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• How can I update a Jtextarea once? (mysql side-?)

  - by user1294196

  Ok what I've been trying to do is figure out how to make it so when I press the search button on my program the code that is currently just being printed to the console will print to the text area I have. I can't figure out how to do this and I've searched google and still found no answer. And while I'm at it if anyone could help me figure out how to send this same line of information to a mysql database that would help greatly. package GTE; import java.awt.EventQueue; public class GTE { private JFrame frmGte; public String hashq = "..."; public String twtresults; public int refresh = 1; public static void main(String[] args) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { try { GTE window = new GTE(); window.frmGte.setVisible(true); } catch (Exception e) {} } }); } /** * Create the application. * @throws IOException * @throws FontFormatException */ public GTE(){ try { initialize(); } catch (FontFormatException e) {} catch (IOException e) {} } /** * Initialize the contents of the frame. * @throws IOException * @throws FontFormatException */ private void initialize() throws FontFormatException, IOException { frmGte = new JFrame(); frmGte.setResizable(false); frmGte.setTitle("GTE"); frmGte.setBounds(100, 100, 450, 390); frmGte.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); GridBagLayout gridBagLayout = new GridBagLayout(); gridBagLayout.columnWidths = new int[]{434, 0}; gridBagLayout.rowHeights = new int[]{21, 0, 0, 0, 0, 0, 0, 0, 0}; gridBagLayout.columnWeights = new double[]{0.0, Double.MIN_VALUE}; gridBagLayout.rowWeights = new double[]{0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, Double.MIN_VALUE}; frmGte.getContentPane().setLayout(gridBagLayout); JLabel GTETitle = new JLabel("Personal Tweet Extractor"); InputStream is = this.getClass().getResourceAsStream("ultraviolentbb_reg.ttf"); Font GTEFont = Font.createFont(Font.TRUETYPE_FONT,is); Font f = GTEFont.deriveFont(24f); GTETitle.setFont(f); GTETitle.setHorizontalAlignment(SwingConstants.CENTER); GridBagConstraints gbc_GTETitle = new GridBagConstraints(); gbc_GTETitle.insets = new Insets(0, 0, 5, 0); gbc_GTETitle.anchor = GridBagConstraints.NORTH; gbc_GTETitle.fill = GridBagConstraints.HORIZONTAL; gbc_GTETitle.gridx = 0; gbc_GTETitle.gridy = 0; frmGte.getContentPane().add(GTETitle, gbc_GTETitle); Label label_2 = new Label("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"); GridBagConstraints gbc_label_2 = new GridBagConstraints(); gbc_label_2.insets = new Insets(0, 0, 5, 0); gbc_label_2.gridx = 0; gbc_label_2.gridy = 1; frmGte.getContentPane().add(label_2, gbc_label_2); JLabel SearchTweets = new JLabel("Search For Tweets With" + hashq + ":"); GridBagConstraints gbc_SearchTweets = new GridBagConstraints(); gbc_SearchTweets.insets = new Insets(0, 0, 5, 0); gbc_SearchTweets.gridx = 0; gbc_SearchTweets.gridy = 2; frmGte.getContentPane().add(SearchTweets, gbc_SearchTweets); JLabel label = new JLabel("#"); GridBagConstraints gbc_label = new GridBagConstraints(); gbc_label.insets = new Insets(0, 0, 5, 0); gbc_label.gridx = 0; gbc_label.gridy = 3; frmGte.getContentPane().add(label, gbc_label); JButton Search = new JButton("Start Search"); Search.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { TS(hashq); GTE.this.refresh = 0; try { nulll dialog = new nulll(); dialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE); dialog.setVisible(true); } catch (Exception e) {} } public void TS(String hashtag){ Twitter twitter = new TwitterFactory().getInstance(); try { System.out.println(hashtag); QueryResult result = twitter.search(new Query("#" + hashtag)); List<Tweet> tweets = result.getTweets(); for (Tweet tweet : tweets) { System.out.println("@" + tweet.getFromUser() + " : " + tweet.getText()); GTE.this.twtresults = ("@" + tweet.getFromUser() + " : " + tweet.getText()); } } catch (TwitterException te) { te.printStackTrace(); System.out.println("Failed to search tweets: " + te.getMessage()); System.exit(-1); } } }); TextField textField = new TextField(); textField.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { GTE.this.hashq = evt.getActionCommand(); } }); GridBagConstraints gbc_textField = new GridBagConstraints(); gbc_textField.ipadx = 99; gbc_textField.insets = new Insets(0, 0, 5, 0); gbc_textField.gridx = 0; gbc_textField.gridy = 4; frmGte.getContentPane().add(textField, gbc_textField); GridBagConstraints gbc_Search = new GridBagConstraints(); gbc_Search.insets = new Insets(0, 0, 5, 0); gbc_Search.gridx = 0; gbc_Search.gridy = 5; frmGte.getContentPane().add(Search, gbc_Search); Label label_1 = new Label("Search Results For Tweets With"); GridBagConstraints gbc_label_1 = new GridBagConstraints(); gbc_label_1.insets = new Insets(0, 0, 5, 0); gbc_label_1.gridx = 0; gbc_label_1.gridy = 6; frmGte.getContentPane().add(label_1, gbc_label_1); TextArea textArea = new TextArea(); textArea.setText(twtresults); textArea.setEditable(false); GridBagConstraints gbc_textArea = new GridBagConstraints(); gbc_textArea.gridx = 0; gbc_textArea.gridy = 7; frmGte.getContentPane().add(textArea, gbc_textArea); JMenuBar menuBar = new JMenuBar(); frmGte.setJMenuBar(menuBar); JMenu Filemenu = new JMenu("File"); menuBar.add(Filemenu); JMenuItem Exititem = new JMenuItem("Exit"); Exititem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { System.exit(0); } }); Filemenu.add(Exititem); JMenu Helpmenu = new JMenu("Help"); menuBar.add(Helpmenu); JMenuItem Aboutitem = new JMenuItem("About"); Helpmenu.add(Aboutitem); } }

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• Inaccessible item using C++ inheritance

