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MathGroup Archive 2006

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.NET/Link and two-dimensional strings

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66989] .NET/Link and two-dimensional strings
  • From: "colin" <colin.ladyka at scf.sk.ca>
  • Date: Tue, 6 Jun 2006 06:27:47 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

The following two lines export a jpeg file containing RED text when
executed in a notebook:

myText="\!\(\*StyleBox[\"my text\",\nFontColor->RGBColor[1, 0, 0]]\)";
Export["C:\\Temp\\myText.jpg",Show[Graphics[Text[myText,{0,0}]]]];

If I put these same lines in a file called myText.txt, and then read
this file with the following .NET code, the kernel produces a jpeg file
containing BLACK text.

using System;
using System.IO;
using Wolfram.NETLink;

namespace WriTest
{
    static class Program
    {
         static void Main()
        {
            MathKernel mathKernel = new MathKernel();

            StreamReader streamReader = new
StreamReader(@"C:\Temp\myFile.txt");
            string command1 = streamReader.ReadLine();
            string command2 = streamReader.ReadLine();
            streamReader.Close();

            mathKernel.Compute(command1);
            string result1 = mathKernel.Result.ToString();

            mathKernel.Compute(command2);
            string result2 = mathKernel.Result.ToString();
       }
    }
}

Note an examination of command1 within the debugger, just before it is
sent to the kernel, produces the following string:

"myText=\"\\!\\(\\*StyleBox[\\\"my text\\\",\\nFontColor->RGBColor[1,
0, 0]]\\)\";"

Wrapping ToExpression around this string in a Mathematica notebook
results in the desired red text. This problem seems to be related to
the need for the StyleBox which can only be found in a two-dimensional
string.  Other two dimensional string also lead to problems.

What is my problem?


    Colin


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