Class FormulaParserManager

Provides access to various functionality regarding excel formula evaluation.

Inheritance

System.Object

FormulaParserManager

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: OfficeOpenXml.FormulaParsing

Assembly: EPPlus.dll

Syntax

public class FormulaParserManager

Methods

AddOrReplaceFunction(String, ExcelFunction)

If the supplied functionName does not exist, the supplied functionImpl implementation will be added to the formula parser. If it exists, the existing function will be replaced by the supplied functionImpl

Declaration

public void AddOrReplaceFunction(string functionName, ExcelFunction functionImpl)

Parameters

Type	Name	Description
System.String	functionName
ExcelFunction	functionImpl

AttachLogger(IFormulaParserLogger)

Attaches a logger to the FormulaParser.

Declaration

public void AttachLogger(IFormulaParserLogger logger)

Parameters

Type	Name	Description
IFormulaParserLogger	logger	An instance of IFormulaParserLogger

AttachLogger(FileInfo)

Attaches a logger to the formula parser that produces output to the supplied logfile.

Declaration

public void AttachLogger(FileInfo logfile)

Parameters

Type	Name	Description
System.IO.FileInfo	logfile

CopyFunctionsFrom(ExcelWorkbook)

Copies existing ExcelFunction´s from one workbook to another.

Declaration

public void CopyFunctionsFrom(ExcelWorkbook otherWorkbook)

Parameters

Type	Name	Description
ExcelWorkbook	otherWorkbook	The workbook containing the forumulas to be copied.

DetachLogger()

Detaches any attached logger from the formula parser.

Declaration

public void DetachLogger()

GetImplementedFunctionNames()

Returns an enumeration of the names of all functions implemented, both the built in functions and functions added using the LoadFunctionModule method of this class.

Declaration

public IEnumerable<string> GetImplementedFunctionNames()

Returns

Type	Description
System.Collections.Generic.IEnumerable<System.String>	Function names in lower case

GetImplementedFunctions()

Returns an enumeration of all implemented functions, including the implementing ExcelFunction instance.

Declaration

public IEnumerable<KeyValuePair<string, ExcelFunction>> GetImplementedFunctions()

Returns

Type	Description
System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<System.String, ExcelFunction>>	An enumeration of System.Collections.Generic.KeyValuePair`2, where the key is the function name

LoadFunctionModule(IFunctionModule)

Loads a module containing custom functions to the formula parser. By using this method you can add your own implementations of Excel functions, by implementing a IFunctionModule.

Declaration

public void LoadFunctionModule(IFunctionModule module)

Parameters

Type	Name	Description
IFunctionModule	module	A IFunctionModule containing ExcelFunctions.

Parse(String)

Parses the supplied formula and returns the result.

Declaration

public object Parse(string formula)

Parameters

Type	Name	Description
System.String	formula	The formula to parse

Returns

Type	Description
System.Object	The result of the parsed formula

Parse(String, String)

Parses the supplied formula and returns the result.

Declaration

public object Parse(string formula, string address)

Parameters

Type	Name	Description
System.String	formula	The formula to parse
System.String	address	The full address in the workbook where the formula should be parsed. Example: you might want to parse the formula of a conditional format, then this should be the address of the cell where the conditional format resides.

Returns

Type	Description
System.Object	The result of the parsed formula