WPF MVVM背景打印数据绑定问题 [英] WPF MVVM background printing databinding issue

问题描述

我正在使用wpf / mvvm开发销售点应用程序。在交易生命周期的许多部分，将在后台打印收据。我已经用其他的例子来生成和打印收据在后台很好。我在后台打印一个UserControl，一切看起来都很棒。

然后我创建了控件的ViewModel，因此可以加载一个要打印的事务。我开始使用2个基本文本框 - 一个文本标题客户端收据，顶部打印在：MM / dd / yy hh：mm tt。

调试器在按下打印按钮时显示生命周期的方式：

• 创建新的控件实例。


• 创建ViewModel的新实例


• 设置INPC属性的文本


• 在控制以获得所需的预打印尺寸


• 加载打印对话框&检索名称打印队列


• 缩放控件的大小以适应收据纸（不应该为我当前选择的打印机进行缩放，因为ImageArea宽度设置为与我的UC相同） / li>
  
• 根据新缩放图像大小重新测量和排列网格


• 调用PrintDialog.PrintVisual - 发送UserControl


• 打印机发出收据 - 没有数据绑定文本


• 然后，我的调试器进入get {return _HeaderText; }部分代码 - 在控件已经被打印之后。

有没有办法强制控件的数据绑定发送到打印机，而不必在面板中加载控件并使其可见？例如，我想要从刷新信用卡并从后面的签名行打印收据，从一个小的弹出窗口中询问CC详细信息（或滑动）。

有没有更好的方式来实现？

PrintReceipt方法：

  ClientReceiptView control = new ClientReceiptView（Message）; 
 System.Windows.Controls.PrintDialog printDlg = new System.Windows.Controls.PrintDialog（）; 
 PrintQueue ReceiptPrinter = new LocalPrintServer（）。GetPrintQueue（CITIZEN CT-S310）; 
 PrintCapabilities PC = ReceiptPrinter.GetPrintCapabilities（）; 
 printDlg.PrintQueue = ReceiptPrinter; 
 control.Measure（new Size（Double.PositiveInfinity，Double.PositiveInfinity））; 
大小PreGridSize = control.DesiredSize; 
 double Scale = Math.Min（PC.PageImageableArea.ExtentWidth / PreGridSize.Width，PC.PageImageableArea.ExtentHeight / PreGridSize.Height）; 
 control.LayoutTransform = new System.Windows.Media.ScaleTransform（Scale，Scale）; 
 Size PaperSize = new Size（PC.PageImageableArea.ExtentWidth，Math.Min（PC.PageImageableArea.ExtentHeight，PreGridSize.Height））; 
 control.Measure（PaperSize）; 
 Point ptGrid = new Point（PC.PageImageableArea.OriginWidth，PC.PageImageableArea.OriginHeight）; 
 control.Arrange（new Rect（ptGrid，PaperSize））; 
 printDlg.PrintVisual（control，My App）; 
  

和View构造函数（带参数）

  public ClientReceiptView（string Header）
 {
 InitializeComponent（）; 
 vm = new ClientReceiptViewModel（Header）; 
 this.DataContext = vm; 
} 
  

而ViewModel：

  public class ClientReceiptViewModel：ViewModelBase 
 {
 #region属性
 
私有字符串_HeaderText; 
 
 public string HeaderText 
 {
 get {return _HeaderText; } 
 set {_HeaderText = value; OnPropertyChanged（HeaderText）; } 
} 
 
 private int _TripID; 
 
 public int TripID 
 {
 get {return _TripID; } 
 set {_TripID = value; OnPropertyChanged（TripID）; } 
} 
 
私有字符串_PrintedOn; 
 
 public string PrintedOn 
 {
 get {return _PrintedOn; } 
 set {_PrintedOn = value; OnPropertyChanged（PrintedOn）; 
} 
 
 #endregion 
 
 public ClientReceiptViewModel（string Header）
 {
 HeaderText = Header; 
 TripID = 2220013; 
 PrintedOn =Printed：+ DateTime.Now.ToString（MM / dd / yy hh：mm tt）; 
} 
} 
  

