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Telerik.Web.Data.Extensions.QueryableExtensions

Holds extension methods for System.Linq.IQueryable .

Inheritance Hierarchy

  • System.Object
  • Telerik.Web.Data.Extensions.QueryableExtensions

Methods

Aggregate

Calculates the results of given aggregates functions on a sequence of elements.

Parameters

source System.Linq.IQueryable

An whose elements will
be used for aggregate calculation.

aggregateFunctions System.Collections.Generic.IEnumerable{Telerik.Web.Data.AggregateFunction}

The aggregate functions.

Returns

Telerik.Web.Data.AggregateResultCollection Collection of s calculated for each function.

Aggregate

Calculates the results of a given aggregate function on a sequence of elements.

Parameters

source System.Linq.IQueryable

An whose elements will
be used for aggregate calculation.

aggregateFunction Telerik.Web.Data.AggregateFunction

The aggregate function.

Returns

Telerik.Web.Data.AggregateResultCollection Collection of s calculated for the function.

Count

Returns the number of elements in a sequence.

Parameters

source System.Linq.IQueryable

The that contains the elements to be counted.

Returns

System.Int32 The number of elements in the input sequence.

ElementAt

Returns the element at a specified index in a sequence.

Parameters

source System.Linq.IQueryable

An to return an element from.

index System.Int32

The zero-based index of the element to retrieve.

Returns

System.Object The element at the specified position in .

GroupBy

Groups the elements of a sequence according to a specified key selector function.

Parameters

source System.Linq.IQueryable

An whose elements to group.

keySelector System.Linq.Expressions.LambdaExpression

A function to extract the key for each element.

Returns

System.Linq.IQueryable An with items,
whose elements contains a sequence of objects and a key.

GroupBy

Groups the elements of a sequence according to a specified .

Parameters

source System.Linq.IQueryable

An whose elements to group.

groupDescriptors System.Collections.Generic.IEnumerable{Telerik.Web.Data.IGroupDescriptor}

The group descriptors used for grouping.

Returns

System.Linq.IQueryable An with items,
whose elements contains a sequence of objects and a key.

OrderBy

Sorts the elements of a sequence in ascending order according to a key.

Parameters

source System.Linq.IQueryable

A sequence of values to order.

keySelector System.Linq.Expressions.LambdaExpression

A function to extract a key from an element.

Returns

System.Linq.IQueryable An whose elements are sorted according to a key.

OrderBy

Calls

or depending on the .

Parameters

source System.Linq.IQueryable

The source.

keySelector System.Linq.Expressions.LambdaExpression

The key selector.

sortDirection System.Nullable{System.ComponentModel.ListSortDirection}

The sort direction.

Returns

System.Linq.IQueryable An whose elements are sorted according to a key.

OrderByDescending

Sorts the elements of a sequence in descending order according to a key.

Parameters

source System.Linq.IQueryable

A sequence of values to order.

keySelector System.Linq.Expressions.LambdaExpression

A function to extract a key from an element.

Returns

System.Linq.IQueryable An whose elements are sorted in descending order according to a key.

Select

Projects each element of a sequence into a new form.

Parameters

source System.Linq.IQueryable

A sequence of values to project.

selector System.Linq.Expressions.LambdaExpression

A projection function to apply to each element.

Returns

System.Linq.IQueryable An whose elements are the result of invoking a
projection selector on each element of .

Skip

Bypasses a specified number of elements in a sequence
and then returns the remaining elements.

Parameters

source System.Linq.IQueryable

An to return elements from.

count System.Int32

The number of elements to skip before returning the remaining elements.

Returns

System.Linq.IQueryable An that contains elements that occur
after the specified index in the input sequence.

Sort

Sorts the elements of a sequence using the specified sort descriptors.

Parameters

source System.Linq.IQueryable

A sequence of values to sort.

sortDescriptors System.Collections.Generic.IEnumerable{Telerik.Web.Data.SortDescriptor}

The sort descriptors used for sorting.

Returns

System.Linq.IQueryable An whose elements are sorted according to a .

Take

Returns a specified number of contiguous elements from the start of a sequence.

Parameters

source System.Linq.IQueryable

The sequence to return elements from.

count System.Int32

The number of elements to return.

Returns

System.Linq.IQueryable An that contains the specified number
of elements from the start of .

ToIList

Creates a from an where T is .

Parameters

source System.Linq.IQueryable

The to create a from.

Returns

System.Collections.IList A that contains elements from the input sequence.

Where

Filters a sequence of values based on a predicate.

Parameters

source System.Linq.IQueryable

An to filter.

predicate System.Linq.Expressions.Expression

A function to test each element for a condition.

Returns

System.Linq.IQueryable An that contains elements from the input sequence
that satisfy the condition specified by .

Where

Filters a sequence of values based on a collection of .

Parameters

source System.Linq.IQueryable

The source.

filterDescriptors System.Collections.Generic.IEnumerable{Telerik.Web.Data.IFilterDescriptor}

The filter descriptors.

Returns

System.Linq.IQueryable An that contains elements from the input sequence
that satisfy the conditions specified by each filter descriptor in .