在WP7上使用C＃格式化LINQ SQL CE數據

Question

我對C＃/ LINQ/WP7開發非常陌生，並且很努力格式化從我的LINQ查詢返回的數據。

我有以下LINQ C＃結構：

var boughtItemsInDB = from DBControl.MoneySpent bought in BoughtItemDB.BoughtItems 
select bought; 

BoughtItems = new ObservableCollection<DBControl.MoneySpent>(boughtItemsInDB); 

爲MoneySpent定義如下;

[Table(Name = "MoneySpent")] 
    public class MoneySpent : INotifyPropertyChanged, INotifyPropertyChanging 
    { 
     // Define ID: private field, public property and database column. 
     private int _itemId; 

     [Column(IsPrimaryKey = true, IsDbGenerated = true, DbType = "INT NOT NULL Identity", CanBeNull = false, AutoSync = AutoSync.OnInsert)] 
     public int ItemId 
     { 
      get 
      { 
       return _itemId; 
      } 
      set 
      { 
       if (_itemId != value) 
       { 
        NotifyPropertyChanging("ItemId"); 
        _itemId = value; 
        NotifyPropertyChanged("ItemId"); 
       } 
      } 
     } 

     // Define item budget: private field, public property and database column. 
     private int _itemBudget; 

     [Column] 
     public int ItemBudget 
     { 
      get 
      { 
       return _itemBudget; 
      } 
      set 
      { 
       if (_itemBudget != value) 
       { 
        NotifyPropertyChanging("ItemBudget"); 
        _itemBudget = value; 
        NotifyPropertyChanged("ItemBudget"); 
       } 
      } 
     } 


     // Define item category: private field, public property and database column. 
     private string _itemCategory; 

     [Column] 
     public string ItemCategory 
     { 
      get 
      { 
       return _itemCategory; 
      } 
      set 
      { 
       if (_itemCategory != value) 
       { 
        NotifyPropertyChanging("ItemCategory"); 
        _itemCategory = value; 
        NotifyPropertyChanged("ItemCategory"); 
       } 
      } 
     } 



     // Define item description: private field, public property and database column. 
     private string _itemDescription; 

     [Column] 
     public string ItemDescription 
     { 
      get 
      { 
       return _itemDescription; 
      } 
      set 
      { 
       if (_itemDescription != value) 
       { 
        NotifyPropertyChanging("ItemDescription"); 
        _itemDescription = value; 
        NotifyPropertyChanged("ItemDescription"); 
       } 
      } 
     } 



     // Define item amount: private field, public property and database column. 
     private decimal _itemAmount; 

     [Column] 
     public decimal ItemAmount 
     { 
      get 
      { 
       return _itemAmount; 
      } 
      set 
      { 
       if (_itemAmount != value) 
       { 
        NotifyPropertyChanging("ItemAmount"); 
        _itemAmount = value; 
        NotifyPropertyChanged("ItemAmount"); 
       } 
      } 
     } 


     // Define item date: private field, public property and database column. 
     private DateTime _itemDateTime; 

     [Column] 
     public DateTime ItemDateTime 
     { 
      get 
      { 
       return _itemDateTime; 
      } 
      set 
      { 
       if (_itemDateTime != value) 
       { 
        NotifyPropertyChanging("ItemDateTime"); 
        _itemDateTime = value; 
        NotifyPropertyChanged("ItemDateTime"); 
       } 
      } 
     } 

我需要格式化從數據庫返回的數據，以下是保存在我的DB：

ItemDateTime - 日期時間，ItemDescription - 字符串，ItemAmount - 十進制

我需要能夠以根據用戶的當前區域設置格式化日期，並將小數格式設置爲2 dp。

我也不確定在獲取數據結果時是否需要使用IQueryable。

任何幫助將不勝感激。

謝謝， 馬克

Answer 1

既然你沒有提供足夠的細節 - 只是你用來顯示數據的總體思路

var boughtItemsInDB = from bought in BoughtItemDB.BoughtItems 
select new { ItemDateTime = bought.ItemDateTime.ToString(), ItemDescription = bought.ItemDescription, ItemAmount = bought.ItemAmount.ToString("0,0.00") }; 

但格式的控制比較好做，而不是在LINQ查詢...

編輯 - 加FRM OP後：

從我看到的MoneySpent類已經爲「數據綁定」準備......

因此，格式化，應在顯示控制來實現......一些信息，請參閱：

• What is the WPF XAML Data Binding equivalent of String.Format?
• http://www.codeproject.com/KB/WPF/binding_in_linq-sql.aspx
• http://odetocode.com/code/740.aspx
• http://www.codeguru.com/csharp/.net/wp7/article.php/c18933