Dynamic Expresso Case Sensitive Expressions

By default, all expressions are considered case-sensitive. For example, VALUE is different than value. The Dynamic Expresso library provides an option to use a case-insensitive parser.

The following example defines a variable called val and then uses it in expression.

public static void Example1() { Interpreter interpreter = new Interpreter(); interpreter.SetVariable("val", 6); string expression = "val + VAL + Val"; var result = interpreter.Eval(expression); Console.WriteLine("{0} = {1}", expression, result); } 

Let's run the above code, and you will see the following exception.

DynamicExpresso.Exceptions.UnknownIdentifierException: 'Unknown identifier 'VAL' (at index 6).' 

To use case insensitive expressions, pass InterpreterOptions.CaseInsensitive options to Interpreter constructor as a parameter, as shown below.

public static void Example2() { Interpreter interpreter = new Interpreter(InterpreterOptions.CaseInsensitive); interpreter.SetVariable("val", 6); string expression = "val + VAL + Val"; var result = interpreter.Eval(expression); Console.WriteLine("{0} = {1}", expression, result); } 

Let's run the above code, and you will see the following output.

val + VAL + Val = 18