winforms-sql-connection [BONTIA]

ConnectionSql.cs

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+namespace TestWins.Model;
+
+//dotnet add package MySql.Data
+using MySql.Data.MySqlClient;
+
+public class ConnectionSql
+{
+    private readonly string _connectionString = "server=localhost;port=3306;database=student;uid=root;pwd=";
+        private MySqlConnection _conn;
+
+    public MySqlConnection connectSql()
+    {
+
+        Console.WriteLine("Connecting to DB");
+
+        _conn = new MySqlConnection(_connectionString);
+
+        Console.WriteLine(_conn == null ? "Datbase Connection Failed" : "Database connection successful");
+
+        return _conn;
+    }
+}

Form1.cs

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+using System.Drawing.Text;
+using TestWins.Controller;
+
+namespace TestWins;
+
+public partial class Form1 : Form
+{
+    //business
+
+    private readonly StudentController controller = new StudentController();
+public Form1()
+{
+    InitializeComponent();
+
+
+    dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+    dataGridView1.AutoGenerateColumns = true; 
+    dataGridView1.MultiSelect = false; 
+
+    loadData();
+}
+
+private void loadData()
+{
+    try
+    {
+        dataGridView1.DataSource = controller.getAll();
+    }
+    catch (Exception ex)
+    {
+        MessageBox.Show("Error loading data: " + ex.Message);
+    }
+}
+
+ private void btnAdd_Click(object sender, EventArgs e)
+{
+    try
+    {
+        var student = new TestWins.Model.Student
+        {
+            studentId = txtStudentId.Text,
+            Name = txtName.Text,
+            age = int.Parse(txtAge.Text),
+            course = txtCourse.Text
+        };
+        controller.createStudent(student);
+        loadData();
+        clearFields();
+    }
+    catch (Exception ex)
+    {
+        MessageBox.Show("Error adding student: " + ex.Message);
+    }
+}
+
+private void btnUpdate_Click(object sender, EventArgs e)
+{
+    try
+    {
+        var student = new TestWins.Model.Student
+        {
+            studentId = txtStudentId.Text,
+            Name = txtName.Text,
+            age = int.Parse(txtAge.Text),
+            course = txtCourse.Text
+        };
+        controller.update(student);
+        loadData();
+        clearFields();
+    }
+    catch (Exception ex)
+    {
+        MessageBox.Show("Error updating student: " + ex.Message);
+    }
+}
+
+private void btnDelete_Click(object sender, EventArgs e)
+{
+    try
+    {
+        controller.delete(txtStudentId.Text);
+        loadData();
+        clearFields();
+    }
+    catch (Exception ex)
+    {
+        MessageBox.Show("Error deleting student: " + ex.Message);
+    }
+}
+
+private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
+{
+    if (dataGridView1.CurrentRow != null)
+    {
+        DataGridViewRow row = dataGridView1.CurrentRow;
+        txtStudentId.Text = row.Cells[0].Value.ToString();
+        txtName.Text = row.Cells[1].Value.ToString();
+        txtAge.Text = row.Cells[2].Value.ToString();
+        txtCourse.Text = row.Cells[3].Value.ToString();
+    }
+}
+
+
+private void clearFields()
+{
+    txtStudentId.Text = "";
+    txtName.Text = "";
+    txtAge.Text = "";
+    txtCourse.Text = "";
+}
+}

Program.cs

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+namespace TestWins;
+
+static class Program
+{
+    /// <summary>
+    ///  The main entry point for the application.
+    /// </summary>
+    [STAThread]
+    static void Main()
+    {
+        // To customize application configuration such as set high DPI settings or default font,
+        // see https://aka.ms/applicationconfiguration.
+        ApplicationConfiguration.Initialize();
+        Application.Run(new Form1());
+    }    
+}

TestWins.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net10.0-windows</TargetFramework>
+    <Nullable>enable</Nullable>
+    <UseWindowsForms>true</UseWindowsForms>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="MySql.Data" Version="9.6.0" />
+  </ItemGroup>
+
+</Project>

TestWins.csproj.user

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <ItemGroup>
+        <Compile Update="Form1.cs">
+            <SubType>Form</SubType>
+        </Compile>
+    </ItemGroup>
+</Project>

winforms-sql-connection.sln

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+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.2.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TestWins", "TestWins\TestWins.csproj", "{27D407B4-FF31-33C0-D274-32E053605027}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{27D407B4-FF31-33C0-D274-32E053605027}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{27D407B4-FF31-33C0-D274-32E053605027}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{27D407B4-FF31-33C0-D274-32E053605027}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{27D407B4-FF31-33C0-D274-32E053605027}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {0FB4CEA9-6018-405A-B2FE-C4C60BAC6F71}
+	EndGlobalSection
+EndGlobal