Class ReflectionExtensions

Contains a set of extensions for common reflection activities

Inheritance

object

ReflectionExtensions

Inherited Members

object.GetType()

object.MemberwiseClone()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

Namespace: LemonEdge.Utils

Assembly: LemonEdge.Utils.dll

Syntax

public static class ReflectionExtensions

Remarks

In general this includes methods for getting dynamic property setters and getters against unknown types. This is significantly faster than using GetValue(object) and SetValue(object, object)

Methods

ClearEventInvocations(object, string)

Set the given event eventName for a given object obj to null

Declaration

public static void ClearEventInvocations(this object obj, string eventName)

Parameters

Type	Name	Description
object	obj	The object that has an event you want to clean the invocation list for
string	eventName	The name of the event you want to clear against the object instance

GetEnumValueCustomAttributes<AttrType, EnumType>(EnumType)

Returns the apecified attribute AttrType against an enum instance of EnumType

Declaration

public static IEnumerable<AttrType> GetEnumValueCustomAttributes<AttrType, EnumType>(this EnumType value) where AttrType : Attribute where EnumType : Enum

Parameters

Type	Name	Description
EnumType	value	The enum value to return the specified attribute AttrType for

Returns

Type	Description
IEnumerable<AttrType>	An instance of the specified attribute against the specified enum instance

Type Parameters

Name	Description
AttrType	The type of attribute marked against all enum values
EnumType	The enum type to retrieve attributes from

GetFirstOrDefaultPropertyInfo(Type, Func<PropertyInfo, bool>)

Gets the properties for the type and returns the FirstOrDefault PropertyInfo that matches the predicate.

Declaration

public static PropertyInfo? GetFirstOrDefaultPropertyInfo(this Type type, Func<PropertyInfo, bool> predicate)

Parameters

Type	Name	Description
Type	type	This type.
Func<PropertyInfo, bool>	predicate	The predicate.

Returns

Type	Description
PropertyInfo	A PropertyInfo, or null.

GetGenericInstanceOfBaseType(Type, Type)

Given a type this returns the type generic type that implements the baseType this inherits

Declaration

public static Type GetGenericInstanceOfBaseType(this Type type, Type baseType)

Parameters

Type	Name	Description
Type	type	Finds what class this class implements of the generic specified base type. This type must inherit from basetype
Type	baseType	he type that has a generic argument(s) that you would like the whole type for

Returns

Type	Description
Type	The generic type of baseType that the type implements or inherits

Remarks

For example:

public class MyClass<T>
{
}

public class MyDecimalClass : MyClass<decimal> { }

public static Type GetMyDecimalClassType()
{
    return typeof(MyDecimalClass).GetGenericInstanceOfBaseType(typeof(MyClass<>));
}

Would return the MyClass<decimal> type

GetGenericTypeArgumentOfImplementedBaseClass(Type, Type)

Given a type that implements or inherits forGenericType that has a generic argument, this function will return the Type used as the generic argument for the forGenericType

Declaration

public static Type GetGenericTypeArgumentOfImplementedBaseClass(this Type type, Type forGenericType)

Parameters

Type	Name	Description
Type	type	The type that inherits or implements forGenericType
Type	forGenericType	The type that has a generic argument that you would like the generic type for

Returns

Type	Description
Type	The generic type argument for the forGenericType that the type implements or inherits

Remarks

For example:

public class MyClass<T>
{
}

public class MyDecimalClass : MyClass<decimal> { }

public static Type GetMyDecimalClassType()
{
    return typeof(MyDecimalClass).GetGenericTypeArgumentOfImplementedBaseClass(typeof(MyClass<>));
}

Would return the decimal type

GetNestedPropertyInfo(Type, string, string, bool)

Returns the PropertyInfo definition for the specified property against a property on this type. Given Entity.ParentProperty.NestedProperty, this returns NestedProperty's definition.

