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  • ASP User Control Issue

    - by Steven
    I am attempting to construct my own date picker using code from several sources. Why won't the calendar hide when visible? myDate.ascx <%@ Control Language="vb" AutoEventWireup="false" CodeBehind="myDate.ascx.vb" Inherits="Website.myDate" %> <asp:TextBox ID="dateText" runat="server" > </asp:TextBox> <asp:Button ID="dateBtn" runat="server" UseSubmitBehavior="false" Text="x" /> <asp:Calendar ID="dateCal" runat="server" ></asp:Calendar> myDate.ascx.vb Partial Public Class myDate Inherits System.Web.UI.UserControl Protected Sub dateCal_SelectionChanged(ByVal sender As Object, ByVal e As EventArgs) Handles dateCal.SelectionChanged dateText.Text = dateCal.SelectedDate ' Update text box' dateCal.Visible = False ' Hide calendar' End Sub Protected Sub dateCal_VisibleMonthChanged(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.MonthChangedEventArgs) Handles dateCal.VisibleMonthChanged dateCal.Visible = True ' For some reason, changing the month hides the calendar (so show it)' End Sub Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load dateCal.Visible = False ' Hide calendar on load' End Sub Protected Sub dateBtn_Click(ByVal sender As Object, ByVal e As EventArgs) Handles dateBtn.Click dateCal.Visible = Not dateCal.Visible ' On button press, toggle visibility' End Sub End Class

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  • Why can't I use __getattr__ with Django models?

    - by Joshmaker
    I've seen examples online of people using __getattr__ with Django models, but whenever I try I get errors. (Django 1.2.3) I don't have any problems when I am using __getattr__ on normal objects. For example: class Post(object): def __getattr__(self, name): return 42 Works just fine... >>> from blog.models import Post >>> p = Post() >>> p.random 42 Now when I try it with a Django model: from django.db import models class Post(models.Model): def __getattr__(self, name): return 42 And test it on on the interpreter: >>> from blog.models import Post >>> p = Post() ERROR: An unexpected error occurred while tokenizing input The following traceback may be corrupted or invalid The error message is: ('EOF in multi-line statement', (6, 0)) --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /Users/josh/project/ in () /Users/josh/project/lib/python2.6/site-packages/django/db/models/base.pyc in init(self, *args, **kwargs) 338 if kwargs: 339 raise TypeError("'%s' is an invalid keyword argument for this function" % kwargs.keys()[0]) -- 340 signals.post_init.send(sender=self.class, instance=self) 341 342 def repr(self): /Users/josh/project/lib/python2.6/site-packages/django/dispatch/dispatcher.pyc in send(self, sender, **named) 160 161 for receiver in self._live_receivers(_make_id(sender)): -- 162 response = receiver(signal=self, sender=sender, **named) 163 responses.append((receiver, response)) 164 return responses /Users/josh/project/python2.6/site-packages/photologue/models.pyc in add_methods(sender, instance, signal, *args, **kwargs) 728 """ 729 if hasattr(instance, 'add_accessor_methods'): -- 730 instance.add_accessor_methods() 731 732 # connect the add_accessor_methods function to the post_init signal TypeError: 'int' object is not callable Can someone explain what is going on? EDIT: I may have been too abstract in the examples, here is some code that is closer to what I actually would use on the website: class Post(models.Model): title = models.CharField(max_length=255) slug = models.SlugField() date_published = models.DateTimeField() content = RichTextField('Content', blank=True, null=True) # Etc... Class CuratedPost(models.Model): post = models.ForeignKey('Post') position = models.PositiveSmallIntegerField() def __getattr__(self, name): ''' If the user tries to access a property of the CuratedPost, return the property of the Post instead... ''' return self.post.name # Etc... While I could create a property for each attribute of the Post class, that would lead to a lot of code duplication. Further more, that would mean anytime I add or edit a attribute of the Post class I would have to remember to make the same change to the CuratedPost class, which seems like a recipe for code rot.

