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我想展示我的Windows 8應用程序的歷史，其中包括日期，時間，地板，區域，Longitutde和緯度。我嘗試了下面的代碼，但上面沒有輸出。使用Linq到SQL的Windows Phone
您可以在下面的鏈接中看到我想要顯示在我的應用程序上的圖像。但是當我運行我的程序時，我什麼都看不到。
我有三個類使用LINQ to SQL來檢索數據庫，並通過後援主類顯示信息是History.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.IO.IsolatedStorage;
using System.Data.Linq;
using System.Data.Linq.Mapping;
using System.ComponentModel;
using System.Collections.ObjectModel;
using System.Text;
using System.Data.Linq;
namespace SmartParking
{
public partial class History : PhoneApplicationPage
{
private readonly HistoryDataContext historylog;
public History()
{
InitializeComponent();
// createDB();
}
public HistoryDataContext Log
{
get { return historylog; }
}
public void createDB()
{
using (HistoryDataContext historylog = new HistoryDataContext(HistoryDataContext.DBConnectionString))
{
if (historylog.DatabaseExists() == false)
{
historylog.CreateDatabase();
addDataDB();
}
}
}
public void addDataDB()
{
using (HistoryDataContext historylog = new HistoryDataContext(HistoryDataContext.DBConnectionString))
{
HistoryDB hdb = new HistoryDB
{
// Date = DateTime.Today,
// Time = DateTime.Now.TimeOfDay,
Zone = Checkin.Zone_st,
Floor = Checkin.Floor_st,
location_latitude = Checkin.Latitud_do,
location_longtitud = Checkin.Longtitude_do
};
historylog.history.InsertOnSubmit(hdb);
historylog.SubmitChanges();
GetHistoryLog();
}
}
public IList<HistoryDB> GetHistoryLog()
{
IList<HistoryDB> HistoryList = null;
using (HistoryDataContext historylog = new HistoryDataContext(HistoryDataContext.DBConnectionString))
{
IQueryable<HistoryDB> query = from histoy in historylog.history select histoy;
HistoryList = query.ToList();
}
return HistoryList ;
}
}
}
下一個類是HistoryDB.cs與表和列
[Table]
public class HistoryDB
{
[Column(CanBeNull = false)]
public DateTime Date
{ get; set; }
[Column(CanBeNull = false)]
public TimeSpan Time
{ get; set; }
[Column(CanBeNull = false)]
public String Zone
{ get; set; }
[Column(CanBeNull = false)]
public String Floor
{ get; set; }
[Column(CanBeNull = false)]
public double location_latitude
{ get; set; }
[Column(CanBeNull = false)]
public double location_longtitud
{ get; set; }
}
下一個類是HistoryDataContext.cs。
public class HistoryDataContext:DataContext
{
public static string DBConnectionString = "Data Source=isostore:/History.sdf";
public HistoryDataContext(string DBConnectionString)
: base(DBConnectionString)
{
}
public Table<HistoryDB> history
{
get
{
return this.GetTable<HistoryDB>();
}
}
}
我想要的是從NFC標籤獲取信息並將其存儲在本地數據庫中，然後在歷史頁面中檢索它。下面的代碼是從nfc標籤讀取的，但我不知道如何再次保存在本地數據庫中，然後將其返回到歷史記錄頁面。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Networking.Proximity;
using NdefLibrary.Ndef;
using NdefLibraryWp.Ndef;
using Windows.Networking.Sockets; // needed for DataReader, DataWriter
using Windows.UI.Popups;
using Microsoft.Phone.UserData;
using System.Text;
using Windows.Phone.PersonalInformation;
using SmartParking.Resources;
using System.Diagnostics;
namespace SmartParking
{
public partial class Checkin : PhoneApplicationPage
{
private ProximityDevice _device;
private long _subscriptionIdNdef;
public static double Latitud_do { get; set; }
public static double Longtitude_do { get; set; }
public static string Floor_st { get; set; }
public static string Zone_st { get; set; }
History store = new History();
public Checkin()
{
InitializeProximityDevice();
InitializeComponent();
}
private void SetLogStatus(string newStatus)
{
Dispatcher.BeginInvoke(() => { if (LogStatus != null) LogStatus.Text = newStatus; });
}
private void SetFloorStatus(string newStatus)
{
Dispatcher.BeginInvoke(() => { if (FloorStatus != null) FloorStatus.Text = newStatus; });
}
private void ApplicationBarIconButton_Click(object sender, System.EventArgs e)
{
MessageBox.Show(" ");
}
private void InitializeProximityDevice()
{
_device = Windows.Networking.Proximity.ProximityDevice.GetDefault();
if (_device != null)
{
_subscriptionIdNdef = _device.SubscribeForMessage("NDEF", MessageReceivedHandler);
}
}
private void MessageReceivedHandler(ProximityDevice sender, ProximityMessage message)
{
var rawMsg = message.Data.ToArray();
var ndefMessage = NdefMessage.FromByteArray(rawMsg);
////// Loop over all records contained in the NDEF message
foreach (NdefRecord record in ndefMessage)
{
if (NdefTextRecord.IsRecordType(record))
{
// Convert and extract URI info
var textRecord = new NdefTextRecord(record);
//var str = textRecord.Text;
string[] str = textRecord.Text.Split('|');
var latitude = str[2];
Latitud_do = double.Parse(latitude);
var longtitude = str[3];
Longtitude_do = double.Parse(longtitude);
var Floor_st = str[0];
var Zone_st = str[1];
SetLogStatus("Floor: " + Floor_st + " Zone: " + Zone_st);
SetFloorStatus("Longitude: " + latitude + " Longitude: " + longtitude);
store.addDataDB();
}
}
}
}
}
表的形象是在下面
https://www.dropbox.com/s/g87yta6hegjstge/Untitled.png?dl=0
你有你的觀點添加到您的問題嗎？在視圖中你創建了綁定到表？ – James 2014-09-11 09:36:27
不，我不知道任何關於視圖，以及如何創建綁定到桌子上。對於如此愚蠢，但我只是一個初學者。你可以幫助我或至少爲我提供鏈接，所以我可以瞭解有關視圖和綁定與我的代碼相關 – 2014-09-11 10:23:49
你真的打算在手機上運行SQL Server嗎？ – 2014-09-11 10:33:05