[Connect Update 16 C#] Get Datafield from Textblock

Question

There are a few examples of identifying EDF in a single textblock using the C++ api, i was hoping someone has done that in the .net api, or could point me in the right direction. I am able to Get Textblock, and create a caret, but how do I get a Run from a caret? Looks like there's Caret.MoveToNextRun, but that doesn't seem to return a run, and Caret.PreviousCharacter and Caret.NextCharacter returns just Char, which isn't going to help me identify if its an EDF or not. Is there another way of stepping through each part of a textblock? 
 Thanks.

Yongan.Fu · Answer

I wrote a test code as below to get EDF from text element. It uses several new text related classes, such as ParagraphRange, ParagraphIterator and RunIterator. 
 private static void GetEDF()
 {
 ulong id = 1193;
 DgnModel dgnModel = Session.Instance.GetActiveDgnModel();
 Element elem = dgnModel.FindElementById(new ElementId(ref id));
 TextQuery txtQuery = TextQuery.GetAsTextQuery(elem);
 TextQueryOptions options = new TextQueryOptions();
 TextPartIdCollection txtParts = txtQuery.GetTextPartIds(options);
 TextBlock txtBlk = txtQuery.GetTextPart(txtParts[0]);
 ParagraphRange paraRng = new ParagraphRange(txtBlk);
 ParagraphIterator paraIter = paraRng.GetParagraphIterator();
 while (paraIter.MoveNext())
 {
 RunIterator runIter = paraIter.GetRunIterator();
 while (runIter.MoveNext())
 {
 Run run = runIter.Current;
 EdfCharStream edf = run as EdfCharStream;
 bool isEdf = (edf == null) ? false : true;
 MessageCenter.Instance.ShowInfoMessage(run.ToString() + ", isEdf =" + isEdf.ToString(), null, false);
 }
 }
 } 
 My test text is as below: 
 
 Output in message center is as below: 
 
 I also just write a wiki to discuss what is TextPart as below. The article is in Chinese but I believe google can easily translate it into English . 
 关于TextBlock中的TextPart

[Connect Update 16 C#] Get Datafield from Textblock

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