How to make database connection in ASP.NET core with postgres SQL?
use the Npgsql EF Core provider, add a dependency on Npgsql.EntityFrameworkCore.PostgreSQL. You can follow the instructions in the general EF Core Getting Started docs. https://www.npgsql.org/efcore/
Question:
How to make database connection in ASP.NET core with postgres SQL?
There are two ways you add your postgresql
database along with the asp.net core
project.
Using follwing way:
ADO.net connection provider
Nuget extension: Npgsql.EntityFrameworkCore.PostgreSQL
ADO.net connection provider
Here would just need the NpgsqlConnection
connection builder class which will execute your sql
on Postgre sql
database server. See the example below:
C# ASP.NET Core & Postgre SQL Ado.net example:
NpgsqlConnection conn = new NpgsqlConnection("Server=127.0.0.1;User Id=postgres;Password=pwd;Database=postgres;");
conn.Open();
// Passing PostGre SQL Function Name
NpgsqlCommand command = new NpgsqlCommand("EXE GetEmployeePrintInfo", conn);
// Execute the query and obtain a result set
NpgsqlDataReader reader = command.ExecuteReader();
// Reading from the database rows
List<string> listOfManager = new List<string>();
while (reader.Read())
{
string WSManager = reader["WSManager"].ToString(); // Remember Type Casting is required here it has to be according to database column data type
listOfManager.Add(WSManager);
}
reader.Close();
command.Dispose();
conn.Close();
Npgsql.EntityFrameworkCore.PostgreSQL:
You have to add Nuget extension
into the project reference from manage Nuget Packages
using Visual studio
. Entity framework core
has this functionality for many database providers. Just follow below steps on visual studio
ConfigureServices in startup.cs:
Once you successfully added the Nuget package
then you have to update following code on your project ConfigureServices
under startup.cs
services.AddDbContext<YourDatabaseContextClassName>(options =>
options.UseNpgsql(Configuration.GetConnectionString("YourDatabaseContextStringNameFromAppsettings")));
Note:
If you need any example forentityframework
andPostgre SQL
implementation you can have look here
For further assistance you can have look on official document here . Hope it would guide you accordingly.
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