Asp.Net Core WebAPI 中的 IFormFile 始终为空 [英] IFormFile is always empty in Asp.Net Core WebAPI
问题描述
当我尝试使用 angularjs 控制器推送数据时,我遇到了问题.但是我所做的(IFormFile 文件)总是空的.只有一些使用 razor 语法的示例,但没有如何使用 angular 或 jquery 的示例.
I have a problem here when I am trying to push data with angularjs controller. But what ever I do (IFormFile file) is always empty. There are only some examples with razor syntax but no examples how to do it with angular or jquery.
HTML:
<form class="form-body" enctype="multipart/form-data" name="newFileForm" ng-submit="vm.addFile()"><input type="file" id="file1" name="file" multiple ng-files="getTheFiles($files)"/></form>
指令:
(function() {
'use strict';
angular
.module('app')
.directive('ngFiles', ['$parse', function ($parse) {
function fn_link(scope, element, attrs) {
var onChange = $parse(attrs.ngFiles);
element.on('change', function (event) {
onChange(scope, { $files: event.target.files });
});
};
return {
link: fn_link
};
}]);
})();
控制器
var formdata = new FormData();
$scope.getTheFiles = function ($files) {
angular.forEach($files, function (key, value) {
formdata.append(key, value);
});
};
vm.addFile = function () {
var xhr = new XMLHttpRequest();
xhr.open('POST', url, true);
xhr.setRequestHeader("Content-Type", "undefined");
xhr.send(formdata);
}
Asp.net 核心 webapi:
Asp.net core webapi:
[HttpPost]
public async Task<IActionResult> PostProductProjectFile(IFormFile file)
{
if (!ModelState.IsValid)
{
return BadRequest(ModelState);
}
....
return ...;
}
我也尝试过使用 formdata 来实现,因为它是在您使用 razor 语法发布时构建的.像这样:
I have also tried to do it with formdata, as it is constructed when you post it with razor syntax. Something like this:
dataService.addFile(formdata, {
contentDisposition: "form-data; name=\"files\"; filename=\"C:\\Users\\UserName\\Desktop\\snip_20160420091420.png\"",
contentType: "multipart/form-data",
headers: {
"Content-Disposition": "form-data; name=\"files\"; filename=\"C:\\Users\\UserName\\Desktop\\snip_20160420091420.png\"",
'Content-Type': "image/png"
},
fileName: "C:\\Users\\UserName\\Desktop\\snip_20160420091420.png",
name: "files",
length : 3563
}
也代替 formData 提供原始文件,正如我在评论中所写的那样.但仍然没有任何反应
Also instead of formData to provide raw file as I wrote in comment. But still nothing happens
推荐答案
这是使用 angularjs 的方法:
This is how to do it with angularjs:
vm.addFile = function () {
var fileUpload = $("#file").get(0);
var files = fileUpload.files;
var data = new FormData();
for (var i = 0; i < files.length ; i++) {
data.append(files[i].name, files[i]);
}
$http.post("/api/Files/", data, {
headers: { 'Content-Type': undefined },
transformRequest: angular.identity
}).success(function (data, status, headers, config) {
}).error(function (data, status, headers, config) {
});
}
在网络 API 中:
[HttpPost]
public async Task<IActionResult> PostFile()
{
//Read all files from angularjs FormData post request
var files = Request.Form.Files;
var strigValue = Request.Form.Keys;
.....
}
或者像这样:
[HttpPost]
public async Task<IActionResult> PostFiles(IFormCollection collection)
{
var f = collection.Files;
foreach (var file in f)
{
//....
}
}
这篇关于Asp.Net Core WebAPI 中的 IFormFile 始终为空的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!