How to develop a simple student management system using MySQL and C#

How to use MySQL and C# to develop a simple student management system

Introduction:
The student management system is an important tool for schools to manage student information. It can help The school efficiently manages all student data, including personal information, grades, course schedules, etc. This article will introduce how to use MySQL database and C# programming language to develop a simple student management system, and provide detailed code examples.

1. Set up the development environment
Before we start, we need to set up the development environment. First, make sure you have installed Visual Studio development tools and MySQL database. Next, create a new C# console application project.

2. Create database and data table

1. Open the MySQL database client and create a new database. You can use the following command:
   CREATE DATABASE student_management;
2. Switch to the newly created database:
   USE student_management;
3. Create a table named "students" for storage student information. The table structure is as follows:
   CREATE TABLE students (
   id INT PRIMARY KEY AUTO_INCREMENT,
   name VARCHAR(50) NOT NULL,
   age INT NOT NULL,
   gender VARCHAR(10),
   department VARCHAR(50)
   );

3. Connect to the MySQL database

1. In the C# code, introduce the MySQL.Data namespace to use MySQL Related classes and methods:
   using MySql.Data.MySqlClient;
2. Create a MySQL connection object and set the connection string:
   string connectionString = "Server=localhost;Database=student_management;Uid =root;Pwd=your_password;";
   MySqlConnection connection = new MySqlConnection(connectionString);
3. Open database connection:
   connection.Open();

four , realize the function of adding, deleting, modifying and checking student information

1. Query student information:
   string query = "SELECT * FROM students";
   MySqlCommand command = new MySqlCommand(query, connection );
   MySqlDataReader reader = command.ExecuteReader();
   while (reader.Read())
   {
   // Get student information and print
   Console.WriteLine("ID: { 0}, Name: {1}, Age: {2}, Gender: {3}, Department: {4}",

    reader["id"], reader["name"], reader["age"], reader["gender"], reader["department"]);

   }

2. Insert student information:
   string query = "INSERT INTO students (name, age, gender, department) VALUES (@name, @age, @gender, @department)";
   MySqlCommand command = new MySqlCommand(query, connection);
   command.Parameters.AddWithValue("@name", "张三");
   command.Parameters.AddWithValue("@age", 20);
   command.Parameters.AddWithValue("@gender", " Male");
   command.Parameters.AddWithValue("@department", "Computer Science");
   command.ExecuteNonQuery();
3. Update student information:
   string query = " UPDATE students SET name=@name, age=@age, gender=@gender, department=@department WHERE id=@id";
   MySqlCommand command = new MySqlCommand(query, connection);
   command.Parameters. AddWithValue("@name", "李思");
   command.Parameters.AddWithValue("@age", 22);
   command.Parameters.AddWithValue("@gender", "male");
   command.Parameters.AddWithValue("@department", "Software Engineering");
   command.Parameters.AddWithValue("@id", 1);
   command.ExecuteNonQuery();
4. Delete student information:
   string query = "DELETE FROM students WHERE id=@id";
   MySqlCommand command = new MySqlCommand(query, connection);
   command.Parameters.AddWithValue("@id", 1);
   command.ExecuteNonQuery();

5. Close the database connection
connection.Close();

6. Summary
This article introduces How to develop a simple student management system using MySQL and C#. Through this example, we learned how to create a database and data table, and how to use C# code to implement the addition, deletion, modification, and query functions of student information. I hope this article can help readers initially understand the basic process of developing a student management system using MySQL and C#, and be able to draw inferences from one example to implement more complex functions.

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