Class EnumerableExtensions

Inheritance

System.Object

EnumerableExtensions

Namespace: Syncfusion.Data.Extensions

Assembly: Syncfusion.Data.Portable.dll

Syntax

public static class EnumerableExtensions : Object

Methods

Average(IEnumerable<Int16>)

Gets the average of all System.Double values from the specified source.

Declaration

public static double Average(this IEnumerable<short> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	The specified source for which the average to be calculated

Returns

Type	Description
System.Double	The average of all System.Double values from the specified source.

Average(IEnumerable<Nullable<Int16>>)

Gets the average of all System.Double? values from the specified source.

Declaration

public static Nullable<double> Average(this IEnumerable<Nullable<short>> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	The specified source for which the average to be calculated.

Returns

Type	Description
System.Nullable<System.Double>	The average of all System.Double? values from the specified source.

Average<TSource>(IEnumerable<TSource>, Func<TSource, Int16>)

Gets the average of all System.Double values from the specified System.Collections.IEnumerable source using selector.

Declaration

public static double Average<TSource>(this IEnumerable<TSource> source, Func<TSource, short> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source for which the average to be calculated
System.Func<TSource, System.Int16>	selector	The function that retrieves all System.Double values from the specified source

Returns

Type	Description
System.Double	The average of all System.Double values from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Average<TSource>(IEnumerable<TSource>, Func<TSource, Nullable<Int16>>)

Gets the average of all System.Double? values from the specified System.Collections.IEnumerable source using selector.

Declaration

public static Nullable<double> Average<TSource>(this IEnumerable<TSource> source, Func<TSource, Nullable<short>> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source for which the average to be calculated.
System.Func<TSource, System.Nullable<System.Int16>>	selector	The function that retrieves all System.Double? values from the specified source.

Returns

Type	Description
System.Nullable<System.Double>	The average of all System.Double? values from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Average<TSource>(IQueryable<TSource>, Expression<Func<TSource, Int16>>)

Gets the average of all System.Double values from the specified System.Linq.IQueryable source using selector.

Declaration

public static double Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, short>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source for which the average to be calculated
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	The function that retrieves all System.Double values from the specified source

Returns

Type	Description
System.Double	The average of all System.Double values from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

Average<TSource>(IQueryable<TSource>, Expression<Func<TSource, Nullable<Int16>>>)

Gets the average of all System.Double? values from the specified System.Linq.IQueryable source using selector.

Declaration

public static Nullable<double> Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, Nullable<short>>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source for which the average to be calculated.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	The function that retrieves all System.Double? values from the specified source.

Returns

Type	Description
System.Nullable<System.Double>	The average of all System.Double? values from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

GetElementType(IEnumerable)

Gets the Element type of the specified source.

Declaration

public static Type GetElementType(this IEnumerable source)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source

Returns

Type	Description
System.Type	The Element type of the specified source.

GetGenericSourceType(IEnumerable)

Gets the generic source type of the specified source.

Declaration

public static Type GetGenericSourceType(IEnumerable source)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source

Returns

Type	Description
System.Type	The generic source type of the specified source.

GetItemPropertyInfo(IEnumerable)

Gets the Item property informaation of the specified list.

Declaration

public static PropertyInfo GetItemPropertyInfo(this IEnumerable list)

Parameters

Type	Name	Description
System.Collections.IEnumerable	list

Returns

Type	Description
System.Reflection.PropertyInfo	The Item property informaation of the specified list.

GetItemType(IEnumerable, Boolean)

Gets the item type of the source.

Declaration

public static Type GetItemType(this IEnumerable source, bool useRepresentativeItem)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source
System.Boolean	useRepresentativeItem

Returns

Type	Description
System.Type	The item type of the source.

GetParallelQuery(IEnumerable, Type)

Gets the parallel sequence of the specified source.

Declaration

public static ParallelQuery GetParallelQuery(this IEnumerable source, Type sourceType = null)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source
System.Type	sourceType

Returns

Type	Description
System.Linq.ParallelQuery	the parallel sequence of the specified source.

