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Simple selection given two numeric positions

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RichTextBox
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Romell
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Romell asked on 11 Jul 2012, 03:33 PM
Hi, all....

There is a RadRichTextBox and want to select text from the Document object based on two positions, 2 parameters: initial position of the character and end character position. That is, the two parameters are only numbers.

Is this possible?

Thanks alls

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Boby
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answered on 16 Jul 2012, 07:32 AM
Hi Xavendano,
You can use DocumentTextMap class for mapping text positions to document positions with the help of MapFromIndexInText method.

Kind regards,
Boby
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Romell
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answered on 16 Jul 2012, 03:59 PM
Hi Boby and thanks....I try the following code (vb,net / WPF WebBrowser Application):

        1: Dim documentMap As New DocumentTextMap(Me.myRadRichTextBox.Document)
        2: Dim textRange As TextRange = documentMap.MapFromIndexInText(2, 4)

        3: Me.myRadRichTextBox.Document.Selection.AddSelectionStart(textRange.StartPosition)
        4: Me.myRadRichTextBox.Document.Selection.AddSelectionStart(textRange.EndPosition)

The line 2 show the following error:

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Why?  Because the line 1 while Im creating the documentMap Object, this is empty:

Error - No children available.

But, the radRich control I'snt not empty, they had a single line with multiple words.....why the line 1 do that??

How can I fix this?

Thanks alls 

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Martin Ivanov
Telerik team
answered on 19 Jul 2012, 10:40 AM
Hello Romell,

You need to initialize the map with document positions. Also your selection must have start and end.
Here is an example:

Dim documentMap As New DocumentTextMap(Me.myRadRichTextBox.Document)
      Dim pos1 As New DocumentPosition(Me.myRadRichTextBox.Document)
      Dim pos2 As New DocumentPosition(Me.myRadRichTextBox.Document)
      pos2.MoveToNextInline()
      pos2.MoveToNextInline()
 
      documentMap.InitMap(pos1, pos2)
 
      Dim textRange As TextRange = documentMap.MapFromIndexInText(1, 5)
 
      Me.myRadRichTextBox.Document.Selection.AddSelectionStart(textRange.StartPosition)
      Me.myRadRichTextBox.Document.Selection.AddSelectionEnd(textRange.EndPosition)


Kind regards,
Martin
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Romell
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answered on 21 Aug 2012, 08:28 PM
Hi Martin,

how I can get the exact opposite?

I mean, given a choice of a text in a RadRichTextBox, how I can get the first and second index that defines the selection made.

Example: "THE HOUSE IS GREEN"
When I select the word "HOUSE", I get :   pos1 = 4 and pos2 = 9.

Thanks ...
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Romell
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answered on 29 Aug 2012, 09:16 PM
Mmmmm   Any ideas???
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Romell
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Boby
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Romell
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Martin Ivanov
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