Proprietà AnalysisWarning.BackgroundException
Aggiornamento: novembre 2007
Eccezione Exception che viene generata se si verifica un'eccezione durante l'analisi in background dell'input penna.
Spazio dei nomi: Microsoft.Ink
Assembly: Microsoft.Ink.Analysis (in Microsoft.Ink.Analysis.dll)
Sintassi
'Dichiarazione
Public ReadOnly Property BackgroundException As Exception
'Utilizzo
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
Valore proprietà
Tipo: System.Exception
Eccezione Exception che viene generata durante l'analisi in background.
Note
Se si verifica un'eccezione Exception dopo una chiamata a InkAnalyzerBase.BackgroundAnalyze, l'eccezione non può essere generata perché si sta verificando in un thread diverso e non vi sarebbe modo per rilevarla. Nel gestore dell'evento ResultsUpdated, invece, la proprietà Status dell'oggetto ResultsUpdatedEventArgs disporrà di un oggetto AnalysisWarning di tipo BackgroundException nell'insieme Warnings. La proprietà BackgroundException di questo oggetto AnalysisWarning conterrà l'eccezione Exception generata durante l'analisi in background. In generale, si preferisce rigenerare questa eccezione Exception in modo che possa essere rilevata altrove nell'applicazione. Da questo punto l'analizzatore dell'input penna è inutilizzabile ed è necessario crearne una nuova istanza.
Esempi
Nell'esempio seguente viene illustrato un oggetto AnalysisWarning, warning che viene controllato per verificare se è associato a eventuali suggerimenti. Se AnalysisWarning è di tipo BackgroundException, è necessario tentare di salvare il più possibile dello stato del documento, quindi rigenerare l'eccezione in modo che possa essere rilevata da un gestore di eccezioni. Se non è disponibile alcun gestore di eccezioni, è possibile richiamare un debugger di errori di programma, ad esempio Dr. Watson. InkAnalyzer dovrà essere reinizializzato dopo il rilevamento dell'eccezione.
' 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;
}
Piattaforme
Windows Vista
.NET Framework e .NET Compact Framework non supportano tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema di .NET Framework.
Informazioni sulla versione
.NET Framework
Supportato in: 3.0