我可以使用以下jQuery代码使用ajax请求的POST方法执行文件上载吗？
$.ajax({
type: "POST",
timeout: 50000,
url: url,
data: dataString,
success: function (data) {
alert('success');
return false;
}
});
如果可能，我需要填写数据部分吗？这是正确的方式吗？我只将文件POST到服务器端。
我一直在搜索，但我发现的是一个插件，而在我的计划中，我不想使用它。至少目前是这样。
当前回答
这是我的代码
var formData = new FormData();
var files = $('input[type=file]');
for (var i = 0; i < files.length; i++) {
if (files[i].value == "" || files[i].value == null) {
return false;
}
else {
formData.append(files[i].name, files[i].files[0]);
}
}
var formSerializeArray = $("#Form").serializeArray();
for (var i = 0; i < formSerializeArray.length; i++) {
formData.append(formSerializeArray[i].name, formSerializeArray[i].value)
}
$.ajax({
type: 'POST',
data: formData,
contentType: false,
processData: false,
cache: false,
url: '/Controller/Action',
success: function (response) {
if (response.Success == true) {
return true;
}
else {
return false;
}
},
error: function () {
return false;
},
failure: function () {
return false;
}
});
其他回答
2019年更新：
html
<form class="fr" method='POST' enctype="multipart/form-data"> {% csrf_token %}
<textarea name='text'>
<input name='example_image'>
<button type="submit">
</form>
js
$(document).on('submit', '.fr', function(){
$.ajax({
type: 'post',
url: url, <--- you insert proper URL path to call your views.py function here.
enctype: 'multipart/form-data',
processData: false,
contentType: false,
data: new FormData(this) ,
success: function(data) {
console.log(data);
}
});
return false;
});
视图.py
form = ThisForm(request.POST, request.FILES)
if form.is_valid():
text = form.cleaned_data.get("text")
example_image = request.FILES['example_image']
<html>
<head>
<title>Ajax file upload</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script>
$(document).ready(function (e) {
$("#uploadimage").on('submit', (function(e) {
e.preventDefault();
$.ajax({
url: "upload.php", // Url to which the request is send
type: "POST", // Type of request to be send, called as method
data: new FormData(this), // Data sent to server, a set of key/value pairs (i.e. form fields and values)
contentType: false, // The content type used when sending data to the server.
cache: false, // To unable request pages to be cached
processData:false, // To send DOMDocument or non processed data file it is set to false
success: function(data) // A function to be called if request succeeds
{
alert(data);
}
});
}));
</script>
</head>
<body>
<div class="main">
<h1>Ajax Image Upload</h1><br/>
<hr>
<form id="uploadimage" action="" method="post" enctype="multipart/form-data">
<div id="image_preview"><img id="previewing" src="noimage.png" /></div>
<hr id="line">
<div id="selectImage">
<label>Select Your Image</label><br/>
<input type="file" name="file" id="file" required />
<input type="submit" value="Upload" class="submit" />
</div>
</form>
</div>
</body>
</html>
<input class="form-control cu-b-border" type="file" id="formFile">
<img id="myImg" src="#">
在js中
<script>
var formData = new FormData();
formData.append('file', $('#formFile')[0].files[0]);
$.ajax({
type: "POST",
url: '/GetData/UploadImage',
data: formData,
processData: false, // tell jQuery not to process the data
contentType: false, // tell jQuery not to set contentType
success: function (data) {
console.log(data);
$('#myImg').attr('src', data);
},
error: function (xhr, ajaxOptions, thrownError) {
}
})
</script>
在控制器中
public ActionResult UploadImage(HttpPostedFileBase file)
{
string filePath = "";
if (file != null)
{
string path = "/uploads/Temp/";
if (!Directory.Exists(Server.MapPath("~" + path)))
{
Directory.CreateDirectory(Server.MapPath("~" + path));
}
filePath = FileUpload.SaveUploadedFile(file, path);
}
return Json(filePath, JsonRequestBehavior.AllowGet);
}
可以，只需使用javascript获取文件，确保将文件作为数据URL读取。解析出base64之前的内容，以实际获得base64编码的数据，然后如果您使用php或任何后端语言，您可以解码base64数据并保存到如下所示的文件中
Javascript:
var reader = new FileReader();
reader.onloadend = function ()
{
dataToBeSent = reader.result.split("base64,")[1];
$.post(url, {data:dataToBeSent});
}
reader.readAsDataURL(this.files[0]);
PHP:
file_put_contents('my.pdf', base64_decode($_POST["data"]));
当然，你可能会想做一些验证，比如检查你正在处理的文件类型之类的事情，但这是一个想法。
使用隐藏的iframe并将表单的目标设置为该iframe的名称。这样，当提交表单时，只会刷新iframe。为iframe的加载事件注册一个事件处理程序，以解析响应。
