TextRange.Save 方法

public:
 void Save(System::IO::Stream ^ stream, System::String ^ dataFormat);

public void Save(System.IO.Stream stream, string dataFormat);

member this.Save : System.IO.Stream * string -> unit

Public Sub Save (stream As Stream, dataFormat As String)

參數

例外狀況

範例

下列範例示範 Save 方法的用法。

// 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

備註

當此方法返回時，會 stream 保持開啟，且目前 stream 位置尚未定義。

作為儲存操作的一部分，當前選取中的內容可能會轉換成由 dataFormatS 指定的資料格式。

另請參閱

• CanSave(String)
• Load(Stream, String)
• CanLoad(String)

public:
 void Save(System::IO::Stream ^ stream, System::String ^ dataFormat, bool preserveTextElements);

public void Save(System.IO.Stream stream, string dataFormat, bool preserveTextElements);

member this.Save : System.IO.Stream * string * bool -> unit

Public Sub Save (stream As Stream, dataFormat As String, preserveTextElements As Boolean)

參數

例外狀況

備註

當 preserveTextElements 為 false時，自訂 TextElement 物件會被儲存為已知 TextElement 型別。 例如，假設你建立一個名為 的自訂TextElement，繼承自 Heading1。Paragraph 當你將此方法設定為 時，當 被儲存時，該方法preserveTextElements會轉換成 a falseHeading1。 ParagraphTextRange 當你將此方法 preserveTextElements 設定為 true時 Heading1 ，會儲存而未被轉換。 為保留自訂文字元素， dataFormat 必須將 設為 DataFormats.Xaml。

Save(Stream, String, Boolean) 於 .NET Framework 3.5 版本中引入。 欲了解更多資訊，請參閱 版本與相依關係。