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Need help with Auto Complete Script

Greenhorn

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posted 11 years ago

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Hi, recently my clients have asked me to change all the text input types to the auto complete suggestion boxes(Thanks to google's Auto Complete...)
I am good at server side programming but dont know how to make this work. If any one can suggest me some good script or tutorial , it will be really helpful.

Thanks in advance.

Regards,
Javagenious

Bear Bibeault

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posted 11 years ago

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Justin Fox

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posted 11 years ago

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auto complete is pretty easy actually, I believe <input type="text"/> has an event called onKeyUp, so you can get the text in the textbox every time they type...

so if they were typing 'Nike'

when they type the 'N' query your shoes table for 'Like "N%" '.

results for example:

New Balance
Nike

and then when they type 'Ni' query your shoes table for ' Like "Ni%" '.

results:

Nike

To do this you'll probably need to use ajax, because refreshing the page would look silly.

Justin

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Sandy Joshi

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posted 11 years ago

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HI,
Thanks for the response. Can you give me any Hint how can i handle that in Ajax. I mean how can i send the string which i capture on keyup and prepare an Ajax request for the same.

Thanks

Regards,
Javagenious

Justin Fox

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posted 11 years ago

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function AJAXLib(URL)
{
this.URL = URL;
var responseT = "empty";

this.ExecuteNoParam = function(){
var ajaxRequest;

try
{
	// Opera 8.0+, Firefox, Safari
	ajaxRequest = new XMLHttpRequest();
} 
catch (e)
{
	// Internet Explorer Browsers
	try
	{
		ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
	} 
	catch (e) 
	{
		try
		{
			ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			
		} 
		catch (e)
		{
			// Something went wrong
			alert("Your browser broke!");
			return false;
		}
	}
}

ajaxRequest.onreadystatechange = function()
	{
		if(ajaxRequest.readyState == 4)
		{
			//nothing;
		}
	}

ajaxRequest.open("GET", this.URL, true);
ajaxRequest.send(null);
 
}//End Execute() Function

this.Execute = function(myfunctionref){
var ajaxRequest;

ajaxRequest.onreadystatechange = function()
	{
		if(ajaxRequest.readyState == 4)
		{
			myfunctionref(ajaxRequest.responseText);
		}
	}

ajaxRequest.open("GET", this.URL, true);
ajaxRequest.send(null);
 
}//End Execute(myfunctionref) Function
}//End AJAXLib Class

the code above, just put into a file and save as AJAXLib.js

In the <head></head> of your html file just put:

<script type = "text/javascript" src = "directory/AJAXLib.js"></script>

now in a function that you call on onKeyUp, we'll call it autoComplete(this.value).
So the tag would look like <input type="Text" onclick="autoComplete(this.value)" />

and...

The reason you have to make a callBackFunction is because when you make an ajax request, the response doesn't happen right away so you have to make a callbackfunction to handle the event when the response is ready to be dealt with.

Justin

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