编辑：从绑定/创建调用堆栈中断OnPropertyChanged（HeaderText）：

  Namespace.Main.POS.Receipts.ClientReceiptViewModel.PrintedOn.set（string value）Line 38 C＃
 Namespace.Main.POS.Receipts.ClientReceiptViewModel.SetData（string Header）Line 79 + 0x4f bytes C＃
 Namespace.Main.POS.Receipts.ClientReceiptView.ClientReceiptView（string Header）第28行+ 0x13字节C＃
 Namespace.Main.POS.Receipts.PrintReceipt.PrintClientReceipt（字符串消息）行12 + 0x1e字节C＃
 Namespace.Main.MainWindowView.button1_Click（object sender，System.Windows.RoutedEventArgs e）Line 23 + 0xb bytes C＃
 PresentationCore.dll！System.Windows.RoutedEventHandlerInfo.InvokeHandler（object target，System.Windows.RoutedEventArgs routedEventArgs）+ 0x78 bytes 
 PresentationCore.dll！System.Windows.EventRoute.InvokeHandlersImpl（对象源，System.Windows.RoutedEventArgs args，bool reRaised）+ 0xbe bytes 
 PresentationCore.dll！System.Windows.UIElement.RaiseEventImpl（System.Windows.DependencyObject sender，System.Windows.RoutedEventArgs args）+ 0x79 bytes 
 PresentationCore.dll！System.Windows.UIElement.RaiseEvent （System.Windows.RoutedEventArgs e）+ 0x17 bytes 
 PresentationFramework.dll！System.Windows.Controls.Primitives.ButtonBase.OnClick（）+ 0x4b bytes 
 PresentationFramework.dll！System.Windows.Controls.Button .OnClick（）+ 0x4d bytes 
 PresentationFramework.dll！System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp（System.Windows.Input.MouseButtonEventArgs e）+ 0x9e bytes 
 PresentationCore.dll！System.Windows .UIElement.OnMouseLeftButtonUpThunk（object sender，System.Windows.Input.MouseButtonEventArgs e）+ 0x6c bytes 
 PresentationCore.dll！System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler（System.Delegate genericHandler，object genericTarget）+ 0x31 bytes 
 PresentationCore.dll！System.Windows.RoutedEventArgs.InvokeH andler（System.Delegate handler，object target）+ 0x29 bytes 
 PresentationCore.dll！System.Windows.RoutedEventHandlerInfo.InvokeHandler（object target，System.Windows.RoutedEventArgs routedEventArgs）+ 0x3e bytes 
 PresentationCore.dll！ System.Windows.EventRoute.InvokeHandlersImpl（object source，System.Windows.RoutedEventArgs args，bool reRaised）+ 0xbe bytes 
 PresentationCore.dll！System.Windows.UIElement.ReRaiseEventAs（System.Windows.DependencyObject sender，System.Windows .RoutedEventArgs args，System.Windows.RoutedEvent newEvent）+ 0x114 bytes 
 PresentationCore.dll！System.Windows.UIElement.OnMouseUpThunk（object sender，System.Windows.Input.MouseButtonEventArgs e）+ 0xc5 bytes 
 PresentationCore .dll！System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler（System.Delegate genericHandler，object genericTarget）+ 0x31 bytes 
 PresentationCore.dll！System.Windows.RoutedEventArgs.InvokeHandler（System.Delegate handler，object target）+ 0x29字节
 PresentationCore.dll！System.Windows.RoutedEventHandlerInfo.InvokeHandler（object target，System.Windows.RoutedEventArgs routedEventArgs）+ 0x3e bytes 
 PresentationCore.dll！System.Windows.EventRoute.InvokeHandlersImpl（object source，System.Windows。 RoutedEventArgs args，bool reRaised）+ 0xbe bytes 
 PresentationCore.dll！System.Windows.UIElement.RaiseEventImpl（System.Windows.DependencyObject sender，System.Windows.RoutedEventArgs args）+ 0x79 bytes 
 PresentationCore.dll！ System.Windows.UIElement.RaiseTrustedEvent（System.Windows.RoutedEventArgs args）+ 0x41 bytes 
 PresentationCore.dll！System.Windows.UIElement.RaiseEvent（System.Windows.RoutedEventArgs args，bool trusted）+ 0x2c bytes 
 PresentationCore.dll！System.Windows.Input.InputManager.ProcessStagingArea（）+ 0x1ff bytes 
