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Reading text files

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In Visual Basic .NET you read a text file by first opening a StreamReader on it, and then iterating over all its lines until its Peek method returns -1:

Click here to copy the following block
Dim sr As New StreamReader("c:\autoexec.bat")

' Display all the text lines in the file.
Do Until sr.Peek = -1
  ' The ReadLine methods reads whole lines.
  Console.WriteLine(fs.ReadLine)
Loop
' Always close a StreamReader when you've done with it.
sr.Close()

You can also read one character at a time withusing the Read method, or you can read all the remaining characters withusing the ReadToEnd method. For example, this routine returns the entire contents of any text file in one operation:

Click here to copy the following block
Function ReadTextFile(ByVal filename As String) As String
  Dim sr As New StreamReader(filename)
  ReadTextFile = sr.ReadToEnd()
  sr.Close()
End Function


Submitted By : Nayan Patel  (Member Since : 5/26/2004 12:23:06 PM)

Job Description : He is the moderator of this site and currently working as an independent consultant. He works with VB.net/ASP.net, SQL Server and other MS technologies. He is MCSD.net, MCDBA and MCSE. In his free time he likes to watch funny movies and doing oil painting.
View all (893) submissions by this author  (Birth Date : 7/14/1981 )


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