Question

I have some c# code that uses the Microsoft Scripting Control to evaluate some expressions:

using MSScriptControl; // references msscript.ocx

ScriptControlClass sc = new ScriptControlClass();
sc.Language = "VBScript";
sc.AllowUI = true;

try
{
    Console.WriteLine(sc.Eval(txtEx.Text).ToString());
}
    catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

(txtEx is a simple text field)

Numerical expressions: “6+4”, “cos(34)”, “abs(-99)”, “round(1.234, 2)” etc. are fine

Boolean expressions: “true or false”, “1=2” are fine

But how can I evaluate a simple ‘if’? I have tried “if(true, 2, 3)”, “iif(true, 2, 3)”, “if (true) then 2 else 3” and “if (true) then 2 else 3 endif”

Can anybody please help me to evaluate simple conditional expressions? Any help much appreciated!

RH

Answer 1

Try wrapping your IF-expression in a function

Function test
   if (true) then
      return true
   else
      return false
   end if
End function

Add the function to the control and then use Run

Result = ScriptControl.Run("Test")

(the code above is not tested, but something along that way should work)

Check out this link for some more info

http://support.microsoft.com/kb/184740