Simulate JavaScript in C # to implement Eval

This problem is encountered in the project, giving a expression, the result is similar to the eval in JavaScript. Colleagues use this method to solve, feel very clever, special affixed to this.

Using the features of the DataTable-compatible SQL formula in Ado.net, it is now concluded that as long as it is a simple formula that can be supported in SQL, the value can be obtained in this way.

Using System;
Using System.Collections;

Public class MyClass
{
    public static void Main ()
    {
  & nbsp;     try
        {
             Double dblresult = convert.todouble (Myclass.eval (@ "1+2*3+120%50/4"));
            Console.Write (Dblresult);
            console.readline ();
       }
        catch (System.Exception ex)
         {
            Console.WriteLine (ex. message);
            console.readline ();
       }
   }

    public static object Eval (string expression)
    {
  
         System.Data.DataTable table=new System.Data.DataTable ();
        System.Data.DataColumn col=new System.Data.DataColumn ("Col1", typeof (String), expression);
        table. Columns.Add (Col);
  
        table. Rows.Add (new object[] {""});
        return table. ROWS[0][0];
   }
}