form-data | 易学教程

Why are HTML forms sometimes cleared when clicking on the browser back button

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问题 I am sure everybody knows that behaviour. You fill in a form on the web, and you submit it. After the submission you recognize that you filled in some wrong data. So, you click on the browsers back button. Then, sometimes the form still have the data you entered (what you are hoping in this situation) and sometimes not. I couldn't find any connection when it is cleared and when not. Some answers i found on the internet / stackoverflow: on https connections, forms are always cleared when using

How to get a key/value data set from a HTML form

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I'm simply looking for a way to get all the values from a <form> . I searched the Web for a while, stumbling across FormData , which seems quite what I'm looking for. However its API is not available on any browser, so I need an alternative. What I need in my specific case is an object of key/value pairs. For example: <form> <input type="text" name="firstname" value="John" /> <input type="text" name="surname" value="doe" /> <input type="email" name="email" value="" /> <input type="radio" name="gender" value="male" /> <input type="radio" name="gender" value="female" /> </form> The object should

How to add header data in XMLHttpRequest when using formdata?

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问题 I'm trying to implement a file upload API, given here : Mediafire file Upload I am successfully able to upload the Post data & Get data , but have no clue how to send the x-filename attribute, which is meant to be Header data as given in API guide. My Code : xmlhttp=new XMLHttpRequest(); var formData = new FormData(); formData.append("Filedata", document.getElementById("myFile").files[0]); var photoId = getCookie("user"); // formData.append("x-filename", photoId); //tried this but doesn't

AngularJS Formdata file array upload

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I'm trying to upload (actually POST) numerous small files in one go along with some key, value pairs: $scope.uploadFiles = function(files) { if (files.length === 0) { return; } var formData = new FormData(); formData.append('keyName1', 'keyValue1'); formData.append('keyName2', 'keyValue2'); formData.append('keyName3', 'keyValue3'); for (var i = 0; i < files.length; i++) { formData.append('files[]', files[i]); } $http.post( '/myEndpoint', formData, { headers: { 'Content-Type': undefined }, transformRequest: angular.identity }).success(function (result) { console.log('YAY'); }).error(function ()

parsing a formdata object with javascript

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问题 My company uses a propitiatory application server in which the server side programs are written in javascript (not node.js) . This is a very initial thing and support isn't that good Now here is my problem : I am having to process an uploaded csv on the server side .. I am using the super answer at How can I upload files asynchronously? (passing the formdata object with jquery) and i am able to access the sent file on the server side . But how do i parse it out ? It looks like this -----

How to append multiple file inputs to a FormData object using $.each?

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I have a multiple (and dynamic) number of inputs of type=file . I want to create a FormData object out of them. I need to manually append them to the object as I need access to their filenames for inserting into a database and therefore need to specify a filename is this format: myFormData.append(name,file,filename); HTML <form id="my_form" enctype="multipart/form-data"> <input type="file" name="undefined" id="file_1" data-filename="image.jpg"> <input type="file" name="undefined" id="file_2" data-filename="image2.jpg"> <button>click</button> </form> jQuery var myFormData = new FormData(); $

How to send form data in POST request in Swift 3

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问题 I am trying to post form-data using webservice, userName & password, but in response it's showing an error stating "Could not connect to the server.". Please help me to send form data in the POST request. let dict:[String:String] = ["userName": userName as! String, "password": password as! String] do { let jsonData = try JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted) let url = URL(string: "(some url)")! var request = URLRequest(url: url) request.httpMethod = "POST"

Send FormData object AND an additional parameter via ajax

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I have managed to send a FormData object like so: var formData = new FormData(); formData.append('file', this.files[0]); $.ajax({ url: urlUploadProductsFile, type: 'POST', data: formData, cache: false, contentType: false, processData: false }, 'json'); Now what I want to do is add an additional CustomerId to send to the server. The following won't work: var formData = new FormData(); formData.append('file', this.files[0]); $.ajax({ url: urlUploadProductsFile, type: 'POST', data: { "file": formData, "CustomerId": 2 }, cache: false, contentType: false, processData: false }, 'json'); And I also

Accessing FormData Values

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I have a FormData object which I create in javascript from an HTML form like so. The FormData object doesn't seem very well documented (it may just be me searching the wrong things!). var form = new FormData(document.getElementById("form")); My Question How do I access the different input values of this FormData object before I send it off? Eg. form.name accesses the value that was entered into the input with the name form.name . It seems you can't get values of the form element using FormData . The FormData object lets you compile a set of key/value pairs to send using XMLHttpRequest. Its

FormData append item in array

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public List<Region> Regions { get; set; } in model called News.An Region Model is public class Region { public int Id { get; set; } public string Name { get; set; } public static Region Parse(DataRow row) { return new Region { Id = Database.GetInteger(row["Id"]), Name = Database.GetString(row["Region"]), }; } } in Javascript I am using AJAX post method with formdata. I want to set this region. var regionList = []; if (selected === "region") { if (region.length <= 0) { toastr.warning('Lütfen en az bir bölge seçin !!!'); return; } for (var i = 0; i < region.length; i++) { var item = { Id: region