DataServiceCollection<T> Class
Definition
Important
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Represents a dynamic entity collection that provides notifications when items get added, removed, or when the list is refreshed.
generic <typename T>
public ref class DataServiceCollection : System::Collections::ObjectModel::ObservableCollection<T>public class DataServiceCollection<T> : System.Collections.ObjectModel.ObservableCollection<T>type DataServiceCollection<'T> = class
inherit ObservableCollection<'T>Public Class DataServiceCollection(Of T)
Inherits ObservableCollection(Of T)Type Parameters
- T
An entity type.
- Inheritance
Examples
The following example is from the code-behind page for an Extensible Application Markup Language (XAML) page that defines the SalesOrders window in WPF. When the window is loaded, an DataServiceCollection<T> is created based on the result of a query that returns customers with related objects, filtered by country/region. This result is bound to the DataContext property of the StackPanel that is the root layout control for the WPF window.
using System;
using System.Data.Services.Client;
using System.Linq;
using System.Windows;
using NorthwindClient.Northwind;
namespace NorthwindClient
{
public partial class CustomerOrdersWpf : Window
{
private NorthwindEntities context;
private DataServiceCollection<Customer> trackedCustomers;
private const string customerCountry = "Germany";
private const string svcUri = "http://localhost:12345/Northwind.svc/";
public CustomerOrdersWpf()
{
//InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
try
{
// Initialize the context for the data service.
context = new NorthwindEntities(new Uri(svcUri));
// Create a LINQ query that returns customers with related orders.
var customerQuery = from cust in context.Customers.Expand("Orders")
where cust.Country == customerCountry
select cust;
// Create a new collection for binding based on the LINQ query.
trackedCustomers = new DataServiceCollection<Customer>(customerQuery);
// Bind the root StackPanel element to the collection;
// related object binding paths are defined in the XAML.
LayoutRoot.DataContext = trackedCustomers;
}
catch (DataServiceQueryException ex)
{
MessageBox.Show("The query could not be completed:\n" + ex.ToString());
}
catch (InvalidOperationException ex)
{
MessageBox.Show("The following error occurred:\n" + ex.ToString());
}
}
private void saveChangesButton_Click(object sender, RoutedEventArgs e)
{
// Save changes to the data service.
context.SaveChanges();
}
}
}
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Imports System.Data.Services.Client
Imports NorthwindClient.Northwind
Partial Public Class CustomerOrdersWpf
Inherits Window
Private context As NorthwindEntities
Private trackedCustomers As DataServiceCollection(Of Customer)
Private Const customerCountry As String = "Germany"
Private Const svcUri As String = "http://localhost:12345/Northwind.svc/"
Private Sub Window_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
Try
' Initialize the context for the data service.
context = New NorthwindEntities(New Uri(svcUri))
' Create a LINQ query that returns customers with related orders.
Dim customerQuery = From cust In context.Customers.Expand("Orders") _
Where cust.Country = customerCountry _
Select cust
' Create a new collection for binding based on the LINQ query.
trackedCustomers = New DataServiceCollection(Of Customer)(customerQuery)
' Bind the root StackPanel element to the collection
' related object binding paths are defined in the XAML.
Me.LayoutRoot.DataContext = trackedCustomers
Catch ex As DataServiceQueryException
MessageBox.Show("The query could not be completed:\n" + ex.ToString())
Catch ex As InvalidOperationException
MessageBox.Show("The following error occurred:\n" + ex.ToString())
End Try
End Sub
Private Sub saveChangesButton_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
' Save changes to the data service.
context.SaveChanges()
End Sub
End Class
The following is the XAML that defines the SalesOrders window in WPF for the previous example.
