VB.Net - 赋值运算符
2018-12-19 09:32 更新
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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