Crystal 报告发送的对象引用未设置为对象的实例

Question

我正在使用 Crystal VS 和 WFP 报告查看 window 上的报告。一开始我遇到了这个错误：

System.ArgumentNullException -- System.ArgumentNullException: Value cannot be null.
Parameter name: window

然后我按照这个 solution.

修复了它

现在出现另一条模糊的消息，我无法找到解决方案，即使遵循 this:

System.NullReferenceException -- System.NullReferenceException: Object reference not set to an instance of an object.
   at SAPBusinessObjects.WPF.Viewer.ReportAlbum.RefreshReport()
   at SAPBusinessObjects.WPF.Viewer.CrystalReportsViewer.RefreshReport_Executed(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
   at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
   at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
   at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
   at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)
   at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(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 callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at Inspector_Reporter_MDK.App.Main() -- Object reference not set to an instance of an object.

我的报表没有任何字段，当然也没有我发送的参数。
所有文字都包含在页面大小中。

我设置报告打印的代码：

public void PrintReport()
{
    string reportPath = System.IO.Path.Combine(new System.IO.DirectoryInfo("reports").FullName, "taklif-tansik.rpt");
    //MessageBox.Show(reportPath);
    try
    {
        cryRpt = new ReportDocument();
        cryRpt.Load(reportPath);
        if (cryRpt.IsLoaded)
        {
            ReportPrintWindow = new ReportWindow();
            //cryRpt.Refresh();
            ReportPrintWindow.RptViewer.ViewerCore.ReportSource = cryRpt;
            ReportPrintWindow.Show();
        }
    }
    catch (Exception exEngineException)
    {
        MessageBox.Show("exEngineException " + exEngineException.ToString());
    }
}

Crystal 的 XAML 报告查看者：

<metro:MetroWindow 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:syncfusion="http://schemas.syncfusion.com/wpf" x:Class="Inspector_Reporter_MDK.ReportWindow"
        xmlns:my="clr-namespace:SAPBusinessObjects.WPF.Viewer;assembly=SAPBusinessObjects.WPF.Viewer"
        xmlns:metro="http://metro.mahapps.com/winfx/xaml/controls"
        GlowBrush="{DynamicResource AccentColorBrush}"
        BorderThickness="1"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:loc="clr-namespace:Inspector_Reporter_MDK"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
        mc:Ignorable="d"Loaded="MetroWindow_Loaded" >
    <Grid >
        <my:CrystalReportsViewer x:Name="RptViewer" />
    </Grid>
</metro:MetroWindow>

Crystal 报告查看器的隐藏代码：

private void ReportWindow_Loaded(object sender, RoutedEventArgs e)
{
    try
    {
        RptViewer.Owner = this;
        //MessageBox.Show("RptViewer5");
    }
    catch (Exception exEngineException)
    {
        MessageBox.Show("RptViewer " + exEngineException.ToString());
    }
}

Answer 1

原来运行-time dll files of Crystal report between development machine and client machine caused this problem:

Memory full.
Not enough memory for operation.

第二个：

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

解法：

在客户端机器上安装与开发机器相同的版本。我安装的版本是 13.0.19，客户端机器是 13.0.12，通过卸载 13.0.12 并在客户端机器上安装 13.0.19，解决了我的问题。

最好也安装与您的 Visual Studio 版本相关的 Microsoft Visual C++ Redistributable。

Crystal 报告发送的对象引用未设置为对象的实例

Crystal Report sends Object reference not set to an instance of an object

c#

crystal-reports