 PresentationCore.dll！System.Windows.Input.InputManager.ProcessInput（System.Windows.Input.InputEventArgs input）+ 0x45 bytes 
 PresentationCore.dll！System.Windows.Input.Input ProviderSite.ReportInput（System.Windows.Input.InputReport inputReport）+ 0x62 bytes 
 PresentationCore.dll！System.Windows.Interop.HwndMouseInputProvider.ReportInput（System.IntPtr hwnd，System.Windows.Input.InputMode mode，int timestamp ，System.Windows.Input.RawMouseActions操作，int x，int y，int wheel）+ 0x2c2 bytes 
 PresentationCore.dll！System.Windows.Interop.HwndMouseInputProvider.FilterMessage（System.IntPtr hwnd，MS.Internal.Interop .WindowMessage msg，System.IntPtr wParam，System.IntPtr lParam，ref bool处理）+ 0x67d字节
 PresentationCore.dll！System.Windows.Interop.HwndSource.InputFilterMessage（System.IntPtr hwnd，int msg，System.IntPtr wParam，System.IntPtr lParam，ref bool处理）+ 0x75字节
 WindowsBase.dll！MS.Win32.HwndWrapper.WndProc（System.IntPtr hwnd，int msg，System.IntPtr wParam，System.IntPtr lParam，ref bool处理）+ 0xbe字节
 WindowsBase.dll！MS.Win32.HwndSubclass.DispatcherCallbackOperation（object o）+ 0x7d bytes 
 Win dowsBase.dll！System.Windows.Threading.ExceptionWrapper.InternalRealCall（System.Delegate callback，object args，int numArgs）+ 0x53 bytes 
 WindowsBase.dll！MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen（object source，System .Delegate方法，对象args，int numArgs，System.Delegate catchHandler）+ 0x42 bytes 
 WindowsBase.dll！System.Windows.Threading.Dispatcher.InvokeImpl（System.Windows.Threading.DispatcherPriority priority，System.TimeSpan timeout， System.Delegate方法，对象args，int numArgs）+ 0xb4字节
 WindowsBase.dll！MS.Win32.HwndSubclass.SubclassWndProc（System.IntPtr hwnd，int msg，System.IntPtr wParam，System.IntPtr lParam）+ 0x104字节
 [本机到托管转换] 
 [管理到本地转换] 
 WindowsBase.dll！System.Windows.Threading.Dispatcher.PushFrameImpl（System.Windows.Threading.DispatcherFrame框架）+ 0xc1字节
 WindowsBase.dll！System.Windows.Threading.Dispatcher.PushFrame（System.Windows.Threading.Dispat cherFrame框架）+ 0x49字节
 PresentationFramework.dll！System.Windows.Application.RunDispatcher（对象忽略）+ 0x5b字节
 PresentationFramework.dll！System.Windows.Application.RunInternal（System.Windows.Window窗口）+ 0x74 bytes 
 PresentationFramework.dll！System.Windows.Application.Run（System.Windows.Window window）+ 0x2b bytes 
 PresentationFramework.dll！System.Windows.Application.Run（）+ 0x1b bytes 
 Namespace.App.Main（）+ 0x5e bytes C＃
 [本机到托管转换] 
 [管理到本地转换] 
 mscorlib.dll！System.AppDomain.nExecuteAssembly（系统.Reflection.RuntimeAssembly assembly，string [] args）+ 0x9 bytes 
 mscorlib.dll！System.Runtime.Hosting.ManifestRunner.Run（bool checkAptModel）+ 0x6e bytes 
 mscorlib.dll！System.Runtime。 Hosting.ManifestRunner.ExecuteAsAssembly（）+ 0x90 bytes 
 mscorlib.dll！System.Runtime.Hosting.ApplicationActivator.CreateInstance（System.ActivationContext activationContext，string [] activati onCustomData）+ 0x65 bytes 
 mscorlib.dll！System.Runtime.Hosting.ApplicationActivator.CreateInstance（System.ActivationContext activationContext）+ 0xd bytes 
 mscorlib.dll！System.Activator.CreateInstance（System.ActivationContext activationContext） + 0x44 bytes 
 Microsoft.VisualStudio.HostingProcess.Utilities.dll！Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone（）+ 0x23 bytes 
 mscorlib.dll！System.Threading.ThreadHelper.ThreadStart_Context（object state） + 0x63字节
 mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state，bool ignoreSyncCtx）+ 0xb0 bytes 
 mscorlib.dll！ System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x2c bytes 
 mscorlib.dll！System.Threading.ThreadHelper.ThreadStart（）+ 0x44 bytes 
 [马来西亚本土] naged Transition] 
  

