About handwritten Ajax, how to implement asynchronous refresh by handwritten Ajax

Callback is a function name, which is the function body to be executed by the event, and the reason why it is called callback is that the programmer himself thinks that he has a little personality (custom function name), you can call it any name, and then go to implement this custom function body. That's why there's one on it; And then there's a function callback(){ below.}

Use LINQ to connect to the database.

2. Import the jQuery file into the project. **Written in.

3. Write the following on the refreshed page**. **Written in.

--Call jquery --%

How simple? There should be a lot of programs on the Internet.

It's been sent to you, you see.

AJAX is a way for front-end JS to interact with back-end scripting languages, either synchronously or asynchronously. It uses the xmlhttprequest object of js, either purely handwritten or jquery's $.ajax, they are all implementations of ajax.

[ "get", "post" ],function( i, method )

return ;

This is the source code of jquery, and there are too many source code for ajax, you can check it out.

Finally, use jquery ajax, if you use js primitive ajax, you have to write the original asynchronous object by hand.

I won't look at you, I can't understand it.

Give you ideas. Technical Requirements:

JS will be used to add the option tag to the select.

Will use ajax

Data processing is returned for ajax.

There are several types of treatments.

After that he returns the full select to the foreground and inserts it directly with innerhtml for the easiest.

Returns a string separated by a split symbol in the middle of the name=value e.g., |and so on, go to the foreground and use the js string function split to return the array. Each array element value is a name=value style with a =sign==or a splitter in the middle.

with jsonxml

var email = $("#mail").val();

AJAX starts.

ajax(,cache: false,async: false, whether asynchronous.

datatype: "html", the returned data type is success: function (data)else, error: function ().

//end ajax

data, op supplemented.

Multiple methods can be written in a processing file, and the op parameter is derived in order to effectively identify and call that method.

You need to do the following in the processing file.

public void processrequest(httpcontext context);;

Do you use onblur.

I see that your parentheses here seem to be in Chinese:

onblur="mailblur()"

4 common ways to request AJAX in jQuery:

1.$.ajax() returns the xmlhttprequest object it created.

ajax() has only one parameter: the parameter key value object, which contains the configuration and function information. See below for detailed parameter options.

If you specify the DataType option, make sure that the server returns the correct MIME information, such as XML"text/xml")。

Example: Save data to the server, and display information when successful.

ajax();

2.Load information via a remote http get request.

This is a simple get request feature to replace the complex $ajax 。When the request is successful, you can call the ** function. If you need to execute a function on the event of an error, use $ajax。

Example: . .get("", ,function(data), function (data) {

if (data == "ok") {

alert("Added successfully! ");

4.Load JSON data via an HTTP GET request.

Example: . .each(, function(i,item){

").attr("src", "#images");

if ( i == 3 ) return false;

Hope it works for you.