The Property Get statement is an essential feature in VBA that allows developers to create custom read-only properties for their classes. This statement is often used in conjunction with the ‘Property Let’ or ‘Property Set’ statements, which allow for write-only or read/write properties, respectively.
In this blog post, we will explore the purpose and syntax of the Property Get statement, as well as provide the examples of its usage. We will also discuss some important notes and remarks to keep in mind when using this statement.
VBA Property Get Statement
Purpose of Property Get Statement
The Property Get statement serves the purpose of creating a custom read-only property for a class. It allows external code to retrieve the value of a private variable within the class without directly accessing it. This promotes encapsulation and protects the integrity of the value as it can only be modified by the class itself.
Syntax of Property Get Statement
The basic syntax for a Property Get statement is as follows:
Property Get PropertyName As DataType
The ‘PropertyName’ is the name of the property to be created, and the ‘DataType’ represents the data type of the property. Inside the code block, the value of the property is set using the ‘PropertyName’ followed by the keyword ‘Get’. For example, if the property name is “Name,” the code inside the Property Get statement would be “Name Get.”
Examples of VBA Property Get Statement
1. Creating a custom property for storing a person’s name in a class:
Private pName As String
Property Get Name() As String
Name = pName
2. Defining a property to return the number of characters in a string:
Private pText As String
Property Get CharCount As Integer
CharCount = Len(pText)
3. Using the Property Get statement to create a read-only property for returning the current date:
Property Get CurrentDate As Date
CurrentDate = Date
4. Defining a property to return the sum of two private variables in a class:
Private pNum1 As Integer
Private pNum2 As Integer
Property Get Sum As Integer
Sum = pNum1 + pNum2
5. Creating a property to return a range of values using a user-defined function:
Private pNumbers As Variant
Property Get EvenNumbers() As Variant
Dim result As Variant
Dim i As Integer
For i = 1 To UBound(pNumbers)
If pNumbers(i) Mod 2 = 0 Then
result(i) = pNumbers(i)
EvenNumbers = result
Important Notes and Remarks
Here are some important points to keep in mind when using the Property Get statement:
- It is good practice to use the keyword ‘Get’ before the property name when inside the code block.
- Using Property Get without a matching ‘Property Let’ or ‘Property Set’ statement will create a read-only property.
- The data type of the property in Property Get statement must match the data type of the variable being assigned in the code block.
- If there is a need to modify the property value, the ‘Property Let’ or ‘Property Set’ statement must be used instead.
- VBA does not allow for overloading of properties, so multiple ‘Get’ statements for the same property name cannot exist.
In conclusion, the Property Get statement plays a crucial role in creating read-only custom properties for classes in VBA. It helps promote encapsulation and ensures the integrity of the data being accessed. In this post, we discussed the purpose and syntax of the Property Get statement, provided the examples of its usage, and discussed some important notes and remarks to keep in mind. I hope this post was informative and helpful for your understanding of the Property Get statement in VBA.
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