<Window x:Class="CustomerOrdersWpf"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
Height="423" Width="679" Loaded="Window_Loaded">
<StackPanel Orientation="Vertical" Height="Auto" Name="LayoutRoot" Width="Auto">
<Label Content="Customer ID" Margin="20,0,0,0" />
<ComboBox Name="customerIDComboBox" DisplayMemberPath="CustomerID" ItemsSource="{Binding}"
IsSynchronizedWithCurrentItem="True" SelectedIndex="0" Height="23" Width="120"
HorizontalAlignment="Left" Margin="20,0,0,0" VerticalAlignment="Center" />
<ListView ItemsSource="{Binding Path=Orders}" Name="ordersDataGrid" Margin="34,46,34,50">
<ListView.View>
<GridView AllowsColumnReorder="False" ColumnHeaderToolTip="Line Items">
<GridViewColumn DisplayMemberBinding="{Binding Path=OrderID, Mode=OneWay}"
Header="Order ID" Width="50"/>
<GridViewColumn DisplayMemberBinding="{Binding Path=OrderDate, Mode=TwoWay}"
Header="Order Date" Width="50"/>
<GridViewColumn DisplayMemberBinding="{Binding Path=Freight, Mode=TwoWay}"
Header="Freight Cost" Width="50"/>
</GridView>
</ListView.View>
</ListView>
<Button Name="saveChangesButton" Content="Save Changes" Click="saveChangesButton_Click"
Width="80" Height="30" Margin="450,0,0,0"/>
</StackPanel>
</Window>
Remarks
WCF Data Services provides the DataServiceCollection<T> class to support binding data to controls in client applications. This class inherits from the ObservableCollection<T> class, which implements the INotifyCollectionChanged interface and is the primary data binding mechanism for Windows Presentation Foundation (WPF) and Silverlight-based applications.
You can load an ObservableCollection<T> binding collection by using any collection that implements the IEnumerable<T> interface. Items loaded into the binding collection must implement the INotifyPropertyChanged interface. For more information, see Binding Data to Controls.
Constructors
Properties
| Continuation |
Gets a continuation object that is used to return the next set of paged results. |
| Count |
Gets the number of elements actually contained in the Collection<T>. (Inherited from Collection<T>) |
| Item[Int32] |
Gets or sets the element at the specified index. (Inherited from Collection<T>) |
| Items |
Gets a IList<T> wrapper around the Collection<T>. (Inherited from Collection<T>) |
Methods
| Add(T) |
Adds an object to the end of the Collection<T>. (Inherited from Collection<T>) |
| BlockReentrancy() |
Disallows reentrant attempts to change this collection. (Inherited from ObservableCollection<T>) |
| CheckReentrancy() |
Checks for reentrant attempts to change this collection. (Inherited from ObservableCollection<T>) |
| Clear() |
Removes all elements from the Collection<T>. (Inherited from Collection<T>) |
| Clear(Boolean) |
Removes all items from the collection, and optionally detaches all the items from the DataServiceContext. |
| ClearItems() |
Removes all items from the collection. (Inherited from ObservableCollection<T>) |
| Contains(T) |
Determines whether an element is in the Collection<T>. (Inherited from Collection<T>) |
| CopyTo(T[], Int32) |
Copies the entire Collection<T> to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from Collection<T>) |
| Detach() |
Disables DataServiceContext tracking of all items in the collection. |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetEnumerator() |
Returns an enumerator that iterates through the Collection<T>. (Inherited from Collection<T>) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IndexOf(T) |
Searches for the specified object and returns the zero-based index of the first occurrence within the entire Collection<T>. (Inherited from Collection<T>) |
| Insert(Int32, T) |
Inserts an element into the Collection<T> at the specified index. (Inherited from Collection<T>) |
| InsertItem(Int32, T) |
Adds a specified item to the collection at the specified index. |
| Load(IEnumerable<T>) |
Loads a collection of entity objects into the collection. |
| Load(T) |
Loads a single entity object into the collection. |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| Move(Int32, Int32) |
Moves the item at the specified index to a new location in the collection. (Inherited from ObservableCollection<T>) |
| MoveItem(Int32, Int32) |
Moves the item at the specified index to a new location in the collection. (Inherited from ObservableCollection<T>) |
| OnCollectionChanged(NotifyCollectionChangedEventArgs) |
Raises the CollectionChanged event with the provided arguments. (Inherited from ObservableCollection<T>) |
| OnPropertyChanged(PropertyChangedEventArgs) |
Raises the PropertyChanged event with the provided arguments. (Inherited from ObservableCollection<T>) |
| Remove(T) |
Removes the first occurrence of a specific object from the Collection<T>. (Inherited from Collection<T>) |
| RemoveAt(Int32) |
Removes the element at the specified index of the Collection<T>. (Inherited from Collection<T>) |
| RemoveItem(Int32) |
Removes the item at the specified index of the collection. (Inherited from ObservableCollection<T>) |
| SetItem(Int32, T) |
Replaces the element at the specified index. (Inherited from ObservableCollection<T>) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Events
| CollectionChanged |
Occurs when an item is added, removed, or moved, or the entire list is refreshed. (Inherited from ObservableCollection<T>) |
| PropertyChanged |
Occurs when a property value changes. (Inherited from ObservableCollection<T>) |
Explicit Interface Implementations
| ICollection.CopyTo(Array, Int32) |
Copies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from Collection<T>) |
| ICollection.IsSynchronized |
Gets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from Collection<T>) |
| ICollection.SyncRoot |
Gets an object that can be used to synchronize access to the ICollection. (Inherited from Collection<T>) |
