jQuery plug-in ajaxFileUpload usage example analysis
AjaxFileUpload.js is not a very famous plug-in. It is just written by others and released for everyone to use. The principle is to create hidden forms and iframes and then use JS to submit them and get the return value.
I originally made an asynchronous upload function and chose it because its configuration method is more like jQuery’s AJAX, which I like very much.
What is said in the comments does not work. That's because we are not using the same js. I searched AjaxFileUpload on github and found a lot of similar js.
ajaxFileUpload is a jQuery plug-in for asynchronous file upload
Upload a version you don’t know, so you don’t have to look for it everywhere in the future.
Syntax: $.ajaxFileUpload([options])
options parameter description:
1, url Upload handler address.
2, fileElementId The ID of the file field that needs to be uploaded, that is, the ID of .
3, secureuri Whether to enable secure submission, the default is false.
4, dataType The data type returned by the server. Can be xml, script, json, html. If you don't fill it in, jQuery will automatically determine it.
5, success It is a processing function that is automatically executed after successful submission. The parameter data is the data returned by the server.
6, error Handling function that is automatically executed when submission fails.
7, data Custom parameters. This thing is more useful. When there is data related to the uploaded image, this thing will be used.
8, type When submitting custom parameters, this parameter must be set to post
Error message:
1. SyntaxError: missing; before statement error
If this error occurs, you need to check whether the url path is accessible
2. SyntaxError: syntax error
If this error occurs, you need to check whether there is a syntax error in the server background handler that handles the submission operation
3. SyntaxError: invalid property id error
If this error occurs, you need to check whether the text field attribute ID exists
4. SyntaxError: missing } in XML expression error
If this error occurs, you need to check whether the file name is consistent or does not exist
5. Other custom errors
You can use the variable $error to print directly to check whether each parameter is correct. It is much more convenient than the above invalid error prompts.
How to use:
Step 1: First introduce the jQuery and ajaxFileUpload plug-ins. Pay attention to the order. Needless to say, this is true for all plug-ins.
<script src="jquery-1.7.1.js" type="text/javascript"></script> <script src="ajaxfileupload.js" type="text/javascript"></script>
Step 2: HTML code:
<body> <p><input type="file" id="file1" name="file" /></p> <input type="button" value="上传" /> <p><img id="img1" alt="上传成功啦" src="" /></p> </body>
Step 3: JS code
<script src="jquery-1.7.1.js" type="text/javascript"></script> <script src="ajaxfileupload.js" type="text/javascript"></script>
Step 4: Backend page upload.aspx code:
protected void Page_Load(object sender, EventArgs e)
{
HttpFileCollection files = Request.Files;
string msg = string.Empty;
string error = string.Empty;
string imgurl;
if (files.Count > 0)
{
files[0].SaveAs(Server.MapPath("/") + System.IO.Path.GetFileName(files[0].FileName));
msg = " 成功! 文件大小为:" + files[0].ContentLength;
imgurl = "/" + files[0].FileName;
string res = "{ error:'" + error + "', msg:'" + msg + "',imgurl:'" + imgurl + "'}";
Response.Write(res);
Response.End();
}
}
Download the complete code of this example
Let’s take an example of the MVC version:
Controller code
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult Upload()
{
HttpFileCollection hfc = System.Web.HttpContext.Current.Request.Files;
string imgPath = "";
if (hfc.Count > 0)
{
imgPath = "/testUpload" + hfc[0].FileName;
