How to Fix \'System.TypeInitializationException\' When Connecting to a MySQL Database in an Android App?

Troubleshooting the Connection Issue in AndroidApp and MySqlConnection

Issue:
When attempting to establish a database connection using MySqlConnection, an error message is encountered:

System.TypeInitializationException: The type initializer for 'MySql.Data.MySqlClient.Replication.ReplicationManager' threw an exception.

Cause:
This error often occurs due to a conflict between the MySql.Data package and the Android runtime environment.

Resolution:

To resolve this issue, the MySql.Data package should be replaced with the MySqlConnector package. Here are the detailed steps to implement the solution:

1. Install the MySqlConnector NuGet package:

   Install the latest version of the MySqlConnector package from NuGet: https://www.nuget.org/packages/MySqlConnector/.

2. Modify the code:

   Update the connection establishment code by replacing the MySqlConnection class with MySqlConnector.MySqlConnection like so:

   <code class="c#">using MySqlConnector;
   
   public void Connect()
   {
       new I18N.West.CP1250();
   
       string SC;
   
       SC = "server = XXX; Port = 3306; database = XXX; user id = XXX; password = XXX; charset = utf8";
   
       _Conn = new MySqlConnector.MySqlConnection(SC);
   
       _Conn.Open();
   }</code>

3. Rebuild the app:

   Rebuild the Android application to ensure the changes take effect.

Additional Notes:

• If faced with any other compatibility issues, consider updating the Newtonsoft.Json package to version 13.0.1 or later.
• For further assistance, refer to the official MySqlConnector documentation: https://dev.mysql.com/doc/connector-net/en/connector-net-introduction.html

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