Declaration

public static PropertyInfo GetNestedPropertyInfo(this Type type, string parentPropertyName, string nestedPropertyName, bool throwIfMissing = true)

Parameters

Type	Name	Description
Type	type	The type that holds the specified property
string	parentPropertyName	The parent property that contains nestedPropertyName
string	nestedPropertyName	The property to return property info on
bool	throwIfMissing	Indicates if the property isn't found an ArgumentOutOfRangeException should be thrown, otherwise null is returned

Returns

Type	Description
PropertyInfo	The PropertyInfo for the specified nestedPropertyName property on this type

Exceptions

Type	Condition
ArgumentOutOfRangeException	If throwIfMissing is true and the specified property cant be found against the type, this exception is thrown

GetNullableType(Type)

Returns the generic type implementation for this type used for Nullable<T> implementation

Declaration

public static Type GetNullableType(this Type t)

Parameters

Type	Name	Description
Type	t	The type that implements Nullable<T>

Returns

Type	Description
Type	The generic type implementation of the Nullable<T> implementation of this type t

Exceptions

Type	Condition
ArgumentOutOfRangeException	If this type does not implement Nullable<T> then an exception is thrown

GetPropertyInfo(Type, string, bool)

Returns the PropertyInfo definition for the specified property against this type

Declaration

public static PropertyInfo? GetPropertyInfo(this Type type, string propName, bool throwIfMissing = true)

Parameters

Type	Name	Description
Type	type	The type that holds the specified property
string	propName	The property to return property info on
bool	throwIfMissing	Indicates if the property isn't found an ArgumentOutOfRangeException should be thrown, otherwise null is returned

Returns

Type	Description
PropertyInfo	The PropertyInfo for the specified propName property on this type

Exceptions

Type	Condition
ArgumentOutOfRangeException	If throwIfMissing is true and the specified property cant be found against the type, this exception is thrown

GetValue(Type, string, object)

Returns the value for the specified propertyName againt the specified item an instance of type type

Declaration

public static object GetValue(this Type type, string propertyName, object item)

Parameters

Type	Name	Description
Type	type	The type this property resides against that we want the value of
string	propertyName	The name of the property we want to return the value of
object	item	An instance of type type

Returns

Type	Description
object	The value of propertyName against the item instance

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

InheritsFromIncludingGeneric(Type, Type)

Indicates if the given type inherits from of implements the specified baseType including if that type has generic arguments

Declaration

public static bool InheritsFromIncludingGeneric(this Type type, Type baseType)

Parameters

Type	Name	Description
Type	type	The type you want to know if it inherits from baseType
Type	baseType	The type you want to know if type inherits from

Returns

Type	Description
bool	True if type inherits from baseType including if that type has generic arguments

InheritsFromIncludingGeneric<T>(Type)

Indicates if the given T inherits from of implements the specified type including if that type has generic arguments

Declaration

public static bool InheritsFromIncludingGeneric<T>(this Type type)

Parameters

Type	Name	Description
Type	type	The type you want to know if T inherits from

Returns

Type	Description
bool	True if T inherits from type including if that type has generic arguments

Type Parameters

Name	Description
T	The type you want to know if it inherits from type

InheritsFromType(Type, string)

Returns true if the specified type type inherits from a class called typeName

Declaration

public static bool InheritsFromType(this Type type, string typeName)

Parameters

Type	Name	Description
Type	type	The type to see if it inherits any class called typeName
string	typeName	The name of a type you want to see if the type type inherits

Returns

Type	Description
bool

IsNullable(Type)

Indicates if this type if nullable, as in is a type of Nullable<T>

Declaration

public static bool IsNullable(this Type t)

Parameters

Type	Name	Description
Type	t	The type to check to see if it is nullable or not

Returns

Type	Description
bool	True if this type is of the type Nullable<T>

SetValue(Type, string, object, object, bool)

Set the value for the specified propertyName to value againt the specified item an instance of type type

Declaration

public static void SetValue(this Type type, string propertyName, object item, object value, bool throwIfPropertyMissing = true)

Parameters

Type	Name	Description
Type	type	The type this property resides against that we want the value of
string	propertyName	The name of the property we want to return the value of
object	item	An instance of type type
object	value	The value to set for the propertyName against an item instance
bool	throwIfPropertyMissing

