是否有一种简单的单行方式来获取表单的数据，就像以经典的仅html方式提交表单一样?
例如:
<form>
<input type="radio" name="foo" value="1" checked="checked" />
<input type="radio" name="foo" value="0" />
<input name="bar" value="xxx" />
<select name="this">
<option value="hi" selected="selected">Hi</option>
<option value="ho">Ho</option>
</form>
输出:
{
"foo": "1",
"bar": "xxx",
"this": "hi"
}
像这样的东西太简单了，因为它没有(正确地)包括文本区域，选择，单选按钮和复选框:
$("#form input").each(function () {
data[theFieldName] = theFieldValue;
});
你可以使用这个函数从表单中获取一个对象或JSON。
使用它:
var object = formService.getObjectFormFields（“#idform”）;
function getObjectFormFields(formSelector)
{
/// <summary>Função que retorna objeto com base nas propriedades name dos elementos do formulário.</summary>
/// <param name="formSelector" type="String">Seletor do formulário</param>
var form = $(formSelector);
var result = {};
var arrayAuxiliar = [];
form.find(":input:text").each(function (index, element)
{
var name = $(element).attr('name');
var value = $(element).val();
result[name] = value;
});
form.find(":input[type=hidden]").each(function (index, element)
{
var name = $(element).attr('name');
var value = $(element).val();
result[name] = value;
});
form.find(":input:checked").each(function (index, element)
{
var name;
var value;
if ($(this).attr("type") == "radio")
{
name = $(element).attr('name');
value = $(element).val();
result[name] = value;
}
else if ($(this).attr("type") == "checkbox")
{
name = $(element).attr('name');
value = $(element).val();
if (result[name])
{
if (Array.isArray(result[name]))
{
result[name].push(value);
} else
{
var aux = result[name];
result[name] = [];
result[name].push(aux);
result[name].push(value);
}
} else
{
result[name] = [];
result[name].push(value);
}
}
});
form.find("select option:selected").each(function (index, element)
{
var name = $(element).parent().attr('name');
var value = $(element).val();
result[name] = value;
});
arrayAuxiliar = [];
form.find("checkbox:checked").each(function (index, element)
{
var name = $(element).attr('name');
var value = $(element).val();
result[name] = arrayAuxiliar.push(value);
});
form.find("textarea").each(function (index, element)
{
var name = $(element).attr('name');
var value = $(element).val();
result[name] = value;
});
return result;
}
我有点惊讶，因为下面没有人提到解决方案。
通过document.forms.namedItem函数获取表单数据
var form = document.forms.namedItem("fileinfo");
form.addEventListener('submit', function(ev) {
var oData = new FormData(form);
}
HT的
<form name="fileinfo">
<label>Your email address:</label>
<input type="email" autocomplete="on" autofocus name="userid" placeholder="email" required size="32" maxlength="64" /><br />
<label>Custom file label:</label>
<input type="text" name="filelabel" size="12" maxlength="32" /><br />
<label>File to stash:</label>
<input type="file" name="file" required />
<input type="submit" value="Stash the file!" />
</form>
<div></div>
对于那些更喜欢Object而不是序列化字符串的人(比如$(form).serialize()返回的字符串，以及对$(form).serializeArray()的稍微改进)，请随意使用下面的代码:
var Form = {
_form: null,
_validate: function(){
if(!this._form || this._form.tagName.toLowerCase() !== "form") return false;
if(!this._form.elements.length) return false;
return true;
}, _loopFields: function(callback){
var elements = this._form.elements;
for(var i = 0; i < elements.length; i++){
var element = form.elements[i];
if(name !== ""){
callback(this._valueOfField(element));
}
}
}, _valueOfField: function(element){
var type = element.type;
var name = element.name.trim();
var nodeName = element.nodeName.toLowerCase();
switch(nodeName){
case "input":
if(type === "radio" || type === "checkbox"){
if(element.checked){
return element.value;
}
}
return element.value;
break;
case "select":
if(type === "select-multiple"){
for(var i = 0; i < element.options.length; i++){
if(options[i].selected){
return element.value;
}
}
}
return element.value;
break;
case "button":
switch(type){
case "reset":
case "submit":
case "button":
return element.value;
break;
}
break;
}
}, serialize: function(form){
var data = {};
this._form = form;
if(this._validate()){
this._loopFields(function(value){
if(value !== null) data[name] = value;
});
}
return data;
}
};
要执行它，只需使用form .serialize(form)，函数将返回一个类似于下面的对象:
<!-- { username: "username", password: "password" } !-->
<input type="text" value="username">
<input type="password" value="password">
作为奖励，这意味着您不必为了一个序列化函数而安装整个jQuery包。
