Sometimes the data i require comes in from two columns. Therefore while
mapping I can specify A+B
Like NetSalary + Tax = Gross.

Is there any object or function that allows me to evaluate a string
expression?

Thanks,
Nasim

Dim sc As New MSScriptControl.ScriptControl()
sc.Language = "VBScript"
Dim espr As String = "12 + 3 * 10"
Dim res As Double = sc.Eval(expr)

' display the result
Console.WriteLine("{0} = {1}", expr, res

Nasim

You might try something like this...

You could build a dll using jscript and then reference it from your project.
It would look something like:

// JScript source code
class EvalClass
{
    function Evaluate(expression)
    {
        return eval(expression);
    }

jsc /target:library evaluator.js

Then you can reference the resulting evaluator.dll and Microsoft.JScript.dll
in your VB project.  You could then call the function like this:

Dim ec As New EvalClass()
Dim expr As String = "12 + 3 * 10"
Dim res As Double = CType(ec.Evaluate(expr), Double)

Console.WriteLine("{0} = {1}", expr, res)

This way you don't have to use COM interop... You can stay right in the .net
world :)

HTH,
Tom Shelton