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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