file exists

[akim]

hi,

 

i don't know how to check if a file exists in a directory

 

my code to open a file is:

Dim sr As IO.StreamReader = New IO.StreamReader(New IO.FileStream("C:\test.txt", IO.FileMode.Open))

 

before i must check if the file exists!!!!!

 

how can i do this???

 

can anyone give me an example for my example????

 

thanx alot

 

akim

[dynamic_sysop]

   Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
       Dim f As IO.File
       Select Case f.Exists("C:\test.txt")
           Case True
               MessageBox.Show("file exsists!")
           Case False
               MessageBox.Show("file not found!")
       End Select
   End Sub

[akim]

hi,

 

thx for your answer!!!!!!!!!!!

 

But can you give me an example that fits with my code????

 

Dim sr As IO.StreamReader = New IO.StreamReader(New IO.FileStream("C:\test.txt", IO.FileMode.Open))

 

dim a as String = sr.ReadToEnd()

 

sr.close()

 

 

 

thx,

 

akim

[mutant]

The example dynamic_sysop gave you fits perfectly into your case :)

If Io.File.Exists("C:\test.txt") Then
    Dim sr As IO.StreamReader = New IO.StreamReader(New IO.FileStream("C:\test.txt", IO.FileMode.Open)) 
    dim a as String = sr.ReadToEnd()
    sr.close()
Else
    'File does not exit, exit the sub or whatever you want to do
End If

[akim]

hi,

 

thanx for your example.

 

but i get the error message that the objectreference is not reverenced to the object instance!!!!!!!!!

 

in line if textfile.Exists("C:\tex.txt") then

 

can you hlep me

 

 

akim

[mutant]

It supposed to be Io.File.Exist not textfile.Exists like you just said, and what I showed you works. You dont need to declare any variable as the File class has shared methods.

:)