there is no parameter coming for mysqlcommand in WPF in .net..

DbCommand[^] accepts only reference to your connection and command text (query). Optionally, you can create command from connection itself. Check my example:

// Create MySql connection
using (var sqlConn = new MySqlConnection("your connection string"))
{
    // Open connection
    sqlConn.Open();

    // Create new command
    using (var cmd = sqlConn.CreateCommand())
    {
        // Set command text
        cmd.CommandText = "your sql query with @paramName";

        // Add command parameters
        cmd.Parameters.AddWithValue("@paramName", null);

        // Finally call *ONE* of these methods below:
        var numRows = cmd.ExecuteNonQuery(); // UPDATE/DELETE statement
        var value = cmd.ExecuteScalar(); // SELECT single value

        using (var reader = cmd.ExecuteReader()) // SELECT result set
        {
            if (reader.HasRows)
            {
                while (reader.Read())
                {
                    var colValue = reader.GetString(0);
                }
            }
        }
    }
}