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。
<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>
如许多答案所示,使用FormData是一种方法。这里有一些代码非常适合这个目的。我也同意嵌套ajax块以完成复杂环境的意见。通过包括e.PreventDefault();根据我的经验,使代码更易于跨浏览器兼容。
$('#UploadB1').click(function(e){
e.preventDefault();
if (!fileupload.valid()) {
return false;
}
var myformData = new FormData();
myformData.append('file', $('#uploadFile')[0].files[0]);
$("#UpdateMessage5").html("Uploading file ....");
$("#UpdateMessage5").css("background","url(../include/images/loaderIcon.gif) no-repeat right");
myformData.append('mode', 'fileUpload');
myformData.append('myid', $('#myid').val());
myformData.append('type', $('#fileType').val());
//formData.append('myfile', file, file.name);
$.ajax({
url: 'include/fetch.php',
method: 'post',
processData: false,
contentType: false,
cache: false,
data: myformData,
enctype: 'multipart/form-data',
success: function(response){
$("#UpdateMessage5").html(response); //.delay(2000).hide(1);
$("#UpdateMessage5").css("background","");
console.log("file successfully submitted");
},error: function(){
console.log("not okay");
}
});
});
我想到了一个主意:
Have an iframe on page and have a referencer.
具有将输入类型文件元素移动到的表单。
Form: A processing page AND a target of the FRAME.
结果将发布到iframe,然后您只需将获取的数据发送到所需的图像标签,如下所示:
data:image/png;base64,asdfasdfasdfasdfa
并加载页面。
我相信这对我来说是有效的,取决于你是否能够做到:
.aftersubmit(function(){
stopPropagation(); // or some other code which would prevent a refresh.
});
<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);
}