Using PostGIS from LinqPad

alexkof · December 10

Hi, I'm trying to use PostGIS - and extension of Postgre which allows to work with geometries.

Before that I was working similar way with geopackage format which is actually almost similar thing but in SQLite format. I got byte[] as a result and manually converted them to NetTopolySuite geometries.

I use Linq2DB driver, when I connect I see following error:

Reading as 'System.Object' is not supported for fields having DataTypeName 'public.geometry'

Is there some know simple way to use such databases in LinqPad? Can I somehow receive bytes or map to geometry objects?

alexkof · December 11

Found out that in my app code I have to do following:

var dataSourceBuilder = new NpgsqlDataSourceBuilder(connectionString);
dataSourceBuilder.UseNetTopologySuite();
var dataSource = dataSourceBuilder.Build();

public sealed class MyConnection : DataConnection
{
    public MyConnection(NpgsqlDataSource dataSource)
        : base(new DataOptions()
            .UseConnectionFactory(
                PostgreSQLTools.GetDataProvider(PostgreSQLVersion.v95),
                _ => dataSource.CreateConnection()))
    {
    }
    ...
}

But not sure if it is possible in LinqPad using native LinqPad connections infrastructure

Using PostGIS from LinqPad

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