使用javascript将捕获的图像上传到后台服务器 [英] upload a captured image to server in background using javascript

问题描述

dialog.captureFileAsync（Windows.Media.Capture.CameraCaptureUIMode.photo）.done（

dialog.captureFileAsync(Windows.Media.Capture.CameraCaptureUIMode.photo).done(

function （file）{

function(file) {

if （file）{

if(file) {

var uploader =
new Windows.Networking.BackgroundTransfer。 BackgroundUploader（）;

varuploader = newWindows.Networking.BackgroundTransfer.BackgroundUploader();

upload = uploader.createUpload（uri，file）

upload = uploader.createUpload(uri, file)

此抛出（类型错误事件异常）。新文件是来自$的捕获图像文件句柄b $ b

This throws (Type mismatach exception). new file is capture image file handle from

}

}）;

任何想法..为什么以及如何做使用后台上传来上传相机图像，以使用JavaScript窗口8传输捕获图像或视频？

Any ideas.. why and what to do to upload a camera image using background upload to transfer a capture image or video using JavaScript windows 8?

推荐答案

captureFileAsync 返回一个StorageFile，

createUpload 需要一个应该有效的IStorageFile。我看到你的"完成"了处理程序具有"函数（文件）"。处理程序，但你传递一个名为newfile的变量到createUpload，你应该传递"文件"，而不是"新文件"，我没有看到"新文件"，在你的代码中声明
。

captureFileAsync returns a StorageFile, and createUpload requieres an IStorageFile which should work. I see that your "done" handler has a "function(file)" handler but you are passing a variable called newfile to createUpload, you should pass "file", not "newfile", I don't see "newfile" declared in your code.

dialog.captureFileAsync(Windows.Media.Capture.CameraCaptureUIMode.photo).done(

function(file) {

if(file) {

varuploader = newWindows.Networking.BackgroundTransfer.BackgroundUploader();

upload = uploader.createUpload(uri, file);
upload.startAsync().then(complete, error, progress);//use the handlers you see fit

}

});

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