C# System.OutOfMemoryException与observablecollection_C#_Wpf_Memory Leaks_Observablecollection

C# System.OutOfMemoryException与observablecollection

c# wpf memory-leaks

C# System.OutOfMemoryException与observablecollection,c#,wpf,memory-leaks,observablecollection,C#,Wpf,Memory Leaks,Observablecollection,我正在使用绑定到dataGrid的可观察集合来使用所选客户的库存刷新网格我将遍历返回的集合，并使用foreach循环，以便UI了解新项请注意，我把这段代码放在一个按钮下只是为了测试，以确保我没有一些时髦的重新进入的东西 // Grab the customer ID int customerID = ((Customer)cboCustomer.SelectedItem).Customer_ID; ocInvento

我正在使用绑定到dataGrid的可观察集合来使用所选客户的库存刷新网格

我将遍历返回的集合，并使用foreach循环，以便UI了解新项

请注意，我把这段代码放在一个按钮下只是为了测试，以确保我没有一些时髦的重新进入的东西

            // Grab the customer ID 
            int customerID = ((Customer)cboCustomer.SelectedItem).Customer_ID;

            ocInventoryItems.Clear();
            ObservableCollection<InventoryItem> ocTemp = Inventory.RetrieveObservableCollection(customerID);
            foreach (InventoryItem item in ocTemp)
            {
                ocInventoryItems.Add(item);
            }

在库存被返回并分配给ocInventoryItems observablecollection之后，我得到一个内存不足异常

我读过关于物体2Gig限制的文章，但我认为我没有达到这一点。
从我所知道的情况来看，在将收藏加载到之后之前的增加量仅为6毫克。（使用GC.GetTotalMemory（true）；）

在库存搜索屏幕上也使用相同的查询和收集。该屏幕返回所有没有问题的库存

我也读过关于可观察集合的潜在内存泄漏，所以我尝试将绑定设置为“单向”和“一次性”。还是没有快乐

我已经在InventoryItem类的所有非只读属性上实现了iNotofiyPropertyChanged。（我已经读到，如果没有，可能会导致OC内存泄漏）

这似乎是一个真正的内存不足错误，但当我选择一个库存较少的客户时，我成功了

这让我相信，某个地方的内存没有被正确释放，或者存在漏洞

我只是不知道在哪里。我确实将此作为一项任务运行，但在找到问题之前，我暂时删除了它

堆栈跟踪：

Stack Trace:    at System.Windows.Media.Composition.DUCE.Channel.CreateOrAddRefOnChannel(Object instance, ResourceHandle& handle, ResourceType resourceType)
   at System.Windows.Media.Composition.VisualProxy.CreateOrAddRefOnChannel(Object instance, Channel channel, ResourceType resourceType)
   at System.Windows.Media.Visual.AddRefOnChannelCore(Channel channel)
   at System.Windows.Media.Visual.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle)
   at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx)
   at System.Windows.Media.Visual.Render(RenderContext ctx, UInt32 childIndex)
   at System.Windows.Media.CompositionTarget.Compile(Channel channel)
   at System.Windows.Media.CompositionTarget.System.Windows.Media.ICompositionTarget.Render(Boolean inResize, Channel channel)
   at System.Windows.Media.MediaContext.Render(ICompositionTarget resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
   at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)
   at System.Windows.Interop.HwndTarget.OnResize()
   at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate zzzzzzz