  - by shinjuo

  I am working on C++ project that uses inheritance. I seem to have an error in visual studio in the below file administrator.h. It says that salariedemploye:salary on line 17 is inaccessible and I am not sure why. Admin.cpp #include namespace SavitchEmployees { Administrator::Administrator( ):SalariedEmployee(), salary(0) { //deliberately empty } Administrator::Administrator(const string& theName, const string& theSsn, double theAnnualSalary) :SalariedEmployee(theName, theSsn),salary(theAnnualSalary) { //deliberately empty } void Administrator::inputAdminData() { cout << " Enter the details of the administrator " << getName() << endl; cout << " Enter the admin title" << endl; getline(cin, adminTitle); cout << " Enter the area of responsibility " << endl; getline(cin, workingArea); cout << " Enter the immediate supervisor's name " << endl; getline(cin, supervisorName); } void Administrator::outputAdminData() { cout << "Name: " << getName() << endl; cout << "Title: " << adminTitle << endl; cout << "Area of responsibility: " << workingArea << endl; cout << "Immediate supervisor: " << supervisorName << endl; } void Administrator::printCheck() { setNetPay(salary); cout << "\n___________________________________\n" << "Pay to the order of " << getName() << endl << "The sum of" << getNetPay() << "Dollars\n" << "______________________________________\n" << "Check Stub Not negotiable \n" << "Employee Number: " << getSsn() << endl << "Salaried Employee(Administrator). Regular Pay: " << salary << endl << "______________________________________\n"; } } admin.h #include <iostream> #include "salariedemployee.h" using std::endl; using std::string; namespace SavitchEmployees { class Administrator : public SalariedEmployee { public: Administrator(); Administrator(const string& theName, const string& theSsn, double salary); double getSalary() const; void inputAdminData(); void outputAdminData(); void printCheck(); private: string adminTitle;//administrator's title string workingArea;//area of responsibility string supervisorName;//immediate supervisor }; } #endif SalariedEmployee.cpp namespace SavitchEmployees { SalariedEmployee::SalariedEmployee():Employee(),salary(0) { //deliberately empty } SalariedEmployee::SalariedEmployee(const string& theName, const string& theNumber, double theWeeklyPay) :Employee(theName, theNumber), salary(theWeeklyPay) { //deliberately empty } double SalariedEmployee::getSalary() const { return salary; } void SalariedEmployee::setSalary(double newSalary) { salary = newSalary; } void SalariedEmployee::printCheck() { setNetPay(salary); cout << "\n___________________________________\n" << "Pay to the order of " << getName() << endl << "The sum of" << getNetPay() << "Dollars\n" << "______________________________________\n" << "Check Stub NOT NEGOTIABLE \n" << "Employee Number: " << getSsn() << endl << "Salaried Employee. Regular Pay: " << salary << endl << "______________________________________\n"; } } Salariedemplyee.h #ifndef SALARIEDEMPLOYEE_H #define SALARIEDEMPLOYEE_H #include <string> #include "employee.h" namespace SavitchEmployees{ class SalariedEmployee : public Employee{ public: SalariedEmployee(); SalariedEmployee(const string& theName, const string& theSsn, double theWeeklySalary); double getSalary() const; void setSalary(double newSalary); void printCheck(); private: double salary; }; } #endif employee.cpp namespace SavitchEmployees { Employee::Employee():name("No name yet"),ssn("No number yet"),netPay(0){} Employee::Employee(const string& theName, const string& theSsn):name(theName),ssn(theSsn),netPay(0){} string Employee::getName() const { return name; } string Employee::getSsn() const { return ssn; } double Employee::getNetPay() const { return netPay; } void Employee::setName(const string& newName) { name = newName; } void Employee::setSsn(const string& newSsn) { ssn = newSsn; } void Employee::setNetPay(double newNetPay) { netPay = newNetPay; } void Employee::printCheck() const { cout << "\nERROR: pringCheck function called for an \n" << "Undifferentiated employee. Aborting the program!\n" << "Check with the author of this program about thos bug. \n"; exit(1); } }

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• iTextSharp Creating a Footer Page # of #

  - by Rob

  Hi, I'm trying to create a footer on each of the pages in a PDF document using iTextSharp in the format Page # of # following the tutorial on the iText pages and the book. Though I keep getting an exception on cb.SetFontAndSize(helv, 12); - object reference not set to an object. Can anyone see the issue? Code is below. Thanks, Rob public class MyPdfPageEventHelpPageNo : iTextSharp.text.pdf.PdfPageEventHelper { protected PdfTemplate total; protected BaseFont helv; private bool settingFont = false; public override void OnOpenDocument(PdfWriter writer, Document document) { total = writer.DirectContent.CreateTemplate(100, 100); total.BoundingBox = new Rectangle(-20, -20, 100, 100); helv = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED); } public override void OnEndPage(PdfWriter writer, Document document) { PdfContentByte cb = writer.DirectContent; cb.SaveState(); string text = "Page " + writer.PageNumber + " of "; float textBase = document.Bottom - 20; float textSize = 12; //helv.GetWidthPoint(text, 12); cb.BeginText(); cb.SetFontAndSize(helv, 12); if ((writer.PageNumber % 2) == 1) { cb.SetTextMatrix(document.Left, textBase); cb.ShowText(text); cb.EndText(); cb.AddTemplate(total, document.Left + textSize, textBase); } else { float adjust = helv.GetWidthPoint("0", 12); cb.SetTextMatrix(document.Right - textSize - adjust, textBase); cb.ShowText(text); cb.EndText(); cb.AddTemplate(total, document.Right - adjust, textBase); } cb.RestoreState(); } public override void OnCloseDocument(PdfWriter writer, Document document) { total.BeginText(); total.SetFontAndSize(helv, 12); total.SetTextMatrix(0, 0); int pageNumber = writer.PageNumber - 1; total.ShowText(Convert.ToString(pageNumber)); total.EndText(); } }

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• 'Microsoft.Practices.EnterpriseLibrary.Caching.CacheFactory' threw an exception

  - by user281180

  Hi I`m having the error message: The type initializer for 'Microsoft.Practices.EnterpriseLibrary.Caching.CacheFactory' threw an exception. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Practices.ObjectBuilder2, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. Source Error: Line 30: private static ICacheManager GetCacheManager() Line 31: { Line 32: return CacheFactory.GetCacheManager(cacheManagerName); Line 33: } Line 34: } Source File: C:\Dev\DEV\HotHouse\HotHousetest3_rtmClone107\Code\MvcUI\State\PersistentCache.cs Line: 32 Assembly Load Trace: The following information can be helpful to determine why the assembly 'Microsoft.Practices.ObjectBuilder2, Version=2.2.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded. , whereas my colleages using the same dll, are not having the error message. Help please. I have Microsoft.Practices.EnterpriseLibrary.Caching and Microsoft.Practices.EnterpriseLibrary.Common as references both version 4.1.0.0 and runtime version v2.0.50727.

