如何阅读表单数据 in Azure 函数？我尝试了多种方法，但总是出现错误，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}");
}
Error: 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，收到的请求为multipart/form-data:
" ------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\[email protected] /cdn-cgi/l/email-protection\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。
由于请求包含“application/x-www-form-urlencoded”类型的内容，因此需要将输入转换为NameValueCollection才能读取输入：
NameValueCollection col = req.Content.ReadAsFormDataAsync().Result;
return req.CreateResponse(HttpStatusCode.OK, $" {col[0]}");
您还可以传递键字符串而不是索引，这将使代码更具可读性和不言自明
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