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VB.Net - 赋值运算符

2022-06-02 13:53 更新

等价于VB.Net支持以下赋值运算符：

运算符	描述	示例
=	简单赋值操作符，将值从右侧操作数分配给左侧操作数	C = A + B将A + B的值赋给C
+=	加法赋值运算符，向左操作数添加右操作数，并将结果赋给左操作数	C += A等价于C = C + A
-=	减法赋值运算符，它从左操作数中减去右操作数，并将结果赋给左操作数	C -= A 等价于 C = C - A
*=	乘法赋值运算符，它将右操作数与左操作数相乘，并将结果赋给左操作数	C = A等价于 C = C A
/=	除法赋值运算符，它用右操作数划分左操作数，并将结果分配给左操作数（浮点除法）	C /= A 等价于C = C / A
\=	整除赋值运算符，它用右操作数划分左操作数，并将结果分配给左操作数（整数除法）	C \= A 等价于 C = C \A
^=	指数赋值运算符。它将右操作数作为为左操作数的指数进行求幂，并将结果分配给左操作数	C^=A等价于 C = C ^ A
<<=	左移赋值运算符	C <<= 2 等价于 C = C << 2
>>=	右移赋值运算符	C >>= 2 等价于 C = C >> 2
&=	字符串连接操作符，可以将右边的字符串连接到做字符串的后面（将左边的字符串和右边的字符串连接后赋值给左字符串）	Str1 &= Str2等价于 Str1 = Str1 & Str2

示例：

尝试以下示例来了解VB.Net中可用的所有赋值运算符：

Module assignment
   Sub Main()
      Dim a As Integer = 21
      Dim pow As Integer = 2
      Dim str1 As String = "Hello! "
      Dim str2 As String = "VB Programmers"
      Dim c As Integer
      c = a
      Console.WriteLine("Line 1 - =  Operator Example, _
	  Value of c = {0}", c)
      c += a
      Console.WriteLine("Line 2 - +=  Operator Example, _
	  Value of c = {0}", c)
      c -= a
      Console.WriteLine("Line 3 - -=  Operator Example, _
	  Value of c = {0}", c)
      c *= a
      Console.WriteLine("Line 4 - *=  Operator Example, _
	  Value of c = {0}", c)
      c /= a
      Console.WriteLine("Line 5 - /=  Operator Example, _
	  Value of c = {0}", c)
      c = 20
      c ^= pow
      Console.WriteLine("Line 6 - ^=  Operator Example, _
	  Value of c = {0}", c)
      c <<= 2
      Console.WriteLine("Line 7 - <<=  Operator Example,_
	  Value of c = {0}", c)
      c >>= 2
      Console.WriteLine("Line 8 - >>=  Operator Example,_
	  Value of c = {0}", c)
      str1 &= str2
      Console.WriteLine("Line 9 - &=  Operator Example,_
	  Value of str1 = {0}", str1)
      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：

Line 1 - =  Operator Example, Value of c = 21
Line 2 - += Operator Example, Value of c = 42
Line 3 - -= Operator Example, Value of c = 21
Line 4 - *= Operator Example, Value of c = 441
Line 5 - /= Operator Example, Value of c = 21
Line 6 - ^= Operator Example, Value of c = 400
Line 7 - <<= Operator Example, Value of c = 1600
Line 8 - >>= Operator Example, Value of c = 400
Line 9 - &= Operator Example, Value of str1 = Hello! VB Programmers

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