在monoTouch中格式化大量數據

Question

因此，在我當前的項目中，我下載了一個包含大量數據的大型文本文件。現在我必須搜索該文件並檢查它是否包含用戶輸入的數字。在Objective-C，這將是這樣的：

 NSString *securityCodeData = [[NSUserDefaults standardUserDefaults] stringForKey:@"securityCodeData"]; 

     NSString *trackTraceFileUrlName = [NSString stringWithFormat:@"http://plex.janssen1877.com/app/life/%@",securityCodeData]; 
     NSData *tmpData = [NSData dataWithContentsOfURL:[NSURL URLWithString:trackTraceFileUrlName] ]; 



     //convert data to string 
     NSString *tmpString = [[NSString alloc] initWithData:tmpData encoding:NSUTF8StringEncoding]; 
     NSArray *piecesArray = [tmpString componentsSeparatedByString:@"\n"]; 
     NSMutableArray *trackTraceContent = [NSMutableArray arrayWithArray:piecesArray]; 
     NSLog(@"RAW:%@",trackTraceContent); 

     /*Filtering array for referance*/ 
     NSPredicate *findStringWithReference = [NSPredicate predicateWithFormat:@"SELF CONTAINS [cd] %@",cRText.text]; 
     NSArray *trackTraceContentFiltered = [trackTraceContent filteredArrayUsingPredicate:findStringWithReference]; 
     NSLog(@"Filtered:%@",trackTraceContentFiltered); 


    if ([trackTraceContentFiltered count] == 0) { 
     UIAlertView *invalidCode = [[UIAlertView alloc] initWithTitle:@"Enter a valid reference number!" 
                   message:@"Please enter a valid reference number so we can provide the correct information for you." 
                  delegate:nil 
                cancelButtonTitle:@"Close" 
                otherButtonTitles:nil]; 
     [invalidCode show]; 

    } 

什麼是在MonoTouch的做到這一點的最好方法是什麼？我已經tryed一些代碼，但它仍然沒有正確的：

void GetTrackTraceData() 
     { 


      //Collecting Trace and Trace data from link + security code and converting Track and Trace data into string 
      string TracTraceDataString = NSString.FromData (NSData.FromUrl 
                (NSUrl.FromString ("http://plex.janssen1877.com/app/life/" + NSUserDefaults.StandardUserDefaults ["SecurityToken"])), 
                NSStringEncoding.UTF8); 

      //Seperating the string and putting each object in the 
      string[] TrackTraceDataArray = TracTraceDataString.Split (new char[] { '\n' }); 

      var TrackTraceFilteredArray = TrackTraceDataArray.Where (x => x.Contains (RefNr.Text)); 

      if (TrackTraceFilteredArray == null) { 

       UIAlertView InvalidAlert = new UIAlertView ("Reference number invalid", "The reference number that you have entered is not linked to the current security code. You can change your security code in the settings.", null, "OK", null); 
       InvalidAlert.Show(); 
      }else{ 
       this.PerformSegue ("PushToTrackTraceDetails", this); 
      } 


      foreach (string s in TrackTraceFilteredArray) 
       Console.WriteLine (s); 





     } 

TrackTraceFilteredArray永遠不能爲null出於某種原因。或者我必須以不同的方式實現這一點？這段代碼是否正確寫入？林新的C＃/ MonoTouch，所以我認爲它可能會使用一些優化。下面是存儲在文本文件數據的一個示例：

51405199 0001055479  1302180721 210005  dossier aangemaakt EDI                 
51403415 0001049498  1302150503 TOMTOM101 Order 51403415-3-278065601: ontvangen             
51403415 0001049498  1302151106 TOMTOM241 Order 51403415-3-278065601: gestart              
51403415 0001049498  1302151106 TOMTOM249 Order 51403415-3-278065601: voltooid             
51403577 0001051919  1302150503 TOMTOM101 Order 51403577-3-278065601: ontvangen             
51403577 0001051919  1302151027 TOMTOM241 Order 51403577-3-278065601: gestart              
51403577 0001051919  1302151039 TOMTOM241 Order 51403577-3-278065601: geschatte aankomst 10:57, 18 km op be      
51403577 0001051919  1302151106 TOMTOM249 Order 51403577-3-278065601: voltooid             
51404608 EK1000204732540 1302151708 TOMTOM101 Order 51404608-2-477100892: ontvangen             
51404608 EK1000204732540 1302151708 TOMTOM101 Order 51404608-3-477100892: ontvangen             
51404772 0001052637  1302150520 210005  dossier aangemaakt EDI                 
51404772 0001052637  1302151732 TOMTOM101 Order 51404772-3-278065684: ontvangen             
51404773 0001052688  1302150520 210005  dossier aangemaakt EDI                 
51404773 0001052688  1302151732 TOMTOM101 Order 51404773-3-278065684: ontvangen             
51404774 0001053872  1302150521 210005  dossier aangemaakt EDI                 
51404775 0001053872  1302150521 210005  dossier aangemaakt EDI                 
51404776 0001052689  1302150521 210005  dossier aangemaakt EDI                 
51404777 0001052690  1302150530 210005  dossier aangemaakt EDI                 
51404778 0001053934  1302150630 210005  dossier aangemaakt EDI                 
51404778 0001053934  1302151733 TOMTOM101 Order 51404778-3-278065681: ontvangen             
51404779 0001053934  1302150630 210005  dossier aangemaakt EDI                 
51404779 0001053934  1302151733 TOMTOM101 Order 51404779-3-278065690: ontvangen             
51404780 0001053934  1302150630 210005  dossier aangemaakt EDI                 
51404780 0001053934  1302151733 TOMTOM101 Order 51404780-3-278065691: ontvangen 

Answer 1

除了使用在哪裏，好像你想要的任何的。如果找到任何匹配，任何返回一個布爾值。這樣你不必檢查計數。

Answer 2

的LINQ Where子句不返回1或零項，它返回0或多種元素的IEnumerablestring>（這也意味着變量名' TrackTraceFilteredArray'不正確，因爲它不是數組）。要解決這個

一種方法是創建一個列表，並檢查計數：

var list = new List<string> (TrackTraceFilteredArray); 
if (list.Count == 0) { 
    // invalid 
} else { 
    // ok 
}