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• 'EditItem' is not allowed for this view - databinding issue

  - by Pawan

  Hi, I am trying to do data binding in WPF on data grid using a cutom list. My custom list class contains a private data list of type List. I can not expose this list however the indexers are exposed for seeting and getting individual items. My custom class looks like this: public abstract class TestElementList<T> : IEnumerable where T : class { protected List<T> Data { get; set; } public virtual T Get(int index) { T item = Data[index]; return item; } public virtual void Set(int index, T item) { Data[index] = item; } ... } The data is binded but when I try to edit it, i get "'EditItem' is not allowed for this view." Error. On doing extensive searching over web, I found that i might need to implement IEditableCollectionView interface also. Can anybody please help me to either give pointers on how to implement this interface or any suggest any other better way to do databinding on custom list. Thanks in advance.

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• Manually setting breakpoints in WinDBG

  - by chris

  I am trying to examine the assembly for an executable using WinDBG, but I am having a hard time getting to it. I want to set a breakpoint at the first instruction in my program, but when I try to do that manually (using the address of the module), WinDBG tells me that it is "unable to insert breakpoint" at that location due to an "Invalid access to memory location." I notice that when I create a breakpoint through the source code GUI, the address is not the same as the first part of my module (In my example: "Win32FileOpen", a simple program I wrote.) Is there a header of some sort that requires adding an offset to the address of my module? In another question, I saw the suggestion: "I would attempt to calculate the breakpoint address as: Module start + code start + code offset" but was unsure where to obtain those values. Can somebody please elaborate on this? The reason I don't just use the source GUI is that I want to be able to do this with a program that I may not have the source/symbols for. If there is an easier way to immediately start working with the executable I open, please let me know. (e.g. Opening an .exe Olly immediately shows me the assembly for that .exe, searching for referenced strings gives me results from that module, etc. WinDBG seems to start me off in ntdll.dll, which is not usually useful for me.) 0:000> lm start end module name 00000000`00130000 00000000`0014b000 Win32FileOpen C (private pdb symbols) C:\cfinley\code\Win32FileOpen\Debug\Win32FileOpen.pdb 00000000`73bd0000 00000000`73c2c000 wow64win (deferred) 00000000`73c30000 00000000`73c6f000 wow64 (deferred) 00000000`74fe0000 00000000`74fe8000 wow64cpu (deferred) 00000000`77750000 00000000`778f9000 ntdll (pdb symbols) c:\symbols\mssymbols\ntdll.pdb\15EB43E23B12409C84E3CC7635BAF5A32\ntdll.pdb 00000000`77930000 00000000`77ab0000 ntdll32 (deferred) 0:000> bu 00000000`00130000 0:000> bl 0 e x86 00000000`001413a0 0001 (0001) 0:**** Win32FileOpen!main <-- One that is generated via GUI 1 e x86 00000000`00130000 0001 (0001) 0:**** Win32FileOpen!__ImageBase <-- One I tried to set manually 0:000> g Unable to insert breakpoint 1 at 00000000`00130000, Win32 error 0n998 "Invalid access to memory location." bp1 at 00000000`00130000 failed WaitForEvent failed ntdll!LdrpDoDebuggerBreak+0x31: 00000000`777fcb61 eb00 jmp ntdll!LdrpDoDebuggerBreak+0x33 (00000000`777fcb63)

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• Serializing object with no namespaces using DataContractSerializer

  - by Yurik

  How do I remove XML namespaces from an object's XML representation serialized using DataContractSerializer? That object needs to be serialized to a very simple output XML. Latest & greatest - using .Net 4 beta 2 The object will never need to be deserialized. XML should not have any xmlns:... namespace refs Any subtypes of Exception and ISubObject need to be supported. It will be very difficult to change the original object. Object: [Serializable] class MyObj { string str; Exception ex; ISubObject subobj; } Need to serialize into: <xml> <str>...</str> <ex i:nil="true" /> <subobj i:type="Abc"> <AbcProp1>...</AbcProp1> <AbcProp2>...</AbcProp2> </subobj> </xml> I used this code: private static string ObjectToXmlString(object obj) { if (obj == null) throw new ArgumentNullException("obj"); var serializer = new DataContractSerializer( obj.GetType(), null, Int32.MaxValue, false, false, null, new AllowAllContractResolver()); var sb = new StringBuilder(); using (var xw = XmlWriter.Create(sb, new XmlWriterSettings { OmitXmlDeclaration = true, NamespaceHandling = NamespaceHandling.OmitDuplicates, Indent = true })) { serializer.WriteObject(xw, obj); xw.Flush(); return sb.ToString(); } } From this article I adopted a DataContractResolver so that no subtypes have to be declared: public class AllowAllContractResolver : DataContractResolver { public override bool TryResolveType(Type dataContractType, Type declaredType, DataContractResolver knownTypeResolver, out XmlDictionaryString typeName, out XmlDictionaryString typeNamespace) { if (!knownTypeResolver.TryResolveType(dataContractType, declaredType, null, out typeName, out typeNamespace)) { var dictionary = new XmlDictionary(); typeName = dictionary.Add(dataContractType.FullName); typeNamespace = dictionary.Add(dataContractType.Assembly.FullName); } return true; } public override Type ResolveName(string typeName, string typeNamespace, Type declaredType, DataContractResolver knownTypeResolver) { return knownTypeResolver.ResolveName(typeName, typeNamespace, declaredType, null) ?? Type.GetType(typeName + ", " + typeNamespace); } }

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• Using MVVM, how to pass SelectedItems of a XamDataGrid as parameter to the Command raised by the Co