| ICollection<T>.IsReadOnly |
Gets a value indicating whether the ICollection<T> is read-only. (Inherited from Collection<T>) |
| IEnumerable.GetEnumerator() |
Returns an enumerator that iterates through a collection. (Inherited from Collection<T>) |
| IList.Add(Object) |
Adds an item to the IList. (Inherited from Collection<T>) |
| IList.Contains(Object) |
Determines whether the IList contains a specific value. (Inherited from Collection<T>) |
| IList.IndexOf(Object) |
Determines the index of a specific item in the IList. (Inherited from Collection<T>) |
| IList.Insert(Int32, Object) |
Inserts an item into the IList at the specified index. (Inherited from Collection<T>) |
| IList.IsFixedSize |
Gets a value indicating whether the IList has a fixed size. (Inherited from Collection<T>) |
| IList.IsReadOnly |
Gets a value indicating whether the IList is read-only. (Inherited from Collection<T>) |
| IList.Item[Int32] |
Gets or sets the element at the specified index. (Inherited from Collection<T>) |
| IList.Remove(Object) |
Removes the first occurrence of a specific object from the IList. (Inherited from Collection<T>) |
| INotifyPropertyChanged.PropertyChanged |
Occurs when a property value changes. (Inherited from ObservableCollection<T>) |
Extension Methods
| ToFrozenDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a FrozenDictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector function. |
| ToFrozenDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a FrozenDictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions. |
| ToFrozenSet<T>(IEnumerable<T>, IEqualityComparer<T>) |
Creates a FrozenSet<T> with the specified values. |
| ToImmutableArray<TSource>(IEnumerable<TSource>) |
Creates an immutable array from the specified collection. |
| ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Constructs an immutable dictionary from an existing collection of elements, applying a transformation function to the source keys. |
| ToImmutableDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Constructs an immutable dictionary based on some transformation of a sequence. |
| ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents. |
| ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key comparer. |
| ToImmutableDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IEqualityComparer<TKey>, IEqualityComparer<TValue>) |
Enumerates and transforms a sequence, and produces an immutable dictionary of its contents by using the specified key and value comparers. |
| ToImmutableHashSet<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable hash set of its contents. |
| ToImmutableHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Enumerates a sequence, produces an immutable hash set of its contents, and uses the specified equality comparer for the set type. |
| ToImmutableList<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable list of its contents. |
| ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents. |
| ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key comparer. |
| ToImmutableSortedDictionary<TSource,TKey,TValue>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TValue>, IComparer<TKey>, IEqualityComparer<TValue>) |
Enumerates and transforms a sequence, and produces an immutable sorted dictionary of its contents by using the specified key and value comparers. |
| ToImmutableSortedSet<TSource>(IEnumerable<TSource>) |
Enumerates a sequence and produces an immutable sorted set of its contents. |
| ToImmutableSortedSet<TSource>(IEnumerable<TSource>, IComparer<TSource>) |
Enumerates a sequence, produces an immutable sorted set of its contents, and uses the specified comparer. |
| CopyToDataTable<T>(IEnumerable<T>) |
Returns a DataTable that contains copies of the DataRow objects, given an input IEnumerable<T> object where the generic parameter |
| CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption) |
Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter |
| CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption, FillErrorEventHandler) |
Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter |
| Aggregate<TSource>(IEnumerable<TSource>, Func<TSource,TSource,TSource>) |
Applies an accumulator function over a sequence. |
| Aggregate<TSource,TAccumulate>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>) |
Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value. |
| Aggregate<TSource,TAccumulate,TResult>(IEnumerable<TSource>, TAccumulate, Func<TAccumulate,TSource,TAccumulate>, Func<TAccumulate,TResult>) |
Applies an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value. |
| All<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether all elements of a sequence satisfy a condition. |
| Any<TSource>(IEnumerable<TSource>) |
Determines whether a sequence contains any elements. |
| Any<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Determines whether any element of a sequence satisfies a condition. |
| Append<TSource>(IEnumerable<TSource>, TSource) |
Appends a value to the end of the sequence. |
| AsEnumerable<TSource>(IEnumerable<TSource>) |
Returns the input typed as IEnumerable<T>. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Computes the average of a sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Computes the average of a sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Computes the average of a sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Computes the average of a sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Computes the average of a sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Computes the average of a sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Computes the average of a sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. |