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  • Is it approproate it use django signals withing the same app

    - by Alex Lebedev
    Trying to add email notification to my app in the cleanest way possible. When certain fields of a model change, app should send a notification to a user. Here's my old solution: from django.contrib.auth import User class MyModel(models.Model): user = models.ForeignKey(User) field_a = models.CharField() field_b = models.CharField() def save(self, *args, **kwargs): old = self.__class__.objects.get(pk=self.pk) if self.pk else None super(MyModel, self).save(*args, **kwargs) if old and old.field_b != self.field_b: self.notify("b-changed") # Sevelar more events here # ... def notify(self, event) subj, text = self._prepare_notification(event) send_mail(subj, body, settings.DEFAULT_FROM_EMAIL, [self.user.email], fail_silently=True) This worked fine while I had one or two notification types, but after that just felt wrong to have so much code in my save() method. So, I changed code to signal-based: from django.db.models import signals def remember_old(sender, instance, **kwargs): """pre_save hanlder to save clean copy of original record into `old` attribute """ instance.old = None if instance.pk: try: instance.old = sender.objects.get(pk=instance.pk) except ObjectDoesNotExist: pass def on_mymodel_save(sender, instance, created, **kwargs): old = instance.old if old and old.field_b != instance.field_b: self.notify("b-changed") # Sevelar more events here # ... signals.pre_save.connect(remember_old, sender=MyModel, dispatch_uid="mymodel-remember-old") signals.post_save.connect(on_mymodel_save, sender=MyModel, dispatch_uid="mymodel-on-save") The benefit is that I can separate event handlers into different module, reducing size of models.py and I can enable/disable them individually. The downside is that this solution is more code and signal handlers are separated from model itself and unknowing reader can miss them altogether. So, colleagues, do you think it's worth it?

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  • C# graphics flickering

    - by David
    Hello, I am working on kind of drawing program but I have a problem with flickering while moving a mouse cursor while drawing a rubberband line. I hope you can help me to remove that flickering of line, here is the code: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace GraphicsTest { public partial class Form1 : Form { int xFirst, yFirst; Bitmap bm = new Bitmap(1000, 1000); Graphics bmG; Graphics xG; Pen pen = new Pen(Color.Black, 1); bool draw = false; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { bmG = Graphics.FromImage(bm); xG = this.CreateGraphics(); bmG.Clear(Color.White); } private void Form1_MouseDown(object sender, MouseEventArgs e) { xFirst = e.X; yFirst = e.Y; draw = true; } private void Form1_MouseUp(object sender, MouseEventArgs e) { bmG.DrawLine(pen, xFirst, yFirst, e.X, e.Y); draw = false; xG.DrawImage(bm, 0, 0); } private void Form1_MouseMove(object sender, MouseEventArgs e) { if (draw) { xG.DrawImage(bm, 0, 0); xG.DrawLine(pen, xFirst, yFirst, e.X, e.Y); } } private void Form1_Paint(object sender, PaintEventArgs e) { xG.DrawImage(bm, 0, 0); } } }