GetParallelQueryFor<T>(IEnumerable)

Gets the parallel query of the specified source.

Declaration

public static ParallelQuery<T> GetParallelQueryFor<T>(IEnumerable source)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source

Returns

Type	Description
System.Linq.ParallelQuery<T>	The parallel query of the specified source.

Type Parameters

Name
T

IndexOf<T>(IEnumerable<T>, T)

Gets the index of the specified value in the source.

Declaration

public static int IndexOf<T>(this IEnumerable<T> source, T value)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	source
T	value

Returns

Type	Description
System.Int32	the index of the specified value in the source.

Type Parameters

Name
T

InvokeParallelExecution<T>(IEnumerable, Predicate<Object>)

Creates a System.Linq.ParallelQuery for the specified source.

Declaration

public static ParallelQuery InvokeParallelExecution<T>(IEnumerable source, Predicate<object> func)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source	The specified Source.
System.Predicate<System.Object>	func	The func that ensures the criteria to create a System.Linq.ParallelQuery.

Returns

Type	Description
System.Linq.ParallelQuery	The System.Linq.ParallelQuery for the specified source.

Type Parameters

Name
T

Max(IEnumerable<Int16>)

Gets the maximum value of System.Int16 from the specified System.Collections.IEnumerable source.

Declaration

public static short Max(this IEnumerable<short> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	The specified source from which the maximum value to be found.

Returns

Type	Description
System.Int16	The maximum value of System.Int16 from the specified System.Collections.IEnumerable source.

Max(IEnumerable<Nullable<Int16>>)

Gets the maximum value of System.Int16? from the specified source.

Declaration

public static Nullable<short> Max(this IEnumerable<Nullable<short>> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	The specified source from which the maximum value to be found.

Returns

Type	Description
System.Nullable<System.Int16>	The maximum value of System.Int16? from the specified source.

Max<TSource>(IEnumerable<TSource>, Func<TSource, Int16>)

Gets the maximum value of System.Int16 from the specified System.Collections.IEnumerable source using selector.

Declaration

public static short Max<TSource>(this IEnumerable<TSource> source, Func<TSource, short> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source from which the maximum value to be found.
System.Func<TSource, System.Int16>	selector	The function that retrieves all System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The maximum value of System.Int16 from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Max<TSource>(IEnumerable<TSource>, Func<TSource, Nullable<Int16>>)

Gets the maximum value of System.Int16? from the specified System.Collections.IEnumerable source using selector.

Declaration

public static Nullable<short> Max<TSource>(this IEnumerable<TSource> source, Func<TSource, Nullable<short>> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source from which the maximum value to be found.
System.Func<TSource, System.Nullable<System.Int16>>	selector	The function that retrieves all System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The maximum value of System.Int16? from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Max<TSource>(IQueryable<TSource>, Expression<Func<TSource, Int16>>)

Gets the maximum value of System.Int16 from the specified System.Linq.IQueryable source using selector.

Declaration

public static short Max<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, short>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source from which the maximum value to be found.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	The function that retrieves all System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The maximum value of System.Int16 from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

Max<TSource>(IQueryable<TSource>, Expression<Func<TSource, Nullable<Int16>>>)

Gets the maximum value of System.Int16? from the specified System.Linq.IQueryable source using selector.

Declaration

public static Nullable<short> Max<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, Nullable<short>>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source from which the maximum value to be found.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	The function that retrieves all System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The maximum value of System.Int16? from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

Min(IEnumerable<Int16>)

Gets the minimum of System.Int16 value from the specified System.Collections.IEnumerable source.

Declaration

public static short Min(this IEnumerable<short> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	The specified source from which the minimum value to be found.

Returns

Type	Description
System.Int16	The minimum of System.Int16 value from the specified System.Collections.IEnumerable source.

Min(IEnumerable<Nullable<Int16>>)

Gets the minimum value of System.Int16? from the specified source.

