C # implement the computing function of DataTable

Using System;
Using System. ComponentModel;
Using System. Data;
Using System. Windows. Forms;
Namespace WindowsApplication1
{
Public partial class Form1: Form
{

Public Form1 ()
{
InitializeComponent ();
}



Private void button#click (object sender, EventArgs e)
{



System. Data. DataTable table = new DataTable ();


// Calculate the constant. No initialization column is allowed.
Object test = table. Compute ("1 + 1 ","");
Console. WriteLine (test );
// Test = 2;

Test = table. Compute ("1 + 1", "false ");
Console. WriteLine (test );
// Test = 2; constant calculation is irrelevant to filter

Test = table. Compute ("abs (1 )","");
Console. WriteLine (test );
// Test = null. I do not know why this is correct, and null is returned. Other mathematical functions will carry errors.

Test = table. Compute ("2% 2 ","");
Console. WriteLine (test );
// Test = 0;
// For other functions, refer to the following calculation column.


// Initialize datatale
Table. Columns. Add ("id", typeof (string ));
Table. Columns. Add ("value", typeof (int ));
For (int I = 1; I <= 10; I ++)
{
System