Autonumber in a TextBox in C#
In this tutorial, I’m going to show you how to create an autonumber in the TextBox in C#.net. This process has the ability to auto generate the number in the TextBox when the button is clicked. It is very useful for the future use, most specially when developing a system.
Let’s get started:
1. Open Microsoft Visual Studio 2008 and create new Windows Form Application for C#. Then, drag a TextBox and Button in the do the Form.
2. After setting up the Form, double click the “click” button to fire the click event handler. Then, put the following code into it.
private void button1_Click(object sender, EventArgs e)
{
//declare a variable for storing the incremented value into it
int autonum=1;
//set the formula for the incrementing of a textbox
autonum = autonum + int.Parse(textBox1.Text);
//put the value in the textbox.
textBox1.Text = autonum.ToString();
}Description: The number in the TextBox will be incremented by 1 when the button is clicked.
Output in Autonumber in a TextBox:
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| ABOUT PROJECT | PROJECT DETAILS |
|---|---|
| Project Name : | Auto number in a Text Box |
| Project Platform : | C# |
| Programming Language Used: | C# Programming Language |
| Developer Name : | itsourcecode.com |
| IDE Tool (Recommended): | Visual Studio 2019 |
| Project Type : | Desktop Application |
| Database: | None |
| Upload Date and Time: | June 22, 2016 – 9:07 am |
Frequently Asked Questions
What does this C# WinForms control example demonstrate?
Core Windows Forms control (TextBox, CheckBox, RadioButton, ListBox, TreeView, ProgressBar, Button, DateTimePicker, etc.) usage pattern: properties, events, data binding, common gotchas. Foundation skill for building any C# desktop application capstone.
What .NET and SQL Server versions does this project require?
Most projects in this batch use C# WinForms on .NET Framework 4.5+ (the dominant stack for tutorial sites) with SQL Server 2012 Express or higher. A few newer projects use .NET 6/7/8. To run: install Visual Studio 2019 / 2022 (Community edition is free), install SQL Server Express + SSMS, open the .sln file, build, run.
How do I set up the database for this C# project?
Open SQL Server Management Studio (SSMS) and connect to your SQL Server instance (e.g. localhost\SQLEXPRESS). Right-click Databases > Restore Database OR > New Database then import the included .sql script. Update the connection string in App.config (or in code-behind) with your server name + credentials. Rebuild and run.
Can I use this C# project for a BSIT capstone or thesis?
Yes, but extend it. A bare CRUD form is too narrow for full capstone scope. Add: role-based access (admin/staff/customer login redirect), Crystal Reports or RDLC reports, dashboard with Chart controls, audit log, multi-branch support. Pair with Chapter 1-5 documentation matching your panel’s rubric.
Why am I getting ‘connection error’ or ‘object reference not set’?
Three common C# issues: (1) Connection error: SQL Server isn’t running OR connection string in App.config has wrong server name. Open SQL Server Configuration Manager + verify SQL Server (SQLEXPRESS) service is running. (2) NullReferenceException: a control reference or DB column returned NULL, add a check or use ?? operator. (3) Build error ‘The type or namespace could not be found’: missing assembly reference, add via Project > Add Reference.
Where can I find more C# projects with source code?
Browse the C# Projects hub for the full library. For other .NET stacks see VB.NET Projects (300+ Windows Forms systems). For ASP.NET WebForms see ASP.NET Projects. For BSIT capstone idea lists see 150 Best Capstone Project Ideas.