Below is what I've been using. While it does work, my program locks up when trying to count a rather large file, say 10,000 or more lines. Smaller files run in no time.
Is there a better or should I say faster way to count the lines in a text file?
Here's what I'm currently using:
Dim selectedItems = (From i In ListBox1.SelectedItems).ToArray()
For Each selectedItem In selectedItems
ListBox2.Items.Add(selectedItem)
ListBox1.Items.Remove(selectedItem)
Dim FileQty = selectedItem.ToString
'reads the data file and returns the qty
Dim intLines As Integer = 0
'Dim sr As New IO.StreamReader(OpenFileDialog1.FileName)
Dim sr As New IO.StreamReader(TextBox1_Path.Text + "\" + FileQty)
Do While sr.Peek() >= 0
TextBox1.Text += sr.ReadLine() & ControlChars.CrLf
intLines += 1
Loop
ListBox6.Items.Add(intLines)
Next
Imports System.IO.File 'At the beginning of the file
Dim lineCount = File.ReadAllLines("file.txt").Length
See this question.