[英]Create RTF run in flowdocument
有人可以幫我理解RTF嗎? 我有一些字符串填充的inputStream
inputStream = new MemoryStream(Encoding.ASCII.GetBytes((myObject.someStr)));
然后將此流傳遞給flowdocument
FlowDocument fldoc = new FlowDocument();
TextRange tr = new TextRange(
fldoc.ContentStart, fldoc.ContentEnd);
tr.Load(inputStream, DataFormats.Rtf);
之后,我創建自定義文本框來處理myObject
的屬性
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)
失去焦點后,我的自定義文本框會
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());
}
現在的問題是:如果myObject.someStr == ""
,那么curBlock == null
,並且我無法實例化CustomTextBox。 我在嘗試着
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還是空的。 我該如何處理?
fldoc = new FlowDocument(p);
幫助
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