Difference between revisions of "Connect MySQL to ASP.Net Web App"

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(→‎Creating the connection)
(→‎Using the Connection)
 
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Just for this example we will be retrieving the details from the user table, so I created this class to store each record, it should be inside the subclass of `PageModel` :
 
  
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You need to have a local webserver running with an installation of MySQL & PHP. I have used the USBWebServer from your SQL lessons. I have also created this connection string. The string below includes the name of the database, mine is just called `test`. The string should be inside the subclass of `PageModel`:
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public class User
 
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{
 
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    public string username { get; set; }
 
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    public string password { get; set; }
 
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    public int status { get; set; }
 
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}
 
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Next I created a list of User to store the retrieved data, it should be inside the subclass of `PageModel`:
 
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public static List<User> users = new List<User>();
 
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I have also created this string for the connection string, it should be inside the subclass of `PageModel`:
 
  
 
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== Getting the data==
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==Using the Connection==
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Now, in the constructor method I have added the following code:
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Now, in the OnGet method I have added the following code, which will create, open, and close the database connection:
 
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public IndexModel(ILogger<IndexModel> logger)
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public void OnGet()
 
{
 
{
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    _logger = logger;
 
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     using var connection = GetConnection; // this gets the connection
 
     using var connection = GetConnection; // this gets the connection
  
 
     connection.Open(); // you must open the connection
 
     connection.Open(); // you must open the connection
 
              
 
              
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     using var Command = new MySqlCommand("SELECT * FROM test;", connection ); // you can add your SQL into a command
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     connection.Close();
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    using var reader = Command.ExecuteReader(); // you execute the query
 
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    while (reader.Read())
 
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    {
 
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        User temp = new User(); // create user
 
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        temp.username = reader.GetString(0);
 
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        temp.password = reader.GetString(1);
 
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        temp.status = reader.GetInt32(2);
 
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        users.Add(temp); // add user to list
 
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    }
 
 
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Latest revision as of 07:24, 23 October 2024

Install MySQL.Data

Using the Nuget Package Manager install the following:

  • MySql.Data;
  • MySql.Data.MySqlClient;

Creating the connection

Now using the page you want to connect, open the Model `cs` code.

At the top add the following 

using MySql.Data;
using MySql.Data.MySqlClient;


You need to have a local webserver running with an installation of MySQL & PHP. I have used the USBWebServer from your SQL lessons. I have also created this connection string. The string below includes the name of the database, mine is just called `test`. The string should be inside the subclass of `PageModel`: 

string connection = "server=localhost;user=root;database=test;port=3306;password=usbw;";

Finally I created this method to get the connection, it should be inside the subclass of `PageModel`: 

        public MySqlConnection GetConnection 
        {
            get
            {
                return new MySqlConnection(connection);
            }
        }

Using the Connection

Now, in the OnGet method I have added the following code, which will create, open, and close the database connection: 

public void OnGet()
{
    using var connection = GetConnection; // this gets the connection

    connection.Open(); // you must open the connection
            
    connection.Close();
}
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