asked on

Convert C# code for concatenating files to VB

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

ASKER CERTIFIED SOLUTION

Clif

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SOLUTION

mdamico

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GCaron

ASKER

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

Clif

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)

GCaron

ASKER

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

Clif

Glad to be of service. :)