Declaration

public static Nullable<short> Min(this IEnumerable<Nullable<short>> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	The specified source from which the minimum value to be found.

Returns

Type	Description
System.Nullable<System.Int16>	The minimum value of System.Int16? from the specified source.

Min<TSource>(IEnumerable<TSource>, Func<TSource, Int16>)

Gets the minimum value of System.Int16 from the specified System.Collections.IEnumerable source using selector.

Declaration

public static short Min<TSource>(this IEnumerable<TSource> source, Func<TSource, short> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source from which the minimum value to be found.
System.Func<TSource, System.Int16>	selector	The function that retrieves all System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The minimum value of System.Int16 from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Min<TSource>(IEnumerable<TSource>, Func<TSource, Nullable<Int16>>)

Gets the minimum value of System.Int16? from the specified System.Collections.IEnumerable source using selector.

Declaration

public static Nullable<short> Min<TSource>(this IEnumerable<TSource> source, Func<TSource, Nullable<short>> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source from which the minimum value to be found.
System.Func<TSource, System.Nullable<System.Int16>>	selector	The function that retrieves all System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The minimum of value System.Int16? from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Min<TSource>(IQueryable<TSource>, Expression<Func<TSource, Int16>>)

Gets the minimum value of System.Int16 from the specified System.Linq.IQueryable source using selector.

Declaration

public static short Min<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, short>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source from which the minimum value to be found.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	The function that retrieves all System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The minimum value of System.Int16 from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

Min<TSource>(IQueryable<TSource>, Expression<Func<TSource, Nullable<Int16>>>)

Gets the minimum value of System.Int16? from the specified System.Linq.IQueryable source using selector.

Declaration

public static Nullable<short> Min<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, Nullable<short>>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source from which the minimum value to be found.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	The function that retrieves all System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The minimum value of System.Int16? from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

OrderBy<T>(IEnumerable<T>, String, Func<String, Object, Object>)

Sorts the elements of a sequence in ascending order.

Declaration

public static IEnumerable<T> OrderBy<T>(this IEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in ascending order according to a key.

Type Parameters

Name
T

OrderBy<T>(IEnumerable<T>, String, Func<String, Object, Object>, IComparer<Object>)

Sorts the elements of a sequence in ascending order by using specified comparer.

Declaration

public static IEnumerable<T> OrderBy<T>(this IEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc, IComparer<object> comparer)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.
System.Collections.Generic.IComparer<System.Object>	comparer	The comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in ascending order according to a key.

Type Parameters

Name
T

OrderByDescending<T>(IEnumerable<T>, String, Func<String, Object, Object>)

Sorts the elements of a sequence in descending order.

Declaration

public static IEnumerable<T> OrderByDescending<T>(this IEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in descending order according to a key.

Type Parameters

Name
T

OrderByDescending<T>(IEnumerable<T>, String, Func<String, Object, Object>, IComparer<Object>)

Sorts the elements of a sequence in descending order by using specified comparer.

Declaration

public static IEnumerable<T> OrderByDescending<T>(this IEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc, IComparer<object> comparer)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.
System.Collections.Generic.IComparer<System.Object>	comparer	The comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in descending order according to a key.

Type Parameters

Name
T

Sum(IEnumerable<Int16>)

Gets the sum of all System.Int16 values from the specified source.

Declaration

public static short Sum(this IEnumerable<short> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	The specified source for which the sum to be calculated.

Returns

Type	Description
System.Int16	The sum of all System.Int16 values from the specified source.

Sum(IEnumerable<Nullable<Int16>>)

Gets the sum of all System.Int16? values from the specified source

Declaration

public static Nullable<short> Sum(this IEnumerable<Nullable<short>> source)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	The specified source for which the sum to be calculated.

Returns

Type	Description
System.Nullable<System.Int16>	the sum of all System.Int16? values from the specified source

Sum<TSource>(IEnumerable<TSource>, Func<TSource, Int16>)

Gets the sum of all System.Int16 values from the specified System.Collections.IEnumerable source using selector.

