I have a RichTextBox
with Name = Editor
! And the following code :
String textRich = new TextRange(Editor.Document.ContentStart, Editor.Document.ContentEnd).Text;
EditorColor ec = new EditorColor(textRich);//Transform The text in RTF Text
Stream stream = new MemoryStream(ASCIIEncoding.Default.GetBytes(ec.SetText())); //SetText Function return a RTF text
Editor.Selection.Select(Editor.Document.ContentStart, Editor.Document.ContentEnd);
Editor.Document.Blocks.Clear();
Editor.Selection.Load(stream, DataFormats.Rtf);//Change the text with the RTF Text
Editor.CaretPosition = ????
I want to set Editor.CaretPosition
to be as it was before I selected and changed the text ? Doesn't work as here :
TextPointer carret = Editor.CaretPosition;
do above code ......
Editor.CaretPosition = carret; // it sets the carret at end of Richtextbox
So how to do that ?
This should work if your plain text is transformed into formatted text:
// Save the current position
int caretIntPosition = GetIntPosition(Editor.CaretPosition, Editor);
// Do your work ...
// Restore the position
SetIntPosition(caretIntPosition, Editor);
/// <summary>
/// Converts a TextPointer position into an int position.
/// </summary>
int GetIntPosition(TextPointer pointerPosition, RichTextBox rtb)
{
int intPosition = 0;
TextPointer currentPosition = rtb.Document.ContentStart;
while (currentPosition.CompareTo(pointerPosition) != 0)
{
intPosition++;
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
return intPosition;
}
/// <summary>
/// Converts an int position back into a TextPointer position and places the caret there.
/// </summary>
void SetIntPosition(int intPosition, RichTextBox rtb)
{
TextPointer currentPosition = rtb.Document.ContentStart;
for (int i = 1; i <= intPosition; i++)
{
currentPosition = currentPosition.GetNextInsertionPosition(LogicalDirection.Forward);
}
rtb.CaretPosition = currentPosition;
}
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