string PhysicalPath = Server.MapPath(imgPath);
hfc[0].SaveAs(PhysicalPath);
}
return Content(imgPath);
}
}
Front-end view, HTML and JS code. After successful upload, return the real address of the image and bind it to < img> SRC address
<html>
<head>
<script src="/jquery-1.7.1.js" type="text/javascript"></script>
<script src="/ajaxfileupload.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$(":button").click(function () {
if ($("#file1").val().length > 0) {
ajaxFileUpload();
}
else {
alert("请选择图片");
}
})
})
function ajaxFileUpload() {
$.ajaxFileUpload
(
{
url: '/Home/Upload', //用于文件上传的服务器端请求地址
secureuri: false, //一般设置为false
fileElementId: 'file1', //文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'HTML', //返回值类型 一般设置为json
success: function (data, status) //服务器成功响应处理函数
{
alert(data);
$("#img1").attr("src", data);
if (typeof (data.error) != 'undefined') {
if (data.error != '') {
alert(data.error);
} else {
alert(data.msg);
}
}
},
error: function (data, status, e)//服务器响应失败处理函数
{
alert(e);
}
}
)
return false;
}
</script>
</head>
<body>
<p><input type="file" id="file1" name="file" /></p>
<input type="button" value="上传" />
<p><img id="img1" alt="上传成功啦" src="" /></p>
</body>
</html>
Finally, here is an example of uploading an image with parameters: Controller code:
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult Upload()
{
NameValueCollection nvc = System.Web.HttpContext.Current.Request.Form;
HttpFileCollection hfc = System.Web.HttpContext.Current.Request.Files;
string imgPath = "";
if (hfc.Count > 0)
{
imgPath = "/testUpload" + hfc[0].FileName;
string PhysicalPath = Server.MapPath(imgPath);
hfc[0].SaveAs(PhysicalPath);
}
//注意要写好后面的第二第三个参数
return Json(new { Id = nvc.Get("Id"), name = nvc.Get("name"), imgPath1 = imgPath },"text/html", JsonRequestBehavior.AllowGet);
}
}
Index view code:
<html>
<head>
<script src="/jquery-1.7.1.js" type="text/javascript"></script>
<script src="/ajaxfileupload.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
$(":button").click(function () {
if ($("#file1").val().length > 0) {
ajaxFileUpload();
}
else {
alert("请选择图片");
}
})
})
function ajaxFileUpload() {
$.ajaxFileUpload
(
{
url: '/Home/Upload', //用于文件上传的服务器端请求地址
type: 'post',
data: { Id: '123', name: 'lunis' }, //此参数非常严谨，写错一个引号都不行
secureuri: false, //一般设置为false
fileElementId: 'file1', //文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'json', //返回值类型 一般设置为json
success: function (data, status) //服务器成功响应处理函数
{
alert(data);
$("#img1").attr("src", data.imgPath1);
alert("你请求的Id是" + data.Id + " " + "你请求的名字是:" + data.name);
if (typeof (data.error) != 'undefined') {
if (data.error != '') {
alert(data.error);
} else {
alert(data.msg);
}
}
},
error: function (data, status, e)//服务器响应失败处理函数
{
alert(e);
}
}
)
return false;
}
</script>
</head>
<body>
<p><input type="file" id="file1" name="file" /></p>
<input type="button" value="上传" />
<p><img id="img1" alt="上传成功啦" src="" /></p>
</body>
</html>
showing While uploading images asynchronously, custom transmission parameters will pop up. The download address of this example
January 28, 2013. During the debugging process today, I discovered a problem, that is, as a file field (), it must have a name attribute. If there is no name attribute, after uploading The server cannot obtain the image. For example: the correct way of writing is
On January 28, 2013, the cause of the most classic error was finally found. Object function (a,b){return new e.fn.init(a,b,h)} has no method 'handleError'. This is an error reported by Google browser. It is very classic. I don’t know if it is a problem with my version or not. The real problem. The root cause of this problem was found after N uploads. The answer is: the dataType parameter must be in uppercase letters. For example: dataType: 'HTML'.