  - by saddaypally

  Hi, I'm trying to pass the item on XamDataGrid on which I do a mouse right click to open a ContextMenu, which raises a Command in my ViewModel. Somehow the method that the Command calls is not reachable in debug mode. This is the snipped from the view <ig:XamDataGrid DataSource="{Binding DrdResults}" Height="700" Width="600"> <ig:XamDataGrid.ContextMenu> <ContextMenu DataContext="{Binding RelativeSource={RelativeSource Mode=Self}, Path=PlacementTarget.DataContext}" AllowDrop="True" Name="cmAudit"> <MenuItem Header="View History" Command="{Binding ViewTradeHistory}" CommandParameter="{Binding Path=SelectedItems}"> </MenuItem> </ContextMenu> </ig:XamDataGrid.ContextMenu> <ig:XamDataGrid.FieldSettings> <ig:FieldSettings AllowFixing="NearOrFar" AllowEdit="False" Width="auto" Height="auto" /> </ig:XamDataGrid.FieldSettings> </ig:XamDataGrid> My code in the corresponding ViewModel for this View is as follows public WPF.ICommand ViewTradeHistory { get { if (_viewTradeHistory == null) { _viewTradeHistory = new DelegateCommand( (object SelectedItems) = { this.OpenTradeHistory(SelectedItems); }); } return _viewTradeHistory; } } And lastly the actual method that gets called by the Command is as below private void OpenTradeHistory(object records) { DataPresenterBase.SelectedItemHolder auditRecords = (DataPresenterBase.SelectedItemHolder)records; // Do something with the auditRecords now. } I'm not sure what am I doing incorrectly here. Any help will be very much appreciated. Thanks, Shravan

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• RIA Services EntitySet does not support 'Edit' opperation

  - by Savvas Sopiadis

  Hello everbody! Making my first steps in RIA Services (VS2010Beta2) and i encountered this problem: created an EF Model (no POCOs), generic repository on top of it and a RIA Service(hosted in an ASP.NET MVC application) and tryed to get data from within the ASP.NET MVC application: worked well. Next step: Silverlight client. Got a reference to the RIAService (through its context), queried for all the records of the repository and got them into the SL application as well (using this code sample): private ObservableCollection<Culture> _cultures = new ObservableCollection<Culture>(); public ObservableCollection<Culture> cultures { get { return _cultures; } set { _cultures = value; RaisePropertyChanged("cultures"); } } .... //Get cultures EntityQuery<Culture> queryCultures = from cu in dsCtxt.GetAllCulturesQuery() select cu; loCultures = dsCtxt.Load(queryCultures); loCultures.Completed += new EventHandler(lo_Completed); .... void loAnyCulture_Completed(object sender, EventArgs e) { ObservableCollection<Culture> temp= new ObservableCollection<Culture>loAnyCulture.Entities); AnyCulture = temp[0]; } The problem is this: whenever i try to edit some data of a record (in this example the first record) i get this error: This EntitySet of type 'Culture' does not support the 'Edit' operation. I thought that i did something weird and tryed to create an object of type Culture and assign a value to it: it worked well! What am i missing? Do i have to declare an EntitySet? Do i have to mark it? Do i have to...what? Thanks in advance

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• RadGrid OnNeedDataSource when the returned datasource is empty, I get a "Cannot find any bindable pr

  - by Matt

  RadGrid OnNeedDataSource when the returned datasource is empty (not null), I get a "Cannot find any bindable properties in an item from the datasource" This is how I have my RadGrid defined in the ASP markup <telerik:RadGrid runat="server" ID="RadGridSearchResults" AllowFilteringByColumn="false" ShowStatusBar="true" AllowPaging="True" AllowSorting="true" VirtualItemCount="10000" AllowCustomPaging="True" OnNeedDataSource="RadGridSearchResults_NeedDataSource" Skin="Default" GridLines="None" ShowGroupPanel="false" GroupLoadMode="Client"> <MasterTableView Width="100%" > <NoRecordsTemplate> <asp:Label ID="LabelNoRecords" runat="server" Text="No Results Found for your Query"/> </NoRecordsTemplate> </MasterTableView> <PagerStyle Mode="NextPrevAndNumeric" /> <FilterMenu EnableTheming="True"> <CollapseAnimation Duration="200" Type="OutQuint" /> </FilterMenu> </telerik:RadGrid> Here is my OnNeedDataSource protected void RadGridSearchResults_NeedDataSource(object source, GridNeedDataSourceEventArgs e) { RadGridSearchResults.DataSource = GetSearchResults(); } And here is my GetSearchResults() private DataTable GetSearchResults() { DataTable dataTableResults = new DataTable(); // Get my data results -- When I get no results, I have a datable with 0 rows return dataTableResults; } This works great when I have results in my DataSet and other tables of mine setup similarly work with the NoRecordsTemplate tag when results are empty. Any clue?

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• C# WebBrowser.ShowPrintDialog() not showing

  - by jeah_wicer

  I have this peculiar problem while wanting to print a html-report. The file itself is a normal local html file, located on my hard drive. To do this, I have tried the following: public static void PrintReport(string path) { WebBrowser wb = new WebBrowser(); wb.Navigate(path); wb.ShowPrintDialog() } And I have this form with a button with the click event: private void button1_Click(object sender, EventArgs e) { string path = @"D:\MyReport.html"; PrintReport(path); } This does absolutely nothing. Which is kind of strange... but things get stranger... When editing the print function to do the following: public static void PrintReport(string path) { WebBrowser wb = new WebBrowser(); wb.Navigate(path); MessageBox.Show("TEST"); wb.ShowPrintDialog() } It works. Yes, only adding a MessageBox. The MessageBox is showing and after it comes the print dialog. I have also tried with Thread.Sleep(1000) instead, which doesn't work. Can anyone explain to me what's going on here? Why would a messagebox make any difference? Can it be some kind of permission problem? I've reproduced this on both Windows 7 and 8, same thing. I made this small application with only the above code to isolate the problem. I am quite sure it works on windows XP though, since an older version of the application I'm working on runs on it. When trying to do this directly with the mshtml-dll instead I also get problems. Any input or clarification is greatly appreciated!

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• WPF WriteableBitmap Memory Leak?

  - by Mario

  Hello, everyone! I'm trying to figure out how to release a WriteableBitmap memory. In the next section of code I fill the backbuffer of a WriteableBitmap with a really large amount of data from "BigImage" (3600 * 4800 px, just for testing) If I comment the lines where bitmap and image are equaled to null, the memory it´s not release and the application consumes ~230 MB, even when Image and bitmap are no longer used! As you can see at the end of the code its necessary to call GC.Collect() to release the memory. So the question is, what is the right way to free the memory used by a WriteableBitmap object? Is GC.Collect() the only way? Any help would be great. PS. Sorry for my bad english. private void buttonTest_Click(object sender, RoutedEventArgs e) { Image image = new Image(); image.Source = new BitmapImage(new Uri("BigImage")); WriteableBitmap bitmap = new WriteableBitmap( (BitmapSource)image.Source); bitmap.Lock(); // Bitmap processing bitmap.Unlock(); image = null; bitmap = null; GC.Collect(); }

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• Is it possible for a WPF control to have an ActualWidth and ActualHeight if it has never been render

