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Asp Ajax in ASP

Asp Ajax in ASP

AJAX in Classic ASP means using JavaScript in the browser to asynchronously communicate with your ASP server scripts—usually to fetch or send data without reloading the whole page.


How AJAX works with Classic ASP

  1. Client Side: JavaScript uses XMLHttpRequest (or fetch) to send a request to an ASP page.

  2. Server Side: ASP script processes the request, runs queries or logic, and returns data (usually HTML, XML, or JSON).

  3. Client Side: JavaScript receives the response and updates the webpage dynamically.


Simple Example: AJAX call to an ASP page

Client-side HTML + JavaScript

<!DOCTYPE html><html><head><title>AJAX with Classic ASP</title><script>function loadData() {  var xhr = new XMLHttpRequest();  xhr.open("GET", "getdata.asp", true);  xhr.onreadystatechange = function() {    if (xhr.readyState == 4 && xhr.status == 200) {      document.getElementById("result").innerHTML = xhr.responseText;    }  };  xhr.send();}</script></head><body><button onclick="loadData()">Get Data</button><div id="result"></div></body></html>

Server-side ASP (getdata.asp)

<%' Example: return some data (e.g. from DB or static)Response.Write "Current server time: " & Now()%>

Notes:

  • You can return HTML, plain text, XML, or JSON from the ASP page.

  • To return JSON, build a JSON string manually or use a helper.

  • On the client, you parse JSON with JSON.parse() and update UI accordingly.


More advanced:

  • Use POST requests to send form data.

  • Implement AJAX pagination, search filters, or form submissions without reload.

  • Use libraries like jQuery AJAX to simplify calls.


Want me to show a jQuery AJAX example with Classic ASP or return JSON from ASP?

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