在monoTouch中格式化大量数据

Question

因此，在我当前的项目中，我下载了一个包含大量数据的大型文本文件。现在我必须搜索该文件并检查它是否包含用户输入的数字。在Objective-C，这将是这样的：

 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]; 

    } 

什么是在MonoTouch的做到这一点的最好方法是什么？我已经tryed一些代码，但它仍然没有正确的：

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永远不能为null出于某种原因。或者我必须以不同的方式实现这一点？这段代码是否正确写入？林新的C＃/ MonoTouch，所以我认为它可能会使用一些优化。下面是存储在文本文件数据的一个示例：

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

除了使用在哪里，好像你想要的任何的。如果找到任何匹配，任何返回一个布尔值。这样你不必检查计数。

Answer 2

的LINQ Where子句不返回1或零项，它返回0或多种元素的IEnumerablestring>（这也意味着变量名' TrackTraceFilteredArray'不正确，因为它不是数组）。要解决这个

一种方法是创建一个列表，并检查计数：

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