本文整理匯總了VB.NET中System.Linq.Enumerable.Single方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Enumerable.Single方法的具體用法？VB.NET Enumerable.Single怎麽用？VB.NET Enumerable.Single使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了Enumerable.Single方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: fruits
' Create an array of strings.
Dim fruits() As String =
{"apple", "banana", "mango", "orange", "passionfruit", "grape"}
' Get the single item in the array whose length is greater than 10.
Dim result As String =
fruits.Single(Function(fruit) fruit.Length > 10)
' Display the result.
Console.WriteLine($"First query: {result}")示例2:
result = String.Empty
' Try to get the single item in the array whose length is > 15.
Try
result = fruits.Single(Function(fruit) _
fruit.Length > 15)
Catch ex As System.InvalidOperationException
result = "There is not EXACTLY ONE element whose length is > 15."
End Try
' Display the result.
Console.WriteLine($"Second query: {result}")輸出：
First query: passionfruit Second query: There is not EXACTLY ONE element whose length is > 15.
示例3: fruits1
' Create an array that contains one item.
Dim fruits1() As String = {"orange"}
' Get the single item in the array.
Dim result As String = fruits1.Single()
' Display the result.
Console.WriteLine($"First query: {result}")示例4: fruits2
' Create an array that contains two items.
Dim fruits2() As String = {"orange", "apple"}
result = String.Empty
' Try to get the 'single' item in the array.
Try
result = fruits2.Single()
Catch ex As System.InvalidOperationException
result = "The collection does not contain exactly one element."
End Try
' Display the result.
Console.WriteLine($"Second query: {result}")輸出：
First query: orange Second query: The collection does not contain exactly one element.