tobase64string

问题 i want pass base 64 string image to server site then convert to image in c# function readFile(input) { CheckFileUpload(input.files.length) if (input.files && input.files[0]) { var img, inputID = 0; for (var i = 0; i < input.files.length; i++) { var reader = new FileReader(); reader.onload = (function (f) { return function (e) { //<input type="file" id="file_' + inputID + '" name="file_' + inputID + '" class="d-none" value="' + f + '" style="display:none" />'; var fileInput = $('<input/>')

问题 i want pass base 64 string image to server site then convert to image in c# function readFile(input) { CheckFileUpload(input.files.length) if (input.files && input.files[0]) { var img, inputID = 0; for (var i = 0; i < input.files.length; i++) { var reader = new FileReader(); reader.onload = (function (f) { return function (e) { //<input type="file" id="file_' + inputID + '" name="file_' + inputID + '" class="d-none" value="' + f + '" style="display:none" />'; var fileInput = $('<input/>')

问题 This question already has an answer here : Decode base64_encode Image from JSON in Swift (1 answer) Closed 3 days ago . I have this code to convert UIImage to base64EncodedString and from base64EncodedString back to UIImage on both iOS and Android app. The problem is when i convert UIImage to base64EncodedString and send to my android device it works, also when i receive base64EncodedString from android device to IOS this function imageFromBase64 will decode it to UIImage without issue. But

问题 I have 3 questions about base64: 1) The base64 encoding purpose is binary-to-text. Isn't text going to be sent through web as binary? Then what is good for? 2) In past they used 7-bit communication systems, now it's 8-bit. Then why we still using it now? 3) How it increases the size? I just take 3-bytes with 28-bit and rearrange them to 4-bytes of 6-bit but in total they still 28-bit? 回答1: 1) The purpose is not only binary to text encoding, but also to encode text which uses specific

问题 I am using Python and I have a base64 string. I want to know that if the base64 data I have received is a image and not any other file (eg. PDF, DOCX) whose extension is changed to image extension. Example: string1 = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAARwAAAD2CAYAAAAEXDiwAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAAhdEVYdENyZWF0aW9uIFRpbWUAMjAyMDowMToyMyAxODowNjo1NkXosZcAADekSURBVHhe7Z0HuF5VlbDXDSUI0hOQIAqY0EWwjBLEwRFGKXYEQUT8FZixAjP4

来源： https://stackoverflow.com/questions/54804415/convert-image-data-type-into-base64-and-base64-into-image-data-type

来源： https://stackoverflow.com/questions/54804415/convert-image-data-type-into-base64-and-base64-into-image-data-type

问题 i'm trying to post encoded string of image to retrofit post method...after debugging i got very long string on debug of image chosen from gallery.....after submitting i can see long string encoded of image in debugger....in postman when i check i shows profile_pic: " " that is null ... need help if i used endpoint like this im not getting crash: @FormUrlEncoded @POST("update") fun useredit( @Header("access_token") token: String, @Field("first_name") first_name:String, @Field("last_name") last

问题 TL;DR; Images converted to base64string have huge RAM footprint in large object heap. I have some code in a windows service that consumes our product images uploaded by users, standardizes them into a web-grade format (they will upload 10MB bitmaps), and does some other things like resize them into a square and add whitespace padding. It then converts them to a base64 string to upload them into our hosting environment via rest. The environment requires it be done this way, i cannot use URLS.

问题 This question already has an answer here : How to convert a image into Base64 string without compressing the image? (1 answer) Closed 8 months ago . I am trying to convert a bitmap image into base64 String using this code. I and getting a very low-quality image. How can I get a good quality image after convert bitmap into Base64 Sring public String BitMapToString(Bitmap bitmap) { ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);