然后在printDlg.PrintVisual（控件，我的应用）;发出，收据打印出来，然后在断点上调用堆栈get {return _PrintedOn; }：

  Namespace.Main.POS.Receipts.ClientReceiptViewModel.PrintedOn.get（）行37 C＃
 [本机到托管转换] 
 PresentationFramework.dll！MS.Internal.Data.PropertyPathWorker.GetValue（对象项，int级别）+ 0x108字节
 PresentationFramework.dll！MS.Internal.Data.PropertyPathWorker.RawValue（int k）+ 0x4a bytes 
 PresentationFramework.dll！MS.Internal.Data.PropertyPathWorker.RawValue（）+ 0x12 bytes 
 PresentationFramework.dll！MS.Internal.Data.ClrBindingWorker.RawValue（）+ 0x11 bytes 
 PresentationFramework.dll！System.Windows.Data.BindingExpression.TransferValue（object newValue，bool isASubPropertyChange）+ 0xa7 bytes 
 PresentationFramework.dll！System.Windows.Data.BindingExpression.Activate（object item）+ 0x194 bytes 
 PresentationFramework.dll！System.Windows.Data.BindingExpression.AttachToContext（System.Windows.Data.BindingExpression.AttachAttempt尝试）+ 0x38d字节
 PresentationFramework.dll！System.Windo ws.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext（bool lastChance）+ 0x19 bytes 
 PresentationFramework.dll！MS.Internal.Data.DataBindEngine.Task.Run（bool lastChance）+ 0x31 bytes 
 PresentationFramework.dll！MS.Internal.Data.DataBindEngine.Run（object arg）+ 0xb6 bytes 
 WindowsBase.dll！System.Windows.Threading.ExceptionWrapper.InternalRealCall（System.Delegate callback，object args，int numArgs ）+ 0x53字节
 WindowsBase.dll！MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen（对象源，System.Delegate方法，对象args，int numArgs，System.Delegate catchHandler）+ 0x42字节
 WindowsBase。 dll！System.Windows.Threading.DispatcherOperation.InvokeImpl（）+ 0x8d bytes 
 WindowsBase.dll！System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext（object state）+ 0x38 bytes 
 mscorlib.dll！System。 Threading.ExecutionContext.runTryCode（object userData）+ 0x51 bytes 
 [本机到托管转换] 
 [管理到本机过渡] 
 mscorlib.dll！System.Threading.ExecutionContext.RunInternal（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback回调，对象状态）+ 0x6a字节
 mscorlib.dll！ System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state，bool ignoreSyncCtx）+ 0x7e bytes 
 mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading .ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x2c bytes 
 WindowsBase.dll！System.Windows.Threading.DispatcherOperation.Invoke（）+ 0x68 bytes 
 WindowsBase.dll！System.Windows .Threading.Dispatcher.ProcessQueue（）+ 0x15e bytes 
 WindowsBase.dll！System.Windows.Threading.Dispatcher.WndProcHook（System.IntPtr hwnd，int msg，System.IntPtr wParam，System.IntPtr lParam，ref bool handling ）+ 0x63字节
 WindowsBase.dll！MS.Win32.HwndWrapp er.WndProc（System.IntPtr hwnd，int msg，System.IntPtr wParam，System.IntPtr lParam，引用bool处理）+ 0xbe bytes 
 WindowsBase.dll！MS.Win32.HwndSubclass.DispatcherCallbackOperation（object o）+ 0x7d字节
 WindowsBase.dll！System.Windows.Threading.ExceptionWrapper.InternalRealCall（System.Delegate callback，object args，int numArgs）+ 0x53 bytes 
