- Working with a PostgreSQL database in C# is like dancing with a partner, but instead of physical steps, we’re moving data.π
- Creating a database is like building a house; you start with a strong foundation and then add the details.π
- Accessing data from the database is like opening a treasure chest full of valuable information.π°
- Configuring the data connection is like setting up the perfect blind date; everything needs to be just right for it to work out.π
π Introduction
In this tutorial, we will create a CSP and connect it to PostgreSQL in order to work with the database. We will discuss the entire process, from setting up the CSP, connecting it to PostgreSQL, and creating a database.
π‘ Key Takeaways:
We will cover the process of creating a database, working with tables, and implementing functions and triggers.
Before delving into the specifics, let’s first explore the process of connecting to the database.
π Connecting to the Database
To begin, we need to set up a PostgreSQL database. We will use the PG Admin 4 tool to achieve this. Once the database is set up, we’ll move on to creating a table.
| Steps | Description |
|---|---|
| 1 | Open PG Admin 4 |
| 2 | Right-click on ‘Databases’ and select ‘Create’. |
| 3 | Enter the name of the new database, for example, ‘students’. |
| 4 | Click ‘Save’ to create the database. |
Now that the database is created, we can proceed to setting up the tables.
π List of Functions to Be Implemented:
- Creation of tables
- Setting up columns and data types
- Assigning primary keys and constraints
π¨ Setting up Tables
We will work with the ‘students’ database and proceed to set up our first table.
| Field | Type | Constraints |
|---|---|---|
| ID | Integer | Primary Key |
| fio | Text | Not Null |
| position | Text | Not Null |
| salary | Numeric | Not Null |
By following these steps, we successfully create a table within the database.
π Retrieving Data from the Database
In order to retrieve data from the database, we establish a connection and execute the relevant commands.
// C# code to retrieve data from the database
SQLConnection.Open();
SQLCommand.ExecuteCommand();
SQLDataReader.Read();
// Data is displayed in the DataGridView
π Conclusion
This tutorial covers the initial steps of setting up and connecting to a PostgreSQL database. In the upcoming sessions, we will further enhance our application by implementing operations such as adding, updating, and deleting data directly from the client side. Additionally, we’ll optimize the program for efficiency.
I hope you found this tutorial helpful. Stay tuned for more upcoming sessions! π
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