web api 2文件上传错误

Question

我正在使用此代码处理文件上传到web api:

[HttpPost]
public async Task<IHttpActionResult> Post(string provider)
{  
    if (!Request.Content.IsMimeMultipartContent())
        throw new Exception();

    var streamProvider = new MultipartMemoryStreamProvider();
    await Request.Content.ReadAsMultipartAsync(streamProvider); // FAILS HERE
    foreach (var file in streamProvider.Contents)
    {
        var imageFilename = file.Headers.ContentDisposition.FileName.Trim('\"');
        var imageStream = await file.ReadAsStreamAsync();

    }
}

但它在这里抛出一个错误: await Request.Content.ReadAsMultipartAsync(streamProvider);

错误是:读取MIME多部分正文部分时出错.内部异常是:

{"Cannot access a disposed object."}

关于为什么会出现这个错误的任何想法？

Answer 1

我有类似的问题,但提供的解决方案对我不起作用,所以这是我的:你上传的文件与IIS的安全限制不匹配.

http://forums.asp.net/t/2062896.aspx?Error+reading+MIME+multipart+body+part+when+upload+image

<system.web>
    <httpRuntime maxRequestLength="30000000" /> <!-- if you forget this one it does not work -->
</system.web>

<system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="30000000" />
      </requestFiltering>
    </security>
</system.webServer>