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

ToCodeTypeName(Type)

Used for auto code generation. Returns the name of a given type in c# style syntax

Declaration

public static string ToCodeTypeName(this Type type)

Parameters

Type	Name	Description
Type	type	The type to return a c# formatted type code for

Returns

Type	Description
string	The specified type in c# style coding

Remarks

For example List<int> would be returned as List<int> and not List'1Int

ToPropertyAccessorExpression<T, R>(PropertyInfo, int?, bool)

Returns a expression (for use with Linq and other technologies) of a function that given an instance of T will return the value of property p as type R

Declaration

public static Expression<Func<T, R>> ToPropertyAccessorExpression<T, R>(this PropertyInfo p, int? index = null, bool cast = true)

Parameters

Type	Name	Description
PropertyInfo	p	The property to return a value for
int?	index	If the property has an indexer this holds the index value to the property
bool	cast	Indicates if the value being returned should be cast to R or not

Returns

Type	Description
Expression<Func<T, R>>	An Expression<TDelegate> (for use with Linq and other technologies) of Func<T, TResult> that takes an instance of the object and returns the value for the specified p property

Type Parameters

Name	Description
T	The type of the item that will be passed to return the property value of p from
R	The return type from the property

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

ToPropertyAccessor<T>(PropertyInfo, int?)

Returns a function that given an instance of T will return the value of property p

Declaration

public static Func<T, object> ToPropertyAccessor<T>(this PropertyInfo p, int? index = null)

Parameters

Type	Name	Description
PropertyInfo	p	The property to return a value for
int?	index	If the property has an indexer this holds the index value to the property

Returns

Type	Description
Func<T, object>	An Func<T, TResult> that takes an instance of the object and returns the value for the specified p property

Type Parameters

Name	Description
T	The type of the item that will be passed to return the property value of p from

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

ToPropertyAccessor<T>(PropertyInfo, Type, int?)

Returns a function that given an instance of T will return the value of property p

Declaration

public static Func<T, object> ToPropertyAccessor<T>(this PropertyInfo p, Type actualTypeThatImplementsT, int? index = null)

Parameters

Type	Name	Description
PropertyInfo	p	The property to return a value for
Type	actualTypeThatImplementsT	The actual type that implements the property p. This may not be T if this type inherits or implements T
int?	index	If the property has an indexer this holds the index value to the property

Returns

Type	Description
Func<T, object>	An Func<T, TResult> that takes an instance of the object and returns the value for the specified p property

Type Parameters

Name	Description
T	The type of the item that will be passed to return the property value of p from

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

ToPropertyAccessor<T, R>(PropertyInfo, int?)

Returns a function that given an instance of T will return the value of property p as type R

Declaration

public static Func<T, R> ToPropertyAccessor<T, R>(this PropertyInfo p, int? index = null)

Parameters

Type	Name	Description
PropertyInfo	p	The property to return a value for
int?	index	If the property has an indexer this holds the index value to the property

Returns

Type	Description
Func<T, R>	An Func<T, TResult> that takes an instance of the object and returns the value for the specified p property

Type Parameters

Name	Description
T	The type of the item that will be passed to return the property value of p from
R	The return type from the property

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)

ToPropertySetter<T>(PropertyInfo, int?)

Returns an action that can be used to set the property value for the specified propInfo against an instance of the type

Declaration

public static Action<T, object> ToPropertySetter<T>(this PropertyInfo propInfo, int? index = null)

Parameters

Type	Name	Description
PropertyInfo	propInfo	The propertyinfo which describes the property you want to be able to set the value against
int?	index	If the property has an indexer this holds the index value to the property

Returns

Type	Description
Action<T, object>	An Action<T1, T2> that takes an instance of the object and the value to set the specified propInfo property to

Type Parameters

Name	Description
T	The type of object that you want to set a property value against

Remarks

This is significantly faster than using GetValue(object) and SetValue(object, object)