Lookup<TKey,TElement>.GetEnumerator Method

Reference

Definition

Namespace:: System.Linq

Assemblies:: System.Core.dll, System.Linq.dll

Assemblies:: netstandard.dll, System.Linq.dll

Assembly:: System.Linq.dll

Assembly:: System.Core.dll

Assembly:: netstandard.dll

Source:: Lookup.SpeedOpt.cs

Source:: Lookup.SpeedOpt.cs

Source:: Lookup.SpeedOpt.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Returns a generic enumerator that iterates through the Lookup<TKey,TElement>.

public:
 virtual System::Collections::Generic::IEnumerator<System::Linq::IGrouping<TKey, TElement> ^> ^ GetEnumerator();

public System.Collections.Generic.IEnumerator<System.Linq.IGrouping<TKey,TElement>> GetEnumerator();

abstract member GetEnumerator : unit -> System.Collections.Generic.IEnumerator<System.Linq.IGrouping<'Key, 'Element>>
override this.GetEnumerator : unit -> System.Collections.Generic.IEnumerator<System.Linq.IGrouping<'Key, 'Element>>

Public Function GetEnumerator () As IEnumerator(Of IGrouping(Of TKey, TElement))

Public Iterator Overridable NotOverridable Function GetEnumerator () As IEnumerator(Of IGrouping(Of TKey, TElement))

Returns

IEnumerator<IGrouping<TKey,TElement>>

An enumerator for the Lookup<TKey,TElement>.

Implements

GetEnumerator()

Examples

The following example demonstrates how to use GetEnumerator to iterate through the keys and values of a Lookup<TKey,TElement>. This code example is part of a larger example provided for the Lookup<TKey,TElement> class.

// Iterate through each IGrouping in the Lookup and output the contents.
foreach (IGrouping<char, string> packageGroup in lookup)
{
    // Print the key value of the IGrouping.
    Console.WriteLine(packageGroup.Key);
    // Iterate through each value in the IGrouping and print its value.
    foreach (string str in packageGroup)
        Console.WriteLine("    {0}", str);
}

Dim output As New System.Text.StringBuilder
' Iterate through each IGrouping in the Lookup and output the contents.
For Each packageGroup As IGrouping(Of Char, String) In lookup
    ' Print the key value of the IGrouping.
    output.AppendLine(packageGroup.Key)
    ' Iterate through each value in the IGrouping and print its value.
    For Each str As String In packageGroup
        output.AppendLine(String.Format("    {0}", str))
    Next
Next

' Display the output.
MsgBox(output.ToString())

Applies to

Продукт	Версии
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1
UWP	10.0

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