 WindowsBase.dll！MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen （对象源，System.Delegate方法，对象args，int numArgs，System.Delegate catchHandler）+ 0x42字节
 WindowsBase.dll！System.Windows.Threading.Dispatcher.InvokeImpl（System.Windows.Threading.DispatcherPriority priority， System.TimeSpan timeout，System.Delegate方法，对象args，int numArgs）+ 0xb4 bytes 
 WindowsBase.dll！MS.Win32.HwndSubclass.SubclassWndProc（System.IntPtr hwnd，int msg，System.IntPtr wParam，System。 IntPtr lParam）+ 0x104字节
 [本机管理转换] 
 [管理到本地转换] 
 Wi ndowsBase.dll！System.Windows.Threading.Dispatcher.PushFrameImpl（System.Windows.Threading.DispatcherFrame框架）+ 0xc1个字节
 WindowsBase.dll！System.Windows.Threading.Dispatcher.PushFrame（System.Windows.Threading。 DispatcherFrame框架）+ 0x49字节
 PresentationFramework.dll！System.Windows.Application.RunDispatcher（对象忽略）+ 0x5b字节
 PresentationFramework.dll！System.Windows.Application.RunInternal（System.Windows.Window窗口）+ 0x74 bytes 
 PresentationFramework.dll！System.Windows.Application.Run（System.Windows.Window window）+ 0x2b bytes 
 PresentationFramework.dll！System.Windows.Application.Run（）+ 0x1b bytes 
 Namespace.App.Main（）+ 0x5e bytes C＃
 [本机到托管转换] 
 [管理到本地转换] 
 mscorlib.dll！System.AppDomain.nExecuteAssembly（系统.Reflection.RuntimeAssembly assembly，string [] args）+ 0x9 bytes 
 mscorlib.dll！System.Runtime.Hosting.ManifestRunner.Run（bool checkAptModel）+ 0x6e bytes 
 mscorlib.dll！System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly（）+ 0x90 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）+ 0xd bytes 
 mscorlib.dll！System.Activator.CreateInstance（System.ActivationContext activationContext）+ 0x44 bytes 
 Microsoft.VisualStudio.HostingProcess.Utilities.dll！Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone（）+ 0x23 bytes 
 mscorlib.dll！System.Threading.ThreadHelper.ThreadStart_Context（对象状态）+ 0x63字节
 mscorlib.dll！System.Threading.ExecutionContext.Run（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state，bool ignoreSyncCtx）+ 0xb0 bytes 
 mscorlib.dll！System.Threading.ExecutionContext .R un（System.Threading.ExecutionContext executionContext，System.Threading.ContextCallback callback，object state）+ 0x2c bytes 
 mscorlib.dll！System.Threading.ThreadHelper.ThreadStart（）+ 0x44 bytes 
 [Native to Managed转换] 
  

解决方案

使用 Dispatcher 排队打印作业，稍后 DispatcherPriority 比 DataBind 。这样，打印作业之前，您的数据绑定将被处理。

  Dispatcher.BeginInvoke（DispatcherPriority.Loaded，
 new Action（delegate（）{printDlg.PrintVisual（control，My App）;}））; 
  

I am developing a point of sale application using wpf/mvvm. There will be receipts printed in the background during many parts of the transaction lifecycle. I have used other examples to generate and print receipts just fine in the background. I am printing a UserControl in the background, and everything looks great.

I then created the ViewModel for the control, so it can load up a transaction to print. I started with 2 basic textboxes - a Text header "Client Receipt", and top header "Printed On: MM/dd/yy hh:mm tt".

