我们正在使用 Box.V2.Sdk 使用以下代码将文件上传到 box.com
Function UploadToBox(ByVal attachedFilename As String, ByVal stream As System.IO.Stream) As Boolean
Dim clientID As String
Dim clientSecret As String
Dim oldRefreshToken As String
Dim newToken As BoxApi.V2.Authentication.OAuth2.OAuthToken
clientID = "your client id"
clientSecret = "you client secret"
Dim tokenProvider As New TokenProvider(clientID, clientSecret)
'''' Reading Refresh token from the file
Dim streamReader As StreamReader
streamReader = System.IO.File.OpenText(Server.MapPath("~\\Box\\BoxApiRefreshToken.txt"))
oldRefreshToken = streamReader.ReadToEnd()
streamReader.Close()
newToken = tokenProvider.RefreshAccessToken(oldRefreshToken)
Dim boxManager As New BoxManager(newToken.AccessToken)
'''' Writing the new Refresh token to the file
Dim streamWriter As New StreamWriter(Server.MapPath("~\\Box\\BoxApiRefreshToken.txt"))
streamWriter.Write(newToken.RefreshToken)
streamWriter.Close()
Dim rootFolder As Folder
rootFolder = boxManager.GetFolder(Folder.Root)
boxManager.CreateFile(rootFolder, attachedFilename, ConvertStreamToByteArray(stream))
Return True
End Function
这里提到 http://www.codeproject.com/Tips/769414/Uploading-files-using-Box-API
UploadToBox 方法处于循环中，并为我们需要上传的每个文件调用。但是，在几次上传后，我们收到了错误
底层连接已关闭：服务器关闭了预期保持活动状态的连接。
直观地看来，与盒子的连接正在关闭。但是从上面的代码中，我们不知道哪个部分正在尝试创建连接，如果它关闭了，则创建一个新的。使用 c# SqlConnection 检查连接是打开还是关闭相当容易。
请提出你的想法。