Converting string formula to mathematical formula in c#

Hai all,

I am doing c#.NET application to calculate different formulas and give result to user,users can enter any formula and each formula values are stored in database like this.

After saving like this i want to calculate the result.When calculating the result,application ask value开发者_如何学编程s for variables.But how can i calculate with this values. Please help to retrieve each values from database and calculate the result.

You can use Shunting-yard algorithm to convert the expression to postfix notation or to ast directly. See this answer for nice explanation: Equation (expression) parser with precedence