Lookup<TKey,TElement>.GetEnumerator 方法

定义

命名空间:

System.Linq

程序集:

System.Linq.dll

Source:

Lookup.SpeedOpt.cs

返回一个循环访问 Lookup<TKey,TElement> 的泛型枚举数。

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))

返回

IEnumerator<IGrouping<TKey,TElement>>

用于 Lookup<TKey,TElement> 的枚举数。

实现

GetEnumerator()

示例

以下示例演示如何使用 GetEnumerator 来循环访问 的 Lookup<TKey,TElement>键和值。 此代码示例是为 Lookup<TKey,TElement> 类提供的一个更大示例的一部分。

// 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())