How to form connection between HSQLDB and C# .net?

Question

How to form connection between HSQLDB and C# .net ? I have already looked at SharpHSQL and H2Sharp but not able to connect the HSQLDB.

Answer 1

Basic steps:

1. Download IKVM.NET and HyperSQL (=HSQLDB) driver.

2. Convert HSQLDB Java driver to .NET DLL using IKVM.NET to create a hsqldb.dll
   

3. Add compile time dependencies to your C# project:

• hsqldb.dll
  
• IKVM.OpenJDK.Core.dll
• IKVM.OpenJDK.Jdbc.dll

4. Add runtime dependencies when running your C# program:
   

• IKVM.OpenJDK.Localedata.dll
  
• IKVM.OpenJDK.Text.dll
  
• IKVM.OpenJDK.Util.dll
  
• IKVM.Runtime.dll
  

5. Add connection string to your app.config :

6. C# code:

using System;
using System.Configuration;
 
namespace HyperSQL
{
    class Program
    {
        readonly static string CONNECTION_STRING = ConfigurationManager.ConnectionStrings["HyperSQL"].ConnectionString;
        const string SQL = "SELECT * FROM customer";
 
        static void Main(string[] args)
        {
            java.sql.DriverManager.registerDriver(new org.hsqldb.jdbcDriver());
            using (java.sql.Connection conn = java.sql.DriverManager.getConnection(CONNECTION_STRING))
            {
                java.sql.PreparedStatement ps = conn.prepareStatement(SQL);
                using (java.sql.ResultSet rs = ps.executeQuery())
                {
                    while (rs.next())
                    {
                        Console.WriteLine($"ID={rs.getInt("id")}");
                        Console.WriteLine($"NAME={rs.getString("name")}");
                        Console.WriteLine($"AGE={rs.getInt("age")}");
                        Console.WriteLine($"ADDRESS={rs.getString("address")}");
                        Console.WriteLine($"SALARY={rs.getInt("salary")}");
 
                        Console.WriteLine("------------------");
                    }
                }
            }
 
            Console.ReadLine();
        }
    }
}

Here my detailed tutorial how to connect to HyperSQL from C#