AnalysisWarning.BackgroundException-Eigenschaft
Die Exception, die bei einer Ausnahme während der Hintergrundanalyse von Freihand ausgelöst wird.
Namespace: Microsoft.Ink
Assembly: Microsoft.Ink.Analysis (in Microsoft.Ink.Analysis.dll)
Syntax
'Declaration
Public ReadOnly Property BackgroundException As Exception
'Usage
Dim instance As AnalysisWarning
Dim value As Exception
value = instance.BackgroundException
public Exception BackgroundException { get; }
public:
property Exception^ BackgroundException {
Exception^ get ();
}
/** @property */
public Exception get_BackgroundException()
public function get BackgroundException () : Exception
Eigenschaftenwert
Typ: System.Exception
Die Exception, die während der Hintergrundanalyse ausgelöst wurde.
Hinweise
Wenn nach einem Aufruf von InkAnalyzerBase.BackgroundAnalyze eine Exception-Ausnahme auftritt, kann sie nicht ausgelöst werden, da sie in einem anderen Thread auftritt und nicht abgefangen werden könnte. Im ResultsUpdated-Ereignishandler gibt es stattdessen in der Status-Eigenschaft des ResultsUpdatedEventArgs-Objekts ein AnalysisWarning-Objekt vom Typ BackgroundException in der Warnings-Auflistung. Die BackgroundException-Eigenschaft dieses AnalysisWarning-Objekts enthält dann die Exception, die während der Hintergrundanalyse ausgelöst wurde. Im Allgemeinen ist es dann nützlich, diese Exception erneut auszulösen, damit sie an einer anderen Stelle der Anwendung abgefangen werden kann. Von diesem Zeitpunkt an ist das Freihandanalysemodul unbrauchbar, und es muss neu instanziiert werden.
Beispiele
Im folgenden Beispiel wird ein AnalysisWarning-Objekt (warning) gezeigt, das auf zugeordnete Hinweise überprüft wird. Wenn das AnalysisWarning-Objekt vom Typ BackgroundException ist, sollten Sie versuchen, den Dokumentzustand so weit wie möglich zu speichern, und die Ausnahme dann erneut auszulösen, damit sie von einem Ausnahmehandler abgefangen werden kann. Auch wenn kein Ausnahmehandler vorhanden ist, kann ein Programmfehlerdebugger wie beispielsweise Dr. Watson aufgerufen werden. Das InkAnalyzer-Objekt muss nach dem Abfangen der Ausnahme neu initialisiert werden.
' Loop through warnings
Dim warning As AnalysisWarning
For Each warning In status.Warnings
Select Case warning.WarningCode
Case Microsoft.Ink.AnalysisWarningCode.Aborted
message = message & "Analysis operation was aborted. "
Case Microsoft.Ink.AnalysisWarningCode.BackgroundException
' This is a fatal warning. Throw an exception.
' First, attempt to save as much document state as possible
' ...
' Rethrow the exception so that it can be caught by an exception
' handler (or if there is no exception handler, a program error
' debugger such as Dr. Watson can be invoked)
Throw (warning.BackgroundException)
Case Microsoft.Ink.AnalysisWarningCode.ConfirmedWithoutInkRecognition
message = message & "Node was confirmed without ink recognition having been performed. "
Case Microsoft.Ink.AnalysisWarningCode.ContextNodeLocationNotSet
message = message & "Node does not have a proper location set. "
Case Microsoft.Ink.AnalysisWarningCode.FactoidCoercionNotSupported
message = message & "Factoid coercion failed "
If (Not warning.AnalysisHint Is Nothing) AndAlso (Not warning.AnalysisHint.Factoid Is Nothing) Then
message = message & "for factoid: " & warning.AnalysisHint.Factoid & ". "
End If
Case Microsoft.Ink.AnalysisWarningCode.FactoidNotSupported
If (Not warning.AnalysisHint Is Nothing) AndAlso (Not warning.AnalysisHint.Factoid Is Nothing) Then
message = message & warning.AnalysisHint.Factoid & " factoid was not respected. "
End If
Case Microsoft.Ink.AnalysisWarningCode.GuideNotSupported
message = message & "Guide was not respected. "