Declaration

public static short Sum<TSource>(this IEnumerable<TSource> source, Func<TSource, short> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source for which the sum to be calculated.
System.Func<TSource, System.Int16>	selector	The function that retrieves System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The sum of all System.Int16 values from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Sum<TSource>(IEnumerable<TSource>, Func<TSource, Nullable<Int16>>)

Gets the sum of all System.Int16? values from the specified System.Collections.IEnumerable source using selector.

Declaration

public static Nullable<short> Sum<TSource>(this IEnumerable<TSource> source, Func<TSource, Nullable<short>> selector)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	The specified source for which the sum to be calculated.
System.Func<TSource, System.Nullable<System.Int16>>	selector	The function that retrieves System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The sum of all System.Int16? values from the specified System.Collections.IEnumerable source using selector.

Type Parameters

Name
TSource

Sum<TSource>(IQueryable<TSource>, Expression<Func<TSource, Int16>>)

Gets the sum of all System.Int16 values from the specified System.Linq.IQueryable source using selector.

Declaration

public static short Sum<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, short>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source for which the sum to be calculated.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	The function that retrieves System.Int16 values from the specified source.

Returns

Type	Description
System.Int16	The sum of all System.Int16 values from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

Sum<TSource>(IQueryable<TSource>, Expression<Func<TSource, Nullable<Int16>>>)

Gets the sum of all System.Int16? values from the specified System.Linq.IQueryable source using selector.

Declaration

public static Nullable<short> Sum<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, Nullable<short>>> selector)

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	The specified source for which the sum to be calculated.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	The function that retrieves System.Int16? values from the specified source.

Returns

Type	Description
System.Nullable<System.Int16>	The sum of all System.Int16? values from the specified System.Linq.IQueryable source using selector.

Type Parameters

Name
TSource

ThenBy<T>(IOrderedEnumerable<T>, String, Func<String, Object, Object>)

Performs a subsequent ordering of the elements in a sequence in ascending order.

Declaration

public static IEnumerable<T> ThenBy<T>(this IOrderedEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc)

Parameters

Type	Name	Description
System.Linq.IOrderedEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in ascending order according to a key.

Type Parameters

Name
T

ThenBy<T>(IOrderedEnumerable<T>, String, Func<String, Object, Object>, IComparer<Object>)

Performs a subsequent ordering of the elements in a sequence in ascending order by using specified comparer.

Declaration

public static IEnumerable<T> ThenBy<T>(this IOrderedEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc, IComparer<object> comparer)

Parameters

Type	Name	Description
System.Linq.IOrderedEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.
System.Collections.Generic.IComparer<System.Object>	comparer	The comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in ascending order according to a key.

Type Parameters

Name
T

ThenByDescending<T>(IOrderedEnumerable<T>, String, Func<String, Object, Object>)

Performs a subsequent ordering of the elements in a sequence in descending order.

Declaration

public static IEnumerable<T> ThenByDescending<T>(this IOrderedEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc)

Parameters

Type	Name	Description
System.Linq.IOrderedEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in descending order according to a key.

Type Parameters

Name
T

ThenByDescending<T>(IOrderedEnumerable<T>, String, Func<String, Object, Object>, IComparer<Object>)

Performs a subsequent ordering of the elements in a sequence in descending by using specified comparer.

Declaration

public static IEnumerable<T> ThenByDescending<T>(this IOrderedEnumerable<T> entities, string propertyName, Func<string, object, object> getFunc, IComparer<object> comparer)

Parameters

Type	Name	Description
System.Linq.IOrderedEnumerable<T>	entities	The source.
System.String	propertyName	The property name.
System.Func<System.String, System.Object, System.Object>	getFunc	The get func.
System.Collections.Generic.IComparer<System.Object>	comparer	The comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	An System.Linq.IOrderedEnumerable<> whose elements are sorted in descending order according to a key.

Type Parameters

Name
T