file exists

[akim]

hi,

i dont 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.