Asp. Net Core cross platform, open source, cloud-ready da ishlay oladigan dasturlarni qura oladigan framework. Asp. Net Core xususiyatlari

Asp .Net Core da Middleware bilan amaliy mashg’lot.
app.UseDefaultFiles();
app.UseStaticFiles();
app.UseFileServer();
Static file lar bilan ishlaydigan middlewarelar
app.UseRouting(); - rout bilan ishlaydigan middleware.

app.Use(async (context, next)=>

{
await context.Response.WriteAsync("Middleware 1 ");
await next();
});

//app.UseEndpoints(endpoints =>

//{
// endpoints.MapGet("/", async context =>
// {
// await context.Response.WriteAsync("Main page! ");
// });
// endpoints.MapGet("/Users", async context =>
// {
// await context.Response.WriteAsync("Users page! ");
// });
//});


Static file lar bilan ishlash.

• 
  Contenti o’zgarmaydigan har qanday file.
  
• 
  Odatda static filelarga images, css, js, html filelari tushuniladi
  

Static file lar bilan ishlay oladigan middlewarelar-

1. 
   App.UseStatikFiles().
   
2. 
   App.UseDefaultFiles().
   
3. 
   App.UseFileServer() – universali hisoblanadi
   

Delevoler Exception Page middleware

• 
  Configur methodida birinchi bo’lib pipeline ga qo’shilayotgan middleware bu DeveloperException degan middleware
  
• 
  if (env.IsDevelopment())
  
• 
  {
  
• 
  app.UseDeveloperExceptionPage();
  
• 
  }
  

MVC haqida.

• 
  MVC – Model View Controller – dasturni 3 ta mantiqiy qismlarga bo’luvchi arxitekturaviy pattern deyiladi.
  
• 
  Hozirgi vaqtda aksariyat tizimlar quyidagi 3 ta tizimdan iborat bo’ladi:
  

1. 
   Presentation (UI) – foydalanuvchi interfasi.
   
2. 
   Business Login – tizimning asosiy business logikasi saqlanadigan qatlam.
   
3. 
   Data Access.
   

Controllerdan Viewga ma’lumot uzatish

Controllerdan Viewga ma’lumot uzatishning 3 xil yo’li mavjud :

1. 
   ViewData
   
2. 
   ViewBag
   
3. 
   Strongly Typed Views
   

ViewData – aslida viewdata dictionary, string turidagi kalitni qabul qiladi.

Staff model = _staffRepository.Get(3);
ViewData[“staff”] = model;
ViewData[“title”] = “Staff Details”;

Ushbu ViewData key value per turidagi ma’lumot saqlanuvchi dictionary ekan, u dictionaryga controllerdan turib ma’lumotni beramiz va viewda shu kalit orqali ma’lumotni o’qib olamiz.

Viewda o’qib olish :
@ViewData[“title”]
@{
Var staff = ViewData[“staff”] as StaffManegement.Models.Staff;
}
Va foydalanish quyidagicha : @staff.Firstname , …

ViewBag – dynamic turidagi object.

ViewBag.title = “Staff Details”; uni viewda o’qib olish @ViewBag.title – shu orqali o’qib olinadi.
ViewData bilan ViewBag deyarli bir xil ularning farqi sintaksisda, ularni ishlatganimizda intellijenc ishlamaydi.