Azure 函数 - 如何读取表单数据

问题描述

如何在Azure函数中读取表单数据?我尝试了几种方法，但总是出现错误，例如:

How to read form data in Azure functions? I tried to do it in several ways, but always I get an error, eg.:

using System.Net;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    dynamic data = await req.Content.ReadAsFormDataAsync();

    return req.CreateResponse(HttpStatusCode.OK, $" {data}");
}

错误:执行函数时出现异常:Functions.FormTrigger.System.Net.Http.Formatting:没有 MediaTypeFormatter 可用于从媒体类型为application/json"的内容中读取FormDataCollection"类型的对象.

我检查了请求内容，我收到的请求是 multipart/form-data:

I checked request content and I'm getting request as multipart/form-data:

" ------WebKitFormBoundary47wKq7pk9Fcc4H9J
Content-Disposition: form-data; name="name"

sdgs

------WebKitFormBoundary47wKq7pk9Fcc4H9J
Content-Disposition: form-data; name=" _replyto"

sdg@sdg.com

------WebKitFormBoundary47wKq7pk9Fcc4H9J
Content-Disposition: form-data; name="message"

sdgsd

------WebKitFormBoundary47wKq7pk9Fcc4H9J--
"

感谢您的任何提示.

推荐答案

由于请求包含application/x-www-form-urlencoded"类型的内容，需要将输入转换为NameValueCollection才能读取输入:

As the request contains "application/x-www-form-urlencoded" type of contents, you need to convert the input to NameValueCollection in order to read input:

NameValueCollection col = req.Content.ReadAsFormDataAsync().Result; 
return req.CreateResponse(HttpStatusCode.OK, $" {col[0]}");

您还可以传递 Key 字符串而不是 Index，这将使代码更具可读性和不言自明

You can also pass Key string instead of Index which would make the code more readable and self-explanatory

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