VB.Net - 赋值运算符

VB.Net 支持以下赋值运算符：

运算符	描述	示例
=	简单赋值运算符，将右侧操作数的值赋给左侧操作数	C = A + B 将 A + B 的值赋给 C
+=	加法赋值运算符，将右侧操作数加到左侧操作数上，并将结果赋给左侧操作数	C += A 等价于 C = C + A
-=	减法赋值运算符，将右侧操作数从左侧操作数中减去，并将结果赋给左侧操作数	C -= A 等价于 C = C - A
*=	乘法赋值运算符，将右侧操作数乘以左侧操作数，并将结果赋给左侧操作数	C = A 等价于 C = C A
/=	除法赋值运算符，将左侧操作数除以右侧操作数，并将结果赋给左侧操作数（浮点数除法）	C /= A 等价于 C = C / A
\=	除法赋值运算符，将左侧操作数除以右侧操作数，并将结果赋给左侧操作数（整数除法）	C \= A 等价于 C = C \ A
^=	幂运算赋值运算符，将左侧操作数提升到右侧操作数的幂，并将结果赋给左侧操作数	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
&=	将字符串表达式连接到字符串变量或属性，并将结果赋给该变量或属性。	Str1 &= Str2 等价于 Str1 = Str1 & Str2

示例

尝试以下示例以了解 VB.Net 中所有可用的赋值运算符：

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

当以上代码编译并执行时，会产生以下结果：

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

vb.net_operators.htm

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