vb.net overload assignment operator

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= Operator (Visual Basic)

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Assigns a value to a variable or property.

variableorproperty Any writable variable or any property.

value Any literal, constant, or expression.

The element on the left side of the equal sign ( = ) can be a simple scalar variable, a property, or an element of an array. The variable or property cannot be ReadOnly . The = operator assigns the value on its right to the variable or property on its left.

The = operator is also used as a comparison operator. For details, see Comparison Operators .

Overloading

The = operator can be overloaded only as a relational comparison operator, not as an assignment operator. For more information, see Operator Procedures .

The following example demonstrates the assignment operator. The value on the right is assigned to the variable on the left.

• &= Operator
• *= Operator
• += Operator
• -= Operator (Visual Basic)
• /= Operator (Visual Basic)
• \= Operator
• ^= Operator
• Comparison Operators
• Local Type Inference

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• VISUAL BASIC 10

Operator Overloading in VB.NET

In this article we will see the operator overloading in Visual Basic.net.

  When an operator can perform more than one operations, specially with objects, known as operator overloading.A function name can be replaced with the operator using operator keyword.

Important points related to Operator Overloading or guidelines:

• Don't change an operator's semantic meaning. The result of an operator should be intuitive.
• Make certain overloaded operators are shared methods.
• You cannot overload assignment e.g., the "=" operator .

 VB.NET allows the following operators to be overloaded:

• + (increment/plus - unary and binary)>
• - (decrement/minus - unary and binary)
• Not (unary)
• * (multiply - binary)
• / (divide - binary)
• \ (integer divide - binary)
• & (concatenate - binary)
• Like (binary)
• Mod (binary)
• And (binary)
• Or (binary)
• ^ (raise to power - binary)
• << (left shift - binary)
• >> (right shift - binary)
• = (equals - binary)
• <> (not equals - binary)
• < (less than - binary)
• > (greater than - binary)
• <= (less than or equal to - binary)
• >= (greater than or equal to - binary)

 This example  shows the (+) Operator Overloading in VB.NET:

Module module1

    Class Size

        Private feet As Integer , inch As Integer

        Public Sub New ( ByVal f As Integer , ByVal i As Integer )

            feet = f

            inch = i

        End Sub

        Public Sub ShowSize()

            Console .WriteLine( "Size is {0} feet and {1} inch" , feet, inch)

        Public Shared Function Add( ByVal x As Size , ByVal y As Size ) As Size       'add method

            Dim f As Integer = x.feet + y.feet

            Dim i As Integer = x.inch + y.inch

            If i >= 12 Then

                i = i - 12

                f += 1

            End If

            Return New Size (f, i)

        End Function

        Public Shared Operator +( ByVal x As Size , ByVal y As Size ) As Size             ' add method replace with operator(+) using operator keyword  

        End Operator

        Public Shared Sub Main()

            Dim s1 As New Size (5, 9)

            Dim s2 As New Size (8, 8)

            Dim s3 As Size = Size .Add(s1, s2)                    ' add method perform the task  

          'Dim s3 As Size = s1 +s2                            ' + operator perform the task  

    End Class

OUTPUT :  

In the above example (+) operator perform more than one operation. the function name add replace with the operator using Operator keyword .

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