10/04/24 16:15:42
>>635
var curP = richTextBox.CaretPosition.Paragraph;
var offset = curP.ContentStart.GetOffsetToPosition(richTextBox.CaretPosition);
var newP = new Paragraph();
newP.Inlines.Add("New Paragraph");
richTextBox.Document.Blocks.InsertBefore(curP, newP);
richTextBox.Document.Blocks.Remove(curP);
richTextBox.CaretPosition = newP.ContentStart.GetPositionAtOffset(offset) ?? newP.ContentEnd;
これじゃダメなん？