代码之家 › 专栏 › 技术社区 › Derek Meyer

将rtf字符串加载到TextRange中不包括换行符

memorystream rtf c#

Derek Meyer · 技术社区 · 7 年前

我有一个方法可以设置文本范围from和rtf字符串。我的问题是,当将其加载到TextRange时,它会丢失换行符。当我从内存流加载rtf字符串时,如何确保换行符存在?目前我的方法如下:

    public static void LoadRtf(string rtf, TextRange range)
    {
        if (string.IsNullOrEmpty(rtf))
            return;

        using (MemoryStream rtfMemoryStream = new MemoryStream())
        {
            using (StreamWriter rtfStreamWriter = new StreamWriter(rtfMemoryStream))
            {
                rtfStreamWriter.Write(rtf);
                rtfStreamWriter.Flush();
                rtfMemoryStream.Seek(0, SeekOrigin.Begin);

                range.Load(rtfMemoryStream, DataFormats.Rtf);
            }
        }
    }

扩展RichTextBox的调用类

public class RtfBox : RichTextBox
{
    public object RtfContent
    {
        get { return GetValue(RtfContentProperty); }
        set { SetValue(RtfContentProperty, value); }
    }

    public static readonly DependencyProperty RtfContentProperty =
        DependencyProperty.RegisterAttached("RtfContent", typeof(object), typeof(RtfBox),
                                            new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender, RtfContentChanged));

    static void RtfContentChanged(DependencyObject depObj, DependencyPropertyChangedEventArgs evt)
    {
        RtfBox box = depObj as RtfBox;
        if (box == null)
            return;

        string sContent = evt.NewValue as string;
        if (sContent == null)
        {
            byte[] bContent = evt.NewValue as byte[];
            if (bContent != null)
                sContent = Encoding.UTF8.GetString(bContent);
        }

        box.Document.Blocks.Clear();

        try
        {
            TextRange range = new TextRange(box.Document.ContentStart, box.Document.ContentEnd);
            FlowDocumentRtfConverter.LoadRtf(sContent, range);

            if (box.Document.FontStyle == FontStyles.Normal)
                box.Document.FontStyle = box.FontStyle;
            if (box.Document.FontWeight == FontWeights.Normal)
                box.Document.FontWeight = box.FontWeight;
            if (box.Document.FontStretch == FontStretches.Normal)
                box.Document.FontStretch = box.FontStretch;

        }
        catch (Exception e)
        {
        }
    }

    public RtfBox()
        : base()
    {
        IsDocumentEnabled = false;
    }
}

我当前使用的rtf字符串值是“H\0e\0l\0l\0o\0\r\0\n\02\0n\0d\0\0l\0i\0n\0e\0\r\0” 也许这有什么问题?

2 回复 | 直到 7 年前

Kevin 7 年前

我尝试了您的代码,只做了如下轻微的修改,它对我起到了作用。也许这就是你初始化文本范围的方式?

        public static string LoadRtf(string rtf, TextRange range)
        {
            if (string.IsNullOrEmpty(rtf))
                return "";

            using (MemoryStream rtfMemoryStream = new MemoryStream())
            {
                using (StreamWriter rtfStreamWriter = new StreamWriter(rtfMemoryStream))
                {
                    rtfStreamWriter.Write(rtf);
                    rtfStreamWriter.Flush();
                    rtfMemoryStream.Seek(0, SeekOrigin.Begin);

                    range.Load(rtfMemoryStream, DataFormats.Rtf);
                }
            }

            return range.Text;
        }

然后我调用了这段代码,返回的字符串有换行符,并在富文本框控件中正确显示。

string rtf = File.ReadAllText(@"c:\temp\document.rtf");

FlowDocument flowDocument = new FlowDocument();
TextRange range = new TextRange(flowDocument.ContentStart, flowDocument.ContentEnd);

this.richTextBox1.Text = LoadRtf(rtf, range);

Derek Meyer 7 年前

我改变了范围。加载以使用数据格式。文本,现在考虑换行符。