Jquery：1个按钮用于选择文件和文件上传？

Question

很抱歉，如果这个问题有点令人困惑，但我不知道我怎么解释，所以请耐心等待。

基本上，我需要使用1个按钮来选择文件，一旦选择了文件，文件会自动上传而不是标准文件输入+提交按钮，如果这有意义的话？

所以通常的标准文件上传是这样的：

<form id="form" action="ajaxupload.php" method="post" enctype="multipart/form-data">


<input id="uploadImage" type="file" accept="image/*" name="image" />

<input id="button" type="submit" value="Upload">

</form>

有什么方法可以让我们有这样的东西：

 <form id="form" action="ajaxupload.php" method="post" enctype="multipart/form-data">
<input id="uploadImage" type="file" accept="image/*" name="image" />
  </form>

一旦从单击选择文件（文件输入）后打开的对话框中选择文件，文件就会上传？

我已经在许多网站上看到过这种情况，我只是想知道他们是如何做到的。

任何帮助都将不胜感激。

Answer 1

以下代码可以帮助您解决问题

$("document").ready(function() {

  $("#uploadImage").change(function() {
    $('#form').submit();
  });


});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form id="form" action="ajaxupload.php" method="post" enctype="multipart/form-data">
  <input id="uploadImage" type="file" accept="image/*" name="image" />

</form>

Answer 2

通过预览执行此操作的最佳方式：

<input type='file' />
<img id="myImg" src="#" alt="your image" />

$("#myImg").hide();
$(function () {
  $(":file").change(function () {
    if (this.files && this.files[0]) {
        var reader = new FileReader();
        reader.onload = imageIsLoaded;
        reader.readAsDataURL(this.files[0]);
      }
    });
 });

  function imageIsLoaded(e) {
  $("#myImg").show();
  $('#myImg').attr('src', e.target.result);
};

Codepen：http://codepen.io/anon/pen/aNqPbb

Answer 3

您可以使用此库Dropzone.js 点击下面的链接
http://www.dropzonejs.com/

Answer 4

在文件输入中添加javascript更改事件。在更改功能内部执行文件上传

还将#uploadImage的css设置为隐藏

即。 #uploadimage{display:"none"}

例如在jquery中

$( "#fileinput" ).change(function() {
 //do the fileupload here
});

希望这有帮助。

Answer 5

如果您使用的是Bootstrap，则可以使用 Bootstrap Filestyle plugin 创建漂亮的单按钮文件输入。

这是您可以创建的众多效果之一：

＆＃13;

＆＃13;

$(document).ready(function(){

// <script type="text/javascript" src="js/bootstrap-filestyle.min.js"> </script>  include this file..