  - by DanM

  I need a Viewport3D for the sole purpose of doing geometric calculations using Petzold.Media3D.ViewportInfo. I do now want to place it in a Window. I'm creating a Viewport3D using the following code: private Viewport3D CreateViewport(MainSettings settings) { var cameraPosition = new Point3D(0, 0, settings.CameraHeight); var cameraLookDirection = new Vector3D(0, 0, -1); var cameraUpDirection = new Vector3D(0, 1, 0); var camera = new PerspectiveCamera { Position = cameraPosition, LookDirection = cameraLookDirection, UpDirection = cameraUpDirection }; var viewport = new Viewport3D { Camera = camera, Width = settings.ViewportWidth, Height = settings.ViewportHeight }; return viewport; } Later, I'm attempting to use this viewport to convert the mouse location to a 3D location using this method: public Point3D? Point2dToPoint3d(Point point) { var range = new LineRange(); var isValid = ViewportInfo.Point2DtoPoint3D(_viewport, point, out range); if (isValid) return range.PointFromZ(0); else return null; } Unfortunately, it's not working. I think the reason is that the ActualWidth and ActualHeight of the viewport and both zero (and these are read-only properties, so I can't set them manually). (I have tested the exact same with an actual rendered Viewport3D, so I know the issue is not with my converter method.) Any idea how I can get WPF to assign the ActualWidth and ActualHeight based on my Width and Height settings? I tried setting the HorizontalAlignment and VerticalAlignment to Left and Top, respectively, and I also messed with the MinWidth and MinHeight, but none of these properties had any effect on the ActualWidth or ActualHeight.

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• Mocking HttpContext in .NET MVC2 using Moq

  - by Richard

  Hi, This was working in MVC 1, but has broken in MVC 2. I'm mocking the HttpContext so I can test routes. The code was originally taken from Steven Sanderson's book. I've tried mocking some extra properties as suggested in this comment but it hasn't fixed it. What am I missing? This is the start of my test code. routeData is null when this code completes. // Arange RouteCollection routeConfig = new RouteCollection(); MvcApplication.RegisterRoutes(routeConfig); var mockHttpContext = makeMockHttpContext(url); // Act RouteData routeData = routeConfig.GetRouteData(mockHttpContext.Object); This method creates my mock HttpContext: private static Mock<HttpContextBase> makeMockHttpContext(String url) { var mockHttpContext = new Mock<System.Web.HttpContextBase>(); // Mock the request var mockRequest = new Mock<HttpRequestBase>(); mockHttpContext.Setup(t => t.Request).Returns(mockRequest.Object); mockRequest.Setup(t => t.AppRelativeCurrentExecutionFilePath).Returns(url); // Tried adding these to fix in MVC2 (didn't work) mockRequest.Setup(r => r.HttpMethod).Returns("GET"); mockRequest.Setup(r => r.Headers).Returns(new NameValueCollection()); mockRequest.Setup(r => r.Form).Returns(new NameValueCollection()); mockRequest.Setup(r => r.QueryString).Returns(new NameValueCollection()); mockRequest.Setup(r => r.Files).Returns(new Mock<HttpFileCollectionBase>().Object); // Mock the response var mockResponse = new Mock<HttpResponseBase>(); mockHttpContext.Setup(t => t.Response).Returns(mockResponse.Object); mockResponse.Setup(t => t.ApplyAppPathModifier(It.IsAny<String>())).Returns<String>(t => t); return mockHttpContext; }

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• Configuring WCF 4 with routing (global.asax) for both http & https endpoints

  - by jammer59

  I'm still a newbie with wcf and not too well informed in .net in general. I have a WCF 4 web service that uses the global.asax routing approach and very simplified web.config using the standard endpoint method. This wcf service runs as an application with the default web site on iis 7.5 at present. I need it support both http and https interfaces, if possible. If that's too complex then only https. How is that best handled maintaining the current approach? The contents of the global.asax.cs and web.config files are pretty basic: public class Global : HttpApplication { void Application_Start(object sender, EventArgs e) { RegisterRoutes(); } private void RegisterRoutes() { // Edit the base address of Service1 by replacing the "ippay" string below RouteTable.Routes.Add(new ServiceRoute("myservice", new WebServiceHostFactory(), typeof(myservice))); } } <system.serviceModel> <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/> <standardEndpoints> <webHttpEndpoint> <standardEndpoint name="" helpEnabled="true" contentTypeMapper="myservice.Util.RawMapper,myservice"> </standardEndpoint> </webHttpEndpoint> </standardEndpoints>

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• faster implementation of sum ( for Codility test )

  - by Oscar Reyes

  How can the following simple implementation of sum be faster? private long sum( int [] a, int begin, int end ) { if( a == null ) { return 0; } long r = 0; for( int i = begin ; i < end ; i++ ) { r+= a[i]; } return r; } EDIT Background is in order. Reading latest entry on coding horror, I came to this site: http://codility.com which has this interesting programming test. Anyway, I got 60 out of 100 in my submission, and basically ( I think ) is because this implementation of sum, because those parts where I failed are the performance parts. I'm getting TIME_OUT_ERROR's So, I was wondering if an optimization in the algorithm is possible. So, no built in functions or assembly would be allowed. This my be done in C, C++, C#, Java or pretty much in any other. EDIT As usual, mmyers was right. I did profile the code and I saw most of the time was spent on that function, but I didn't understand why. So what I did was to throw away my implementation and start with a new one. This time I've got an optimal solution [ according to San Jacinto O(n) -see comments to MSN below - ] This time I've got 81% on Codility which I think is good enough. The problem is that I didn't take the 30 mins. but around 2 hrs. but I guess that leaves me still as a good programmer, for I could work on the problem until I found an optimal solution: Here's my result. I never understood what is those "combinations of..." nor how to test "extreme_first"

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• In WPF: Children.Remove or Children.Clear doesn't free objects

  - by Bart Roozendaal

  I create some UIElements from code behind and was anticipating the garbage collection to clear up stuff. However, the objects are not free-ed at the time I expected it. I was expecting them to be freeed at RemoveAt(0), but they are only freed at the end of the program. How can I make the objects be freed when removed from the Children collection of the Canvas? <Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300" MouseDown="Window_MouseDown"> <Grid> <Canvas x:Name="main" /> </Grid> </Window> The code behind is: public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void Window_MouseDown(object sender, MouseButtonEventArgs e) { if (main.Children.Count == 0) main.Children.Add(new MyControl() { Background = Brushes.Yellow, Width = 100, Height = 50 }); else main.Children.RemoveAt(0); } } public class MyControl : UserControl { ~MyControl() { Debug.WriteLine("Goodbye"); } }

