Question

Urgent Help on VB6 chr$() to C#

Asked by: yymae

Dear all,

I'm using VB6 need to convert to C# for printing. In VB6 I will send some printer command into the printer as below:-

Printer.Print "TESTING LINE 1"
Printer.Print "TESTING LINE 2"
Printer.Print Chr$(&H1C); "(L"; Chr$(66); Chr$(49);
Printer.Print Chr$(&H1D); "V"; Chr$(49);
Printer.Print Chr$(&H1C); "(L"; Chr$(67); Chr$(50);

In C# I'm writing a text file and open LPT1 to print some lines, the problem is how to convert those VB6 codes into C# ?

I've try using some sample code as below :-

writer.WriteLine ("TESTING LINE 1" + ((char) 13));
writer.WriteLine ("TESTING LINE 2" + ((char) 13));
writer.WriteLine( ((char)&H1C) + "(L" + ((char)66) +  ((char)49));
writer.WriteLine( ((char)&H1D) + "V" + ((char)49));
writer.WriteLine( ((char)&H1C) + "(L" + ((char)66) +  ((char)49));


But there are errors on '&H1C', '&H1D' on the above codes.

If I use VB6 to print it will print the "(L" character out when I'm using VB6 to print. How to resolve this as well ?

Please provide solutions and examples.


Thanks in advance


Cheers,
yymae

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Asked On
2004-10-15 at 01:59:09ID21169470
Tags

vb6

Topic

C# Programming Language

Participating Experts
4
Points
100
Comments
7

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Answers

 

by: TasneemPosted on 2004-10-15 at 02:52:31ID: 12317409

Casting does not work in all cases as C# uses Unicode! You need to be aware of this when using strings that were created in VB. Fortunately, MS included Microsoft.VisualBasic.Strings, which has the Chr() and Asc() function calls.
Something like
If e.KeyChar = Microsoft.VisualBasic.ChrW(13) Then
            e.Handled = False
            MsgBox("You pressed Enter.")
            Exit Sub
        End If

OR
Chr System.Char.GetNumericValue(char)
Asc System.Char.Parse(String)
 
 

 

by: smeggheadPosted on 2004-10-15 at 05:54:09ID: 12318606

Hello,

I wouldn't use the VisualBasic namespace, when C# can deal with this in it's own way.

Use

      Console.WriteLine("Hello\x41There");

This will produce the results

HelloAThere

Becuase hex 41='A'

\x is the escape sequence for hex

Smg.

 

by: AvonWyssPosted on 2004-10-15 at 10:27:10ID: 12321774

&H1C is a hex constant in basic. 0x1C would be the same hex constant in C#. Just replace &H with 0x.

 

by: TheLearnedOnePosted on 2004-10-18 at 09:19:40ID: 12339486

writer.WriteLine("TESTING LINE 1");
writer.WriteLine("TESTING LINE 2");
writer.WriteLine(Chr(28) + "(L" + Chr(66) + Chr(49));
writer.WriteLine(Chr(29) + "V" + Chr(49));
writer.WriteLine(Chr(28) + "(L" + Chr(67) + Chr(50));

Bob

 

by: smeggheadPosted on 2004-10-18 at 09:28:00ID: 12339591

Or.. (without using the VB compatibility)

writer.WriteLine ("TESTING LINE 1\x0d");
writer.WriteLine ("TESTING LINE 2\x0d");
writer.WriteLine("\x1c(L\x42\x31");
writer.WriteLine("\x1dV\x31");
writer.WriteLine("\x1c(L\x42\x31");

 

by: smeggheadPosted on 2004-10-27 at 02:03:16ID: 12419558

Thanks for accepting my answer, but why just a grade 'C' ?? was the answer missing something ?

Smg.

20120131-EE-VQP-002

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