joh*_*dle 5 c# jquery asp.net-core-mvc
检查下面的jquery代码。在这里,我从 html 中抓取文件,然后通过 ajax 调用将其发布到我的 Controller Post 方法。从 Controller post 方法中,我成功地接收到该文件,files如您所见。但我的问题是我如何发送另外两个被调用的文本参数 -type并且id从这个 ajax 调用然后我怎样才能从带有该文件的控制器中获取该值?基本上我也必须用那些文本值来获取那个文件。这怎么可能?ajax 和控制器需要什么改变?
网址:
<div class="col-sm-3" style="float:left;">
<label class="btn btn-outline-dark btn-block">
Browse...
<span id="uploaded-file-name" style="font-style: italic"></span>
<input id="file-upload" type="file" name="file"
onchange="$('#uploaded-file-name').text($('#file-upload')[0].value);" hidden>
</label>
</div>
<div class="col-sm-2" style="float:left;">
<button class="btn btn-dark" id="start_upload">Start Upload</button>
</div>
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jQuery ajax:
//file upload
$("#start_upload").click(function (evt) {
var fileUpload = $("#file-upload").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]);
}
$.ajax({
type: "POST",
url: "/Products/UploadFiles",
contentType: false,
processData: false,
data: data,
success: function (message) {
alert(message);
},
error: function () {
alert("There was error uploading files!");
}
});
});
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MVC .net 核心控制器:
[HttpPost]
public IActionResult UploadFiles()
{
//file upload process
var files = Request.Form.Files;
string type = "";
int id = ;
}
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您可以将其他输入字段值添加到 FormData 对象。
我将首先创建一个用于接受 ajax 负载的视图模型
public class UploadVm
{
public string Type { set; get; }
public string Id { set; get; }
public HttpPostedFileBase File { set; get; }
}
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现在,在您的视图中,再添加 2 个输入元素以从用户读取此值
<input id="id" type="text" />
<input id="type" type="text" />
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现在在您的 ajax 调用代码中,向FormData对象添加另外 2 个项目。
$("#start_upload").click(function (evt) {
var fileUpload = $("#file-upload").get(0);
var files = fileUpload.files;
var data = new FormData();
for (var i = 0; i < files.length; i++) {
data.append("File", files[i]);
}
//Add the input element values
data.append("Type", $("#type").val());
data.append("Id", $("#id").val());
$.ajax({
type: "POST",
url: "/Products/UploadFiles",
contentType: false,
processData: false,
data: data,
success: function (message) {
console.log(message);
},
error: function () {
alert("There was error uploading files!");
}
});
});
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现在在您的服务器端,您可以使用我们的新视图模型作为 action 方法的参数。当进行 ajax 调用时,模型绑定器将能够映射从请求接收到的数据并将其映射到我们的UploadVm视图模型对象的属性。
[HttpPost]
public ActionResult UploadFiles(UploadVm model)
{
// to do : read values of model and use it
// to do : return something
}
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我在这里所做的是,只需将带有值的键FormData()从 jquery 插入到此 obj 中,然后您就可以从控制器中获取它。如果您想了解更多信息,FormData()请阅读此处
将你的 jquery 更改为这样-
//file upload
$("#start_upload").click(function (evt) {
var fileUpload = $("#file-upload").get(0);
var files = fileUpload.files;
var data = new FormData();
data.append('type', 'your_type');
data.append('id', '1');
for (var i = 0; i < files.length; i++) {
data.append(files[i].name, files[i]);
}
$.ajax({
type: "POST",
url: "/Products/UploadFiles",
contentType: false,
processData: false,
data: data,
success: function (message) {
alert(message);
},
error: function () {
alert("There was error uploading files!");
}
});
});
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然后通过控制器中的键获取这些值:
[HttpPost]
public IActionResult UploadFiles()
{
//file upload process
var files = Request.Form.Files;
string type = Request.Form.Where(x => x.Key == "type").FirstOrDefault().Value;
string id = Request.Form.Where(x => x.Key == "id").FirstOrDefault().Value;
}
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