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Convert C# code for concatenating files to VB

Posted on 2004-08-11
6
227 Views
Last Modified: 2012-06-27
VB.NET newbie question.....

I am trying to convert the following C# code from a similar Q&A to VB to combine multiple files together but ended up creating a large continuously growing file.

=================================
ORIGINAL C# CODE
=================================
FileStream file1  = File.OpenRead(textBox1.Text);
FileStream file2  = File.OpenRead(textBox2.Text);
FileStream output = File.OpenWrite("output.file");

int fileByte;
while((fileByte = file1.ReadByte()) != -1)
{
     output.WriteByte((byte)fileByte);              
}

while((fileByte = file2.ReadByte()) != -1)
{
     output.WriteByte((byte)fileByte);              
}

file1.Close();
file2.Close();
output.Close();

=================================
COVERTED VB CODE
=================================
        Dim file1 As New FileStream("c:\temp\ini_files\ini_part_1.txt", FileMode.Open)
        Dim file2 As New FileStream("c:\temp\ini_files\ini_part_2.txt", FileMode.Open)
        Dim fileOutput As New FileStream("c:\temp\ini_files\ini_part_3.txt", FileMode.CreateNew)

        Dim fileByte As Integer

        While ((fileByte = file1.ReadByte()) <> -1)
            fileOutput.WriteByte((byte)fileByte)
        End While

        While ((fileByte = file2.ReadByte()) <> -1)
            fileOutput.WriteByte((byte)fileByte)
        End While

        file1.Close()
        file2.Close()
        fileOutput.Close()
=================================

I'm mainly unsure how to covert the line:

fileOutput.WriteByte((byte)fileByte)

I received "'byte' is a type, and so is not a valid expression" from Visual Studio.

Detailed code or general pointers would be most appreciated.

Thank you
0
Comment
Question by:GCaron
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6 Comments
 
LVL 10

Accepted Solution

by:
Clif earned 150 total points
ID: 11773648
How about:

fileOutput.WriteByte(CType(fileByte, Byte))
0
 
LVL 7

Assisted Solution

by:mdamico
mdamico earned 100 total points
ID: 11773821
In case you aren't aware of these, there are a couple online sites that do C# to VB.Net conversions.  

http://www.developerfusion.com/utilities/convertcsharptovb.aspx

http://authors.aspalliance.com/aldotnet/examples/translate.aspx
0
 

Author Comment

by:GCaron
ID: 11774275
I split the points as you both answered my main question although I am still generating a continous file.

I am now using the following code after changing some lines due to the suggestions and conversions:

================================================================
        Dim file1 As FileStream = file.OpenRead("c:\temp\ini_files\ini_part_1.txt")
        Dim file2 As FileStream = file.OpenRead("c:\temp\ini_files\ini_part_2.txt")
        Dim fileOutput As FileStream = file.OpenWrite("c:\temp\ini_files\ini_part_3.txt")
        Dim fileByte As Integer

        While Not ((fileByte = file1.ReadByte()) = -1)
            fileOutput.WriteByte(CType(fileByte, Byte))
        End While

        While Not ((fileByte = file2.ReadByte()) = -1)
            fileOutput.WriteByte(CType(fileByte, Byte))
        End While

        file1.Close()
        file2.Close()
        fileOutput.Close()
================================================================

I am now receiving the error alert on the lines referencing "file.OpenRead" stating "Local variable 'file' cannot be referred to before it is declared". I know I am close but I just don't see what I am missing?

Thanks again
0
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LVL 10

Expert Comment

by:Clif
ID: 11774394
Go back to using:

        Dim file1 As New FileStream("c:\temp\ini_files\ini_part_1.txt", FileMode.Open)
        Dim file2 As New FileStream("c:\temp\ini_files\ini_part_2.txt", FileMode.Open)
        Dim fileOutput As New FileStream("c:\temp\ini_files\ini_part_3.txt", FileMode.CreateNew)


0
 

Author Comment

by:GCaron
ID: 11774984
Thanks, the final code I used to achieve what I needed is as follows;

===============================================

        Dim fn1 As String = "c:\temp\ini_files\ini_part_1.txt"
        Dim fn2 As String = "c:\temp\ini_files\ini_part_2.txt"
        Dim fn3 As String = "c:\temp\ini_files\ini_part_3.txt"

        Dim f1 As New FileStream(fn1, FileMode.Open, FileAccess.Read, FileShare.Read)
        Dim f2 As New FileStream(fn2, FileMode.Open, FileAccess.Read, FileShare.Read)
        Dim f3 As New FileStream(fn3, FileMode.Create, FileAccess.Write, FileShare.Read)

        ' Create a reader that can read bytes from the FileStream.
        Dim sr1 As New BinaryReader(f1)
        ' While not at the end of the file, read lines from the file.
        While sr1.PeekChar() > -1
            Dim input As Byte = sr1.ReadByte()
            f3.WriteByte(CType(input, Byte))
        End While
        sr1.Close()

        ' Create a reader that can read bytes from the FileStream.
        Dim sr2 As New BinaryReader(f2)
        ' While not at the end of the file, read lines from the file.
        While sr2.PeekChar() > -1
            Dim input As Byte = sr2.ReadByte()
            f3.WriteByte(CType(input, Byte))
        End While
        sr2.Close()

        f1.Close()
        f2.Close()
        f3.Close()
===============================================

Thanks again
0
 
LVL 10

Expert Comment

by:Clif
ID: 11775072
Glad to be of service.  :)
0

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