Case Microsoft.Ink.AnalysisWarningCode.AddInkToRecognizerFailed
message = message & "Ink could not be added to the InkRecognizer. "
Case Microsoft.Ink.AnalysisWarningCode.InkRecognizerInitializationFailed
message = message & "The InkRecognizer failed to initialize. "
Case Microsoft.Ink.AnalysisWarningCode.NoMatchingInkRecognizerFound
message = message & "There are no ink recognizers meeting the language or capabilities needed. "
Case Microsoft.Ink.AnalysisWarningCode.LanguageIdNotRespected
message = message & "The language ID set on a stroke did not match the language ID of the InkRecognizer. "
Case Microsoft.Ink.AnalysisWarningCode.PartialDictionaryTermsNotSupported
message = message & "Partial dictionary terms could not be returned from the text recognizer. "
Case Microsoft.Ink.AnalysisWarningCode.TextRecognitionProcessFailed
message = message & "The text recognition process failed. "
Case Microsoft.Ink.AnalysisWarningCode.SetPrefixSuffixFailed
message = message & "The text recognizer was unable to respect either the prefix or suffix. "
If (Not warning.AnalysisHint Is Nothing) AndAlso (Not warning.AnalysisHint.PrefixText Is Nothing) Then
message = message & "Prefix: " & warning.AnalysisHint.PrefixText & ". "
End If
If (Not warning.AnalysisHint Is Nothing) AndAlso (Not warning.AnalysisHint.SuffixText Is Nothing) Then
message = message & "Suffix: " & warning.AnalysisHint.SuffixText & ". "
End If
Case Microsoft.Ink.AnalysisWarningCode.WordlistNotSupported
message = message & "Wordlist was not respected. "
Case Microsoft.Ink.AnalysisWarningCode.WordModeNotSupported
message = message & "Word mode was not respected. "
End Select
' Add node id information
Dim id As Guid
For Each id In warning.GetNodeIds()
message = message & "Id: " & id.ToString() & " "
Next id
' Add hint information
If Not (warning.AnalysisHint Is Nothing) Then
Dim hint As AnalysisHintNode = warning.AnalysisHint
message = message & Environment.NewLine & "Hint information: "
message = message & "AllowPartialDictionaryTerms"
If hint.AllowPartialDictionaryTerms = True Then
message = message & " = True "
Else
message = message & " = False "
End If
message = message & "CoerceToFactoid"
If hint.CoerceToFactoid = True Then
message = message & " = True "
Else
message = message & " = False "
End If
If Not hint.Factoid Is Nothing Then
message = message & "Factoid = " & warning.AnalysisHint.Factoid & " "
End If
If hint.Guide.DrawnBox <> Rectangle.Empty Then
message = message & "Guide Drawn Box = " & hint.Guide.DrawnBox.ToString()
End If
If hint.Guide.WritingBox <> Rectangle.Empty Then
message = message & "Guide Writing Box = " & hint.Guide.WritingBox.ToString()
End If
message = message & String.Format("Guide = ({0}, {1})", _
hint.Guide.Columns, hint.Guide.Rows)
If Not hint.Name Is Nothing Then
message = message & "Name = " & warning.AnalysisHint.Name & " "
End If
If Not hint.PrefixText Is Nothing Then
message = message & "PrefixText = " & warning.AnalysisHint.PrefixText & " "
End If
If Not hint.SuffixText Is Nothing Then
message = message & "SuffixText = " & warning.AnalysisHint.SuffixText & " "
End If
message = message & "WordMode"
If hint.WordMode = True Then
message = message & " = True"
Else
message = message & " = False"
End If
End If
message = message & Environment.NewLine
Next warning
// Loop through warnings
foreach (AnalysisWarning warning in status.Warnings)
{
switch (warning.WarningCode)
{
case Microsoft.Ink.AnalysisWarningCode.Aborted:
message += "Analysis operation was aborted. ";
break;
case Microsoft.Ink.AnalysisWarningCode.BackgroundException:
// This is a fatal warning. Throw an exception.
// First, attempt to save as much doc state as possible
// ...
