使用 DataTable.Compute() 方法比较 C# Visual Studio 中的两个变量

Question

DataTable dt = new DataTable();
string output = (dt.Compute("3 > 2", String.Empty)).ToString();
MessageBox.Show("Output is " + output);

if I compare 3 > 2, it gives me True but I want to achieve similar functionality

using variables such as:

string output = (dt.Compute("a > b", String.Empty)).ToString();

how can I add my variables to the table to achieve this?

Answer 1

Compute needs a string expression to work, you can provide the expression with interpolating the values from your variables as in

int a = 3;
int b = 2;
string output = (dt.Compute($"{a} > {b}", String.Empty)).ToString();

However, as @JohnG pointed in a comment below, a question needs to be asked here. Why do you need this? You can get the same result with probably a better performance using simple lines of code like

string output = "false";
if(a > b)
    output = "true";