如何在 web api 2 中读取文件数据？

Question

我使用 MultipartFormDataStreamProvider 读取上传的文件，如下面的 sn-p 所示。但是，这并不安全，因为它将文件直接保存到临时文件。首先，我想检查原始字节并执行一些验证检查。请告诉我如何访问原始字节。

if (Request.Content.IsMimeMultipartContent())
{
    MultipartFormDataStreamProvider streamProvider = new MultipartFormDataStreamProvider("C:\temp");

     return this.Request.Content
            .ReadAsMultipartAsync<MultipartFormDataStreamProvider>(streamProvider)
            .ContinueWith((tsk) =>
            {
                 MultipartFormDataStreamProvider provider = tsk.Result;

            });

}

Answer 1

var provider = await Request.Content.ReadAsMultipartAsync(new MultipartMemoryStreamProvider());

foreach (var c in provider.Contents)
{
  var stream = await c.ReadAsStreamAsync();
  // do something with the stream
}