Class TypeExtensions

Static extension helper methods on Type.

Inheritance

Object

TypeExtensions

Namespace: actionETL

Assembly: actionETL.dll

Syntax

public static class TypeExtensions

Methods

DisplayName(Type)

The display name of a type, which in several cases will be shorter and more readable than Type.FullName.

Declaration

public static string DisplayName(this Type type)

Parameters

Type	Name	Description
Type	type	The type.

Returns

Type	Description
String	A type name, which in the following cases will be shortened: Nullable System.Boolean? Generic System.Collections.Generic.List<System.Boolean> Array System.Boolean[], with commas in the brackets for multi-dimensional arrays Other types will return FullName.

Exceptions

Type	Condition
ArgumentNullException	type

GetFieldsAndPropertiesInOrder(Type, BindingFlags)

Gets the fields and properties of a single type, in a well defined order, either via reflection, or from a cache if the type has been queried previously.

Note that while this would include a member that is a struct, it would not include the members inside that struct. Also see TypeRowSchema, which does include columns in column schemas (i.e. inside embedded struct members).

The order of the returned members is controlled with the OrderAttribute, using an ordering index:

OrderAttribute with index: The index is explicitly provided. It must be in the range: [0, 9999], [20000,29999], [40000,49999], or [60000,69999].

OrderAttribute without index: The member will automatically get an index and be ordered on
the declaration order in the source file. This allows managing the order by simply moving the members around in the row class. Base class members will come before derived class members, and for any partial classes, the members are first sorted on the filename from CallerFilePathAttribute. By default they will get an index in the range [10000,19999], or in the range [50000,59999] if setting afterAlphabetical = true.

No OrderAttribute: These members will automatically get an index in the [30000,39999] range, in member name (ordinal case sensitive) alphabetical order.

Declaration

public static IReadOnlyList<MemberInfo> GetFieldsAndPropertiesInOrder(this Type type, BindingFlags bindingFlags)

Parameters

Type	Name	Description
Type	type	The type.
BindingFlags	bindingFlags	The binding flags that specifies which members to include. E.g. use BindingFlags.Instance | BindingFlags.Public to get all public instance members.

Returns

Type	Description
IReadOnlyList<MemberInfo>	A MemberInfo readonly list with all matching fields and properties of the specified type, or an empty list if no matches found.

Exceptions

Type	Condition
ArgumentNullException	type

See Also

OrderAttribute

TypeRowSchema

IsAssignableTo<T>(Type)

Determines whether an instance of a specified type can be assigned from the current type instance. It does the same check as IsAssignableFrom(Type), except the types have swapped places (and this one uses generics).

Declaration

public static bool IsAssignableTo<T>(this Type fromType)

Parameters

Type	Name	Description
Type	fromType	The 'from' type to check.

Returns

Type

Description

Boolean

true if any of the following conditions is true: T and the current instance represent the same type The current instance is derived either directly or indirectly from T T is an interface that the current instance implements The current instance is a generic type parameter, and T represents one of the constraints of the current instance The current instance represents a value type, and T represents Nullable{T} false if none of these conditions are true, or if c is null.

Type Parameters

Name	Description
T	The 'to' type to check.

Exceptions

Type	Condition
ArgumentNullException	fromType

IsNullableType(Type)

Determines whether a type is nullable, e.g. typeof(bool?).IsNullable() would return true.

Note: To check if a type is either a nullable value type or a reference type, use: if (default(T) == null) ....

Declaration

public static bool IsNullableType(this Type theValueType)

Parameters

Type	Name	Description
Type	theValueType	Type of the value.

Returns

Type	Description
Boolean	true if the type is nullable; otherwise, false.

Exceptions

Type	Condition
ArgumentNullException	theValueType