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• StructureMap Exception Code: 202 No Default Instance defined for PluginFamily

  - by Code Sherpa

  Hi. I am new to StructureMap. I have downloaded and am using version 2.6.1.0. I keep getting the below error: StructureMap Exception Code: 202 No Default Instance defined for PluginFamily Company.ProjectCore.Core.IConfiguration, Company.ProjectCore, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null My Global.asax.cs looks like: protected void Application_Start(object sender, EventArgs e) { var container = new Container(x => { x.For<ICache>().Use<Cache>(); x.For<IEmailService>().Use<EmailService>(); x.For<IUserSession>().Use<UserSession>(); x.For<IRedirector>().Use<Redirector>(); x.For<INavigation>().Use<Navigation>(); }); container.AssertConfigurationIsValid(); } I changed from ObjectFactory.Initialize to "new Container" to debug. When stepping through the AssertConfigurationIsValid() method, Cache works but EmailService fails at the GetInstance method in the following line: private readonly IConfiguration _configuration; public EmailService() { _configuration = ObjectFactory.GetInstance<IConfiguration>(); } If I remove IEmailService, the same 202 error is thrown at IUserSession. Should I be adding something else in Application_Start or in my class files? Thanks in advance...

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• Hibernate + PostgreSQL : relation does not exist - SQL Error: 0, SQLState: 42P01

  - by tommy599

  Hello, I am having some problems trying to work with PostgreSQL and Hibernate, more specifically, the issue mentioned in the title. I've been searching the net for a few hours now but none of the found solutions worked for me. I am using Eclipse Java EE IDE for Web Developers. Build id: 20090920-1017 with HibernateTools, Hibernate 3, PostgreSQL 8.4.3 on Ubuntu 9.10. Here are the relevant files: Message.class package hello; public class Message { private Long id; private String text; public Message() { } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getText() { return text; } public void setText(String text) { this.text = text; } } Message.hbm.xml <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="hello"> <class name="Message" table="public.messages"> <id name="id" column="id"> <generator class="assigned"/> </id> <property name="text" column="messagetext"/> </class> </hibernate-mapping> hibernate.cfg.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">org.postgresql.Driver</property> <property name="hibernate.connection.password">bar</property> <property name="hibernate.connection.url">jdbc:postgresql:postgres/tommy</property> <property name="hibernate.connection.username">foo</property> <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property> <property name="show_sql">true</property> <property name="log4j.logger.org.hibernate.type">DEBUG</property> <mapping resource="hello/Message.hbm.xml"/> </session-factory> </hibernate-configuration> Main package hello; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; public class App { public static void main(String[] args) { SessionFactory sessionFactory = new Configuration().configure() .buildSessionFactory(); Message message = new Message(); message.setText("Hello Cruel World"); message.setId(2L); Session session = null; Transaction transaction = null; try { session = sessionFactory.openSession(); transaction = session.beginTransaction(); session.save(message); } catch (Exception e) { System.out.println("Exception attemtping to Add message: " + e.getMessage()); } finally { if (session != null && session.isOpen()) { if (transaction != null) transaction.commit(); session.flush(); session.close(); } } } } Table structure: foo=# \d messages Table "public.messages" Column | Type | Modifiers -------------+---------+----------- id | integer | messagetext | text | Eclipse console output when I run it Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Environment <clinit> INFO: Hibernate 3.5.1-Final Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Environment <clinit> INFO: hibernate.properties not found Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Environment buildBytecodeProvider INFO: Bytecode provider name : javassist Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Environment <clinit> INFO: using JDK 1.4 java.sql.Timestamp handling Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Configuration configure INFO: configuring from resource: /hibernate.cfg.xml Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Configuration getConfigurationInputStream INFO: Configuration resource: /hibernate.cfg.xml Apr 28, 2010 11:13:53 PM org.hibernate.cfg.Configuration addResource INFO: Reading mappings from resource : hello/Message.hbm.xml Apr 28, 2010 11:13:54 PM org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues INFO: Mapping class: hello.Message -> public.messages Apr 28, 2010 11:13:54 PM org.hibernate.cfg.Configuration doConfigure INFO: Configured SessionFactory: null Apr 28, 2010 11:13:54 PM org.hibernate.connection.DriverManagerConnectionProvider configure INFO: Using Hibernate built-in connection pool (not for production use!) Apr 28, 2010 11:13:54 PM org.hibernate.connection.DriverManagerConnectionProvider configure INFO: Hibernate connection pool size: 20 Apr 28, 2010 11:13:54 PM org.hibernate.connection.DriverManagerConnectionProvider configure INFO: autocommit mode: false Apr 28, 2010 11:13:54 PM org.hibernate.connection.DriverManagerConnectionProvider configure INFO: using driver: org.postgresql.Driver at URL: jdbc:postgresql:postgres/tommy Apr 28, 2010 11:13:54 PM org.hibernate.connection.DriverManagerConnectionProvider configure INFO: connection properties: {user=foo, password=****} Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: RDBMS: PostgreSQL, version: 8.4.3 Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: JDBC driver: PostgreSQL Native Driver, version: PostgreSQL 8.4 JDBC4 (build 701) Apr 28, 2010 11:13:54 PM org.hibernate.dialect.Dialect <init> INFO: Using dialect: org.hibernate.dialect.PostgreSQLDialect Apr 28, 2010 11:13:54 PM org.hibernate.engine.jdbc.JdbcSupportLoader useContextualLobCreation INFO: Disabling contextual LOB creation as createClob() method threw error : java.lang.reflect.InvocationTargetException Apr 28, 2010 11:13:54 PM org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory INFO: Using default transaction strategy (direct JDBC transactions) Apr 28, 2010 11:13:54 PM org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup INFO: No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended) Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Automatic flush during beforeCompletion(): disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Automatic session close at end of transaction: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: JDBC batch size: 15 Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: JDBC batch updates for versioned data: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Scrollable result sets: enabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: JDBC3 getGeneratedKeys(): enabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Connection release mode: auto Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Default batch fetch size: 1 Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Generate SQL with comments: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Order SQL updates by primary key: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Order SQL inserts for batching: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory createQueryTranslatorFactory INFO: Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory Apr 28, 2010 11:13:54 PM org.hibernate.hql.ast.ASTQueryTranslatorFactory <init> INFO: Using ASTQueryTranslatorFactory Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Query language substitutions: {} Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: JPA-QL strict compliance: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Second-level cache: enabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Query cache: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory createRegionFactory INFO: Cache region factory : org.hibernate.cache.impl.NoCachingRegionFactory Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Optimize cache for minimal puts: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Structured second-level cache entries: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Echoing all SQL to stdout Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Statistics: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Deleted entity synthetic identifier rollback: disabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Default entity-mode: pojo Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Named query checking : enabled Apr 28, 2010 11:13:54 PM org.hibernate.cfg.SettingsFactory buildSettings INFO: Check Nullability in Core (should be disabled when Bean Validation is on): enabled Apr 28, 2010 11:13:54 PM org.hibernate.impl.SessionFactoryImpl <init> INFO: building session factory Apr 28, 2010 11:13:55 PM org.hibernate.impl.SessionFactoryObjectFactory addInstance INFO: Not binding factory to JNDI, no JNDI name configured Hibernate: insert into public.messages (messagetext, id) values (?, ?) Apr 28, 2010 11:13:55 PM org.hibernate.util.JDBCExceptionReporter logExceptions WARNING: SQL Error: 0, SQLState: 42P01 Apr 28, 2010 11:13:55 PM org.hibernate.util.JDBCExceptionReporter logExceptions SEVERE: Batch entry 0 insert into public.messages (messagetext, id) values ('Hello Cruel World', '2') was aborted. Call getNextException to see the cause. Apr 28, 2010 11:13:55 PM org.hibernate.util.JDBCExceptionReporter logExceptions WARNING: SQL Error: 0, SQLState: 42P01 Apr 28, 2010 11:13:55 PM org.hibernate.util.JDBCExceptionReporter logExceptions SEVERE: ERROR: relation "public.messages" does not exist Position: 13 Apr 28, 2010 11:13:55 PM org.hibernate.event.def.AbstractFlushingEventListener performExecutions SEVERE: Could not synchronize database state with session org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:179) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) at hello.App.main(App.java:31) Caused by: java.sql.BatchUpdateException: Batch entry 0 insert into public.messages (messagetext, id) values ('Hello Cruel World', '2') was aborted. Call getNextException to see the cause. at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2569) at org.postgresql.core.v3.QueryExecutorImpl$1.handleError(QueryExecutorImpl.java:459) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1796) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:407) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2708) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) ... 8 more Exception in thread "main" org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:92) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:179) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) at hello.App.main(App.java:31) Caused by: java.sql.BatchUpdateException: Batch entry 0 insert into public.messages (messagetext, id) values ('Hello Cruel World', '2') was aborted. Call getNextException to see the cause. at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2569) at org.postgresql.core.v3.QueryExecutorImpl$1.handleError(QueryExecutorImpl.java:459) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1796) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:407) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2708) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) ... 8 more PostgreSQL log file 2010-04-28 23:13:55 EEST LOG: execute S_1: BEGIN 2010-04-28 23:13:55 EEST ERROR: relation "public.messages" does not exist at character 13 2010-04-28 23:13:55 EEST STATEMENT: insert into public.messages (messagetext, id) values ($1, $2) 2010-04-28 23:13:55 EEST LOG: unexpected EOF on client connection If I copy/paste the query into the postgre command line and put the values in and ; after it, it works. Everything is lowercase, so I don't think that it's that issue. If I switch to MySQL, the same code same project (I only change driver,URL, authentication), it works. In Eclipse Datasource Explorer, I can ping the DB and it succeeds. Weird thing is that I can't see the tables from there either. It expands the public schema but it doesn't expand the tables. Could it be some permission issue? Thanks!

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• Silverlight data binding to parent user control's properties with using MVVM in both controls

  - by MagicMax

  Hello! I have two UserControls ("UserControlParentView" and "UserControlChildView") with MVVM pattern implemented in both controls. Parent control is a container for Child control and child control's property should be updated by data binding from Parent control in order to show/hide some check box inside Child control. Parent Control Description UserControlParentViewModel has property: private bool isShowCheckbox = false; public bool IsShowCheckbox { get { return isShowCheckbox; } set { isShowCheckbox = value; NotifyPropertyChanged("IsShowCheckbox"); } } UserControlParentViewModel - how I set DataContext of Parent control: public UserControlParentView() { InitializeComponent(); this.DataContext = new UserControlParentViewModel(); } UserControlParentView contains toggle button (in XAML), bound to UserControlParentViewModel's property IsShowCheckbox <ToggleButton Grid.Column="1" IsChecked="{Binding IsShowCheckbox, Mode=TwoWay}"></ToggleButton> Also Parent control contains instance of child element (somewhere in XAML) <local:UserControlChildView IsCheckBoxVisible="{Binding IsShowCheckbox}" ></local:UserControlChildView> so property in child control should be updated when user togggle/untoggle button. Child control contains Boolean property to be updated from parent control, but nothing happened! Breakpoint never fired! Property in UserControlChildView that should be updated from Parent control (here I plan to make chechBox visible/hidden in code behind): public bool IsCheckBoxVisible { get { return (bool)GetValue(IsCheckBoxVisibleProperty); } set { SetValue(IsCheckBoxVisibleProperty, value); } } // Using a DependencyProperty as the backing store for IsCheckBoxVisible. This enables animation, styling, binding, etc... public static readonly DependencyProperty IsCheckBoxVisibleProperty = DependencyProperty.Register("IsCheckBoxVisible", typeof(bool), typeof(TopMenuButton), new PropertyMetadata(false)); So the question is - what I'm doing wrong? Why child's property is never updated? BTW - there is no any binding error warnings in Output window...

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• DataContractSerializer and deserializing web service response types

  - by matra

  Hi, I am using calling web services and using WCF generated service-reference on the client. I have saved XML responses that are received from test service to disk (without SOAP envelope and body tags) I would like to load them from disk and create objects from them. Lets' take the following method from my web service: SomeMethodResponse SomeMethod(SomeMethodRequest req) I manually (through SOAP UI) save the response to disk to file, Sample response: < SomeMethodResponse xmlns="http://myNamespace"> <SomeMember1>value</SomeMember1> </SomeMethodResponse xmlns="http://myNamespace"> Then I try to deserialize the object from file using: DataContractSerializer dcs = new DataContractSerializer(typeof(SomeMethodResponse)) This fails – the serializer complains with the error, that it is expecting element in namespace 'http://schemas.datacontract.org/2004/07', but found element in 'http://myNamespace'. Question: Why does the DataContractSerializer not use the namespace, that is declared on SomeMethodResponseType with XmlTypeAttribute(Namespace="http://myNamespace")? I can work around this by explicitly providing the namespace and the root element to DataContractSerializer constructor. But then it fails with message similar to: Error in line X position Y (last line of the XMLdocument). 'EndElement' 'SomeMethodResponse from namespace 'httpmyNapespace’ is not expected. Expecting element 'someNameField'. SomeName is an element in the XSD that web service is using. It is also a property on the SomeMethodResponse type, backed by the private field called someNameField. It looks like DataContractSerializer is trying to deserialize the fields in addition to properties. How can I deserailize XML that I have saved from disk and get back the object of same type that SomeMethod is returning? Thanks, Matra

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• Dynamically creating an ImageMap (clickable area on image) in WPF using codebehind.

