您可以添加 <PackageReference Include="HttpMultipartParser" Version="5.0.0" /> 在.csproj文件中。并使用 var parsedFormBody = MultipartFormDataParser.ParseAsync(req.Body); ,你会得到你的文件。

在邮递员。

调试时

下面是我的测试代码。

[Function("test")]
public static HttpResponseData Run1([HttpTrigger(AuthorizationLevel.Anonymous, "get", "post")] HttpRequestData req,
        FunctionContext executionContext
        )
    {
        // get query params
        var testvalue=executionContext.BindingContext.BindingData["testparams"];
        // get form-body        
        var parsedFormBody =  MultipartFormDataParser.ParseAsync(req.Body);
        var file=parsedFormBody.Result.Files[0];

        var response = req.CreateResponse(HttpStatusCode.OK);
        response.Headers.Add("Content-Type", "text/plain; charset=utf-8");

        response.WriteString("Welcome to Azure Functions!");

        return response;
    }