VB.Net 其他操作符
VB.Net 运算符有很少其他重要的操作系统支持VB.Net。
| 运算符 | 描述 | 示例 |
|---|---|---|
| AddressOf | Returns the address of a procedure. 返回过程的地址。 |
AddHandler Button1.Click, AddressOf Button1_Click |
| Await | It is applied to an operand in an asynchronous method or lambda expression to suspend execution of the method until the awaited task completes. 它应用于异步方法或lambda表达式中的操作数，以挂起该方法的执行，直到等待的任务完成。 |
Dim result As res = Await AsyncMethodThatReturnsResult() Await AsyncMethod() |
| GetType | It returns a Type object for the specified type. The Type object provides information about the type such as its properties, methods, and events. 它返回指定类型的Type对象。 Type对象提供有关类型的信息，例如其属性，方法和事件。 |
MsgBox(GetType(Integer).ToString()) |
| Function Expression | It declares the parameters and code that define a function lambda expression. 它声明定义函数lambda表达式的参数和代码。 |
Dim add5 = Function(num As Integer) num + 5 'prints 10 Console.WriteLine(add5(5)) |
| If | It uses short-circuit evaluation to conditionally return one of two values. The If operator can be called with three arguments or with two arguments. 它使用短路评估有条件地返回两个值之一。 可以使用三个参数或两个参数调用If运算符。 |
Dim num = 5 Console.WriteLine(If(num >= 0, "Positive", "Negative")) |
示例：
以下示例演示了其中一些运算符：
Module assignment
Sub Main()
Dim a As Integer = 21
Console.WriteLine(GetType(Integer).ToString())
Console.WriteLine(GetType(Double).ToString())
Console.WriteLine(GetType(String).ToString())
Dim multiplywith5 = Function(num As Integer) num * 5
Console.WriteLine(multiplywith5(5))
Console.WriteLine(If(a >= 0, "Positive", "Negative"))
Console.ReadLine()
End Sub
End Module
当上述代码被编译和执行时，它产生以下结果：
System.Int32
System.Double
System.String
25
Positive
