Azure功能 - 如何读取表单数据

Question

如何阅读 Azure功能中的表单数据？我试图以多种方式做到这一点，但我总是得到一个错误，例如：

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：Exception while executing function: Functions.FormTrigger. System.Net.Http.Formatting: No MediaTypeFormatter is available to read an object of type 'FormDataCollection' from content with media type 'application/json'.

我检查了请求内容，并且我收到了multipart/form-data的请求：

" ------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\"name\"\r\n\r\nsdgs\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\" _replyto\"\r\n\r\nsdg@sdg.com\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J\r\nContent-Disposition: form-data; name=\"message\"\r\n\r\nsdgsd\r\n
------WebKitFormBoundary47wKq7pk9Fcc4H9J--\r\n"

感谢您的任何提示。

Answer 1

由于请求包含＆＃34; application / x-www-form-urlencoded＆＃34;内容类型，您需要将输入转换为NameValueCollection以读取输入：

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

您还可以传递密钥字符串而不是索引，这将使代码更具可读性和不言自明

Answer 2

为了读取表单数据，有方法ReadAsMultipartAsync：

data = await req.Content.ReadAsMultipartAsync().ConfigureAwait(false);