可能不是修复方案，但为什么是ocTemp
开始

验证

InventoryItem

在尝试的处置操作期间没有任何将其固定到内存的订阅。

验证

InventoryItem

在尝试的处置操作期间没有任何将其固定到内存的订阅。

验证

InventoryItem

没有在尝试处置操作期间将其固定到内存的任何订阅。

请验证

InventoryItem

在尝试处置操作期间没有任何将其固定到内存的订阅。

简短回答：这是一个“重新绘制”类型的问题。当我将网格的布局调整到屏幕上的不同位置时——没有问题，加载速度也很快

详细回答（我是如何做到的）：我尝试过将数据网格移动一点也没有用，所以我最初放弃了这个。下面是我所经历的步骤的快速列表
1）将datagrid和加载代码放在一个干净的窗口中。工作得很好
2）将datagrid和加载代码放在从我的公共ucBase继承的干净用户控件中。工作得很好
3）回到最初的用户控件，注释掉一个正在工作的datagrid，并将“坏”的一个放回原处。工作得很好
从那以后，我知道问题与布局和重画有关。我只是一步一步地重新组织布局，直到两个数据网格都在我想要的地方，并且没有内存错误。很抱歉，我不能说得更具体，但这是一个复杂的布局，包含多个GridSplitter、datagrids等
我的理论：我猜我的控件布局不好，这导致每次我在可观察集合中添加一行时都会发生复杂的重画
相关问题：当scrollviewer中的网格以某种方式导致代码锁定时，我以前见过这个问题。我应该猜到这些问题是相似的
希望这对别人有帮助。对于一个简单的修复来说，这是一条漫长的道路
更新：

Stack Trace: at System.Windows.Media.Composition.DUCE.Channel.CreateOrAddRefOnChannel(Object instance, ResourceHandle& handle, ResourceType resourceType) at System.Windows.Media.Composition.VisualProxy.CreateOrAddRefOnChannel(Object instance, Channel channel, ResourceType resourceType) at System.Windows.Media.Visual.AddRefOnChannelCore(Channel channel) at System.Windows.Media.Visual.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.Render(RenderContext ctx, UInt32 childIndex) at System.Windows.Media.CompositionTarget.Compile(Channel channel) at System.Windows.Media.CompositionTarget.System.Windows.Media.ICompositionTarget.Render(Boolean inResize, Channel channel) at System.Windows.Media.MediaContext.Render(ICompositionTarget resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget) at System.Windows.Interop.HwndTarget.OnResize() at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam) at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate zzzzzzz

今晚我偶然发现了一些更清晰的东西。如果dataGrid位于网格行内，且行高为“自动”，并且您正在向dataGrid绑定到的集合添加许多项（在我的情况下超过9000项）。。。wpf在每次添加到集合后都会尝试调整大小，这让您的内存变得疯狂。像“1*”这样的简单星星大小的高度让一切都很快乐
简短回答：这是一个“重新起草”的问题。当我将网格的布局调整到屏幕上的不同位置时——没有问题，加载速度也很快
详细回答（我是如何做到的）：我尝试过将数据网格移动一点也没有用，所以我最初放弃了这个。下面是我所经历的步骤的快速列表
1）将datagrid和加载代码放在一个干净的窗口中。工作得很好
2）将datagrid和加载代码放在从我的公共ucBase继承的干净用户控件中。工作得很好
3）回到最初的用户控件，注释掉一个正在工作的datagrid，并将“坏”的一个放回原处。工作得很好
从那以后，我知道问题与布局和重画有关。我只是一步一步地重新组织布局，直到两个数据网格都在我想要的地方，并且没有内存错误。很抱歉，我不能说得更具体，但这是一个复杂的布局，包含多个GridSplitter、datagrids等
我的理论：我猜我的控件布局不好，这导致每次我在可观察集合中添加一行时都会发生复杂的重画
相关问题：当scrollviewer中的网格以某种方式导致代码锁定时，我以前见过这个问题。我应该猜到这些问题是相似的
希望这对别人有帮助。对于一个简单的修复来说，这是一条漫长的道路
更新：

Stack Trace: at System.Windows.Media.Composition.DUCE.Channel.CreateOrAddRefOnChannel(Object instance, ResourceHandle& handle, ResourceType resourceType) at System.Windows.Media.Composition.VisualProxy.CreateOrAddRefOnChannel(Object instance, Channel channel, ResourceType resourceType) at System.Windows.Media.Visual.AddRefOnChannelCore(Channel channel) at System.Windows.Media.Visual.System.Windows.Media.Composition.DUCE.IResource.AddRefOnChannel(Channel channel) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.UpdateChildren(RenderContext ctx, ResourceHandle handle) at System.Windows.Media.Visual.RenderRecursive(RenderContext ctx) at System.Windows.Media.Visual.Render(RenderContext ctx, UInt32 childIndex) at System.Windows.Media.CompositionTarget.Compile(Channel channel) at System.Windows.Media.CompositionTarget.System.Windows.Media.ICompositionTarget.Render(Boolean inResize, Channel channel) at System.Windows.Media.MediaContext.Render(ICompositionTarget resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget) at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget) at System.Windows.Interop.HwndTarget.OnResize() at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam) at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate zzzzzzz
一些加法