During the last few days I have been trying to control a JEXEServer from
C#. I have downloaded, studied
and compiled Alex Rufon's example on the J wiki but I cannot get it to
behave.
I am using the free Visual C# Express edition. I don't believe there are
any C# version specific issues but I could
be wrong. The following snippet is just about the simplest possible use of
a JEXEServer
private void button1_Click(object sender, EventArgs e)
{
object jout;
string jstr;
JEXEServerLib.JEXEServer jObject = new JEXEServerLib.JEXEServer();
jObject.Log(1);
jObject.Show(1);
jObject.Do("jRes=. 'string from J'");
jObject.GetB("jRes", out jout);
jstr = (string) jout;
textBox.Text = jstr;
jObject.Quit();
jObject = null;
}
This almost works with the following exceptions:
1) The JEXEServer never appears despite being requested with a Show(1)
2) The Quit() does not shutdown the J server
3) Exiting the C# app leads to an invalid memory reference in J. Probably
related to not shutting down properly.
I can see J executing as j.exe shows in the process list and I can send and
receive data from the server. I have used similiar code in VB for years and
I judge people (Alex) have managed this from C# as well. Has anyone tried
this recently in any of the Express compilers.
--
John D. Baker
[email protected]
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