BC30577：“AddressOf”操作数必须是方法名（不带括号）

AddressOf 运算符创建引用特定过程的过程委托实例。 语法如下：

AddressOf procedurename

你在 AddressOf 之后的参数两侧插入了括号，但其中不需要任何内容。

错误 ID：BC30577

示例

下面的示例生成 bc30577：

Public Sub CountZeroToTen()
    For i = 0 To 10
        Console.WriteLine($"Counted: {i}")
        Threading.Thread.Sleep(500)
    Next
End Sub

Sub Main()
    ' Any of the following two lines generates bc30577.
    'Dim t As New Threading.Thread(AddressOf(CountZeroToTen))
    'Dim t As New Threading.Thread(AddressOf CountZeroToTen())
    t.Start()
End Sub

更正此错误

1. 删除 AddressOf 后面参数两侧的括号，如下例所示：

   Public Sub CountZeroToTen()
       For i = 0 To 10
           Console.WriteLine($"Counted: {i}")
           Threading.Thread.Sleep(500)
       Next
   End Sub
   
   Sub Main()
       Dim t As New Threading.Thread(AddressOf CountZeroToTen)
       t.Start()
   End Sub
   

2. 确保参数是方法名称。

另请参阅

• AddressOf 运算符
• 委托