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vb.net select line in richtextbox

I need to be able to select all of the text in a richtextbox on the line that the user doubleclicks. However, thus far I have been unable to determine exactly how to do this.

I have experimented with the following code:

Dim start As Integer = txtNotes.SelectionStart
Dim len As Integer = txtNotes.SelectionLength

txtNotes.Select(start, len)

This is only selecting the word that the user clicks on, and not the entire line as is needed.

For reference, I am working in vb.net 2005.

gangwisch

dim selectlinenumber as integer=2
dim lines() as string=split(txtnotes.text,vbcrlf)
txtNotes.SelectionStart=getselectionstart(lines,selectlinenumber)
txtNotes.SelectionLength=lines(selectlinenumber-1).length

function getselectionstart(lines() as string,linenumber as integer) as integer
dim total as integer=0
for i as integer=0 to linenumber-1
total+=lines(i).length
next
return total
end function

iscontact

ASKER

Here is what I have based on your suggestion:

Private Sub txtNotes_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtNotes.DoubleClick
Dim selectlinenumber As Integer = 2
Dim lines() As String = Split(txtNotes.Text, vbCrLf)
txtNotes.SelectionStart = getselectionstart(lines, selectlinenumber)
txtNotes.SelectionLength = lines(selectlinenumber - 1).Length
End Sub

Function getselectionstart(ByVal lines() As String, ByVal linenumber As Integer) As Integer
Dim total As Integer = 0
For i As Integer = 0 To linenumber - 1
total += lines(i).length
Next
Return total
End Function

However, I receive an error stating that the index (i) in the function is outside the bounds of the array.

iscontact

ASKER

I have noticed, upon experimentation, that the problem seems to be data related with regards to this method. The issue is that there is indeed a line break between the items in the database (which is SQL server). However, the data was actually entered in the database by a VB6 program so I do not know what line break character to look for in the data.

ASKER CERTIFIED SOLUTION

Mike Tomlinson

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iscontact

ASKER

Excellent suggestion Idle. I have one more items in relation to this that needs to be addressed, however. Once the line has been selected, how do I retrieve the value of the text selected?

iscontact

ASKER

With Idle's example, I have been able to answer my last question, I just needed to work through it a little closer. Thanks for the help.