Lookup<TKey,TElement>.GetEnumerator 方法
定义
重要
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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))Public Iterator Overridable NotOverridable 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
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())
