Windows手機數據綁定問題

Question

我有一個自動生成的類A，如下所示。

class A 
{ 
    string name; 
    int totalCount; 
} 

我查詢數據庫以獲取對象列表，它具有最新的totalCount編號。

在客戶端，我存儲查詢數據庫的最後時間，因此對於每個對象A，我都有以前的totalCount。

在列表框模板中，我想顯示兩個totalCounts之間的區別，我如何使用數據綁定輕鬆實現這一點？

Answer 1

class A 
{ 
    string name; 
    int totalCount; 
} 
class Differences 
{ 
    string name; 
    int oldCount; 
    int newCount; 
    int differenceInCount; 
} 
//this has been set somewhere 
private List<A> previousValues; 
//assume this is going to be set with the next call. 
private List<A> updatedValues; 

//A listbox can be bound to the result of this function. 
private List<Differences> CalculateDifference(){ 
    List<Differences> retval = new List<Differences>; 
    Differences temp; 
    foreach(A updated in updatedValues) 
    { 
     foreach(A previous in previousValues){ 
      if(updated.name == previous.name){ 
       temp = new Differences; 
       temp.name = updated.name; 
       temp.oldCount = previous.totalCount; 
       temp.newCount = updated.totalCount; 
       temp.differenceInCount = temp.newCount - temp.oldCount; 
       retval.Add(temp); 
       break; 
      } 
     } 
    } 
    return retval(); 
}