| Average<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Computes the average of a sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. |
| Cast<TResult>(IEnumerable) |
Casts the elements of an IEnumerable to the specified type. |
| Concat<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Concatenates two sequences. |
| Contains<TSource>(IEnumerable<TSource>, TSource) |
Determines whether a sequence contains a specified element by using the default equality comparer. |
| Contains<TSource>(IEnumerable<TSource>, TSource, IEqualityComparer<TSource>) |
Determines whether a sequence contains a specified element by using a specified IEqualityComparer<T>. |
| Count<TSource>(IEnumerable<TSource>) |
Returns the number of elements in a sequence. |
| Count<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns a number that represents how many elements in the specified sequence satisfy a condition. |
| DefaultIfEmpty<TSource>(IEnumerable<TSource>) |
Returns the elements of the specified sequence or the type parameter's default value in a singleton collection if the sequence is empty. |
| DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) |
Returns the elements of the specified sequence or the specified value in a singleton collection if the sequence is empty. |
| Distinct<TSource>(IEnumerable<TSource>) |
Returns distinct elements from a sequence by using the default equality comparer to compare values. |
| Distinct<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Returns distinct elements from a sequence by using a specified IEqualityComparer<T> to compare values. |
| ElementAt<TSource>(IEnumerable<TSource>, Int32) |
Returns the element at a specified index in a sequence. |
| ElementAtOrDefault<TSource>(IEnumerable<TSource>, Int32) |
Returns the element at a specified index in a sequence or a default value if the index is out of range. |
| Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set difference of two sequences by using the default equality comparer to compare values. |
| Except<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set difference of two sequences by using the specified IEqualityComparer<T> to compare values. |
| First<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence. |
| First<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the first element in a sequence that satisfies a specified condition. |
| FirstOrDefault<TSource>(IEnumerable<TSource>) |
Returns the first element of a sequence, or a default value if the sequence contains no elements. |
| FirstOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the first element of the sequence that satisfies a condition or a default value if no such element is found. |
| GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Groups the elements of a sequence according to a specified key selector function. |
| GroupBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer. |
| GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function. |
| GroupBy<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function. |
| GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. |
| GroupBy<TSource,TKey,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TKey,IEnumerable<TSource>,TResult>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer. |
| GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>,TResult>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function. |
| GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>, Func<TSource, TKey>, Func<TSource,TElement>, Func<TKey,IEnumerable<TElement>, TResult>, IEqualityComparer<TKey>) |
Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function. |
| GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>, TResult>) |
Correlates the elements of two sequences based on equality of keys and groups the results. The default equality comparer is used to compare keys. |
| GroupJoin<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,IEnumerable<TInner>, TResult>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on key equality and groups the results. A specified IEqualityComparer<T> is used to compare keys. |
| Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set intersection of two sequences by using the default equality comparer to compare values. |
| Intersect<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set intersection of two sequences by using the specified IEqualityComparer<T> to compare values. |
| Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>) |
Correlates the elements of two sequences based on matching keys. The default equality comparer is used to compare keys. |
| Join<TOuter,TInner,TKey,TResult>(IEnumerable<TOuter>, IEnumerable<TInner>, Func<TOuter,TKey>, Func<TInner,TKey>, Func<TOuter,TInner,TResult>, IEqualityComparer<TKey>) |
Correlates the elements of two sequences based on matching keys. A specified IEqualityComparer<T> is used to compare keys. |
| Last<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence. |
| Last<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the last element of a sequence that satisfies a specified condition. |
| LastOrDefault<TSource>(IEnumerable<TSource>) |
Returns the last element of a sequence, or a default value if the sequence contains no elements. |
| LastOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the last element of a sequence that satisfies a condition or a default value if no such element is found. |
| LongCount<TSource>(IEnumerable<TSource>) |
Returns an Int64 that represents the total number of elements in a sequence. |
| LongCount<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns an Int64 that represents how many elements in a sequence satisfy a condition. |
| Max<TSource>(IEnumerable<TSource>) |
