Need help to read next line

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Hello I am using stringreader to read strings of data from a richtextbox. Data is being added to the richtextbox and I need to show the new added line when its added to a label so that the label will change when a new line is added to the richtextbox. something like read to end for streamreader.

please help I am unsure what loop to use in this case

thank you in advance

Here is what i have tried but for some reason i only get the first added entry. the next added entry does not show in the label

VB

Dim reader As New StringReader(RichTextBox2.Text)
        Dim tmp As String = reader.ReadToEnd
 Dim MD As Match = md.Match(tmp)
For Each M As String In RichTextBox2.Lines
           If M.Contains(MD.ToString) Then
               Label4.Text = MD.ToString
           End If
       Next M

Posted 30-Jul-13 19:36pm

Draco2013

Updated 30-Jul-13 21:18pm

v3

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Prasad Khandekar 31-Jul-13 1:59am

Why not simply use Label.Text = RichtextBox.Text

Regards,

Draco2013 31-Jul-13 2:02am

because that will show all text i only wish to show the newly added line

Prasad Khandekar 31-Jul-13 2:24am

If you know the old value of RichTextBox, Which I am sure you will, then it's relatively easy. Just use code something like shown below.

strNewVal = RichTextBox.Text
Label.Text = strNewVal.SubString(strOldValue.Length + 1)

Regards

Draco2013 31-Jul-13 2:35am

the old value is not stored in any string or variable how am i to call stroldvalue.length +1? also would that not count the string length as a integer?

Draco2013 31-Jul-13 2:38am

new strings are added to the richtextbox from another source. I am unaware of the new values until they are added. all i am looking to do is add the newly added item to a label and when the next new value is added to the richtextbox the label will display that value changing it

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Samresh.ss · Accepted Answer · 2013-07-30T20:50:00

Solution 1

When you get all lines in RichTextBox2.Lines.

To get the last line added why don't you use.

string str = RichTextBox2.Lines[RichTextBox2.Lines.Length - 1];

Posted 30-Jul-13 20:50pm

Samresh.ss

Comments

Draco2013 31-Jul-13 3:05am

I tried this but get numbers.... :( i am not looking to count the length of the string lol im not sure you understand my question

Draco2013 31-Jul-13 3:18am

I have updated the code in hopes someone can see what i am trying to do