File.Exists doesn't work for me ?

[alainb]

Hi Guys,

I'm new to vb.net, I don't understand why when launching this program with Module1.vb as parameter the instruction File.Exists(CommandLineParameter) returns false ?

Maybe I didn't sleep enough but I really can't see why

Thanks.

Imports System.IO
Imports System.Diagnostics


Module Module1

    Sub Main()

        Dim ProcessStartInfo As New ProcessStartInfo

        Dim CompilerPath As String
        Dim CompilerName As String
        Dim CommandLineCommand As String

        Dim SourceName As String
        Dim SourcePath As String
        Dim CommandLineParameter As String

        Dim CommandLine As String

        CompilerPath = "C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\"
        CompilerName = "vbc.exe"
        SourcePath = Environment.CurrentDirectory()

        CommandLineCommand = Chr(34) + CompilerPath + CompilerName + Chr(34)

        Console.WriteLine("To compile with " + CommandLineCommand)
        Console.WriteLine("Enter the source name to compile in " + Chr(34) + SourcePath + Chr(34))
        SourceName = Console.ReadLine()
        CommandLineParameter = Chr(34) + SourcePath + "\" + SourceName + Chr(34)

        CommandLine = CommandLineCommand + " " + CommandLineParameter
        Debug.Print(CommandLine)
:confused:
        If Not File.Exists(CommandLineParameter) Then
            Console.WriteLine(CommandLineParameter + " " + "doesn't exist!")
            Debug.Print(CommandLineParameter + " " + "doesn't exist!")
        End If

        Try
            ProcessStartInfo.FileName = CommandLineCommand
            ProcessStartInfo.Arguments = CommandLineParameter
            Process.Start(ProcessStartInfo)
        Catch Exception As Exception
            Console.WriteLine(Err.Number)
            Console.WriteLine(Exception.Message)
            Console.WriteLine(CommandLineParameter)
        End Try

        Console.ReadLine()
    End Sub

End Module

 

[JohnH]

Probably because you have quoted it, the doublequote char is not valid in file or folder names.

 

[cjard]

Please dont use + to concatenate strings in VB