(function($){var nextId=0;var Filestyle=function(element,options){this.options=options;this.$elementFilestyle=[];this.$element=$(element)};Filestyle.prototype={clear:function(){this.$element.val("");this.$elementFilestyle.find(":text").val("");this.$elementFilestyle.find(".badge").remove()},destroy:function(){this.$element.removeAttr("style").removeData("filestyle");this.$elementFilestyle.remove()},disabled:function(value){if(value===true){if(!this.options.disabled){this.$element.attr("disabled","true");this.$elementFilestyle.find("label").attr("disabled","true");this.options.disabled=true}}else{if(value===false){if(this.options.disabled){this.$element.removeAttr("disabled");this.$elementFilestyle.find("label").removeAttr("disabled");this.options.disabled=false}}else{return this.options.disabled}}},buttonBefore:function(value){if(value===true){if(!this.options.buttonBefore){this.options.buttonBefore=true;if(this.options.input){this.$elementFilestyle.remove();this.constructor();this.pushNameFiles()}}}else{if(value===false){if(this.options.buttonBefore){this.options.buttonBefore=false;if(this.options.input){this.$elementFilestyle.remove();this.constructor();this.pushNameFiles()}}}else{return this.options.buttonBefore}}},icon:function(value){if(value===true){if(!this.options.icon){this.options.icon=true;this.$elementFilestyle.find("label").prepend(this.htmlIcon())}}else{if(value===false){if(this.options.icon){this.options.icon=false;this.$elementFilestyle.find(".icon-span-filestyle").remove()}}else{return this.options.icon}}},input:function(value){if(value===true){if(!this.options.input){this.options.input=true;if(this.options.buttonBefore){this.$elementFilestyle.append(this.htmlInput())}else{this.$elementFilestyle.prepend(this.htmlInput())}this.$elementFilestyle.find(".badge").remove();this.pushNameFiles();this.$elementFilestyle.find(".group-span-filestyle").addClass("input-group-btn")}}else{if(value===false){if(this.options.input){this.options.input=false;this.$elementFilestyle.find(":text").remove();var files=this.pushNameFiles();if(files.length>0&&this.options.badge){this.$elementFilestyle.find("label").append(' <span class="badge">'+files.length+"</span>")}this.$elementFilestyle.find(".group-span-filestyle").removeClass("input-group-btn")}}else{return this.options.input}}},size:function(value){if(value!==undefined){var btn=this.$elementFilestyle.find("label"),input=this.$elementFilestyle.find("input");btn.removeClass("btn-lg btn-sm");input.removeClass("input-lg input-sm");if(value!="nr"){btn.addClass("btn-"+value);input.addClass("input-"+value)}}else{return this.options.size}},placeholder:function(value){if(value!==undefined){this.options.placeholder=value;this.$elementFilestyle.find("input").attr("placeholder",value)}else{return this.options.placeholder}},buttonText:function(value){if(value!==undefined){this.options.buttonText=value;this.$elementFilestyle.find("label .buttonText").html(this.options.buttonText)}else{return this.options.buttonText}},buttonName:function(value){if(value!==undefined){this.options.buttonName=value;this.$elementFilestyle.find("label").attr({"class":"btn "+this.options.buttonName})}else{return this.options.buttonName}},iconName:function(value){if(value!==undefined){this.$elementFilestyle.find(".icon-span-filestyle").attr({"class":"icon-span-filestyle "+this.options.iconName})}else{return this.options.iconName}},htmlIcon:function(){if(this.options.icon){return'<span class="icon-span-filestyle '+this.options.iconName+'"></span> '}else{return""}},htmlInput:function(){if(this.options.input){return'<input type="text" class="form-control '+(this.options.size=="nr"?"":"input-"+this.options.size)+'" placeholder="'+this.options.placeholder+'" disabled> '}else{return""}},pushNameFiles:function(){var content="",files=[];if(this.$element[0].files===undefined){files[0]={name:this.$element[0]&&this.$element[0].value}}else{files=this.$element[0].files}for(var i=0;i<files.length;i++){content+=files[i].name.split("\\").pop()+", "}if(content!==""){this.$elementFilestyle.find(":text").val(content.replace(/\, $/g,""))}else{this.$elementFilestyle.find(":text").val("")}return files},constructor:function(){var _self=this,html="",id=_self.$element.attr("id"),files=[],btn="",$label;if(id===""||!id){id="filestyle-"+nextId;_self.$element.attr({id:id});nextId++}btn='<span class="group-span-filestyle '+(_self.options.input?"input-group-btn":"")+'"><label for="'+id+'" class="btn '+_self.options.buttonName+" "+(_self.options.size=="nr"?"":"btn-"+_self.options.size)+'" '+(_self.options.disabled?'disabled="true"':"")+">"+_self.htmlIcon()+'<span class="buttonText">'+_self.options.buttonText+"</span></label></span>";html=_self.options.buttonBefore?btn+_self.htmlInput():_self.htmlInput()+btn;_self.$elementFilestyle=$('<div class="bootstrap-filestyle input-group">'+html+"</div>");_self.$elementFilestyle.find(".group-span-filestyle").attr("tabindex","0").keypress(function(e){if(e.keyCode===13||e.charCode===32){_self.$elementFilestyle.find("label").click();return false}});_self.$element.css({position:"absolute",clip:"rect(0px 0px 0px 0px)"}).attr("tabindex","-1").after(_self.$elementFilestyle);if(_self.options.disabled){_self.$element.attr("disabled","true")}_self.$element.change(function(){var files=_self.pushNameFiles();if(_self.options.input==false&&_self.options.badge){if(_self.$elementFilestyle.find(".badge").length==0){_self.$elementFilestyle.find("label").append(' <span class="badge">'+files.length+"</span>")}else{if(files.length==0){_self.$elementFilestyle.find(".badge").remove()}else{_self.$elementFilestyle.find(".badge").html(files.length)}}}else{_self.$elementFilestyle.find(".badge").remove()}});if(window.navigator.userAgent.search(/firefox/i)>-1){_self.$elementFilestyle.find("label").click(function(){_self.$element.click();return false})}}};var old=$.fn.filestyle;$.fn.filestyle=function(option,value){var get="",element=this.each(function(){if($(this).attr("type")==="file"){var $this=$(this),data=$this.data("filestyle"),options=$.extend({},$.fn.filestyle.defaults,option,typeof option==="object"&&option);if(!data){$this.data("filestyle",(data=new Filestyle(this,options)));data.constructor()}if(typeof option==="string"){get=data[option](value)}}});if(typeof get!==undefined){return get}else{return element}};$.fn.filestyle.defaults={buttonText:"Choose file",iconName:"glyphicon glyphicon-folder-open",buttonName:"btn-default",size:"nr",input:true,badge:true,icon:true,buttonBefore:false,disabled:false,placeholder:""};$.fn.filestyle.noConflict=function(){$.fn.filestyle=old;return this};$(function(){$(".filestyle").each(function(){var $this=$(this),options={input:$this.attr("data-input")==="false"?false:true,icon:$this.attr("data-icon")==="false"?false:true,buttonBefore:$this.attr("data-buttonBefore")==="true"?true:false,disabled:$this.attr("data-disabled")==="true"?true:false,size:$this.attr("data-size"),buttonText:$this.attr("data-buttonText"),buttonName:$this.attr("data-buttonName"),iconName:$this.attr("data-iconName"),badge:$this.attr("data-badge")==="false"?false:true,placeholder:$this.attr("data-placeholder")};$this.filestyle(options)})})})(window.jQuery);


$(":file").filestyle({input: false});
})

＆＃13;

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>

<input type="file" class="filestyle" data-input="false" data-buttonName="btn-info btn-xs" />

＆＃13;

＆＃13;

＆＃13;