C#•15mo ago

✅ Endpoints

hi 🙂 can anyone explain why 1 code works and scond no?

app.UseRouting();

app.UseEndpoints(endpoints =>
{
    endpoints.MapGet("/products/{id}", async (context) =>
   {
       var id = Convert.ToInt32(context.Request.RouteValues["id"]);
       await context.Response.WriteAsync($"ID {id}");
   });
});

app.UseRouting();

app.UseEndpoints(endpoints =>
{
    endpoints.MapGet("/products/{id}", async (context) =>
   {
       var id = Convert.ToInt32(context.Request.RouteValues["id"]);
       await context.Response.WriteAsync($"ID {id}");
   });
});

app.MapGet("/products/{id}", async (context) =>
{
    var id = Convert.ToInt32(context.Request.RouteValues["id"]);
    await context.Response.WriteAsync($"ID {id}");
});

app.MapGet("/products/{id}", async (context) =>
{
    var id = Convert.ToInt32(context.Request.RouteValues["id"]);
    await context.Response.WriteAsync($"ID {id}");
});

also there is third way, but how to get HttpContext here?

app.MapGet("/products/{id}", (string id) => $"Id :{id}");

app.MapGet("/products/{id}", (string id) => $"Id :{id}");

8 Replies

wwwwOP•15mo ago

ok, i solved it by myself, wasn't working cuz

app.Run(async (context) =>
{
    context.Response.StatusCode = 404;
    await context.Response.WriteAsync("Page not Found");
});

app.Run(async (context) =>
{
    context.Response.StatusCode = 404;
    await context.Response.WriteAsync("Page not Found");
});

on the end but still, which is better and conventional way to create endpoints?

Angius•15mo ago

The last one is best There's no need to ever use Request and Response Just bind the data you want to get, and return the data you want to return Anything else is giving yourself more work than is necessary for no reason at all Also, don't use Convert.ToInt32, use int.TryParse() Or better yet, with parameter binding... you can just get the integer in the first place No need to convert anything

wwwwOP•15mo ago

forget i can just

return $"ID: {id}";

return $"ID: {id}";

Angius•15mo ago

app.MapGet("/products/{id}", (int id) => $"Id :{id}");

app.MapGet("/products/{id}", (int id) => $"Id :{id}");

yeah

wwwwOP•15mo ago

Thanks again 🐗

wwwwOP•15mo ago

Btw, If I understand it correctly, it should work something like this?

Angius•15mo ago

It can, yes

wwwwOP•15mo ago

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✅ Endpoints