Returns the maximum value in a generic sequence. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the maximum Decimal value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the maximum Double value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the maximum Int32 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the maximum Int64 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Decimal value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Double value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int32 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Int64 value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the maximum nullable Single value. |
| Max<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the maximum Single value. |
| Max<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the maximum resulting value. |
| Min<TSource>(IEnumerable<TSource>) |
Returns the minimum value in a generic sequence. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Invokes a transform function on each element of a sequence and returns the minimum Decimal value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Invokes a transform function on each element of a sequence and returns the minimum Double value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Invokes a transform function on each element of a sequence and returns the minimum Int32 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Invokes a transform function on each element of a sequence and returns the minimum Int64 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Decimal value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Double value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int32 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Int64 value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Invokes a transform function on each element of a sequence and returns the minimum nullable Single value. |
| Min<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Invokes a transform function on each element of a sequence and returns the minimum Single value. |
| Min<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Invokes a transform function on each element of a generic sequence and returns the minimum resulting value. |
| OfType<TResult>(IEnumerable) |
Filters the elements of an IEnumerable based on a specified type. |
| OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in ascending order according to a key. |
| OrderBy<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in ascending order by using a specified comparer. |
| OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Sorts the elements of a sequence in descending order according to a key. |
| OrderByDescending<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IComparer<TKey>) |
Sorts the elements of a sequence in descending order by using a specified comparer. |
| Prepend<TSource>(IEnumerable<TSource>, TSource) |
Adds a value to the beginning of the sequence. |
| Reverse<TSource>(IEnumerable<TSource>) |
Inverts the order of the elements in a sequence. |
| Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,TResult>) |
Projects each element of a sequence into a new form. |
| Select<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,TResult>) |
Projects each element of a sequence into a new form by incorporating the element's index. |
| SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TResult>>) |
Projects each element of a sequence to an IEnumerable<T> and flattens the resulting sequences into one sequence. |
| SelectMany<TSource,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TResult>>) |
Projects each element of a sequence to an IEnumerable<T>, and flattens the resulting sequences into one sequence. The index of each source element is used in the projected form of that element. |
| SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) |
Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. |
| SelectMany<TSource,TCollection,TResult>(IEnumerable<TSource>, Func<TSource,Int32,IEnumerable<TCollection>>, Func<TSource,TCollection,TResult>) |
Projects each element of a sequence to an IEnumerable<T>, flattens the resulting sequences into one sequence, and invokes a result selector function on each element therein. The index of each source element is used in the intermediate projected form of that element. |
| SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Determines whether two sequences are equal by comparing the elements by using the default equality comparer for their type. |
| SequenceEqual<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Determines whether two sequences are equal by comparing their elements by using a specified IEqualityComparer<T>. |
| Single<TSource>(IEnumerable<TSource>) |
Returns the only element of a sequence, and throws an exception if there is not exactly one element in the sequence. |
| Single<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the only element of a sequence that satisfies a specified condition, and throws an exception if more than one such element exists. |
| SingleOrDefault<TSource>(IEnumerable<TSource>) |
Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence. |
| SingleOrDefault<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns the only element of a sequence that satisfies a specified condition or a default value if no such element exists; this method throws an exception if more than one element satisfies the condition. |
| Skip<TSource>(IEnumerable<TSource>, Int32) |
Bypasses a specified number of elements in a sequence and then returns the remaining elements. |
| SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. |
| SkipWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements. The element's index is used in the logic of the predicate function. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Decimal>) |
