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  1. C# / .NET
  2. Desktop Dasturlash
  3. WPF (Windows Presentation Foundation)
  4. Qo'shimcha ma'lumotlar

Argument berish

CSharp N1 Jamoasi

PreviousResurslarNextSon va Vaqtni Formatlash

Last updated 4 years ago

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Buyruq satrining parametrlari siz ishlashini ma'lum tarzda o'zgartirish (belgilash) uchun, siz ishlatmoqchi bo'lgan dasturga parametrlar to'plamini yuborish uchun qo'llaniladi. Masalan, tahrirlovchi(notepad) da faylni ochish. Siz Windowsga o'rnatilgan Notepad muharririni quyidagicha ishga tushirishga urinib ko'rishingiz mumkin (Buyruqlar satrini ishga tushiring yoki Win+R kombinatsiyasini bosing):

Sizga Buyruqlar satri ishga tushdi. Endi unga quyidagi buyruqni yozamiz:

notepad.exe c:\Windows\win.ini

Ushbu buyruq win.ini faylini tahrirlovchi(notepad.exe)da ochadi (agar u boshqa joyda joylashgan bo'lsa, win.ini ga yo'lni o'zgartirishingiz kerak bo'ladi). Bloknot unga o'tkazilgan parametrlarni ko'rib chiqadi (ushbu holatda bitta parametr berilyapdi) va ulardan foydalanadi. Yani biz notepad.exe dasturini ishga tushuryapmiz va unga parametr sifatida win.ini beryapmiz, shunda notepad.exe dasturi "c:\Windows" manzilida joylashgan win.ini faylini ochadi.

Siz o'zinggizni WPF dasturingizga ham boshlangich parametrlarni berishingiz mumkin. Ularni App.xaml ga beramiz.

Demak WpfTutorialSamples dasturini yaratamiz va App.xaml ilovasiga o'tamiz. StartupUri hodisasini Startup hodisasiga o'zgartiramiz. So'ng eng birinchi ochiladigan oyna MainWindow.xaml ni Application_Startup(yangi yaratadigan metodimiz) ga o'zgartiramiz. Bu bilan biz Application_Startup metodi MainWindow oynasi yuklanishidan oldin ishlashini ko'rsatgan bo'lamiz.

<Application x:Class="WpfTutorialSamles.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartUp="Application_SartUp">
     <Application.Resources></Application.Resources>
</Application>
<!--             Bu App.xaml ilovasi                          -->

Ishni App.xaml.cs ilovasida davom ettiramiz. Tepada aytib o'tkanimizdek Application_Startup metodini yaratamiz:

private void Application_StartUp(object sender, StartUpEventArgs e)
{
    MainWindow wnd = new MainWindow();
    if (e.Args.Length == 1)
      MessageBox.Show("Now opening file: \n\n" + e.Args[0]);
    wnd.Show();
}
//            Application_StartUp metodi

Demak metodni tahlil qiladigan bo'lsak:

MainWindow turida yangi wnd o'zgaruvchisi elon qilinmoqda;

Buyruqlar satridan kelgan parametrlar sonini 1 ga teng ekani tekshirilib. Kelgan Argumentni MessageBox (xabar ko'rinishi) da "Now opening file:" satridan so'ng yangi qatorga chiqarish buyurilyapdi.

using System;
using System.Collections.Generic;
using System.Windows;

namespace WpfTutorialSamples
{
    public partial class App : Application
    {
        MainWindow wnd = new MainWindow();
        if (e.Args.Length == 1)
            MessageBox.Show("Now opening file: \n\n" + e.Args[0]);
        wnd.Show();
    }
{
//            App.xaml.cs ilovasi

Endi dasturimiz tayyor uni ishga tushursangiz hech qanday hodisa ro'y bermaydi. Sababi biz unga boshlang'ich qiymat bermadik. Uni testlash uchun Visual Studio ni mavjud bo'lgan buyruqlar satrini ishlatsak bo'ladi:

Yuqoridagi menyuda [Проект] ni tanlaymiz, keyin Свойства: [Dastur nomi] bo'limiga kiramiz. Ochilgan oynadan Отладка bo'limini tanlaymiz:

Buyruqlar satri qiymatlari uchun ajratilgan(qizil chiziqda belgilangan) hududga kerakli buyruqni yozamiz. Yozilgan buyruq matn sifatida qabul qilinadi va xabar sifatida ekranga chiqadi:

Endi dasturimizni Buyruqlar satri dan ishga tushiramiz va unga Parametr sifatida "SalomWPF" matnini beramiz: Buyruqlar satri ga dasturimizni joylashgan joyi va nomini ko'rsatamiz va bitta bo'sh joy qoldiramiz. Chunki Buyruqlar satri Parametrlarni sonini aynan shu bo'sh joylarga qarab aniqlaydi.

D:\WpfTutorialSamples.exe SalomWPF

Buyruqlar satri
[Свойства] bo'limi
MessageBox
CMD
Natija