EqExpression class

Represents common expression object.

public abstract class Korzh.EasyQuery.EqExpression

Fields

Type	Name	Description
String	text	This field contains expression’s text

Properties

Type	Name	Description
String	CustomFunc	Gets the custom func for expression if defined
DataType	DataType	Gets or sets the data type.
String	Hint	Gets or sets the expression hint.
Boolean	IsAggregate	Gets a value indicating whether this expression is aggregate.
DataKind	Kind	Gets the expression kind.
Type	SystemType	Gets the system type for this expreesion (it’s used in LINQ query builder)
String	Text	Gets or sets the expression text used for visual representation.
String	TypeName	Non-static version of Korzh.EasyQuery.EqExpression.STypeName property.
String	Value	Gets or sets the value of expression.

Events

Type	Name	Description
EventHandler	ContentChange	This event is raised after expression was changed

Methods

Type	Name	Description
void	AssignExpr(EqExpression expr)	Assigns some expression to this one. This method just does nothing in the base class but can perform some actions in Expression descendants.
void	ContentChanged()	Invoke ContentChange event
void	LoadFromJsonDict(JsonDict dict)	Loads expression from dictionary object (used when we load query from JSON).
void	LoadFromXmlReader(XmlReader reader)	Loads expression from XML.
void	OnContentChange(EventArgs e)	Raises the ContentChange event.
void	SaveToJsonDict(JsonDict dict)	Saves expression’s properties to dictionary (used to serialize expression into JSON)
void	SaveToJsonDictCore(JsonDict dict)	Saves expression’s properties to dictionary (used to serialize expression into JSON) This is an abstract method which should be overridden in descendant classes.
void	SaveToXmlWriter(XmlWriter writer, String tagName)	Saves expression to XML writer.
void	SaveToXmlWriter(XmlWriter writer)	Saves expression to XML writer.
void	SetContent(String val, String txt)	Sets the content of the expression (both its value and text).
void	SetContentSilent(String val, String txt)	Sets the content of the expression silently (without calling ContentChanged event).
void	WriteXmlTagStart(XmlWriter writer)	Writes the expression XML tag start.
void	WriteXmlTagStart(XmlWriter writer, String tagName)	Writes the expression XML tag start.

Static Fields

Type	Name	Description
Dictionary<String, IExpressionCreator>	Creators

Static Properties

Type	Name	Description
String	STypeName	Gets the name of the expression type.
String	XmlTagName	Gets the name of the XML tag used for representation of Expression (an all its descendants) object in XML files.

Static Methods

Type	Name	Description
String	ApplyCustomFunc(String func, String expr)	Applies the custom function.
EqExpression	Create(String exprType, DataModel model)	Creates the expression instance of specified type.
Boolean	RegisterType(String type, IExpressionCreator creator)	Registers new type of expression.