基础.show() 抛出 InvalidOperationException

本文关键字:抛出 InvalidOperationException show 基础 | 更新日期: 2023-09-27 17:55:39

我在base上遇到了问题。Show() 抛出一个 InvalidOperationException。 这有几个问题:

  1. 仅当我在"调试 ->异常"菜单中显示"公共语言运行时异常"时,错误才会显示在 vs2012 中,但如果我在没有它的情况下运行它,则不会显示错误。
  2. 在 vs2012 之外运行程序时,将显示一个消息框,显示错误,堆栈跟踪显示在本文底部。
  3. 我试图研究在基地抛出的无效操作异常。Show() 在线,但未能成功找到与 base 相关的任何内容。具体来说就是显示()。

该程序正在做的是打开一个表单,当单击链接时,它会使用以下代码打开一个 DocViewer 窗口:

 private void paperVisionLink_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            AnalRunSeq sequence = (bob.Resources["AnalRunSeqsCollection"] as CollectionViewSource).View.CurrentItem as AnalRunSeq;
            if (sequence != null)
            {
                try
                {
                    var pveView = this.ShowCOCDocumentForWorkorder((sequence.Sample.WorkOrderID));
                }
                catch (Exception ex)
                {
                    ELI_Data.DataLogger.Logger.Error("Error starting papervision window", ex);
                }
            }
        }
        catch
        {
            MessageBox.Show("Cannot find COC document for that Work Order.");
        }
    }
    public Window ShowCOCDocumentForWorkorder(string workorder)
    {
        PaperVision pve = new PaperVision("bluser", "bluser");
        pve.SubmitSearchCriteria("WORK ORDER'tCATEGORY", workorder.ToUpper() + "'tCOC");
        XDocument response = pve.ExecuteQuery();
        XElement documentXml = response.Descendants("DOC").FirstOrDefault();
        PVEWindow pveView = null;
        if (!documentXml.IsNull())
        {
            pveView = new PVEWindow();
            pveView.Show(
                string.Format("{0}/HttpInterface.asp", EnergyDatabase.Setup.DocImaging.WebService),
                EnergyDatabase.Setup.DocImaging.EntityID.Value,
                pve.SessionID,
                EnergyDatabase.Setup.DocImaging.DocProjects.Single(dp => dp.Project == "LOGIN").ProjectID.Value,
                documentXml.Attribute("DOCID").Value);
        }
        return pveView;
    }

pveView.Show 方法是基础所在。Show() 方法正在抛出可执行文件:

public void Show(string url, int entityId, string sessionId, int projId, string docId)
    {
        try
        {
            base.Show();  //exception thrown here
            this.PvdmDocView.InitComm(url, entityId, sessionId, projId, docId);
        }
        catch (Exception ex)
        {
            Logger.Error("Error opening papervision viewer", ex);
            throw;
        }
    }

下面是程序在 Visual Studio 外部运行时引发的异常:

************** Exception Text **************
System.InvalidOperationException: Dispatcher processing has been suspended, but messages are still being processed.
at System.Windows.Threading.Dispatcher.WndProcHook(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, Boolean isSingleParameter)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)
at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter)
at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.UnsafeNativeMethods.CoCreateInstance(Guid& clsid, Object punkOuter, Int32 context, Guid& iid)
at System.Windows.Forms.AxHost.CreateWithoutLicense(Guid clsid)
at System.Windows.Forms.AxHost.CreateWithLicense(String license, Guid clsid)
at System.Windows.Forms.AxHost.CreateInstanceCore(Guid clsid)
at System.Windows.Forms.AxHost.CreateInstance()
at System.Windows.Forms.AxHost.GetOcxCreate()
at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state)
at System.Windows.Forms.AxHost.CreateHandle()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl()
at System.Windows.Forms.Control.WmShowWindow(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at System.Windows.Forms.ContainerControl.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

最奇怪的是,尽管抛出了此异常,但如果在显示消息框后尝试继续,则一切正常,因此我不确定如何解决此问题。 任何帮助将不胜感激!

编辑

我已经更新了上面的帖子以删除线程并将 ShowCOCDocumentForWorkorder 方法添加到主窗口类中。 这应该可以解决之前发生的线程问题。 现在发生的唯一应该更容易解决的问题是修复基础。Show() 方法引发 InvalidOperationException 错误。 中使用的类不允许使用 Invoke 方法,尽管我不确定为什么。以下是 PVEWindow 类的完整类代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
namespace Microbiology
{
    using System.Windows.Forms;
    /// <summary>
    /// Interaction logic for PVEWindow.xaml
    /// </summary>
    public partial class PVEWindow : Window
    {
        public PVEWindow()
        {
            this.InitializeComponent();
            base.Show();
        }
        public void Show(string url, int entityId, string sessionId, int projId, string docId)
        {
            //base.Show();
            try
            {
                this.PvdmDocView.InitComm(url, entityId, sessionId, projId, docId);
            }
            catch (Exception ex)
            {
                ELI_Data.DataLogger.Logger.Error("Error opening papervision viewer", ex);
                throw;
            }
        }
    }
}

基础.show() 抛出 InvalidOperationException

我能够通过在 base 之前将以下代码添加到 Show 方法来解决此问题。显示() 调用:

Application.SetUnhandledExceptionMode(UnhandledExceptionMode.ThrowException);