEntries.TrackEntry>.System.ComponentModel.IBindingList.AddNew() Line 1617 + 0x8 bytes  C#
    System.Windows.Forms.dll!System.Windows.Forms.BindingSource.AddNew() + 0xbd bytes
    System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.AddNew() + 0x26 bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.DataGridViewDataConnection.AddNew() + 0x86 bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.DataGridViewDataConnection.OnNewRowNeeded() + 0x24 bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.OnRowEnter(ref System.Windows.Forms.DataGridViewCell dataGridViewCell = null, int columnIndex = 0, int rowIndex = 0, bool canCreateNewRow, bool validationFailureOccurred) + 0x10a bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.SetCurrentCellAddressCore(int columnIndex = 0, int rowIndex = 0, bool setAnchorCellAddress, bool validateCurrentCell, bool throughMouseClick = false) + 0x59f bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.SetAndSelectCurrentCellAddress(int columnIndex = 0, int rowIndex = 0, bool setAnchorCellAddress, bool validateCurrentCell, bool throughMouseClick, bool clearSelection = true, bool forceCurrentCellSelection = false) + 0x2a bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.MakeFirstDisplayedCellCurrentCell(bool includeNewRow) + 0x66 bytes
    System.Windows.Forms.dll!System.Windows.Forms.DataGridView.OnEnter(System.EventArgs e) + 0xe0 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.NotifyEnter() + 0x20 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.UpdateFocusedControl() + 0xc6 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.AssignActiveControlInternal(System.Windows.Forms.Control value = {System.Windows.Forms.DataGridView}) + 0x54 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActivateControlInternal(System.Windows.Forms.Control control, bool originator = false) + 0x76 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControlInternal(System.Windows.Forms.Control value = {System.Windows.Forms.DataGridView}) + 0x73 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.SetActiveControl(System.Windows.Forms.Control ctl) + 0x33 bytes
    System.Windows.Forms.dll!System.Windows.Forms.ContainerControl.ActiveControl.set(System.Windows.Forms.Control value) + 0x5 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.Select(bool directed, bool forward) + 0x1b bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.Select() + 0xf bytes
    System.Windows.Forms.dll!System.Windows.Forms.SplitContainer.SelectNextActiveControl(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x2c bytes
    System.Windows.Forms.dll!System.Windows.Forms.SplitContainer.SelectNextControlInContainer(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0xdc bytes
    System.Windows.Forms.dll!System.Windows.Forms.SplitContainer.Select(bool directed, bool forward) + 0x65 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControl(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x7b bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.SelectNextControlInternal(System.Windows.Forms.Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) + 0x4a bytes
    System.Windows.Forms.dll!System.Windows.Forms.Form.Active.set(bool value) + 0x11d bytes
    System.Windows.Forms.dll!System.Windows.Forms.Form.WmActivate(ref System.Windows.Forms.Message m) + 0x42 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Form.WndProc(ref System.Windows.Forms.Message m) + 0x146 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.OnMessage(ref System.Windows.Forms.Message m) + 0x10 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.ControlNativeWindow.WndProc(ref System.Windows.Forms.Message m) + 0x31 bytes
    System.Windows.Forms.dll!System.Windows.Forms.NativeWindow.Callback(System.IntPtr hWnd, int msg = 6, System.IntPtr wparam, System.IntPtr lparam) + 0x5a bytes
    [Native to Managed Transition]
    [Managed to Native Transition]
    System.Windows.Forms.dll!System.Windows.Forms.Control.SetVisibleCore(bool value = true) + 0x333 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Form.SetVisibleCore(bool value = true) + 0x87 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Control.Visible.set(bool value) + 0x11 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(int reason = -1, System.Windows.Forms.ApplicationContext context = {System.Windows.Forms.ApplicationContext}) + 0xe8 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Application.ThreadContext.RunMessageLoop(int reason, System.Windows.Forms.ApplicationContext context) + 0x61 bytes
    System.Windows.Forms.dll!System.Windows.Forms.Application.Run(System.Windows.Forms.Form mainForm) + 0x31 bytes
    Registr optické komunikace.exe!GUI.Program.Main() Line 29 + 0x1d bytes  C#
    [Native to Managed Transition]
    [Managed to Native Transition]
    mscorlib.dll!System.AppDomain.nExecuteAssembly(System.Reflection.Assembly assembly, string[] args) + 0x19 bytes
    mscorlib.dll!System.Runtime.Hosting.ManifestRunner.Run(bool checkAptModel) + 0x6e bytes
    mscorlib.dll!System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly() + 0x84 bytes
    mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext, string[] activationCustomData) + 0x65 bytes
    mscorlib.dll!System.Runtime.Hosting.ApplicationActivator.CreateInstance(System.ActivationContext activationContext) + 0xa bytes
    mscorlib.dll!System.Activator.CreateInstance(System.ActivationContext activationContext) + 0x3e bytes
    Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() + 0x23 bytes
    mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x66 bytes
    mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x6f bytes
    mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes

这让我怀疑，

所以我的问题是-DataGridView可以这样做吗？以及如何将其关闭？我的下一个问题也是，如果DataGridView只是在处理早些时候发给它的命令，我该如何追踪BindingListView的AddNew方法？

So my question is - can DataGridView do this? And how can it be turned off? My next question is also, how can I trace what is firing the AddNew method of BindingListView, if the DataGridView is just processing some commands issued to it earlier?

推荐答案

设置属性 AllowUserTAddRows = false; 或通过代码

myDataGridView.AllowUserToAddRows = false;

这篇关于DataGridView自动添加新行-为什么？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！