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 .