// Rethrow the exception so that it can be caught by an exception
// handler (or if there is no exception handler, a program error
// debugger such as Dr. Watson can be invoked)
throw(warning.BackgroundException);
case Microsoft.Ink.AnalysisWarningCode.ConfirmedWithoutInkRecognition:
message += "Node was confirmed without ink recognition having been performed. ";
break;
case Microsoft.Ink.AnalysisWarningCode.ContextNodeLocationNotSet:
message += "Node does not have a proper location set. ";
break;
case Microsoft.Ink.AnalysisWarningCode.FactoidCoercionNotSupported:
message += "Factoid coercion failed ";
if (warning.AnalysisHint != null && warning.AnalysisHint.Factoid != null)
{
message += "for factoid: " + warning.AnalysisHint.Factoid + ". ";
}
break;
case Microsoft.Ink.AnalysisWarningCode.FactoidNotSupported:
if (warning.AnalysisHint != null && warning.AnalysisHint.Factoid != null)
{
message += warning.AnalysisHint.Factoid + " factoid was not respected. ";
}
break;
case Microsoft.Ink.AnalysisWarningCode.GuideNotSupported:
message += "Guide was not respected. ";
break;
case Microsoft.Ink.AnalysisWarningCode.AddInkToRecognizerFailed:
message += "Ink could not be added to the InkRecognizer. ";
break;
case Microsoft.Ink.AnalysisWarningCode.InkRecognizerInitializationFailed:
message += "The InkRecognizer failed to initialize. ";
break;
case Microsoft.Ink.AnalysisWarningCode.NoMatchingInkRecognizerFound:
message += "There are no ink recognizers meeting the language or capabilities needed. ";
break;
case Microsoft.Ink.AnalysisWarningCode.LanguageIdNotRespected:
message += "The language ID set on a stroke did not match the language ID of the InkRecognizer. ";
break;
case Microsoft.Ink.AnalysisWarningCode.PartialDictionaryTermsNotSupported:
message += "Partial dictionary terms could not be returned from the text recognizer. ";
break;
case Microsoft.Ink.AnalysisWarningCode.TextRecognitionProcessFailed:
message += "The text recognition process failed. ";
break;
case Microsoft.Ink.AnalysisWarningCode.SetPrefixSuffixFailed:
message += "The text recognizer was unable to respect either the prefix or suffix. ";
if (warning.AnalysisHint != null && warning.AnalysisHint.PrefixText != null)
{
message += "Prefix: " + warning.AnalysisHint.PrefixText + ". ";
}
if (warning.AnalysisHint != null && warning.AnalysisHint.SuffixText != null)
{
message += "Suffix: " + warning.AnalysisHint.SuffixText + ". ";
}
break;
case Microsoft.Ink.AnalysisWarningCode.WordlistNotSupported:
message += "Wordlist was not respected. ";
break;
case Microsoft.Ink.AnalysisWarningCode.WordModeNotSupported:
message += "Word mode was not respected. ";
break;
}
// Add node id information
foreach (Guid id in warning.GetNodeIds())
message += "Id: " + id.ToString() + " ";
// Add hint information
if (warning.AnalysisHint != null)
{
AnalysisHintNode hint = warning.AnalysisHint;
message += Environment.NewLine + "Hint information: ";
message += "AllowPartialDictionaryTerms";
if (hint.AllowPartialDictionaryTerms)
message += " = true ";
else
message += " = false ";
message += "CoerceToFactoid";
if (hint.CoerceToFactoid)
message += " = true ";
else
message += " = false ";
if (hint.Factoid != null)
message += "Factoid = " + warning.AnalysisHint.Factoid + " ";
if (hint.Guide.DrawnBox != Rectangle.Empty)
message += "Guide Drawn Box = " + hint.Guide.DrawnBox.ToString();
if (hint.Guide.WritingBox != Rectangle.Empty)
message += "Guide Writing Box = " + hint.Guide.WritingBox.ToString();
if (hint.Name != null)
message += "Name = " + warning.AnalysisHint.Name + " ";
if (hint.PrefixText != null)
message += "PrefixText = " + warning.AnalysisHint.PrefixText + " ";
if (hint.SuffixText != null)
message += "SuffixText = " + warning.AnalysisHint.SuffixText + " ";
message += "WordMode";
if (hint.WordMode)
message += " = true";
else
message += " = false";
}
message += Environment.NewLine;
}
Plattformen
Windows Vista
.NET Framework und .NET Compact Framework unterstützen nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen für .NET Framework.
Versionsinformationen
.NET Framework
Unterstützt in: 3.0