ExpressionInfo Class

The ExpressionInfo class stores, parses, and provides information about an expression. ExpressionInfo provides aggregates, global collections, etc., as well as information about the expected data type of the expression's result.

Inheritance

object

ExpressionInfo

CompoundExpressionInfo

ConstantExpressionInfo

FunctionExpressionInfo

IdentifierExpressionInfo

IntrinsicCastExpressionInfo

NewExpressionInfo

NothingExpressionInfo

Implements

IComparable

Namespace: GrapeCity.Enterprise.Data.Expressions

Assembly: MESCIUS.ActiveReports.Core.Data.ExpressionInfo.dll

Syntax

[TypeConverter(typeof(ExpressionInfo.ExpressionInfoConverter))]
public abstract class ExpressionInfo : IComparable

Constructors

Name	Description
ExpressionInfo(string, ExpressionResultType)	Initializes a new instance of the ExpressionInfo class.

Fields

Name	Description
EmptyString	Returns a reference to an ExpressionInfo object representing a constant empty string expression.
FalseConst	Returns a reference to an ExpressionInfo object representing a constant "False" string expression.
TrueConst	Returns a reference to an ExpressionInfo object representing a constant "True" string expression.

Properties

Name	Description
Expression	Gets the original expression string.
IsConstant	Gets a value indicating whether the ExpressionInfo object represents a constant value.
IsEmptyString	Get the value indicating if the expression represents an empty string.
IsExpression	Gets a value indicating whether the ExpressionInfo object represents a dynamic expression.
ResultType	Gets the expected data type of the expression evaluation result.

Methods

Name	Description
Children()	Returns the subexpressions that make up the given expression.
CompareTo(object)	Compares this instance to a specified object and returns an integer that indicates their relationship to one another.
Equals(ExpressionInfo)	Determines whether the specified ExpressionInfo object represents the same expression as this one.
Equals(object)	Overloaded. Determines whether the specified ExpressionInfo object represents the same expression as this one.
FromString(string, ExpressionResultType)	Creates an ExpressionInfo object from a string expression representation.
GenerateExpressionString()	Generates the expression string.
GetHashCode()	Serves as the default hash function.
Parse(string)	Parses the specified expression string and returns an ExpressionInfo object that represents the specified expression.
Parse(string, ExpressionResultType)	Parses the specified expression string and returns an ExpressionInfo object that represents the specified expression.
ToString()	Returns the string representation of this ExpressionInfo object.
Validate()	Checks if the expression contains any errors.

Operators

Name	Description
operator ==(ExpressionInfo, ExpressionInfo)	Determines whether the two ExpressionInfo objects represent the same expression.
implicit operator string(ExpressionInfo)	Defines an operator that allows implicit conversion from an ExpressionInfo to a string.
implicit operator ExpressionInfo(string)	Defines an operator that allows implicit conversion from a string to an ExpressionInfo.
operator !=(ExpressionInfo, ExpressionInfo)	Determines whether the specified ExpressionInfo objects represent different expressions.

Extension Methods

ExpressionExtensions.EvalConst(ExpressionInfo, bool)

ExpressionExtensions.EvalConstString(ExpressionInfo)

ExpressionExtensions.Evaluate(ExpressionInfo, IDynamicObject)

ExpressionExtensions.FindReference(ExpressionInfo, string)

ExpressionExtensions.HasRefsToId(ExpressionInfo, string)

ExpressionExtensions.IsFunc(ExpressionInfo, params string[])

ExpressionExtensions.IsId(ExpressionInfo, string)

ExpressionExtensions.IsNullOrEmpty(ExpressionInfo)

ExpressionExtensions.IsValid(ExpressionInfo)

ExpressionExtensions.Not(ExpressionInfo)

ExpressionExtensions.Replace(ExpressionInfo, Func<ExpressionInfo, ExpressionInfo>)

ExpressionExtensions.ReplaceIdentifier(ExpressionInfo, Func<string, string>)

EnumerableExtensions.Flatten<T>(T, Func<T, T>)

EnumerableExtensions.Flatten<T>(T, Func<T, IEnumerable<T>>)

EnumerableExtensions.Repeat<T>(T, int)

EnumerableExtensions.WithIndex<T>(T, int)