Dynamic compilation (1)

statement of problem

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There is such an XML file, which is about the price list, the content is as follows:

9.00

100

0.95

10

Unit * Quantity * Discount - Other Offers

2.00

200

0.98

10

Unity * Quantity * Discount Additional Fee

The current demand is:

According to the "calculation expression" above (the user is given, it may change at any time) to find the value of each item.

Note: The above notebook is not the same as the calculation expression of the cup.

How to use C # automatically calculate the value of each item?

Idea:

(1) use XPath?

(2) Use dataset?

(3) Dynamic compilation, automatically calculate the value of the value of the expression to calculate the value, similar to the EVAl () in JavaScript.

(Endlessly)