Class EnumerableExtensions

Provides extension methods for performing basic operations such as sum, average, min , max and sorting on enumerable collections.

Inheritance

System.Object

EnumerableExtensions

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Syncfusion.DataSource.Extensions

Assembly: Syncfusion.DataSource.WinForms.dll

Syntax

public static class EnumerableExtensions

Methods

Average(IEnumerable<Int16>)

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	Represents the queryable source.

Returns

Type	Description
System.Double	Returns the double value.

Average(IEnumerable<Nullable<Int16>>)

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	Represents the queryable source.

Returns

Type	Description
System.Nullable<System.Double>	Returns the double value.

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

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Int16>	selector	Represents the function expression.

Returns

Type	Description
System.Double	Returns the double value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Nullable<System.Int16>>	selector	Represents the function expression.

Returns

Type	Description
System.Nullable<System.Double>	Returns the double value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	Represents the function expression.

Returns

Type	Description
System.Double	Returns the double value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the average of values.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	Represents the function expression.

Returns

Type	Description
System.Nullable<System.Double>	Returns the double value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

GetElementType(IEnumerable)

Gets the element type.

Declaration

public static Type GetElementType(this IEnumerable source)

Parameters

Type	Name	Description
System.Collections.IEnumerable	source	Represents the enumerable source.

Returns

Type	Description
System.Type	Returns the source type.

GetItemPropertyInfo(IEnumerable)

Gets the property info.

Declaration

public static PropertyInfo GetItemPropertyInfo(this IEnumerable list)

Parameters

Type	Name	Description
System.Collections.IEnumerable	list	Represents the enumerable list.

Returns

Type	Description
System.Reflection.PropertyInfo	Returns the property info.

Max(IEnumerable<Int16>)

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	Represents the queryable source.

Returns

Type	Description
System.Int16	Returns the maximum value.

Max(IEnumerable<Nullable<Int16>>)

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	Represents the queryable source.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the maximum value.

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

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Int16>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the maximum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Nullable<System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the maximum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the maximum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the maximum value.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the maximum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

Min(IEnumerable<Int16>)

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	Represents the queryable source.

Returns

Type	Description
System.Int16	Returns the minimum value.

Min(IEnumerable<Nullable<Int16>>)

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	Represents the queryable source.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the minimum value.

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

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Int16>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the minimum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Nullable<System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the minimum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the minimum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the minimum value.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the minimum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the sorting 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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Gets the sorting order.

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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.
System.Collections.Generic.IComparer<System.Object>	comparer	Represents the comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Gets the sorting order as descending.

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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Sorts the items in descending order.

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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.
System.Collections.Generic.IComparer<System.Object>	comparer	Represents the comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

Sum(IEnumerable<Int16>)

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Int16>	source	Represents the queryable source.

Returns

Type	Description
System.Int16	Returns the sum value.

Sum(IEnumerable<Nullable<Int16>>)

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Nullable<System.Int16>>	source	Represents the queryable source.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the sum value.

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

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Int16>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the sum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<TSource>	source	Represents the queryable source.
System.Func<TSource, System.Nullable<System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the sum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Int16>>	selector	Represents the expression function.

Returns

Type	Description
System.Int16	Returns the sum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Determines the sum of values.

Declaration

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

Parameters

Type	Name	Description
System.Linq.IQueryable<TSource>	source	Represents the queryable source.
System.Linq.Expressions.Expression<System.Func<TSource, System.Nullable<System.Int16>>>	selector	Represents the expression function.

Returns

Type	Description
System.Nullable<System.Int16>	Returns the sum value.

Type Parameters

Name	Description
TSource	Represents the generic type parameter.

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

Gets the sorting 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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Gets the sorting order.

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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.
System.Collections.Generic.IComparer<System.Object>	comparer	Represents the comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Gets the sorting 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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.

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

Gets the sorting order.

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	Represents the collection entity.
System.String	propertyName	Represents the property name.
System.Func<System.String, System.Object, System.Object>	getFunc	Represents the function.
System.Collections.Generic.IComparer<System.Object>	comparer	Represents the comparer.

Returns

Type	Description
System.Collections.Generic.IEnumerable<T>	Returns the enumerable collection.

Type Parameters

Name	Description
T	Represents the generic type parameter.