将包含文件的模型从MVC站点发送到Web Api站点 [英] Sending a model containing files from an MVC site to a Web Api site

问题描述

我有一个ASP.Net MVC网站，允许用户提交表格以及上传文件.

I have an ASP.Net MVC site that allows the user to subtmit a form along with uploading files.

这部分有效.但是在我的MVC Post方法中，我需要调用ASP.Net Web API方法并将其传递给模型.

This part works. But in my MVC Post method, I need to call an ASP.Net Web API method and pass it the model.

这是我不知道该怎么做的部分.

This is the part I don't know how to do.

这是我的MVC应用程序中的模型:

Here is my model in my MVC App:

public class MyModel
{
    public DateTime SubmittedDate { get; set; }
    public string Comments { get; set; }   
    public IEnumerable<HttpPostedFileBase> Files { get; set; }
}

在我的MVC网站中，我有以下方法:

In my MVC site I have the following method:

[HttpPost]
public async Task<ActionResult> Details(MyModel model)
{
    if (!ModelState.IsValid)
    // the rest of the method
}

使用这种方法可以正确填充文件和模型.当我放置一个断点并浏览Files属性时，我可以看到具有正确名称和文件类型的正确数量的文件.

In this method the files and model are correctly populated. When I put a breakpoint and navigate over the Files property I can see the correct number of files with the correct names and file types.

在我的Details方法中，我想在另一个站点(即Web API站点)上调用一个方法.

In my Details method, I want to call a method on another site which is a Web API site.

这是Web API网站上的方法:

Here is the method on the Web API site:

[HttpPost]
public HttpResponseMessage Foo(MyModel myModel)
{
    // do stuff
}

通常，在我的MVC方法中，我会使用PostAsJsonAsync方法使用HttpClient类来调用Web API.

Normally in my MVC method I would call the Web API using the HttpClient class using the PostAsJsonAsync method.

但是当我这样做时:

HttpResponseMessage response = await httpClient.PostAsJsonAsync(urlServiceCall, myModel);

我收到此错误:

Newtonsoft.Json.JsonSerializationException

Newtonsoft.Json.JsonSerializationException

其他信息:从"ReadTimeout"获取值时出错 "System.Web.HttpInputStream".

Additional information: Error getting value from 'ReadTimeout' on 'System.Web.HttpInputStream'.

推荐答案

这是因为它试图序列化文件的输入流.我建议为流将其作为字节数组的Web API创建一个新模型.

That is because it is trying to serialize the input stream of the files. I would suggest creating a new model for the web api that have the stream as byte arrays.

public class PostedFile {
    public int ContentLength { get; set; }
    public string ContentType { get; set; }
    public string FileName { get; set; }
    public byte[] Data { get; set; }
}

public class WebApiModel {
    public DateTime SubmittedDate { get; set; }
    public string Comments { get; set; }
    public List<PostedFile> Files { get; set; }
}

与流相比，序列化程序对数组的处理会更好.

the serializer would do better with the arrays than the stream.

这篇关于将包含文件的模型从MVC站点发送到Web Api站点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！