VB.Net - 赋值运算符

由 youj 创建, 最后一次修改 2016-12-15

VB.Net支持以下赋值运算符:

运算符描述示例
=Simple assignment operator, Assigns values from right side operands to left side operand
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 will assign value of A + B into C
+=Add AND assignment operator, It adds right operand to the left operand and assigns the result to left operand
添加AND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 is equivalent to C = C + A
-=Subtract AND assignment operator, It subtracts right operand from the left operand and assigns the result to left operand
减法AND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 is equivalent to C = C - A
*=Multiply AND assignment operator, It multiplies right operand with the left operand and assigns the result to left operand
乘法AND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 is equivalent to C = C * A
/=Divide AND assignment operator, It divides left operand with the right operand and assigns the result to left operand (floating point division)
除法AND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 is equivalent to C = C / A
\=Divide AND assignment operator, It divides left operand with the right operand and assigns the result to left operand (Integer division)
除法AND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 is equivalent to C = C \A
^=Exponentiation and assignment operator. It raises the left operand to the power of the right operand and assigns the result to left operand
指数和赋值运算符。 它将左操作数提升为右操作数的幂,并将结果分配给左操作数
C^=A is equivalent to C = C ^ A
<<=Left shift AND assignment operator
左移AND赋值运算符
C <<= 2 is same as C = C << 2
>>=Right shift AND assignment operator
右移AND赋值运算符
C >>= 2 is same as C = C >> 2
&=Concatenates a String expression to a String variable or property and assigns the result to the variable or property.
将String表达式连接到String变量或属性,并将结果分配给变量或属性。

Str1 &= Str2 is same as

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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