これは本当に私を困惑させました。データベースに 4 つのテーブルがありますが、残念ながら、このテーブルを設計した人は参照制約を作成していません。そのため、利用可能なナビゲーション プロパティはありません。
4 つのテーブルは次のとおりです。
CiscoPhoneReport
ApplicationSummary
CSQActivityReport
CallDistributionSummary
PhoneReportID
これは、CiscoPhoneReport のそれぞれに 1 ApplicationSummary
、3 CSQActivityReport
、および 3があるという考え方ですCallDistributionSummary
。
以下のような JSON 形式の出力が必要です。
`[{
"appSummary":{
"startDate":"2015-09-01T00:00:00",
"endDate":"2015-09-30T00:00:00",
"applicationName":"RationalDrugTherapy",
"callsPresented":14504,
"callsAbandoned":1992,
"callsHandled":12512
},
"csqModel":[
{
"startDate":null,
"csqid":"3",
"callsPresented":6271,
"avgQueueTime":"00:00:21",
"callsHandled":0,
"avgAnswerSpeed":"00:00:00",
"avgHandleTime":"00:02:08",
"callsHandledGreaterThan3t":5742,
"callsAbandoned":99,
"avgAbandonTime":"00:02:20",
"maxQueueTime":"00:25:26",
"maxHandleTime":"00:19:33",
"maxAbandonTime":"00:17:50"
},{
"startDate":null,
"csqid":"3",
"callsPresented":6271,
"avgQueueTime":"00:00:21",
"callsHandled":0,
"avgAnswerSpeed":"00:00:00",
"avgHandleTime":"00:02:08",
"callsHandledGreaterThan3t":1728,
"callsAbandoned":99,
"avgAbandonTime":"00:02:20",
"maxQueueTime":"00:25:26",
"maxHandleTime":"00:19:33",
"maxAbandonTime":"00:17:50"
}, {
"startDate":null,
"csqid":"3",
"callsPresented":6271,
"avgQueueTime":"00:00:21",
"callsHandled":0,
"avgAnswerSpeed":"00:00:00",
"avgHandleTime":"00:02:08",
"callsHandledGreaterThan3t":3363,
"callsAbandoned":99,
"avgAbandonTime":"00:02:20",
"maxQueueTime":"00:25:26",
"maxHandleTime":"00:19:33",
"maxAbandonTime":"00:17:50"
}]
}]`
このために、DTO を作成しました。
`public class AppSummary
{
public string PhoneReportID { get; set; }
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
public string ApplicationName { get; set; }
public int CallsPresented { get; set; }
public int CallsAbandoned { get; set; }
public int CallsHandled { get; set; }
}
`
`public class CSQModel
{
public string StartDate { get; set; }
public string CSQID { get; set; }
public int CallsPresented { get; set; }
public TimeSpan AvgQueueTime { get; set; }
public int CallsHandled { get; set; }
public TimeSpan AvgAnswerSpeed { get; set; }
public TimeSpan AvgHandleTime { get; set; }
public int CallsHandledGreaterThan3t { get; set; }
public int CallsAbandoned { get; set; }
public TimeSpan AvgAbandonTime { get; set; }
public TimeSpan MaxQueueTime { get; set; }
public TimeSpan MaxHandleTime { get; set; }
public TimeSpan MaxAbandonTime { get; set; }
}
`
`public class PhoneReport
{
public AppSummary AppSummary { get; set; }
//Initially, I had it like this
public CSQModel CSQModel { get; set; }
//I renamed the property as LIST to see if I could use it and add data to the list in linq, but I couldn't use the list within select expression in linq.
//public List<CSQModel> CSQModel { get; set; }
}
`
CSQModel クラスには、CSQActivityReport
とCallDistributionSummary
テーブルの両方からのデータが必要です。
以下のように、テーブル結合を含む linq ステートメントを作成できました。
var res = from cpr in db.CiscoPhoneReport
join app in db.ApplicationSummary on cpr.PhoneReportID equals app.PhoneReportID into g1
from appGroup in g1.DefaultIfEmpty()
join csq in db.CSQActivityReport on cpr.PhoneReportID equals csq.PhoneReportID into g2
from csqGroup in g2.DefaultIfEmpty()
join call in db.CallDistributionSummary on cpr.PhoneReportID equals call.PhoneReportID into g3
from callGroup in g3.DefaultIfEmpty()
where cpr.PhoneReportID == phoneReportID
select new PhoneReport
{
AppSummary = new AppSummary
{
StartDate = cpr.StartDate,
EndDate = cpr.EndDate,
ApplicationName = appGroup.ApplicationName,
CallsPresented = appGroup.CallsPresented,
CallsAbandoned = appGroup.CallsAbandoned,
CallsHandled = appGroup.CallsHandled
},
CSQModel = new CSQModel
{
CSQID = csqGroup.CSQID.ToString(),
CallsPresented = csqGroup.CallsPresented,
AvgQueueTime = csqGroup.AvgQueueTime,
AvgHandleTime = csqGroup.AvgHandleTime,
CallsHandledGreaterThan3t = callGroup.CallsHandledGreaterThan3t,
CallsAbandoned = csqGroup.CallsAbandoned,
AvgAbandonTime = csqGroup.AvgAbandonTime,
MaxQueueTime = csqGroup.MaxQueueTime,
MaxHandleTime = csqGroup.MaxHandleTime,
MaxAbandonTime = csqGroup.MaxAbandonTime
}
};
`
私が得ている結果は、SQL の内部結合のように、9 行のデータのセットです。しかし、これは私が望んでいたものではありません。
上記の JSON 形式のデータを取得するにはどうすればよいですか? 私はそれをまったく理解できませんでした。