In this tutorial, I will teach you how to connect MySQL database in c# windows application using Microsoft Visual Studio 2008. With this, you can establish a connection between MySQL Database and C#.net.
About Project Details
| ABOUT PROJECT | PROJECT DETAILS |
|---|---|
| Project Name : | How to Connect MySQL to Database in C# |
| Project Platform : | C# |
| Programming Language Used: | C# Programming Language |
| Developer Name : | itsourcecode.com |
| IDE Tool (Recommended): | Visual Studio 2019 |
| Project Type : | Desktop Application |
| Database: | MYSQL DATABASE |
Can you connect C# to MySQL?
A MySqlConnection Object serves as the intermediary for all of the communication that takes place between a MySQL server and a C# application.
In order for your application to be able to communicate with the server, it first needs to create an instance of the MySqlConnection object, configure it, and then open it.
What is SQL connection in C#?
A SqlConnection object represents a unique session to a SQL Server data source. When using a client-server database architecture, this function is analogous to establishing a network connection to the server.
When connecting to a Microsoft SQL Server database, the efficiency of the connection can be improved by utilizing SqlConnection in conjunction with SqlDataAdapter and SqlCommand.
Can you use SQL in C#?
C# has the ability to execute a select command written in SQL against a database. The ‘SQL’ statement can be utilized in order to retrieve data from a certain table within the database.
The process of inserting data into the database can also be accomplished with C#, which can be used to add records to the database.
Let’s begin:
1. Create a database in the MySQL and name it “dbconnect“
2. Open Microsoft Visual Studio and create a new windows form application for C#. Then, drag a button and do the form just like this.

3. Double-click a button to fire the click event handler of it.
4. After that, do the following codes to established a connection between MySQL Database and C#.net in the method.
Note: Add “MySQL.Data.dll” as your refernce and put “using MySql.Data.MySqlClient;“ above the namespace to access MySQL library.
//initialize sql connection
MySqlConnection con = new MySqlConnection();
//set a connection string
con.ConnectionString = "server=localhost;user id=root;password=;Database=dbconnect;";
//opening connection
con.Open();
//validating connection
if (con.State == ConnectionState.Open)
{
if (button1.Text == "Connect Me")
{
button1.Text = "Disconnect Me";
this.Text = "Connected";
}
else
{
button1.Text = "Connect Me";
this.Text = "Disconnected";
con.Close();
}
}5. Press F5 on the keyboard to run your project.
Output:

This is a simple yet powerful method to do because without this, you can’t proceed to the process of CRUD.
Frequently Asked Questions
What does this C# code snippet demonstrate?
Focused C# WinForms code pattern: how to add, insert, save, search, display, print, or connect to SQL Server with minimum code. Drop-in pattern you can adapt for your own capstone module.
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.
