using a "for" loop to read a text file

Please support our VB.NET advertiser: Intel Parallel Studio Home
Reply

Join Date: May 2006
Posts: 4
Reputation: randycena is an unknown quantity at this point 
Solved Threads: 0
randycena randycena is offline Offline
Newbie Poster

using a "for" loop to read a text file

 
0
  #1
May 29th, 2006
hello! I need to use this for loop to extract specific data from a text file. But it gives me an error message:syntax error.I hope you don't mind helping. Thank you for your time and effort.

Below is my codes:

OpenFileDialog1.ShowDialog()
Dim a As String
TextBox2.Text = OpenFileDialog1.FileName
a = TextBox2.Text
Dim objStreamReader As New StreamReader(TextBox2.Text)

for each i as StreamReader
objStreamReader.ReadLine()
TextBox4.Text = (objStreamReader.ReadLine())
Label2.Text = TextBox4.Text.Substring(0, 3)

Next

objStreamReader.Close()
Reply With Quote Quick reply to this message  
Join Date: Mar 2006
Posts: 12
Reputation: zmind is an unknown quantity at this point 
Solved Threads: 0
zmind zmind is offline Offline
Newbie Poster

Re: using a "for" loop to read a text file

 
0
  #2
May 29th, 2006
hi randycena,

I am not sure of the purpose of your code as your description is brief and I assumed that you wish to read a text file and extract certain string from the file. If we just take the for loop portion of the code, there maybe some problem. You're defining the streamreader object for every loop you go through which is not so correct. The stremreader object can read a whole stream at one go. You should use the objStreamReader you defined earlier as this instance has been 'tied' to the text file defined in textbox2.text. So instead of using For..Next loop, you should you While..End While and use the EndOfStream property to check if it's end of stream.

While NOT objStreamReader.EndOfStream
'do whatever you want to do
End While
Reply With Quote Quick reply to this message  
Join Date: May 2006
Posts: 4
Reputation: randycena is an unknown quantity at this point 
Solved Threads: 0
randycena randycena is offline Offline
Newbie Poster

Re: using a "for" loop to read a text file

 
0
  #3
May 29th, 2006
thank you but now i have this error:
'EndOfStream' is not a member of 'System.IO.StreamReader'.
Reply With Quote Quick reply to this message  
Reply

This thread is more than three months old.
Perhaps start a new thread instead?
Message:


Thread Tools Search this Thread



About Us | Contact Us | Advertise | DaniWeb | Acceptable Use Policy | RSS Feed

©2003 - 2009 DaniWeb® LLC