Azure存儲查詢表返回NULL列

目前，我有一個物聯網設備模擬器，它發送信息給IOT HUB蒙山下面的C＃代碼Azure存儲查詢表返回NULL列

for (int i = 0; i < 50; i++) 
    { 
     int cnt = new Random().Next(1, 5); 
     int Id = new Random().Next(1, 10); 

     var telemetryDataPoint = new 
     { 
      Time = DateTime.Now, 
      DeviceId = "myFirstDevice", 
      Counter = cnt, 
      RestId = Id, 

     }; 
     var messageString = JsonConvert.SerializeObject(telemetryDataPoint); 
     var message = new Message(Encoding.ASCII.GetBytes(messageString)); 

     await deviceClient.SendEventAsync(message); 
     Console.WriteLine("{0} > Sending message: {1}", DateTime.Now, messageString); 

    }

現在我有嘗試讀取數據的另一個C＃控制檯應用程序蔚藍的表存儲作爲

public class SimulatorDeviceEntity : TableEntity 
{ 
    public SimulatorDeviceEntity(string devId, string time) 
    { 
     this.PartitionKey = devId; 
     this.RowKey = time; 
    } 

    public SimulatorDeviceEntity() { } 
    public string counter { get; set; } 
    public string restid { get; set; } 
    public string deviceid { get; set; } 
} 


    static void Main(string[] args) 
    { 
     StorageCredentials creds = new StorageCredentials(accountName, accountKey); 
     CloudStorageAccount account = new CloudStorageAccount(creds, useHttps: true); 

     CloudTableClient client = account.CreateCloudTableClient(); 




     TableQuery<SimulatorDeviceEntity> query = new TableQuery<SimulatorDeviceEntity>().Where(TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, "myFirstDevice")); 


     foreach (SimulatorDeviceEntity entity in table.ExecuteQuery(query)) 
     { 
      Console.WriteLine("{0}, {1}\t{2}\t{3}", entity.PartitionKey, entity.RowKey, 
       entity.counter, entity.restid); 
     } 
     }

現在的問題，我現在面臨這裏我得到的是我得到的表，但與 1）空條目的所有記錄中的列種臺，restId在PartitionKey2）正確的價值觀和RowKey

如何獲得計數器正確的價值觀和restid

Azure存儲表：SimulatorDevice2這裏是截圖 enter image description here

來源

2016-10-06 Vaibhav Ramteke

您還可以分享將消息添加到表存儲的代碼嗎？這將有助於弄清楚發生了什麼事情。 –

模擬器發送消息到IOT HUB，我已經使用Stream Analytics將數據放入Azure表中，查詢如下SELECT DeviceId，RestId，Time，Counter INTO v2deviceOutput from v2deviceInput WHERE DeviceId不爲null注意：v2deviceInput而v2deviceOutput是輸入輸出配置流分析 –

@VaibhavRamteke，任何運氣呢？ – Jackie

嘗試改變計數器的類型。並從字符串到Int64解析。

public class SimulatorDeviceEntity : TableEntity { public SimulatorDeviceEntity(string devId, string time) { this.PartitionKey = devId; this.RowKey = time; } public SimulatorDeviceEntity() { } public Int64 counter { get; set; } public Int64 restid { get; set; } public string deviceId { get; set; } }

同樣，如果要映射「時間」屬性，它是DateTime類型。

來源

2016-10-07 15:52:33 Jackie

Azure存儲查詢表返回NULL列

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