This is how the debugger is showing the lifecycle when I push a print button:

• Creates new instance of control.
• Creates new instance of ViewModel
• Sets the text for the INPC properties
• Runs a measure on the Control to get the desired pre-print size
• Loads the print dialog & retrieves the names print queue
• Scales the control's size to fit the receipt paper (should not have to scale for my currently selected printer, as the ImageArea width is set the same as my UC)
• Re-measures and Arranges the grid based on the "new" scaled image size
• calls PrintDialog.PrintVisual - sending the UserControl
• Printer spits out the receipt - with no databound text
• Then, my debugger steps into the get { return _HeaderText; } part of the code - after the control has already been printed.

Is there a way to force the databinding of the control before it gets sent to the printer without having to load the control in a panel and make it visible? I want to be able to for example, swipe the credit card and have it print the receipt with the signature line in the background, from a small popup window that asks for the CC Details (or swipe).

Is there a better way to achieve this?

PrintReceipt method:

ClientReceiptView control = new ClientReceiptView(Message);       
System.Windows.Controls.PrintDialog printDlg = new System.Windows.Controls.PrintDialog();
PrintQueue ReceiptPrinter = new LocalPrintServer().GetPrintQueue("CITIZEN CT-S310");
PrintCapabilities PC = ReceiptPrinter.GetPrintCapabilities();
printDlg.PrintQueue = ReceiptPrinter;
control.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
Size PreGridSize = control.DesiredSize;
double Scale = Math.Min(PC.PageImageableArea.ExtentWidth / PreGridSize.Width, PC.PageImageableArea.ExtentHeight / PreGridSize.Height);
control.LayoutTransform = new System.Windows.Media.ScaleTransform(Scale, Scale);
Size PaperSize = new Size(PC.PageImageableArea.ExtentWidth, Math.Min(PC.PageImageableArea.ExtentHeight, PreGridSize.Height));
control.Measure(PaperSize);
Point ptGrid = new Point(PC.PageImageableArea.OriginWidth, PC.PageImageableArea.OriginHeight);
control.Arrange(new Rect(ptGrid, PaperSize));
printDlg.PrintVisual(control, "My App");

And the View Constructor (with arguments)

public ClientReceiptView(string Header)
{
    InitializeComponent();
    vm = new ClientReceiptViewModel(Header);
    this.DataContext = vm;
}

And the ViewModel:

public class ClientReceiptViewModel : ViewModelBase
{
    #region Properties

    private string _HeaderText;

    public string HeaderText
    {
        get { return _HeaderText; }
        set { _HeaderText = value; OnPropertyChanged("HeaderText"); }
    }

    private int _TripID;

    public int TripID
    {
        get { return _TripID; }
        set { _TripID = value; OnPropertyChanged("TripID"); }
    }

    private string _PrintedOn;

    public string PrintedOn
    {
        get { return _PrintedOn; }
        set { _PrintedOn = value; OnPropertyChanged("PrintedOn"); }
    }

    #endregion

    public ClientReceiptViewModel(string Header)
    {
        HeaderText = Header;
        TripID = 2220013;
        PrintedOn = "Printed: " + DateTime.Now.ToString("MM/dd/yy hh:mm tt");
    }
}

Edit: Call Stack from Binding/Creation with a break on OnPropertyChanged("HeaderText"):

