How to Count or Calculate Days in Visual Basic.Net

This tutorial is all about How to Count or Calculate Days in Visual Basic.Net. With this tutorial you can Count or Calculate Days in Visual Basic.Net easily.

In this article, I’ll show you how to compute the difference in age between two ages. I’ve used two LabelBoxes, two TextBoxes, and one Button in this.

LabelBox is used to display things, and it may be displayed by selecting properties from the properties panel. On a Form, a TextBox is used to accept user input.

When we click on a button, it displays the output. I’ve also utilized validation in this, which is used to set a limit on any TextBox. If we enter a number that is longer than two digits, it will return an invalid value.

The steps to take are listed below.

So let’s get started:

• First is open the Visual Basic, Select File on the menu, then click New and create a new project.

• Then a New Project Dialog will appear. You can rename your project, depending on what you like to name it. After that click OK

• Design your form like this just like what I’ve shown you below.

  Add 2 DatetimePicker, 3 Label, Textbox and a Button.

  

• After Designing your form, Add this code to the button.

[vbnet]

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim First As Date
Dim Second As Date
Dim Result As New TimeSpan()
First = DateTimePicker1.Value
Second = DateTimePicker2.Value
Result = Second - First
Me.TextBox1.Text = FormatNumber(Result.TotalDays.ToString, 2)
End Sub

[/vbnet]

• Finally, Click F5 to run Program.

Output:

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Download Source Code! Here

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Technology stack and requirements

To run this VB.NET project, you need the following on your development machine:

• Visual Studio 2019 or later. The free Community Edition is enough for building, debugging, and running the project.
• .NET Framework 4.7.2 or higher. Most Windows 10 and 11 systems have it preinstalled through Windows Update.
• MySQL Server 8.0 or MSSQL Express 2019. Choose whichever your capstone panel prefers; both work with VB.NET data adapters.
• MySQL Connector/NET or SqlClient library. Add via NuGet Package Manager inside Visual Studio.
• Crystal Reports (optional). Required only if the project generates printable reports; install the runtime redistributable.

Installing the source code

The download link contains a ZIP archive with the full solution. Extract and set up in five steps:

1. Extract the archive to a folder outside Program Files (avoids permission issues).
2. Open the .sln file in Visual Studio. It loads the full solution with all forms and modules.
3. Restore NuGet packages. Right-click the solution then Restore NuGet Packages if prompted.
4. Import the database. Locate the .sql file in the archive and import via phpMyAdmin (MySQL) or SQL Server Management Studio.
5. Update the connection string in App.config or module code to match your local database name, user, and password.

How to use this project for your BSIT capstone

This VB.NET project maps cleanly to standard BSIT capstone documentation. Suggested chapter alignment:

• Chapter 1 (Introduction). Discuss the problem the system solves in real-world context. Cite Philippine business or academic use cases where a manual process could be replaced.
• Chapter 2 (Review of Related Literature). Compare this system’s features against 5-10 similar published projects. Cite journals like IJERT or IEEE Access for academic-standard sources.
• Chapter 3 (Methodology). Include Use Case Diagram, Data Flow Diagram, Entity Relationship Diagram, and Activity Diagram covering all major workflows in the system.
• Chapter 4 (Results and Discussion). Screenshot each module of the running system with a caption explaining what data it processes and which user role interacts with it.
• Chapter 5 (Conclusion and Recommendations). Identify features that could be added in a Version 2, such as web dashboard, mobile app, or REST API export.

Modules typical of How to Count or Calculate Days in Visual Basic.Net

• Master data. CRUD forms for the primary entities the system manages, with search and filter.
• Transaction processing. Data entry forms for the day-to-day operations the system automates.
• Reports. Formatted printable output summarizing activity per day, per user, or per category.
• User management. Login with role-based permissions (Admin, Encoder, Viewer).
• Backup and restore. Export database to a .sql or .bak file and restore when needed.

Common enhancements for capstone review

• Modernize the UI. Add Bunifu or Guna UI controls for a more polished, modern appearance.
• Add printable receipts. Integrate a printer preview form with page-setup options.
• Multi-user concurrency. Ensure the database handles simultaneous writes without lost-update errors.
• Web version. Rewrite the front-end in ASP.NET Core or React for a modern deployment path.