发布图片时，HttpContext.Current.Request是null。
有没有简单的方法来实现这一目标？我在客户端使用dropzone.js。
Project是Angular，带有Web API（ASP.NET Core 2.0）模板。
[HttpPost]
public HttpResponseMessage UploadJsonFile()
{
HttpResponseMessage response = new HttpResponseMessage();
var httpRequest = HttpContext.Current.Request;
if (httpRequest.Files.Count > 0)
{
foreach (string file in httpRequest.Files)
{
var postedFile = httpRequest.Files[file];
var filePath = HttpContext.Current.Server.MapPath("~/UploadFile/" + postedFile.FileName);
postedFile.SaveAs(filePath);
}
}
return response;
}
这是我做过的代码工作正常。
public void PostFile(IFormFile file)
{
var uploads = Path.Combine(_hostingEnvironment.WebRootPath, "uploads");
if (file.Length > 0)
{
var filePath = Path.Combine(uploads, file.FileName);
using (var fileStream = new FileStream(filePath, FileMode.Create))
{
file.CopyToAsync(fileStream);
}
}
}
首先，我们需要使用IOperationFilter在Swagger中启用文件上载。创建一个继承自IOperationFilter的类。有关详细信息，请阅读this article
public class FormFileSwaggerFilter: IOperationFilter
{
private const string formDataMimeType = "multipart/form-data";
private static readonly string[] formFilePropertyNames =
typeof(IFormFile).GetTypeInfo().DeclaredProperties.Select(p => p.Name).ToArray();
public void Apply(Operation operation, OperationFilterContext context)
{
var parameters = operation.Parameters;
if (parameters == null || parameters.Count == 0) return;
var formFileParameterNames = new List<string>();
var formFileSubParameterNames = new List<string>();
foreach (var actionParameter in context.ApiDescription.ActionDescriptor.Parameters)
{
var properties =
actionParameter.ParameterType.GetProperties()
.Where(p => p.PropertyType == typeof(IFormFile))
.Select(p => p.Name)
.ToArray();
if (properties.Length != 0)
{
formFileParameterNames.AddRange(properties);
formFileSubParameterNames.AddRange(properties);
continue;
}
if (actionParameter.ParameterType != typeof(IFormFile)) continue;
formFileParameterNames.Add(actionParameter.Name);
}
if (!formFileParameterNames.Any()) return;
var consumes = operation.Consumes;
consumes.Clear();
consumes.Add(formDataMimeType);
foreach (var parameter in parameters.ToArray())
{
if (!(parameter is NonBodyParameter) || parameter.In != "formData") continue;
if (formFileSubParameterNames.Any(p => parameter.Name.StartsWith(p + "."))
|| formFilePropertyNames.Contains(parameter.Name))
parameters.Remove(parameter);
}
foreach (var formFileParameter in formFileParameterNames)
{
parameters.Add(new NonBodyParameter()
{
Name = formFileParameter,
Type = "file",
In = "formData"
});
}
}
}
然后在Startup.cs中注册此课程
services.AddSwaggerGen(options =>
{
// Swagger Configuration
// Register File Upload Operation Filter
options.OperationFilter<FormFileSwaggerFilter>();
});
现在在Service文件中定义如下方法，
public class ExampleAppService : // Inherit from required class/interface
{
public RETURN_TYPE UploadFile([FromForm]IFormFile file)
{
// Save file here
}
}
***不要忘记在方法参数中使用[FromForm]来上传文件，否则你会在swagger ui中获得六个参数。
现在，使用NSwag生成角度的服务文件将需要FileParameter类型的参数。现在在组件中，
methodName = (file): void => {
// file is the selected file
this._service
.uploadDocument({ data: file, fileName: file.name } as FileParameter)
.subscribe((res) => {
// Handle Response
});
};
您无法使用应用服务上传图片。
您可以从AbpController派生控制器。