Скачать или смотреть How to Change the Formatting of Numbers in an Array with VBA

Discover how to customize number formatting in VBA by converting numbers to string representations using arrays. This guide covers everything from rounding numbers to implementing formatted outputs.
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This video is based on the question https://stackoverflow.com/q/63428838/ asked by the user 'Robi Pham' ( https://stackoverflow.com/u/14109947/ ) and on the answer https://stackoverflow.com/a/63429145/ provided by the user 'Mathieu Guindon' ( https://stackoverflow.com/u/1188513/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

When working on Excel projects with VBA (Visual Basic for Applications), you may find the need to manipulate numerical data in arrays. One common issue that beginners encounter is how to format these numbers for better readability, especially when they want to present large values in a more user-friendly format, such as currency or in millions.

In this guide, we will delve into a practical situation where a VBA user wants to format numbers stored in an array. The user is unsure how to set custom formats for these numbers because standard formatting methods typically do not apply directly to arrays in VBA. We’ll explore a comprehensive solution to this problem to help you enhance your VBA programming skills.

Understanding the Basics

The Challenge

You've created an array that stores rounded numbers from a table. However, if you want these numbers displayed in a specific format (like $0.3MM instead of 300000), you need to address two concepts:

Values: The actual numbers stored in the array.

Representations: How these numbers are displayed to the user.

It's essential to clarify that values and their representation are distinct, and understanding this difference will guide us to implement the correct solution for formatting.

Solution: Formatting Numbers in an Array

Step 1: Redefine Your Array

To format numbers into strings, you’ll need to create an array that holds string values. Instead of using a Long type for your numbers, create a String array for their formatted versions.

Step 2: Implementing the Formatting

Here's a breakdown of how you can format your numbers effectively using VBA.

Define Your Arrays:

Use a Long array to store the original numeric values.

Use a String array to store the formatted output.

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Store Numeric Values:

Loop through your data source and fill in the originalNumbers array.

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Format Numeric Values:

Implement formatting within the same loop, converting numeric values to the desired string representation.

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Step 3: Displaying the Values

Now that you have your numbers formatted as strings, you can assess how to display them appropriately. Depending on where you want to show these formatted values (e.g., in a message box, a user interface, or directly onto an Excel sheet), the method will differ slightly:

Displaying in a TextBox: Assign the string formatted value directly to a TextBox control.

Displaying in an Excel Cell: Input the original numeric value (if you need it) into the cell and then set the NumberFormat property of that cell.

Example for Outputting to Excel

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Conclusion

Customizing the format of numbers in an array with VBA can seem daunting at first, but by distinguishing between the actual numeric values and their string representations, you can use simple techniques to achieve your desired output. Remember to store values in appropriate data types, use formatting functions effectively, and choose the right method to display those formatted strings.

By following the steps outlined in this guide, you'll enhance your coding skills and improve the way data is presented in your Excel applications. Happy coding!