如何在 asp.net mvc 核心的 program.cs 中添加 pgadmin db

Question

builder.Services.AddDbContext<DEM_MASTERSContext>(options => options.UseSQLserver(builder.Configuration.GetConnectionString("Database")));

how to add connection string for pgadmin 4, above one is for sqlserver

Answer 1

for postgres you can add like this

services.AddDbContext<PostgreSqlContext>(options =>
        options.UseNpgsql(Configuration.GetConnectionString("Database")));

For more you can follow this or this

Answer 2

pgadmin4 is not a database, Do you want to ask how to connect to PostgreSQL?

First, you need to add NuGet package:

dotnet add package Npgsql.EntityFrameworkCore.PostgreSQL

Then, you need to add connectionstring in appsettings.json :

{
    "ConnectionStrings": {
        "WebApiDatabase": "Host=localhost; Database=xxx; Username=xxx; Password=xxx"
    },
}

Finally configure it like this:

services.AddDbContext<xxxContext>(options =>
        options.UseNpgsql(Configuration.GetConnectionString("ConnectionStrings")));