c# - FileStream.ReadTimeout' 在 C# MVC 中引发了“System.InvalidOperationException”类型的异常

Question

我正在尝试将文件发送到公共 IP。它在文件大小较小但我想发送较大的 .BAK 文件时工作。虽然我试图发送少于 20-30 MB 的 .BAK 文件，但它的作品但不超过 30MB。
我试过：- 在 Web.config

<system.webServer>
  <security>
    <requestFiltering>
      <requestLimits maxAllowedContentLength="2147483648" />
    </requestFiltering>
  </security>
</system.webServer>
 //this also tried
<system.web>
<httpRuntime maxRequestLength="2097152" />
<compilation>
  <assemblies>
    <add assembly="System.Web.Mvc, Version=5.2.7.0, Culture=neutral, PublicKeyToken=31BF3856AD324E38" />
  </assemblies>
</compilation>

</system.web>

- 我尝试增加 IIS 中的最大上传文件大小

           string publicAPI = "https://localhost:44350/Upload/";
            var directory = new DirectoryInfo("D:\\Database");
            var fileName = (from f in directory.GetFiles()
                          orderby f.LastWriteTime descending
                          select f).First();

            Stream fileStream = System.IO.File.OpenRead(fileName.FullName); // here is error:ReadTimeout = 'fileStream.ReadTimeout' threw an exception of type 'System.InvalidOperationException'
            try
            {
                using (var client = new HttpClient())
                {
                    using (var formData = new MultipartFormDataContent())
                    {
                        formData.Add(new StreamContent(fileStream), "Mytic", fileName.Name);
                        var response = client.PostAsync(publicAPI, formData).Result;
                        if (response.IsSuccessStatusCode )
                        {}
                        else
                        {}
                    }
                }
            }

我在 fileStream( error: ReadTimeout = 'fileStream.ReadTimeout' throwed an exception of type 'System.InvalidOperationException ') 中遇到错误。我如何读取大文件（.BAK）？

标签： c#asp.netasp.net-mvcasp.net-coreasp.net-web-api

Answer 1

对您的代码进行了一些更改。让我知道这个是否奏效。

  string publicAPI = "https://localhost:44350/Upload/";
        var directory = new DirectoryInfo("D:\\Database");
        var fileName = (from f in directory.GetFiles()
                        orderby f.LastWriteTime descending
                        select f).First();

        Stream fileStream = System.IO.File.OpenRead(fileName.FullName); // here is error:ReadTimeout = 'fileStream.ReadTimeout' threw an exception of type 'System.InvalidOperationException'
        try
        {
            HttpClientHandler handler = new HttpClientHandler();
            handler.MaxRequestContentBufferSize = 50000*1024;

            using (var client = new HttpClient(handler))
            {

                using (var formData = new MultipartFormDataContent())
                {
                    formData.Add(new StreamContent(fileStream), "Mytic", fileName.Name);
                    var response = client.PostAsync(publicAPI, formData).Result;
                    if (response.IsSuccessStatusCode)
                    { }
                    else
                    { }
                }
            }
        }
        catch (Exception ex)
        { 
        }

在接收端，我将请求长度增加到 700 mb。我测试了我可以上传大文件。下面是我的网络配置。尝试增加请求长度，如下所示。