Namespace.Main.POS.Receipts.ClientReceiptViewModel.PrintedOn.set(string value) Line 38  C#
Namespace.Main.POS.Receipts.ClientReceiptViewModel.SetData(string Header) Line 79 + 0x4f bytes  C#
Namespace.Main.POS.Receipts.ClientReceiptView.ClientReceiptView(string Header) Line 28 + 0x13 bytes C#
Namespace.Main.POS.Receipts.PrintReceipt.PrintClientReceipt(string Message) Line 12 + 0x1e bytes    C#
Namespace.Main.MainWindowView.button1_Click(object sender, System.Windows.RoutedEventArgs e) Line 23 + 0xb bytes    C#
PresentationCore.dll!System.Windows.RoutedEventHandlerInfo.InvokeHandler(object target, System.Windows.RoutedEventArgs routedEventArgs) + 0x78 bytes    
PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) + 0xbe bytes   
PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) + 0x79 bytes  
PresentationCore.dll!System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs e) + 0x17 bytes 
PresentationFramework.dll!System.Windows.Controls.Primitives.ButtonBase.OnClick() + 0x4b bytes  
PresentationFramework.dll!System.Windows.Controls.Button.OnClick() + 0x4d bytes 
PresentationFramework.dll!System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(System.Windows.Input.MouseButtonEventArgs e) + 0x9e bytes   
PresentationCore.dll!System.Windows.UIElement.OnMouseLeftButtonUpThunk(object sender, System.Windows.Input.MouseButtonEventArgs e) + 0x6c bytes 
PresentationCore.dll!System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate genericHandler, object genericTarget) + 0x31 bytes    
PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) + 0x29 bytes  
PresentationCore.dll!System.Windows.RoutedEventHandlerInfo.InvokeHandler(object target, System.Windows.RoutedEventArgs routedEventArgs) + 0x3e bytes    
PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) + 0xbe bytes   
PresentationCore.dll!System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args, System.Windows.RoutedEvent newEvent) + 0x114 bytes    
PresentationCore.dll!System.Windows.UIElement.OnMouseUpThunk(object sender, System.Windows.Input.MouseButtonEventArgs e) + 0xc5 bytes   
PresentationCore.dll!System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate genericHandler, object genericTarget) + 0x31 bytes    
PresentationCore.dll!System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate handler, object target) + 0x29 bytes  
PresentationCore.dll!System.Windows.RoutedEventHandlerInfo.InvokeHandler(object target, System.Windows.RoutedEventArgs routedEventArgs) + 0x3e bytes    
PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) + 0xbe bytes   
PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) + 0x79 bytes  
PresentationCore.dll!System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs args) + 0x41 bytes   
PresentationCore.dll!System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs args, bool trusted) + 0x2c bytes    
PresentationCore.dll!System.Windows.Input.InputManager.ProcessStagingArea() + 0x1ff bytes   
PresentationCore.dll!System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs input) + 0x45 bytes 
PresentationCore.dll!System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport inputReport) + 0x62 bytes  
PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.ReportInput(System.IntPtr hwnd, System.Windows.Input.InputMode mode, int timestamp, System.Windows.Input.RawMouseActions actions, int x, int y, int wheel) + 0x2c2 bytes 
PresentationCore.dll!System.Windows.Interop.HwndMouseInputProvider.FilterMessage(System.IntPtr hwnd, MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) + 0x67d bytes 
PresentationCore.dll!System.Windows.Interop.HwndSource.InputFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) + 0x75 bytes   
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) + 0xbe bytes    
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) + 0x7d bytes    
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) + 0x53 bytes 
WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source, System.Delegate method, object args, int numArgs, System.Delegate catchHandler) + 0x42 bytes    
WindowsBase.dll!System.Windows.Threading.Dispatcher.InvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) + 0xb4 bytes    
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) + 0x104 bytes    
[Native to Managed Transition]  
[Managed to Native Transition]  
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) + 0xc1 bytes  
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) + 0x49 bytes  
PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) + 0x5b bytes  
PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) + 0x74 bytes 
PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) + 0x2b bytes 
PresentationFramework.dll!System.Windows.Application.Run() + 0x1b bytes 
Namespace.App.Main() + 0x5e bytes   C#
[Native to Managed Transition]  
[Managed to Native Transition]  
mscorlib.dll!System.AppDomain.nExecuteAssembly(System.Reflection.RuntimeAssembly assembly, string[] args) + 0x9 bytes   
mscorlib.dll!System.Runtime.Hosting.ManifestRunner.Run(bool checkAptModel) + 0x6e bytes 
mscorlib.dll!System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly() + 0x90 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) + 0xd bytes 
mscorlib.dll!System.Activator.CreateInstance(System.ActivationContext activationContext) + 0x44 bytes   
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() + 0x23 bytes   
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x63 bytes   
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0xb0 bytes    
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x2c bytes    
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes   
[Native to Managed Transition]  

