# C1.WPF.Binding.C1CalcEngine ## Content

C1CalcEngine Class

Class that parses strings and returns Expression objects that can be evaluated.

C1CalcEngine

public class C1CalcEngine

Public Class C1CalcEngine

This class has three extensibility points:

Use the DataContext property to add an object's properties to the engine scope.

Use the RegisterFunction method to define custom functions.

Override the GetExternalObject method to add arbitrary variables to the engine scope.

Name	Description
C1CalcEngine()	Initializes a new instance of a C1CalcEngine.

Name	Description
CacheExpressions	Gets or sets whether the calc engine should keep a cache with parsed expressions.
CultureInfo	Gets or sets the CultureInfo to use when parsing numbers and dates.
DataContext	Gets or sets the DataContext for this C1CalcEngine.
Functions	Gets the dictionary that contains function definitions.
IdentifierChars	Gets or sets a string that specifies special characters that are valid for identifiers.
OptimizeExpressions	Gets or sets whether the calc engine should optimize expressions when they are parsed.
Variables	Gets the dictionary that contains simple variables (not in the DataContext).

Name	Description
Evaluate(string)	Evaluates a string.
GetExternalObject(string)	Gets an external object based on an identifier.
Parse(string)	Parses a string into an Expression.
RegisterFunction(string, int, CalcEngineFunction)	Registers a function that can be evaluated by this C1CalcEngine.
RegisterFunction(string, int, int, CalcEngineFunction)	Registers a function that can be evaluated by this C1CalcEngine.