本文整理匯總了VB.NET中System.Func<T1,T2,TResult>代理的典型用法代碼示例。如果您正苦於以下問題：VB.NET Func<T1,T2,TResult>代理的具體用法？VB.NET Func<T1,T2,TResult>怎麽用？VB.NET Func<T1,T2,TResult>使用的例子？那麽, 這裏精選的代理代碼示例或許可以為您提供幫助。
在下文中一共展示了Func<T1,T2,TResult>代理的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: Func3Example
' 導入命名空間
Imports System.Collections.Generic
Imports System.Linq
Public Module Func3Example
Public Sub Main()
Dim predicate As Func(Of String, Integer, Boolean) = Function(str, index) str.Length = index
Dim words() As String = { "orange", "apple", "Article", "elephant", "star", "and" }
Dim aWords As IEnumerable(Of String) = words.Where(predicate)
For Each word As String In aWords
Console.WriteLine(word)
Next
End Sub
End Module示例2: DelegateExample
' Declare a delegate to represent string extraction method
Delegate Function ExtractMethod(ByVal stringToManipulate As String, _
ByVal maximum As Integer) As String()
Module DelegateExample
Public Sub Main()
' Instantiate delegate to reference ExtractWords method
Dim extractMeth As ExtractMethod = AddressOf ExtractWords
Dim title As String = "The Scarlet Letter"
' Use delegate instance to call ExtractWords method and display result
For Each word As String In extractMeth(title, 5)
Console.WriteLine(word)
Next
End Sub
Private Function ExtractWords(phrase As String, limit As Integer) As String()
Dim delimiters() As Char = {" "c}
If limit > 0 Then
Return phrase.Split(delimiters, limit)
Else
Return phrase.Split(delimiters)
End If
End Function
End Module示例3: GenericFunc
Module GenericFunc
Public Sub Main()
' Instantiate delegate to reference ExtractWords method
Dim extractMeth As Func(Of String, Integer, String()) = AddressOf ExtractWords
Dim title As String = "The Scarlet Letter"
' Use delegate instance to call ExtractWords method and display result
For Each word As String In extractMeth(title, 5)
Console.WriteLine(word)
Next
End Sub
Private Function ExtractWords(phrase As String, limit As Integer) As String()
Dim delimiters() As Char = {" "c}
If limit > 0 Then
Return phrase.Split(delimiters, limit)
Else
Return phrase.Split(delimiters)
End If
End Function
End Module示例4: LambdaExpression
Module LambdaExpression
Public Sub Main()
Dim separators() As Char = {" "c}
Dim extract As Func(Of String, Integer, String()) = Function(s, i) _
CType(iif(i > 0, s.Split(separators, i), s.Split(separators)), String())
Dim title As String = "The Scarlet Letter"
For Each word As String In extract(title, 5)
Console.WriteLine(word)
Next
End Sub
End Module