Computes the sum of the sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Double>) |
Computes the sum of the sequence of Double values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int32>) |
Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Int64>) |
Computes the sum of the sequence of Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Decimal>>) |
Computes the sum of the sequence of nullable Decimal values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Double>>) |
Computes the sum of the sequence of nullable Double values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int32>>) |
Computes the sum of the sequence of nullable Int32 values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Int64>>) |
Computes the sum of the sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Nullable<Single>>) |
Computes the sum of the sequence of nullable Single values that are obtained by invoking a transform function on each element of the input sequence. |
| Sum<TSource>(IEnumerable<TSource>, Func<TSource,Single>) |
Computes the sum of the sequence of Single values that are obtained by invoking a transform function on each element of the input sequence. |
| Take<TSource>(IEnumerable<TSource>, Int32) |
Returns a specified number of contiguous elements from the start of a sequence. |
| TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Returns elements from a sequence as long as a specified condition is true. |
| TakeWhile<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Returns elements from a sequence as long as a specified condition is true. The element's index is used in the logic of the predicate function. |
| ToArray<TSource>(IEnumerable<TSource>) |
Creates an array from a IEnumerable<T>. |
| ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function. |
| ToDictionary<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function and key comparer. |
| ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to specified key selector and element selector functions. |
| ToDictionary<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a Dictionary<TKey,TValue> from an IEnumerable<T> according to a specified key selector function, a comparer, and an element selector function. |
| ToHashSet<TSource>(IEnumerable<TSource>) |
Creates a HashSet<T> from an IEnumerable<T>. |
| ToHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) |
Creates a HashSet<T> from an IEnumerable<T> using the |
| ToList<TSource>(IEnumerable<TSource>) |
Creates a List<T> from an IEnumerable<T>. |
| ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function. |
| ToLookup<TSource,TKey>(IEnumerable<TSource>, Func<TSource,TKey>, IEqualityComparer<TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function and key comparer. |
| ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to specified key selector and element selector functions. |
| ToLookup<TSource,TKey,TElement>(IEnumerable<TSource>, Func<TSource,TKey>, Func<TSource,TElement>, IEqualityComparer<TKey>) |
Creates a Lookup<TKey,TElement> from an IEnumerable<T> according to a specified key selector function, a comparer and an element selector function. |
| Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>) |
Produces the set union of two sequences by using the default equality comparer. |
| Union<TSource>(IEnumerable<TSource>, IEnumerable<TSource>, IEqualityComparer<TSource>) |
Produces the set union of two sequences by using a specified IEqualityComparer<T>. |
| Where<TSource>(IEnumerable<TSource>, Func<TSource,Boolean>) |
Filters a sequence of values based on a predicate. |
| Where<TSource>(IEnumerable<TSource>, Func<TSource,Int32,Boolean>) |
Filters a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function. |
| Zip<TFirst,TSecond,TResult>(IEnumerable<TFirst>, IEnumerable<TSecond>, Func<TFirst,TSecond,TResult>) |
Applies a specified function to the corresponding elements of two sequences, producing a sequence of the results. |
| AsParallel(IEnumerable) |
Enables parallelization of a query. |
| AsParallel<TSource>(IEnumerable<TSource>) |
Enables parallelization of a query. |
| AsQueryable(IEnumerable) |
Converts an IEnumerable to an IQueryable. |
| AsQueryable<TElement>(IEnumerable<TElement>) |
Converts a generic IEnumerable<T> to a generic IQueryable<T>. |
| Ancestors<T>(IEnumerable<T>) |
Returns a collection of elements that contains the ancestors of every node in the source collection. |
| Ancestors<T>(IEnumerable<T>, XName) |
Returns a filtered collection of elements that contains the ancestors of every node in the source collection. Only elements that have a matching XName are included in the collection. |
| DescendantNodes<T>(IEnumerable<T>) |
Returns a collection of the descendant nodes of every document and element in the source collection. |
| Descendants<T>(IEnumerable<T>) |
Returns a collection of elements that contains the descendant elements of every element and document in the source collection. |
| Descendants<T>(IEnumerable<T>, XName) |
Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection. |
| Elements<T>(IEnumerable<T>) |
Returns a collection of the child elements of every element and document in the source collection. |
| Elements<T>(IEnumerable<T>, XName) |
Returns a filtered collection of the child elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection. |
| InDocumentOrder<T>(IEnumerable<T>) |
Returns a collection of nodes that contains all nodes in the source collection, sorted in document order. |
| Nodes<T>(IEnumerable<T>) |
Returns a collection of the child nodes of every document and element in the source collection. |
| Remove<T>(IEnumerable<T>) |
Removes every node in the source collection from its parent node. |
