CODEWITHSUNDEEP
vb.net
vahid Araghi
vahid Araghi

Reputation: 136

How to get number of line of a specific word in it in multiline textbox in vb .net

I have a multiline text box and I want to get line number that specific word in it.

I tried this:

For Each line As String In TextBox1.Lines
    If line = "50" Then
        Label2.Text = 'Number Of line
    End If
Next

But I don't know how to get line number that "50" in it and show it in label2. how can i do that?

Upvotes: 0

Views: 160

Answers (3)

Slugsie
Slugsie

Reputation: 905

Or try this:

Dim lines = TextBox1.Lines
Label2.Text = Array.IndexOf(lines, "50").ToString()

That will show the (zero based) index of first line to contain "50". Or -1 if no matching lines found.

Upvotes: 0

Slugsie
Slugsie

Reputation: 905

Try using a counter:

Dim iLineCount As Integer = 0

For Each line As String In TextBox1.Lines
    iLineCount += 1
    If line = "50" Then
        Label2.Text = iLineCount.ToString()
    End If
Next

Upvotes: 1

Tim Schmelter
Tim Schmelter

Reputation: 460048

Use a For-loop instead of a For Each:

Dim lines = TextBox1.Lines
For i As Int32 = 0 To lines.Length - 1
    If lines(i) = "50" Then Label2.Text = (i + 1).ToString()
Next

I'm storing the TextBox.Lines String() in a variable because there's some overhead if you use this property often.

Upvotes: 1

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