https://github.com/karenpayneoregon/appsettings-basics
Working with appsetting.json, see branch AccessSqEntity
https://github.com/karenpayneoregon/appsettings-basics
appsettings chsarp
Last synced: about 2 months ago
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Working with appsetting.json, see branch AccessSqEntity
- Host: GitHub
- URL: https://github.com/karenpayneoregon/appsettings-basics
- Owner: karenpayneoregon
- Created: 2021-08-06T09:13:14.000Z (almost 5 years ago)
- Default Branch: master
- Last Pushed: 2022-12-27T15:03:32.000Z (over 3 years ago)
- Last Synced: 2025-03-23T18:17:37.655Z (over 1 year ago)
- Topics: appsettings, chsarp
- Language: C#
- Homepage:
- Size: 1.11 MB
- Stars: 2
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: readme.md
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README
# Appsetting connection library for .NET Core projects
Provides samples for using appsettings.json for .NET Core/C# 9 instead of using app.config
- Currently there is only one example for working with SQL-Server, later other examples will following.
- Proper usage is to keep, in this case SqlServerConnectionLibrary project in this solution, when needed for your solution reference this project's DLL
## Addendum
The only difference between `Oracle` and `SQL-Server` is the actual `connection string`. The methods used are the same for telling Oracle how to connect to your database.
For SQL-Server we have three environments
```json
{
"ConnectionStrings": {
"DevelopmentConnection": "Data Source=.\\SQLEXPRESS;Initial Catalog=NorthWind2020;Integrated Security=True",
"ProductionConnection": "Data Source=ProductionServer;Initial Catalog=NorthWind2020;Integrated Security=True",
"TestConnection": "Data Source=TestServer;Initial Catalog=NorthWind2020;Integrated Security=True",
"Environment": 2
}
}
```
To get the default connection, in this case `Development`
```csharp
public static bool ConnectionTest()
{
Helper.Initializer();
using var cn = new SqlConnection() { ConnectionString = Helper.ConnectionString };
try
{
cn.Open();
return true;
}
catch (Exception)
{
return false;
}
}
```
How are environments known
```csharp
public enum Environments
{
Production,
Test,
Development
}
```
An enum is used rather than a string as a string can be mistyped and cause a runtime error.
Note that Helper.Initializer(); need only be called once in an application, not for each call.
Example
```csharp
using System.Data.SqlClient;
using SqlServerConnectionLibrary;
namespace AppSettingsCoreUnitTestProject.Classes
{
public class SqlOperations
{
public static string ConnectionString = "";
public static CustomerRelation GetCustomers()
{
InitializeConnection();
CustomerRelation customer = new();
var selectStatement = "TODO";
using var cn = new SqlConnection() { ConnectionString = ConnectionString };
using var cmd = new SqlCommand() { Connection = cn, CommandText = selectStatement };
cn.Open();
var reader = cmd.ExecuteReader();
if (reader.HasRows)
{
reader.Read();
customer.CustomerIdentifier = reader.GetInt32(0);
customer.CompanyName = reader.GetString(1);
customer.City = reader.GetString(2);
customer.PostalCode = reader.GetString(3);
customer.ContactId = reader.GetInt32(4);
customer.CountryIdentifier = reader.GetInt32(5);
customer.Country = reader.GetString(6);
customer.Phone = reader.GetString(7);
customer.PhoneTypeIdentifier = reader.GetInt32(8);
customer.ContactPhoneNumber = reader.GetString(9);
customer.ModifiedDate = reader.GetDateTime(10);
customer.FirstName = reader.GetString(11);
customer.LastName = reader.GetString(12);
}
return customer;
}
private static void InitializeConnection()
{
if (!string.IsNullOrWhiteSpace(ConnectionString)) return;
Helper.Initializer();
ConnectionString = Helper.ConnectionString;
}
}
}
```