Question

我有一个程序通过存储过程从数据库中获取值。它的作用是获取值，下载图像然后将其上传到服务器。上传后运行另一个存储过程只是为了将表更新为新的URL。

现在它上传了一些正确的图像然后突然间它使我的ID =“”而我无法理解为什么？

结果为日志文件：

Property ID : 29140
pk_photo_id (TRY): 47334070
 - File : propimage29140_9.jpg has been uploaded to AWS S3 bucket: ruans

Property ID : 30402
pk_photo_id (TRY): 47174447

Property ID : 29330
Property ID :              `<-- why make it nothing`
pk_photo_id (TRY): 47174392
ERROR 6 : Cannot insert duplicate key row in object 'dbo.ET_EXPORT_PROPERTY_QUEUE' with unique index 'idx_pk'. The duplicate key value is (<NULL>).
The statement has been terminated.

我的VB sub发生了这种情况：

Dim files As String() = Directory.GetFiles(txtFolderPath)

            'for each image get file name 
            For Each images As String In files
                Dim id As String = ""
                Dim photoID As String = ""
                Dim position As String = ""
                For Each str As String In IDS

                    If Path.GetFileNameWithoutExtension(sKey).Contains(str) Then
                        id = str
                    End If
                    Log("Property ID" & id)
                    For Each value As String In PhotoIDS
                        photoID = value

                    Next
                    For Each URL As String In fullURL
                        fullURLIndex = URL
                    Next
                Next
                'AWS upload
                Try
                    utility.Upload(txtFolderPath & sKey, bucket)
                Catch
                    needsToExitSub = True
                    Dim cmdSetError As New SqlCommand("ETSP_UPDATE_PHOTO_URLS")
                    cmdSetError.CommandType = CommandType.StoredProcedure
                    cmdSetError.Parameters.AddWithValue("@stype", "L")
                    cmdSetError.Parameters.AddWithValue("@surl", fullURLIndex)
                    cmdSetError.Parameters.AddWithValue("@status", 3)
                    cmdSetError.Parameters.AddWithValue("@pk_photo_id", photoID)
                    Log("pk_photo_id (CATCH): " & photoID)
                    cmdSetError.Parameters.AddWithValue("@bactive", 1)
                    cmdSetError.Parameters.AddWithValue("@property_id", id)
                    cmdSetError.Parameters.AddWithValue("@client_id", clientIDs)
                    conn.Open()
                    cmdSetError.Connection = conn
                    cmdSetError.ExecuteNonQuery()
                    Log(" - ERROR 4 : File : " & sKey & " Image ID : " & photoID & " Has NOT been uploaded to " & bucket & " , URL: " & fullURLIndex)
                    conn.Close()
                    If needsToExitSub = True Then
                        Exit Sub
                    End If
                End Try

                'Make files public - check this
                Dim cannedACL As S3CannedACL = S3CannedACL.PublicRead
                Dim fileNameOnly As String = Path.GetFileNameWithoutExtension(sKey)
                Dim token As String = fileNameOnly.Remove(fileNameOnly.LastIndexOf("_"c))
                Dim number As New String(token.SkipWhile(AddressOf [Char].IsLetter).ToArray())

                'Run stored procudure and update if uploaded
                Dim cmdSet As New SqlCommand("ETSP_UPDATE_PHOTO_URLS")
                cmdSet.CommandType = CommandType.StoredProcedure
                cmdSet.Parameters.AddWithValue("@stype", "L")
                cmdSet.Parameters.AddWithValue("@surl", Convert.ToString("www.url.com/" & bucket & "/" & sKey))
                cmdSet.Parameters.AddWithValue("@status", 2)
                cmdSet.Parameters.AddWithValue("@pk_photo_id", photoID)
                Log("pk_photo_id (TRY): " & photoID)
                cmdSet.Parameters.AddWithValue("@bactive", 1)
                cmdSet.Parameters.AddWithValue("@property_id", id)
                cmdSet.Parameters.AddWithValue("@client_id", clientIDs)
                conn.Open()
                cmdSet.Connection = conn
                cmdSet.ExecuteNonQuery()

                conn.Close()
            Next
            Log(" - File : " & sKey & " has been uploaded to AWS S3 bucket: " & bucket)
        Catch ex As System.NullReferenceException
            Log("ERROR 5 : " & ex.Message)
        Catch ex As Exception
            Log("ERROR 6 : " & ex.Message)
            Exit Try
        End Try

因此图像将文件下载到我的计算机中的正确文件夹中，然后将其上传到正确的文件夹，但是当更新数据库以更新新的URL时，其他参数会给出错误，现在我认为这是因为Property ID :为空。

为什么它会得到正确的Property ID :让我们说8张图片然后得到一段时间的空值然后再次得到正确的Property ID :。以及如何解决这个问题。

C＃help welcome

为什么我的代码使ID为null

0 个答案: