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  • Barcode not generated in C# web forms?

    - by Sinsil Mathew
    I am trying for create a barcode in my web form.for that i download font IDAutomationHC39M and install in my system,then i run my wesite in localhost but barcode cannot be generated.This is my code protected void Button1_Click1(object sender, EventArgs e) { string barCode = TextBox1.Text; System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image(); using (Bitmap bitMap = new Bitmap(barCode.Length * 40, 80)) { using (Graphics graphics = Graphics.FromImage(bitMap)) { Font oFont = new Font("IDAutomationHC39M", 16); PointF point = new PointF(2f, 2f); SolidBrush blackBrush = new SolidBrush(Color.Black); SolidBrush whiteBrush = new SolidBrush(Color.White); graphics.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height); graphics.DrawString("*" + barCode + "*", oFont, blackBrush, point); } using (MemoryStream ms = new MemoryStream()) { bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); byte[] byteImage = ms.ToArray(); Convert.ToBase64String(byteImage); imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage); } plBarCode.Controls.Add(imgBarCode); } And the result is appear like that code

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  • Probelem, executing commands in cmd using c#

    - by srk
    I need to execute the below command in command prompt. C:\MySQL\MySQL Server 5.0\bin>mysql -uroot -ppassword < d:/admindb/aar.sql When i do this manually in cmd, i am getting my results. Now i am trying to do this programatically, to execute it in cmd from c# code. I am using the below code to do it. I am not getting any errors and Result !!! When i debug, i get the value of string commandLine as below, "\"C:\\MySQL\\MySQL Server 5.0\\bin\\\" -uroot -ppassword > \"D:/admindb/AAR12.sql" I guess the problem is with this string, passed to cmd. How to solve this ??. public void Execute() { string commandLine = "\"" + MySqlCommandPath + "\"" + " -u" + DbUid + " -p" + DbPwd + " > " + "\"" + Path.Combine(Path_Backup, FileName_Backup + ExcID + ".sql"); System.Diagnostics.ProcessStartInfo PSI = new System.Diagnostics.ProcessStartInfo("cmd.exe"); PSI.RedirectStandardInput = true; PSI.RedirectStandardOutput = true; PSI.RedirectStandardError = true; PSI.UseShellExecute = false; System.Diagnostics.Process p = System.Diagnostics.Process.Start(PSI); System.IO.StreamWriter SW = p.StandardInput; System.IO.StreamReader SR = p.StandardOutput; SW.WriteLine(commandLine); SW.Close(); }

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  • Whose fault is a NullReferenceException?

    - by stefan.at.wpf
    I'm currently working on a class which exposes an internal List through a property. The List shall and can be modified. The problem is, entries in the internal list could be set to null from outside the class. My code actually looks like this: class ClassWithList { List<object> _list = new List<object>(); // get accessor, which however returns the reference to the list, // therefore the list can be modified (this is intended) public List<object> Data { get { return _list; } } private void doSomeWorkWithTheList() { foreach(object obj in _list) // do some work with the objects in the list without checking for null. } } So now in the doSomeWorkWithTheList() I could always check whether the current list entry is null or I could just asume that the person using this class doesn't have the great idea to set entries to null. So finally the questions end up in: Whose fault is a NullReferenceException in this case? Is it the fault of the class developer not checking everything for null (which would make code generally - not only in this class - more complex) or is it the fault of the user of this class, as setting a List entry to null doesn't really make sense? I'd tend to generally not check values for null except in some really special cases. Is this a bad style or de facto standard / standard in praxis? I know there's probably no ultimate answer for this, I'm just missing enough experience for such thing and therefore wondering what other developers think about such cases and want to hear what's done in reality about checking null (or not).

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  • How can I get Visual Studio 2010 to show Chinese comments properly

    - by Joe H
    I have some code from a Chinese business partner, but all of the comments in the code which are in Chinese. However, Visual Studio displays them as gibberish. How can I get them to display properly. Here is a code example with some comments converted to gibberish: //Á¬½Óµ½·þÎñÆ÷ void CTestAPIDlg::OnBnClickedButton2() { UpdateData(TRUE); //ÉèÖÃÊÇ·ñ¼Ç¼ÈÕÖ¾ m_ObjRSI->EnableLog(m_bIsOnLogReg,m_bIsOnLogComm); //ÅжÏÊÇ·ñÆôÓôúÀí if (m_bIsOnProxy) { //´úÀí²ÎÊý char proxyIP[64]; char proxyUserName[64]; char proxyUserPwd[64]; ZeroMemory(proxyIP,sizeof(proxyIP)); ZeroMemory(proxyUserName,sizeof(proxyUserName)); ZeroMemory(proxyUserPwd,sizeof(proxyUserPwd)); //×¢£º´Ë´¦ÒòΪÊÇʹÓÃunicode±àÒ룬ËùÒÔÒª×Ö·ûת»»£¬ÏÂͬ. WideCharToMultiByte(CP_ACP,0,m_strProxyIP,-1,proxyIP,64,NULL,NULL); WideCharToMultiByte(CP_ACP,0,m_strProxyUserName,-1,proxyUserName,64,NULL,NULL); WideCharToMultiByte(CP_ACP,0,m_strProxyPwd,-1,proxyUserPwd,64,NULL,NULL); //ÉèÖôúÀí²ÎÊý m_ObjRSI->SetProxyParam(proxyIP,m_iProxyPort,proxyUserName,proxyUserPwd,m_iProxyType); } //Á¬½Ó²ÎÊý char szIp[64]; ZeroMemory(szIp,sizeof(szIp)); WideCharToMultiByte(CP_ACP,0,m_strIP,-1,szIp,64,NULL,NULL); //Á¬½Ó·þÎñÆ÷ m_ObjRSI->SetCommParam(szIp,m_iPort,m_iCheckIDPort); m_ObjRSI->StartService(); //ÉèÖð´Å¥×´Ì¬ ((CButton*)GetDlgItem(IDC_CHECK2))->EnableWindow(FALSE); ((CButton*)GetDlgItem(IDC_CHECK3))->EnableWindow(FALSE); } Thanks in advance for any help...

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  • WPF Binding to variable / DependencyProperty

    - by Peter
    I'm playing around with WPF Binding and variables. Apparently one can only bind DependencyProperties. I have come up with the following, which works perfectly fine: The code-behind file: public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } public string Test { get { return (string)this.GetValue(TestProperty); } set { this.SetValue(TestProperty, value); } //set { this.SetValue(TestProperty, "BBB"); } } public static readonly DependencyProperty TestProperty = DependencyProperty.Register( "Test", typeof(string), typeof(MainWindow), new PropertyMetadata("CCC")); private void button1_Click(object sender, RoutedEventArgs e) { MessageBox.Show(Test); Test = "AAA"; MessageBox.Show(Test); } } XAML: <Window x:Class="WpfApplication3.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase" Title="MainWindow" Height="350" Width="525" DataContext="{Binding RelativeSource={RelativeSource Self}}"> <Grid> <TextBox Height="31" HorizontalAlignment="Left" Margin="84,86,0,0" Name="textBox1" VerticalAlignment="Top" Width="152" Text="{Binding Test, Mode=TwoWay, diag:PresentationTraceSources.TraceLevel=High}"/> <Button Content="Button" Height="23" HorizontalAlignment="Left" Margin="320,85,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> <TextBox Height="31" HorizontalAlignment="Left" Margin="84,138,0,0" Name="textBox2" Text="{Binding Test, Mode=TwoWay}" VerticalAlignment="Top" Width="152" /> </Grid> The two TextBoxes update one an other. And the Button sets them to "AAA". But now I replaced the Setter function with the one that is commented out (simulating some manipulation of the given value). I would expect that whenever the property value is changed it will be reset to "BBB". It does so when you press the button, that is when you set the property in code. But it does for some reason not affect the WPF Bindings, that is you can change the TextBox contents and thus the property, but apparently the Setter is never called. I wonder why that is so, and how one would go about to achive the expected behaviour.

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  • Calling from C# to C function which accept a struct array allocated by caller

    - by lifey
    I have the following C struct struct XYZ { void *a; char fn[MAX_FN]; unsigned long l; unsigned long o; }; And I want to call the following function from C#: extern "C" int func(int handle, int *numEntries, XYZ *xyzTbl); Where xyzTbl is an array of XYZ of size numEntires which is allocated by the caller I have defined the following C# struct: [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, CharSet = System.Runtime.InteropServices.CharSet.Ansi)] public struct XYZ { public System.IntPtr rva; [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst = 128)] public string fn; public uint l; public uint o; } and a method: [System.Runtime.InteropServices.DllImport(@"xyzdll.dll", CallingConvention = CallingConvention.Cdecl)] public static extern Int32 func(Int32 handle, ref Int32 numntries, [MarshalAs(UnmanagedType.LPArray)] XYZ[] arr); Then I try to call the function : XYZ xyz = new XYZ[numEntries]; for (...) xyz[i] = new XYZ(); func(handle,numEntries,xyz); Of course it does not work. Can someone shed light on what I am doing wrong ?

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  • Algorithm complexity question

    - by Itsik
    During a recent job interview, I was asked to give a solution to the following problem: Given a string s (without spaces) and a dictionary, return the words in the dictionary that compose the string. For example, s= peachpie, dic= {peach, pie}, result={peach, pie}. I will ask the the decision variation of this problem: if s can be composed of words in the dictionary return yes, otherwise return no. My solution to this was in backtracking (written in Java) public static boolean words(String s, Set<String> dictionary) { if ("".equals(s)) return true; for (int i=0; i <= s.length(); i++) { String pre = prefix(s,i); // returns s[0..i-1] String suf = suffix(s,i); // returns s[i..s.len] if (dictionary.contains(pre) && words(suf, dictionary)) return true; } return false; } public static void main(String[] args) { Set<String> dic = new HashSet<String>(); dic.add("peach"); dic.add("pie"); dic.add("1"); System.out.println(words("peachpie1", dic)); // true System.out.println(words("peachpie2", dic)); // false } What is the time complexity of this solution? I'm calling recursively in the for loop, but only for the prefix's that are in the dictionary. Any idea's?

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  • im i doing this right or wrong using pointers in C

    - by Amandeep Singh Dhari
    i like to point out that i need some help with my home work, ok the lectuer gave us the idea of a program and we have to make it from bottom to top. got to have user to type in two set of string. pointers take in the value and then puts into a prototype i need to make a 3rd pointer that has the value of p1 and p2. like this p1 = asd, p2 = qwe and p3 = asdqwe #include "stdafx.h" #include <ctype.h> char *mystrcat(char*s1p, char*s2p); // Prototype char main(void) { char string1[80]; char string2[80]; printf("%s", "enter in your srting one "); gets_s(string1); printf("%s", "enter in your srting two "); gets_s(string2); *mystrcat(string1, string2); return 0; } char *mystrcat(char *s1p,char *s2p) { //char *string3; //char *string4; //string3 = s1p; //string4 = s2p; printf("whatever = %s%s\n", s1p, s2p); return 0; } this is the code that i made so far just need some help, thank guys in advance.

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  • when I am executing webdriver scripts from command prompt I get error "could not find or load main class

    - by Rahul Belhekar
    I want to run below java file from command prompt. whenever I am running it from command line it gives error "Error:Could not find or load main class".This is regular java code.It runs well in eclipse but gives this error in command prompt.I have set classpath till my project bin also set "path" till bin folder of jdk, this file is getting compiled but not running from command prompt.please help me to resolve my issue.Waiting for your reply thank you public class RILookBookGetTheLook extends Libraryfile { public static void main(String[] args) { //Delcaring objects //String className = this.getClass().getName(); WebDriver driver; String baseUrl; final Log LOG = LogFactory.getLog(BrowserLocator.class); CsvWriter out; try { setUp(); } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); } try { Display_ProductPage(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } try { tearDown(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } I have written methods here which I called from main method Please guys help me to solve this problem

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  • UITableView not getting populated with sqlite database column

    - by Ingila Ejaz
    Here's the code of a method I used to populate UITableView with the contents of a column in sqlite database. However, this is giving no errors at run-time but still does not give any data in UITableView. If anyone could help, it'll be highly appreciated. - (void)viewDidLoad{ [super viewDidLoad]; self.title = @"Strings List"; UITableViewCell *cell; NSString *docsDir; NSArray *dirPaths; sqlite3_stmt *statement; // Get the documents directory dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); docsDir = [dirPaths objectAtIndex:0]; // Build the path to the database file databasePath = [[NSString alloc]initWithString: [docsDir stringByAppendingPathComponent:@"strings.sqlite"]]; NSFileManager *filemgr = [NSFileManager defaultManager]; if ([filemgr fileExistsAtPath: databasePath ] == NO) { const char *dbpath = [databasePath UTF8String]; if (sqlite3_open(dbpath, &contactDB) == SQLITE_OK) { NSString * query = @"SELECT string FROM strings"; const char * stmt = [query UTF8String]; if (sqlite3_prepare_v2(contactDB, stmt, -1,&statement, NULL)==SQLITE_OK){ if (sqlite3_step(statement) == SQLITE_ROW) { NSString *string = [[NSString alloc]initWithUTF8String:(const char*)sqlite3_column_text(statement, 0)]; cell.textLabel.text = string; } } else NSLog(@"Failed"); sqlite3_finalize(statement); } sqlite3_close(contactDB); } }

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  • When should EntityManagerFactory instance be created/opened ?

    - by masato-san
    Ok, I read bunch of articles/examples how to write Entity Manager Factory in singleton. One of them easiest for me to understand a bit: http://javanotepad.blogspot.com/2007/05/jpa-entitymanagerfactory-in-web.html I learned that EntityManagerFactory (EMF) should only be created once preferably in application scope. And also make sure to close the EMF once it's used (?) So I wrote EMF helper class for business methods to use: public class EmProvider { private static final String DB_PU = "KogaAlphaPU"; public static final boolean DEBUG = true; private static final EmProvider singleton = new EmProvider(); private EntityManagerFactory emf; private EmProvider() {} public static EmProvider getInstance() { return singleton; } public EntityManagerFactory getEntityManagerFactory() { if(emf == null) { emf = Persistence.createEntityManagerFactory(DB_PU); } if(DEBUG) { System.out.println("factory created on: " + new Date()); } return emf; } public void closeEmf() { if(emf.isOpen() || emf != null) { emf.close(); } emf = null; if(DEBUG) { System.out.println("EMF closed at: " + new Date()); } } }//end class And my method using EmProvider: public String foo() { EntityManager em = null; List<Object[]> out = null; try { em = EmProvider.getInstance().getEntityManagerFactory().createEntityManager(); Query query = em.createNativeQuery(JPQL_JOIN); //just some random query out = query.getResultList(); } catch(Exception e) { //handle error.... } finally { if(em != null) { em.close(); //make sure to close EntityManager } } I made sure to close EntityManager (em) within method level as suggested. But when should EntityManagerFactory be closed then? And why EMF has to be singleton so bad??? I read about concurrency issues but as I am not experienced multi-thread-grammer, I can't really be clear on this idea.

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  • binary_search not working for a vector<string>

    - by VaioIsBorn
    #include <iostream> #include <string> #include <vector> #include <algorithm> using namespace std; int main(void) { string temp; vector<string> encrypt, decrypt; int i,n, co=0; cin >> n; for(i=0;i<n;i++) { cin >> temp; encrypt.push_back(temp); } for(i=0;i<n;i++) { cin >> temp; decrypt.push_back(temp); } for(i=0;i<n;i++) { temp = encrypt[i]; if((binary_search(decrypt.begin(), decrypt.end(), temp)) == true) ++co; } cout << co << endl; return 0; } It reads two equal lists of strings and should print out how many of the words in the first list are also found in the second list, simple. Not giving me the expexted results and i think the problem is in binary_search. Can you tell me why ?

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  • Is it possible to create an Android Service that listens for hardware key presses?

    - by VoteBrian
    I'd like to run an Android background service that will act as a keylistener from the home screen or when the phone is asleep. Is this possible? From semi-related examples online, I put together the following service, but get the error, "onKeyDown is undefined for the type Service". Does this mean it can't be done without rewriting Launcher, or is there something obvious I'm missing? public class ServiceName extends Service { @Override public void onCreate() { //Stuff } public IBinder onBind(Intent intent) { //Stuff return null; } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if(event.getAction() == KeyEvent.ACTION_DOWN) { switch(keyCode) { case KeyEvent.KEYCODE_A: //Stuff return true; case KeyEvent.KEYCODE_B: //Stuff return true; //etc. } } return super.onKeyDown(keyCode, event); } } I realize Android defaults to the search bar when you type from the home screen, but this really is just for a very particular use. I don't really expect anyone but me to want this. I just think it'd be nice, for example, to use the camera button to wake the phone.

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  • Issue with GCD and too many threads

    - by dariaa
    I have an image loader class which provided with NSURL loads and image from the web and executes completion block. Code is actually quite simple - (void)downloadImageWithURL:(NSString *)URLString completion:(BELoadImageCompletionBlock)completion { dispatch_async(_queue, ^{ // dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{ UIImage *image = nil; NSURL *URL = [NSURL URLWithString:URLString]; if (URL) { image = [UIImage imageWithData:[NSData dataWithContentsOfURL:URL]]; } dispatch_async(dispatch_get_main_queue(), ^{ completion(image, URLString); }); }); } When I replace dispatch_async(_queue, ^{ with commented out dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{ Images are loading much faster, wich is quite logical (before that images would be loaded one at a time, now a bunch of them are loading simultaneously). My issue is that I have perhaps 50 images and I call downloadImageWithURL:completion: method for all of them and when I use global queue instead of _queue my app eventually crashes and I see there are 85+ threads. Can the problem be that my calling dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0) 50 times in a row makes GCD create too many threads? I thought that gcd handles all the treading and makes sure the number of threads is not huge, but if it's not the case is there any way I can influence number of threads?

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  • BackgroundWorker

    - by vdh_ant
    Hi guys I'm working on some code that calls a service. This service call could fail and if it does I want the system to try again until it works or too much time has passed. I am wondering where I am going wrong as the following code doesn't seem to be working correctly... It randomly only does one to four loops... protected virtual void ProcessAsync(object data, int count) { var worker = new BackgroundWorker(); worker.DoWork += (sender, e) => { throw new InvalidOperationException("oh shiznit!"); }; worker.RunWorkerCompleted += (sender, e) => { //If an error occurs we need to tell the data about it if (e.Error != null) { count++; System.Threading.Thread.Sleep(count * 5000); if (count <= 10) { if (count % 5 == 0) this.Logger.Fatal("LOAD ERROR - The system can't load any data", e.Error); else this.Logger.Error("LOAD ERROR - The system can't load any data", e.Error); this.ProcessAsync(data, count); } } }; worker.RunWorkerAsync(); } Cheers Anthony

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  • What i am doing wrong with Class Overview?

    - by RFM software
    This code not work. Anyone can helpme? .java package rfmsoftware.util.test1; import android.app.Activity; import android.os.Bundle; public class test1 extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button button = (Button)findViewById(R.id.Button01); <---- Error at this line !? } } .xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <EditText android:id="@+id/EditText01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="10"></EditText> <Button android:id="@+id/Button01" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/Scan"></Button> <View android:id="@+id/View01" android:layout_width="wrap_content" android:layout_height="wrap_content"></View> </LinearLayout> .error Button cannot be resolved to a type (type Java problem) ???

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  • Make function non-recursive

    - by user69514
    I'm not sure how to make this function non-recursive. Any ideas?: void foo(int a, int b){ while( a < len && arr[a][b] != -1){ if(++a == len){ a = 0; b++; } } if( a == len){ size++; return; } if( a < (len-1)){ arr[a][b] = 1; arr[a][(b+1)] = 1; foo(a, b); arr[a][b] = -1; arr[a][(b+1)] = -1; } if( a < (len-1) && arr[(a+1)][b] == -1){ arr[a][b] = 0; arr[(a+1)][b] = 0; foo(a,b); arr[a][b] = -1; arr[(a+1)][b] = -1; } }

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  • [C++] My First Go With Function Templates

    - by bobber205
    Thought it was pretty straight forward. But I get a "iterator not dereferencable" errro when running the below code. What's wrong? template<typename T> struct SumsTo : public std::binary_function<T, T, bool> { int myInt; SumsTo(int a) { myInt = a; } bool operator()(const T& l, const T& r) { cout << l << " + " << r; if ((l + r) == myInt) { cout << " does add to " << myInt; } else { cout << " DOES NOT add to " << myInt; } return true; } }; void main() { list<int> l1; l1.push_back(1); l1.push_back(2); l1.push_back(3); l1.push_back(4); list<int> l2; l2.push_back(9); l2.push_back(8); l2.push_back(7); l2.push_back(6); transform(l1.begin(), l1.end(), l2.begin(), l2.end(), SumsTo<int>(10) ); }

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  • NUnit - Multiple properties of the same name? Linking to requirements

    - by Ryan Ternier
    I'm linking all our our System Tests to test cases and to our Requirements. Every requirement has an ID. Every Test Case / System Tests tests a variety of requirements. Every module of code links to multiple requirements. I'm trying to find the best way to link every system test to its driving requirements. I was hoping to do something like: [NUnit.Framework.Property("Release", "6.0.0")] [NUnit.Framework.Property("Requirement", "FR50082")] [NUnit.Framework.Property("Requirement", "FR50084")] [NUnit.Framework.Property("Requirement", "FR50085")] [TestCase(....)] public void TestSomething(string a, string b...) However, that will break because Property is a Key-Value pair. The system will not allow me to have multiple Properties with the same key. The reason I'm wanting this is to be able to test specific requirements in our system if a module changes that touches these requirements. Rather than run over 1,000 system tests on every build, this would allow us to target what to test based on changes done to our code. Some system tests run upwards of 5 minutes (Enterprise healthcare system), so "Just run all of them" isn't a viable solution. We do that, but only before promoting through our environments. Thoughts?

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  • AFNetworking iOS

    - by Jeromiin
    I have a problem with a request in my app, I want to receive a json but because of the completion block my "PRINT 2" is print before my "PRINT 1" and of course my "PRINT 2" is null. I want the contrary and my "PRINT 2" to be filled but I can't manage to do it. -(void) makeConnection { NSURL *url = [NSURL URLWithString:[@"http://monsite.com/iPhonej/verifPseudo.php?login="stringByAppendingString:[_loginField.text stringByAppendingString:[@"&password=" stringByAppendingString:_passField.text]]]]; NSURLRequest *request = [NSURLRequest requestWithURL:url]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; operation.responseSerializer = [AFJSONResponseSerializer serializer]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { self.response = (NSDictionary *)responseObject; NSLog(@"PRINT 1 : %@", self.response[@"la"][@"reponse"][0][@"rep"]); [_dataLock lock]; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { NSLog(@"Request Failed: %@, %@", error, error.userInfo); }]; [operation start]; } - (IBAction)logIn:(id)sender { [self makeConnection]; NSLog(@"PRINT 2 : %@", self.response[@"la"][@"reponse"][0][@"rep"]); } I know that AFNetworking is asynchronous but is there an other way to do the request and receive my json well ? Thank you

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  • Does everything after my try statement have to be encompassed in that try statement to access variab

    - by Mithrax
    I'm learning java and one thing I've found that I don't like, is generally when I have code like this: import java.util.*; import java.io.*; public class GraphProblem { public static void main(String[] args) { if (args.length < 2) { System.out.println("Error: Please specify a graph file!"); return; } FileReader in = new FileReader(args[1]); Scanner input = new Scanner(in); int size = input.nextInt(); WeightedGraph graph = new WeightedGraph(size); for(int i = 0; i < size; i++) { graph.setLabel(i,Character.toString((char)('A' + i))); } for(int i = 0; i < size; i++) { for(int j = 0; j < size; j++) { graph.addEdge(i, j, input.nextInt()); } } // .. lots more code } } I have an uncaught exception around my FileReader. So, I have to wrap it in a try-catch to catch that specific exception. My question is does that try { } have to encompass everything after that in my method that wants to use either my FileReader (in) or my Scanner (input)? If I don't wrap the whole remainder of the program in that try statement, then anything outside of it can't access the in/input because it may of not been initialized or has been initialized outside of its scope. So I can't isolate the try-catch to just say the portion that intializes the FileReader and close the try statement immediately after that. So, is it the "best practice" to have the try statement wrapping all portions of the code that are going to access variables initialized in it? Thanks!

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  • ViewGroup{TextView,...}.getMeasuredHeight gives wrong value is smaller than real height.

    - by Dewr
    ViewGroup(the ViewGroup is containing TextViews having long text except line-feed-character).getMeasuredHeight returns wrong value... that is smaller than real height. how to get rid of this problem? here is the java code: ;public static void setListViewHeightBasedOnChildren(ListView listView) { ListAdapter listAdapter = listView.getAdapter(); if (listAdapter == null) { // pre-condition return; } int totalHeight = 0; int count = listAdapter.getCount(); for (int i = 0; i < count; i++) { View listItem = listAdapter.getView(i, null, listView); listItem.measure(View.MeasureSpec.AT_MOST, View.MeasureSpec.UNSPECIFIED); totalHeight += listItem.getMeasuredHeight(); } ViewGroup.LayoutParams params = listView.getLayoutParams(); params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); listView.setLayoutParams(params); } ; and here is the list_item_comments.xml:; {RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" } {RelativeLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginLeft="8dip" android:layout_marginRight="8dip" } {TextView android:id="@+id/list_item_comments_nick" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="16sp" style="@style/WhiteText" /} {TextView android:id="@+id/list_item_comments_time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:textSize="16sp" style="@style/WhiteText" /} {TextView android:id="@+id/list_item_comments_content" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@id/list_item_comments_nick" android:autoLink="all" android:textSize="24sp" style="@style/WhiteText" /} {/RelativeLayout} {/RelativeLayout} ;

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  • How to check if there is an active session in a JSF page?

    - by Roberto de Santis
    Hi, there is a way to check if there is an active session directly in jsf page? I have try this but it doesn't work: <p:ajaxStatus onerror="#{session == null ? 'idleDialog.show();' : null}" thank you in advance @Update I have see that onerror isn't fired even if viewExpiredException occurr. @Update 1 Ok i have implemented something that may work: <h:form> <p:idleMonitor timeout="10000" idleListener="#{idleMonitorController.idleListener}" onidle="sessionPoll.stop();idleDialog.show();"/> </h:form> <p:dialog header="Sessione scaduta per inattività" widgetVar="idleDialog" modal="true" width="400"> <h:outputText value="Sessione scaduta" /> <h:button value="Ripristina Sessione" onclick="idleDialog.hide();sessionPoll.start();" /> </p:dialog> <h:form prependId="false"> <p:poll widgetVar="sessionPoll" interval="1"/> </h:form> and this is the listner: public void idleListener(IdleEvent event) { System.out.println("aaaa"); final HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest(); request.getSession(false).invalidate(); } now the only problem is that the session.invalidate doesn't work

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  • Custom UIButton Memory Management in dealloc

    - by ddawber
    I am hoping to clarify the processes going on here. I have created a subclass of UIButton whose init method looks like this: - (id)initWithTitle:(NSString *)title frame:(CGRect)btnFrame { self = [UIButton buttonWithType:UIButtonTypeCustom]; [self setTitle:title forState:UIControlStateNormal]; self.frame = btnFrame; return self; } In my view controller I am creating one of these buttons and adding it as a subview: myButton = [[CustomButton alloc] initWithTitle:@"Title" frame:someFrame]; [self.view addSubview:myButton]; In the view controller's dealloc method I log the retain count of my button: - (void)dealloc { NSLog(@"RC: %d", [myButton retainCount]); //RC = 2 [super dealloc]; NSLog(@"RC: %d", [myButton retainCount]); //RC = 1 } The way I understand it, myButton is not actually retained, even though I invoked it using alloc, because in my subclass I created an autorelease button (using buttonWithType:). In dealloc, does this mean that, when dealloc is called the superview releases the button and its retain count goes down to 1? The button has not yet been autoreleased? Or do I need to get that retain count down to zero after calling [super dealloc]? Cheers.

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  • C++ Constructor initialization list strangeness

    - by Andy
    I have always been a good boy when writing my classes, prefixing all member variables with m_: class Test { int m_int1; int m_int2; public: Test(int int1, int int2) : m_int1(int int1), m_int2(int int2) {} }; void main() { Test t(10, 20); // Just an example } However, recently I forgot to do that and ended up writing: class Test { int int1; int int2; public: // Very questionable, but of course I meant to assign ::int1 to this->int1! Test(int int1, int int2) : int1(int1), int2(int2) {} }; Believe it or not, the code compiled with no errors/warnings and the assignments took place correctly! It was only when doing the final check before checking in my code when I realised what I had done. My question is: why did my code compile? Is something like that allowed in the C++ standard, or is it simply a case of the compiler being clever? In case you were wondering, I was using Visual Studio 2008 Thank you.

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