2016-07-28, an error in the comments: TypeError: $.ajaxFileUpload is not a function We are not using the same JS, you downloaded another AJAXFileUpload.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Detailed explanation of jQuery reference methods: Quick start guide
Feb 27, 2024 pm 06:45 PM
Detailed explanation of jQuery reference method: Quick start guide jQuery is a popular JavaScript library that is widely used in website development. It simplifies JavaScript programming and provides developers with rich functions and features. This article will introduce jQuery's reference method in detail and provide specific code examples to help readers get started quickly. Introducing jQuery First, we need to introduce the jQuery library into the HTML file. It can be introduced through a CDN link or downloaded
How to use PUT request method in jQuery?
Feb 28, 2024 pm 03:12 PM
How to use PUT request method in jQuery? In jQuery, the method of sending a PUT request is similar to sending other types of requests, but you need to pay attention to some details and parameter settings. PUT requests are typically used to update resources, such as updating data in a database or updating files on the server. The following is a specific code example using the PUT request method in jQuery. First, make sure you include the jQuery library file, then you can send a PUT request via: $.ajax({u
How to remove the height attribute of an element with jQuery?
Feb 28, 2024 am 08:39 AM
How to remove the height attribute of an element with jQuery? In front-end development, we often encounter the need to manipulate the height attributes of elements. Sometimes, we may need to dynamically change the height of an element, and sometimes we need to remove the height attribute of an element. This article will introduce how to use jQuery to remove the height attribute of an element and provide specific code examples. Before using jQuery to operate the height attribute, we first need to understand the height attribute in CSS. The height attribute is used to set the height of an element
jQuery Tips: Quickly modify the text of all a tags on the page
Feb 28, 2024 pm 09:06 PM
Title: jQuery Tips: Quickly modify the text of all a tags on the page In web development, we often need to modify and operate elements on the page. When using jQuery, sometimes you need to modify the text content of all a tags in the page at once, which can save time and energy. The following will introduce how to use jQuery to quickly modify the text of all a tags on the page, and give specific code examples. First, we need to introduce the jQuery library file and ensure that the following code is introduced into the page: <
Use jQuery to modify the text content of all a tags
Feb 28, 2024 pm 05:42 PM
Title: Use jQuery to modify the text content of all a tags. jQuery is a popular JavaScript library that is widely used to handle DOM operations. In web development, we often encounter the need to modify the text content of the link tag (a tag) on the page. This article will explain how to use jQuery to achieve this goal, and provide specific code examples. First, we need to introduce the jQuery library into the page. Add the following code in the HTML file:
In-depth analysis: jQuery's advantages and disadvantages
Feb 27, 2024 pm 05:18 PM
jQuery is a fast, small, feature-rich JavaScript library widely used in front-end development. Since its release in 2006, jQuery has become one of the tools of choice for many developers, but in practical applications, it also has some advantages and disadvantages. This article will deeply analyze the advantages and disadvantages of jQuery and illustrate it with specific code examples. Advantages: 1. Concise syntax jQuery's syntax design is concise and clear, which can greatly improve the readability and writing efficiency of the code. for example,
Understand the role and application scenarios of eq in jQuery
Feb 28, 2024 pm 01:15 PM
jQuery is a popular JavaScript library that is widely used to handle DOM manipulation and event handling in web pages. In jQuery, the eq() method is used to select elements at a specified index position. The specific usage and application scenarios are as follows. In jQuery, the eq() method selects the element at a specified index position. Index positions start counting from 0, i.e. the index of the first element is 0, the index of the second element is 1, and so on. The syntax of the eq() method is as follows: $("s
How to tell if a jQuery element has a specific attribute?
Feb 29, 2024 am 09:03 AM
How to tell if a jQuery element has a specific attribute? When using jQuery to operate DOM elements, you often encounter situations where you need to determine whether an element has a specific attribute. In this case, we can easily implement this function with the help of the methods provided by jQuery. The following will introduce two commonly used methods to determine whether a jQuery element has specific attributes, and attach specific code examples. Method 1: Use the attr() method and typeof operator // to determine whether the element has a specific attribute
