base.Show()抛出InvalidOperationException

时间:2015-06-11 20:19:09

标签: c# .net winforms show invalidoperationexception

我遇到了base.Show()抛出InvalidOperationException的问题。这有几个问题:

  1. 只有当我在调试中显示“公共语言运行时异常”时,才会在vs2012中显示错误 - >例外菜单,但如果我没有它,则不会。
  2. 在vs2012之外运行程序时,会显示一个消息框,显示此帖子底部显示的堆栈跟踪错误。
  3. 我试图研究在base.Show()上发布的InvalidOperationException,但是在找到与base.Show()相关的任何内容时都没有成功。
  4. 程序正在做的是打开一个表单,当单击一个链接时,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base.Show()方法抛出execption的地方:

    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;
            }
        }
    

    这是程序在visual studio之外运行时抛出的异常:

    ************** 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,虽然抛出了这个异常,如果你在显示消息框后尝试继续,一切都正常运行,所以我不知道如何解决这个问题。任何帮助将不胜感激!

    修改

    我已更新上述帖子以删除线程并将ShowCOCDocumentForWorkorder方法添加到主窗口类。这应该解决之前发生的线程问题。现在应该更容易解决的唯一问题是修复base.Show()方法抛出InvalidOperationException错误。使用的类不允许使用Invoke方法,虽然我不确定原因。 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;
                }
            }
        }
    }
    

1 个答案:

答案 0 :(得分:0)

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

Application.SetUnhandledExceptionMode(UnhandledExceptionMode.ThrowException);