  - by Thomas Stock

  Hi, I'm trying to create "imagemaps" on an image in wpf using codebehind. See the following XML: <Button Type="Area"> <Point X="100" Y="100"></Point> <Point X="100" Y="200"></Point> <Point X="200" Y="200"></Point> <Point X="200" Y="100"></Point> <Point X="150" Y="150"></Point> </Button> I'm trying to translate this to a button on a certain image in my WPF app. I've already did a part of this, but I'm stuck at setting the Polygon as the button's "template": private Button GetAreaButton(XElement buttonNode) { // get points PointCollection buttonPointCollection = new PointCollection(); foreach (var pointNode in buttonNode.Elements("Point")) { buttonPointCollection.Add(new Point((int)pointNode.Attribute("X"), (int)pointNode.Attribute("Y"))); } // create polygon Polygon myPolygon = new Polygon(); myPolygon.Points = buttonPointCollection; myPolygon.Stroke = Brushes.Yellow; myPolygon.StrokeThickness = 2; // create button based on polygon Button button = new Button(); ????? } I'm also unsure on how to add/remove this button to/from my image, but I'm looking into that. Any help is appreciated.

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• WPF binding to current class property

  - by AnD

  Hello, I have a problem that i cant solve :( I have a user control (xaml file and cs file) in xaml it's like: <UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="Demo.CtrlContent" x:Name="UserControl" d:DesignWidth="598.333" d:DesignHeight="179.133" xmlns:Demo="clr-namespace:Demo" > <UserControl.Resources> <Storyboard x:Key="SBSmall"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="border" Storyboard.TargetProperty="(FrameworkElement.Width)"> <SplineDoubleKeyFrame KeyTime="00:00:01" Value="I WANT TO BIND VALUE HERE"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </UserControl.Resources> <Border BorderBrush="#FFC2C0C1" CornerRadius="3,3,3,3" BorderThickness="1,1,1,1" RenderTransformOrigin="0.5,0.5" x:Name="border" Margin="1,3,1,3" HorizontalAlignment="Left" VerticalAlignment="Top" Width="300"> and .cs file: public partial class CtrlContent { private mindef W { get { return (mindef) Window.GetWindow(this); } } public double MedWidth { // I WANT BIND THIS VALUE GO TO STORYBOARD VALUE IN XAML ABOVE get { double actualW; if(W == null) actualW = SystemParameters.PrimaryScreenWidth; else actualW = W.WrapMain.ActualWidth; return actualW - border.Margin.Left - border.Margin.Right; } } public double SmlWidth { get { return MedWidth / 2; } } public CtrlContent () { this.InitializeComponent(); } public CtrlContent (Content content) { this.InitializeComponent(); Document = content; } } in my .cs file there's a property called MedWidth, and in XAML file there's a storyboard called: SBSmall I want to bind my storyboard value to my property in class ctrlcontent. *the idea is, the storyboard is an animation to resize the control to a certain width depends on its parent container (the width is dynamic) anybody? please :) thanks!

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• Why doesn't my NamedPipeServerStream wait??

  - by Frank Fella

  I'm working with a NamedPipeServerStream to communicate between two processes. Here is the code where I initialize and connect the pipe: void Foo(IHasData objectProvider) { Stream stream = objectProvider.GetData(); if (stream.Length > 0) { using (NamedPipeServerStream pipeServer = new NamedPipeServerStream("VisualizerPipe", PipeDirection.Out, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous)) { string currentDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location); string uiFileName = Path.Combine(currentDirectory, "VisualizerUIApplication.exe"); Process.Start(uiFileName); if(pipeServer.BeginWaitForConnection(PipeConnected, this).AsyncWaitHandle.WaitOne(5000)) { while (stream.CanRead) { pipeServer.WriteByte((byte)stream.ReadByte()); } } else { throw new TimeoutException("Pipe connection to UI process timed out."); } } } } private void PipeConnected(IAsyncResult e) { } But it never seems to wait. I constantly get the following exception: System.InvalidOperationException: Pipe hasn't been connected yet. at System.IO.Pipes.PipeStream.CheckWriteOperations() at System.IO.Pipes.PipeStream.WriteByte(Byte value) at PeachesObjectVisualizer.Visualizer.Show(IDialogVisualizerService windowService, IVisualizerObjectProvider objectProvider) I would think that after the wait returns everything should be ready to go. If I use pipeServer.WaitForConnection() everything works fine, but hanging the application if the pipe doesn't connect is not an option.

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• XmlSerializer one Class that has multiple classes properties

  - by pee2002

  Hi there! Objective: Serialize all the public properties of the ClassMain: public class ClassMain { ClassA classA = new ClassA(); public ClassMain() { classA.Prop1 = "Prop1"; classA.Prop2 = "Prop2"; } public string Prop1 { get; set; } public string Prop2 { get; set; } public ClassA ClassA { get { return classA; } } } ClassA: public class ClassA { public string Prop1 { get; set; } public string Prop2 { get; set; } } This is how i´m serializing: private void button1_Click(object sender, EventArgs e) { ClassMain classMain = new ClassMain(); classMain.Prop1 = "Prop1"; classMain.Prop2 = "Prop2"; XmlSerializer mySerializer = new XmlSerializer(typeof(ClassMain)); StreamWriter myWriter = new StreamWriter("xml1.xml"); mySerializer.Serialize(myWriter, classMain); myWriter.Close(); } In this case, the xml output is: <?xml version="1.0" encoding="utf-8"?> <ClassMain xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <Prop1>Prop1</Prop1> <Prop2>Prop2</Prop2> </ClassMain> As you see, is lacking the ClassA properties. Can anyone help me out? Regards

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