创建RTF在flowdocument中运行

任何人都可以请帮我理解RTF吗？我有一个inputStream一些字符串创建RTF在flowdocument中运行

inputStream = new MemoryStream(Encoding.ASCII.GetBytes((myObject.someStr)));

充满那么这个流传递的FlowDocument

FlowDocument fldoc = new FlowDocument(); 
TextRange tr = new TextRange(
    fldoc.ContentStart, fldoc.ContentEnd); 
tr.Load(inputStream, DataFormats.Rtf);

之后创建自定义文本处理myObject的财产

Block curBlock = fldoc.Blocks.FirstBlock; 
Inline curInline = (currentBlock as Paragraph).Inlines.FirstInline; 
Run curRun = (currentInline as Span).Inlines.FirstInline as Run; 
return new CustomTextBox(tr, currentRun.ContentStart, myObject)

一旦失去焦点我的自定义文本框

TextPointer ptr = CurrentRun.ContentStart; 
ptr.DeleteTextInRun(ptr.GetTextRunLength(LogicalDirection.Forward)); 
ptr.InsertTextInRun(mainTextbox.Text); 
using (MemoryStream ms = new MemoryStream()) 
{ 
    tr.Save(ms, DataFormats.Rtf); 
    myObject.someStr = ASCIIEncoding.Default.GetString(ms.ToArray()); 
}

现在的问题：如果myObject.someStr == ""，然后curBlock == null，我不能实例化CustomTextBox。我想

Paragraph p = new Paragraph(); 
Span s = new Span(); 
Run r = new Run(tr.Text); 
s.Inlines.Add(r); 
p.Inlines.Add(s); 
fldoc.Blocks.Add(new Paragraph()); 
return new CustomTextBox(tr, r.ContentStart, myObject)

，但TR是空的反正。我该如何处理？

来源

2017-02-13 Dmitry Pavlushin

fldoc = new FlowDocument(p);

帮助

来源

2017-02-15 18:32:59

创建RTF在flowdocument中运行

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