WebPages formalari
Forma — HTML hujjatining kiritish elementlari (matn maydonlari, belgilash katakchalari, radio tugmalar va ochiladigan ro‘yxatlar) joylashtiriladigan qismi.
HTML kiritish sahifasini yaratish
Razor misoli
<html>
<body>
@{
if (IsPost) {
string companyname = Request["CompanyName"];
string contactname = Request["ContactName"];
<p>You entered: <br />
Company Name: @companyname <br />
Contact Name: @contactname </p>
}
else
{
<form method="post" action="">
Company Name:<br />
<input type="text" name="CompanyName" value="" /><br />
Contact Name:<br />
<input type="text" name="ContactName" value="" /><br /><br />
<input type="submit" value="Submit" class="submit" />
</form>
}
}
</body>
</html>
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Razor misoli - rasmlarni ko‘rsatish
Faraz qilaylik, rasmlar papkangizda 3 ta rasm bor va siz rasmlarni foydalanuvchi tanloviga ko‘ra dinamik ravishda ko‘rsatmoqchisiz.
Buni ozgina Razor kodi yordamida osongina amalga oshirish mumkin.
Agar veb-saytingizdagi images papkasida "Photo1.jpg" nomli rasm bo‘lsa, uni HTML <img> elementi yordamida quyidagicha ko‘rsatishingiz mumkin:
<img src="images/Photo1.jpg" alt="Sample" />
Quyidagi misol foydalanuvchi ochiladigan ro‘yxatdan tanlagan rasmni qanday ko‘rsatishni namoyish etadi:
Razor misoli
@{
var imagePath="";
if (Request["Choice"] != null)
{imagePath="images/" + Request["Choice"];}
}
<!DOCTYPE html>
<html>
<body>
<h1>Display Images</h1>
<form method="post" action="">
I want to see:
<select name="Choice">
<option value="Photo1.jpg">Photo 1</option>
<option value="Photo2.jpg">Photo 2</option>
<option value="Photo3.jpg">Photo 3</option>
</select>
<input type="submit" value="Submit" />
@if (imagePath != "")
{
<p>
<img src="@imagePath" alt="Sample" />
</p>
}
</form>
</body>
</html>
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Misol izohi
Server imagePath nomli o‘zgaruvchi yaratadi.
HTML sahifada Choice nomli ochiladigan ro‘yxat (<select> elementi) bor. U foydalanuvchiga tushunarli nomni (masalan, Photo 1) tanlash imkonini beradi va sahifa veb-serverga yuborilganda fayl nomini (masalan, Photo1.jpg) uzatadi.
Razor kodi Choice qiymatini Request["Choice"] orqali o‘qiydi. Agar unda qiymat bo‘lsa, kod images/Photo1.jpg rasmiga yo‘l hosil qiladi va uni imagePath o‘zgaruvchisida saqlaydi.
HTML sahifada rasmni ko‘rsatish uchun <img> elementi bor. Sahifa ko‘rsatilganda src atributiga imagePath o‘zgaruvchisining qiymati beriladi.
Nomsiz rasmni ko‘rsatishga urinishning oldini olish uchun (masalan, sahifa birinchi marta ko‘rsatilganda) <img> elementi if bloki ichiga joylashtirilgan.
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