TextRange.CanLoad(String) Método
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Comprueba si se puede cargar la selección actual con contenido en un formato de datos especificado.
public:
bool CanLoad(System::String ^ dataFormat);public bool CanLoad (string dataFormat);member this.CanLoad : string -> boolPublic Function CanLoad (dataFormat As String) As Boolean- dataFormat
- String
Formato de datos para comprobar la compatibilidad de carga en la selección actual. Vea DataFormats para obtener una lista de formatos de datos predefinidos.
true si se puede cargar la selección actual con contenido en el formato de datos especificado; de lo contrario, false.
En el siguiente ejemplo se muestra el uso del método CanLoad.
// This method accepts an input stream and a corresponding data format. The method
// will attempt to load the input stream into a TextRange selection, apply Bold formatting
// to the selection, save the reformatted selection to an alternat stream, and return
// the reformatted stream.
Stream BoldFormatStream(Stream inputStream, string dataFormat)
{
// A text container to read the stream into.
FlowDocument workDoc = new FlowDocument();
TextRange selection = new TextRange(workDoc.ContentStart, workDoc.ContentEnd);
Stream outputStream = new MemoryStream();
try
{
// Check for a valid data format, and then attempt to load the input stream
// into the current selection. Note that CanLoad ONLY checks whether dataFormat
// is a currently supported data format for loading a TextRange. It does not
// verify that the stream actually contains the specified format. An exception
// may be raised when there is a mismatch between the specified data format and
// the data in the stream.
if (selection.CanLoad(dataFormat))
selection.Load(inputStream, dataFormat);
}
catch (Exception e) { return outputStream; /* Load failure; return a null stream. */ }
// Apply Bold formatting to the selection, if it is not empty.
if (!selection.IsEmpty)
selection.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold);
// Save the formatted selection to a stream, and return the stream.
if (selection.CanSave(dataFormat))
selection.Save(outputStream, dataFormat);
return outputStream;
}
' This method accepts an input stream and a corresponding data format. The method
' will attempt to load the input stream into a TextRange selection, apply Bold formatting
' to the selection, save the reformatted selection to an alternat stream, and return
' the reformatted stream.
Private Function BoldFormatStream(ByVal inputStream As Stream, ByVal dataFormat As String) As Stream
' A text container to read the stream into.
Dim workDoc As New FlowDocument()
Dim selection As New TextRange(workDoc.ContentStart, workDoc.ContentEnd)
Dim outputStream As Stream = New MemoryStream()
Try
' Check for a valid data format, and then attempt to load the input stream
' into the current selection. Note that CanLoad ONLY checks whether dataFormat
' is a currently supported data format for loading a TextRange. It does not
' verify that the stream actually contains the specified format. An exception
' may be raised when there is a mismatch between the specified data format and
' the data in the stream.
If selection.CanLoad(dataFormat) Then
selection.Load(inputStream, dataFormat)
End If
Catch e As Exception ' Load failure return a null stream.
Return outputStream
End Try
' Apply Bold formatting to the selection, if it is not empty.
If Not selection.IsEmpty Then
selection.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold)
End If
' Save the formatted selection to a stream, and return the stream.
If selection.CanSave(dataFormat) Then
selection.Save(outputStream, dataFormat)
End If
Return outputStream
End Function
Use el método correspondiente Load para cargar realmente el contenido en la selección actual en un formato de datos especificado.
| Producto | Versiones |
|---|---|
| .NET Framework | 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7 |