I was creating an application in Visual Basic the other day and I couldn’t remember how to check to see if a file exists, so I thought I would do a quick example to see if a file exitsts. If the file exists, the program will continue on, however, if the file doesn’t exist you will get a message box saying that the file does not exist, and the application will exit.
1 2 3 4 | If System.IO.File.Exists("C:\MyDocs\MyFile.txt") = False Then MsgBox("Field does not exist!", MsgBoxStyle.Critical, "File Not Found") Application.Exit() End If |
If you have an Imports System.IO call in your program, then you can shorten the method call by deleting the System.IO class name, which would give you.
1 2 3 4 | If File.Exists("C:\MyDocs\MyFile.txt") = False Then MsgBox("Field does not exist!", MsgBoxStyle.Critical, "File Not Found") Application.Exit() End If |
This method call is supported in .NET Framework version 3.5, 3.0, 2.0, 1.1, and 1.0.
Thanks for the code. But a problem with this code is it can not find whether a file exists in the network.
Arnab, you are correct, this code only works on a local file, I’ll try and update it when I get a chance for network (or UNC) files.
Arnab, correction to my correction
I just tested this out and it turns out that you can in fact use this class to access network files.