![]() ![]() There is one thing you must be aware of, though. If you look in the table you created using Pgadmin, you should see something that looks similar to the data in Figure 8:įigure 8: The data from our program, added to our Postgres tableĪs you can see, the output from the program has been directly inserted into the table you created. Remember to change the ‘g:\npgsql.exe’ part to point to the location you copied your application to. Intsix, intseven, inteight, intnine, intten, linetext) Once you’ve copied the app, in your PgAdmin SQL window, execute the following statement: copy programdata (intone, inttwo, intthree, intfour, intfive, As long as your Postgres server can access that folder via its full folder path, everything will work fine. For you, this might just be as simple as ‘C:\’ or even a temp folder. Because my server is on a different machine, a copied the console app across the network to a known location on the same machine that my copy of Postgres could see. Now, compile and build your console app then, copy the exe to a folder your Postgres database is able to access. Using Pgadmin3, create a new table in your test database, using the following SQL: CREATE TABLE public.programdata If you run your program at this point, you should see something like the output in Figure 7:įigure 7: Output from program data methodĪs you can see, all it simply does is generate 10 lines each containing 10 numbers and an item of text. Var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" Ĭonsole.WriteLine(" CHANNEL Var csb = new NpgsqlConnectionStringBuilder ![]() Private const string PASSWORD = "myPassword" Private const string DATABASE = "MyDatabase" ![]() Private const string SERVER = "MyServer" If you now add the following code to your Program.cs file in your Visual Studio console app project: using System This will create a table in your database that has an auto increment primary key, and two array columns: one that holds an array of integers and one that holds an array of strings. However, once you have a database to use, you then need to execute the following SQL in it, to create a test table for the array example: CREATE TABLE blogarrayĬONSTRAINT blogarray_pkey PRIMARY KEY (pkid) I’m not going to go into the process of creating/setting up a database because there’s not enough space in this post to do so. In my case, I’ve created a database called ‘playground’: Find and run the tool, and then either find or create a database to experiment in (if you need a new one, you can right-click your server and choose ‘New Database’). If you’ve installed Postgres correctly, you should have an application called “Pgadmin”. This means that, when you create a table in the database, you can use an array-like syntax (the same as in. Postgres fully supports arrays as column types. The first thing we’re going to look at is native arrays. Once you have Postgres up and running, fire up Visual Studio, create yourself a simple command line program, and use NuGet to search for and install “NpgSql” Native Database Arrays Going through that process in this post would take too long, but in most cases it’s simply a case of running a standard Windows installer that can be downloaded through this link. To try the examples, you will need to install a current version of the PostgreSQL database and its admin tool, “PgAdmin3”. There is a chance that you can make some of these tricks work by using raw queries in Entity Framework, NHibernate, and other ORMs, but for this post I’ll be ignoring those and concentrating simply on doing this in raw C#. In this post, I’m going to introduce you to a couple of them, and show you how to get direct access to PG by using its native ADO.NET connector. There are a lot of reasons why I do this, and that’s simply because of some of the clever things that you can do with PG. I don’t hide the fact the PostgreSQL is my favourite database, and where possible I try to use it in as many places as possible (and on as many projects as possible). ![]()
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