ISession Extension methods

net 6 newbie 121

For creating/adding sessions I am using

app.UseSession(); // middleware
registering services as
builder.Services.AddSession(options =>
{
options.Cookie.Name = "Session";
options.IdleTimeout = TimeSpan.FromSeconds(500);
options.Cookie.HttpOnly = true;
options.Cookie.IsEssential = true;
options.Cookie.SameSite = SameSiteMode.Lax;
});

It is working fine. But my question is

the extension methods SetString(),GetString() on ISession interface are not found in the app.UseSession() middleware.
Then how this extension methods are working.

I have searched the src files in the following link but could not find where the extension methods are declared.

https://github.com/dotnet/aspnetcore/tree/main/src/Middleware/Session

AgaveJoe 26,201 Reputation points

2022-06-27T11:03:08.573+00:00

Your goal is not clear.

AddSession() configures the middleware when the application starts. SetString() and GetString() are accessed during runtime in a Razor Page, controller, or passed to a type via constructor injection.

Are you trying to build custom middleware that needs access to session? Can you explain the use case?

net 6 newbie 121

I want to know where the SetString() and GetString() extension methods/Functions are declared.
ISession by default has the following code

public interface ISession
{

    bool IsAvailable { get; }  
      
    string Id { get; }  
     
    IEnumerable<string> Keys { get; }  

     
    void Clear();  
     
    Task CommitAsync(CancellationToken cancellationToken = default);  
      
    Task LoadAsync(CancellationToken cancellationToken = default);  
     
    void Remove(string key);  
      
    void Set(string key, byte[] value);  
      
    bool TryGetValue(string key, [NotNullWhen(true)] out byte[]? value);  
}

AgaveJoe 26,201 Reputation points

2022-06-27T11:26:53.69+00:00

I want to know where the SetString() and GetString() extension methods/Functions are declared.

You want the community to find the source on github for you???

https://github.com/dotnet/aspnetcore/blob/a450cb69b5e4549f5515cdb057a68771f56cefd7/src/Http/Http.Extensions/src/SessionExtensions.cs

If you're asking how to reference the methods, then you need to add "using Microsoft.AspNetCore.Http" to the top of the page as explained in the reference documentation.

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/app-state?view=aspnetcore-6.0#set-and-get-session-values

Extension Methods (C# Programming Guide)
net 6 newbie 121 Reputation points

2022-06-27T11:34:52.977+00:00

Thanks!

I thought Session middleware is adding these methods and searched only in the middleware.

I have been searching only https://github.com/dotnet/aspnetcore/tree/main/src/Middleware/Session

If namespace Microsoft.AspNetCore.Http;
contain these methods what is the need of the Session middleware.?

And could not find it.
AgaveJoe 26,201 Reputation points

2022-06-27T12:09:31.563+00:00

Extension methods add functionality to a class without modifying the class or deriving form the class. Please read the extension method reference documentation so you understand the technical intention of extension methods.

Extension Methods (C# Programming Guide)

Session middleware is state management feature in ASP.NET Core. The Microsoft.AspNetCore.Http namespace is simply where the SetString() and GetString() extension methods are located in the code base. The using statement is needed in order for the compiler to see (syntactic sugar) SetString() and GetString().