Implementing mutual conversion of form elements to JSON by constructing AJAX parameters-JS Tutorial-php.cn

Implementing mutual conversion of form elements to JSON by constructing AJAX parameters

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Release： 2018-05-24 10:25:54

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This article mainly introduces the related introduction of JSON conversion of form elements by constructing AJAX parameters. Friends in need can refer to

ajax submission server data to sort out the conversion methods.

HTML：

<form id="fm" name="fm" action="">
<input name="UserName" type="text" value="UserName1"/>
</form>
<input name="UserId" id="UserId" type="text" value="UserId1"/>

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1. Convert form elements to QueryString

var q = $(&#39;#fm,#UserId&#39;).serialize(); //q = UserName=UserName1&UserId=UserId1

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2. Convert strings to JSON

var obj = jQuery.parseJSON(&#39;{"name":"John"}&#39;);
alert( obj.name === "John" );

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You can use the jquery-json plug-in to achieve conversion and directly quote the example

var thing = {plugin: &#39;jquery-json&#39;, version: 2.3};
var encoded = $.toJSON( thing );
// &#39;{"plugin":"jquery-json","version":2.3}&#39;
var name = $.evalJSON( encoded ).plugin;
// "jquery-json"
var version = $.evalJSON(encoded).version;
// 2.3

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3. Convert form elements to Name, Value array

var arr = $("#fm,#UserId").serializeArray();
/*[ 
{name: &#39;UserName&#39;, value: &#39;"UserName"1&#39;}, 
{name: &#39;UserId&#39;, value: &#39;UserId&#39;}
] */

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4. Convert form elements to JSON

$.fn.serializeObject = function()
{
var o = {};
var a = this.serializeArray();
$.each(a, function() {
if (o[this.name] !== undefined) {
if (!o[this.name].push) {
o[this.name] = [o[this.name]];
}
o[this.name].push(this.value || &#39;&#39;);
} else {
o[this.name] = this.value || &#39;&#39;;
}
});
return o;
};
var obj = $(&#39;form&#39;).serializeObject();
/*obj: Object
UserId: "UserId1"
UserName: "UserName1"
__proto__: Object*/

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5. JSON2FORM

$.getJSON(&#39;url_to_file&#39;, function(data) {
for (var i in data) {
$(&#39;input[name="&#39;+i+&#39;"]&#39;).val(data[i]);
}
}

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data = {
"Name":"Emkay Entertainments",
"Address":"Nobel House, Regent Centre",
"Contact":"Phone"
} 
$(&#39;p#data&#39;).loadJSON(data);
<p id="data">
<h1 id="Name">Emkay Entertainments</h1>
<label for="Address">Address:</label>
<span id="Address">Nobel House, Regent Centre</span> 
<label for="Contact">Contact by:</label>
<span id="Contact">Phone</span>
</p>

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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