Then after printDlg.PrintVisual(control, "My App"); is issued, the receipt prints out and then the call stack on the Breakpoint for get { return _PrintedOn; }:

Namespace.Main.POS.Receipts.ClientReceiptViewModel.PrintedOn.get() Line 37  C#
[Native to Managed Transition]  
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.GetValue(object item, int level) + 0x108 bytes    
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.RawValue(int k) + 0x4a bytes  
PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.RawValue() + 0x12 bytes   
PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.RawValue() + 0x11 bytes 
PresentationFramework.dll!System.Windows.Data.BindingExpression.TransferValue(object newValue, bool isASubPropertyChange) + 0xa7 bytes  
PresentationFramework.dll!System.Windows.Data.BindingExpression.Activate(object item) + 0x194 bytes 
PresentationFramework.dll!System.Windows.Data.BindingExpression.AttachToContext(System.Windows.Data.BindingExpression.AttachAttempt attempt) + 0x38d bytes  
PresentationFramework.dll!System.Windows.Data.BindingExpression.MS.Internal.Data.IDataBindEngineClient.AttachToContext(bool lastChance) + 0x19 bytes    
PresentationFramework.dll!MS.Internal.Data.DataBindEngine.Task.Run(bool lastChance) + 0x31 bytes    
PresentationFramework.dll!MS.Internal.Data.DataBindEngine.Run(object arg) + 0xb6 bytes  
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) + 0x53 bytes 
WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source, System.Delegate method, object args, int numArgs, System.Delegate catchHandler) + 0x42 bytes    
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeImpl() + 0x8d bytes  
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(object state) + 0x38 bytes 
mscorlib.dll!System.Threading.ExecutionContext.runTryCode(object userData) + 0x51 bytes 
[Native to Managed Transition]  
[Managed to Native Transition]  
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x6a bytes    
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0x7e bytes    
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x2c bytes    
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.Invoke() + 0x68 bytes  
WindowsBase.dll!System.Windows.Threading.Dispatcher.ProcessQueue() + 0x15e bytes    
WindowsBase.dll!System.Windows.Threading.Dispatcher.WndProcHook(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) + 0x63 bytes 
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) + 0xbe bytes    
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) + 0x7d bytes    
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) + 0x53 bytes 
WindowsBase.dll!MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(object source, System.Delegate method, object args, int numArgs, System.Delegate catchHandler) + 0x42 bytes    
WindowsBase.dll!System.Windows.Threading.Dispatcher.InvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) + 0xb4 bytes    
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) + 0x104 bytes    
[Native to Managed Transition]  
[Managed to Native Transition]  
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) + 0xc1 bytes  
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) + 0x49 bytes  
PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) + 0x5b bytes  
PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) + 0x74 bytes 
PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) + 0x2b bytes 
PresentationFramework.dll!System.Windows.Application.Run() + 0x1b bytes 
Namespace.App.Main() + 0x5e bytes   C#
[Native to Managed Transition]  
[Managed to Native Transition]  
mscorlib.dll!System.AppDomain.nExecuteAssembly(System.Reflection.RuntimeAssembly assembly, string[] args) + 0x9 bytes   
mscorlib.dll!System.Runtime.Hosting.ManifestRunner.Run(bool checkAptModel) + 0x6e bytes 
mscorlib.dll!System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly() + 0x90 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) + 0xd bytes 
mscorlib.dll!System.Activator.CreateInstance(System.ActivationContext activationContext) + 0x44 bytes   
Microsoft.VisualStudio.HostingProcess.Utilities.dll!Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone() + 0x23 bytes   
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) + 0x63 bytes   
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool ignoreSyncCtx) + 0xb0 bytes    
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) + 0x2c bytes    
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() + 0x44 bytes   
[Native to Managed Transition]  

解决方案

Use the Dispatcher to queue the print job at a later DispatcherPriority than DataBind. This way all your databinding gets processed before the print job does.

Dispatcher.BeginInvoke(DispatcherPriority.Loaded,
    new Action(delegate() { printDlg.PrintVisual(control, "My App"); } ));

这篇关于WPF MVVM背景打印数据绑定问题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！