AJAX va ASP

AJAX ko‘proq interaktiv ilovalar yaratish uchun ishlatiladi.

AJAX ASP misoli

Quyidagi misolda foydalanuvchi kiritish maydoniga belgilar kiritayotganda veb-sahifa veb-server bilan qanday bog‘lanishi mumkinligini ko‘rsatadi:

Misol

Start typing a name in the input field below:

Suggestions:

First name:

Misol tahlili

Yuqoridagi misolda, foydalanuvchi kiritish maydoniga belgi yozganda, funksiya showHint() nomli bajariladi.

Funksiya onkeyup hodisasi tomonidan ishga tushiriladi.

Mana kod:

Misol

<p>Start typing a name in the input field below:</p>
<p>Suggestions: <span id="txtHint"></span></p>

<form>
First name: <input type="text" onkeyup="showHint(this.value)">
</form>

<script>
function showHint(str) {
  if (str.length == 0) {
    document.getElementById("txtHint").innerHTML = "";
    return;
  } else {
    const xmlhttp = new XMLHttpRequest();
    xmlhttp.onload = function() {
      document.getElementById("txtHint").innerHTML = this.responseText;
    }
  xmlhttp.open("GET", "gethint.asp?q=" + str);
  xmlhttp.send();
  }
}
</script>

O‘zingiz sinab ko‘ring »

Code explanation:

Avval kiritish maydoni bo‘shligini tekshiring (str.length == 0). Agar bo‘sh bo‘lsa, txtHint joy egallovchisining tarkibini tozalang va funksiyadan chiqing.

Biroq, kiritish maydoni bo‘sh bo‘lmasa, quyidagilarni bajaring:

XMLHttpRequest obyektini yaratish
Server javobi tayyor bo‘lganda bajariladigan funksiyani yarating
So‘rovni serverdagi ASP fayliga (gethint.asp) yuborish
E’tibor bering, q parametr qo‘shilgan gethint.asp?q="+str
str o‘zgaruvchisi kirish maydonining mazmunini saqlaydi

ASP fayli - "gethint.asp"

ASP fayli nomlar massivini tekshiradi va mos keladigan nom(lar)ni brauzerga qaytaradi:

<%
response.expires=-1
dim a(30)
'Fill up array with names
a(1)="Anna"
a(2)="Brittany"
a(3)="Cinderella"
a(4)="Diana"
a(5)="Eva"
a(6)="Fiona"
a(7)="Gunda"
a(8)="Hege"
a(9)="Inga"
a(10)="Johanna"
a(11)="Kitty"
a(12)="Linda"
a(13)="Nina"
a(14)="Ophelia"
a(15)="Petunia"
a(16)="Amanda"
a(17)="Raquel"
a(18)="Cindy"
a(19)="Doris"
a(20)="Eve"
a(21)="Evita"
a(22)="Sunniva"
a(23)="Tove"
a(24)="Unni"
a(25)="Violet"
a(26)="Liza"
a(27)="Elizabeth"
a(28)="Ellen"
a(29)="Wenche"
a(30)="Vicky"

'get the q parameter from URL
q=ucase(request.querystring("q"))

'lookup all hints from array if length of q>0
if len(q)>0 then
hint=""
for i=1 to 30
    if q=ucase(mid(a(i),1,len(q))) then
      if hint="" then
        hint=a(i)
      else
        hint=hint & " , " & a(i)
      end if
    end if
next
end if

'Output "no suggestion" if no hint were found
'or output the correct values
if hint="" then
response.write("no suggestion")
else
response.write(hint)
end if
%>

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