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  • Execption Error in c#

    - by Kumu
    using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; using System.Runtime.Serialization.Formatters.Binary; namespace FoolballLeague { public partial class MainMenu : Form { FootballLeagueDatabase footballLeagueDatabase; Game game; Login login; public MainMenu() { InitializeComponent(); changePanel(1); } public MainMenu(FootballLeagueDatabase footballLeagueDatabaseIn) { InitializeComponent(); footballLeagueDatabase = footballLeagueDatabaseIn; } private void Form_Loaded(object sender, EventArgs e) { } private void gameButton_Click(object sender, EventArgs e) { int option = 0; changePanel(option); } private void scoreboardButton_Click(object sender, EventArgs e) { int option = 1; changePanel(option); } private void changePanel(int optionIn) { gamePanel.Hide(); scoreboardPanel.Hide(); string title = "Football League System"; switch (optionIn) { case 0: gamePanel.Show(); this.Text = title + " - Game Menu"; break; case 1: scoreboardPanel.Show(); this.Text = title + " - Display Menu"; break; } } private void logoutButton_Click(object sender, EventArgs e) { login = new Login(); login.Show(); this.Hide(); } private void addGameButton_Click(object sender, EventArgs e) { if ((homeTeamTxt.Text.Length) == 0) MessageBox.Show("You must enter a Home Team"); else if (homeScoreUpDown.Value > 9 || homeScoreUpDown.Minimum < 0) MessageBox.Show("You must enter one digit between 0 and 9"); else if ((awayTeamTxt.Text.Length) == 0) MessageBox.Show("You must enter a Away Team"); else if (homeScoreUpDown.Value > 9 || homeScoreUpDown.Value < 0) MessageBox.Show("You must enter one digit between 0 to 9"); else { //checkGameInputFields(); game = new Game(homeTeamTxt.Text, int.Parse(homeScoreUpDown.Value.ToString()), awayTeamTxt.Text, int.Parse(awayScoreUpDown.Value.ToString())); MessageBox.Show("Home Team -" + '\t' + homeTeamTxt.Text + '\t' + "and" + '\r' + "Away Team -" + '\t' + awayTeamTxt.Text + '\t' + "created"); footballLeagueDatabase.AddGame(game); //clearCreateStudentInputFields(); } } private void timer1_Tick(object sender, EventArgs e) { displayDateAndTime(); } private void displayDateAndTime() { dateLabel.Text = DateTime.Today.ToLongDateString(); timeLabel.Text = DateTime.Now.ToShortTimeString(); } private void displayResultsButton_Click(object sender, EventArgs e) { Game game = new Game(homeTeamTxt.Text, int.Parse(homeScoreUpDown.Value.ToString()), awayTeamTxt.Text, int.Parse(awayScoreUpDown.Value.ToString())); gameResultsListView.Items.Clear(); gameResultsListView.View = View.Details; ListViewItem row = new ListViewItem(); row.SubItems.Add(game.HomeTeam.ToString()); row.SubItems.Add(game.HomeScore.ToString()); row.SubItems.Add(game.AwayTeam.ToString()); row.SubItems.Add(game.AwayScore.ToString()); gameResultsListView.Items.Add(row); } private void displayGamesButton_Click(object sender, EventArgs e) { Game game = new Game("Home", 2, "Away", 4);//homeTeamTxt.Text, int.Parse(homeScoreUpDown.Value.ToString()), awayTeamTxt.Text, int.Parse(awayScoreUpDown.Value.ToString())); modifyGamesListView.Items.Clear(); modifyGamesListView.View = View.Details; ListViewItem row = new ListViewItem(); row.SubItems.Add(game.HomeTeam.ToString()); row.SubItems.Add(game.HomeScore.ToString()); row.SubItems.Add(game.AwayTeam.ToString()); row.SubItems.Add(game.AwayScore.ToString()); modifyGamesListView.Items.Add(row); } } } This is the whole code and I got same error like previous question. Unhandled Execption has occuredin you application.If you click...............click Quit.the application will close immediately. Object reference not set to an instance of an object. And the following details are in the error message. See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ***** Exception Text ******* System.NullReferenceException: Object reference not set to an instance of an object. at FoolballLeague.MainMenu.addGameButton_Click(Object sender, EventArgs e) in C:\Users\achini\Desktop\FootballLeague\FootballLeague\MainMenu.cs:line 91 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) ***** Loaded Assemblies ******* mscorlib Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll ---------------------------------------- FootballLeague Assembly Version: 1.0.0.0 Win32 Version: 1.0.0.0 CodeBase: file:///C:/Users/achini/Desktop/FootballLeague/FootballLeague/bin/Debug/FootballLeague.exe ---------------------------------------- System.Windows.Forms Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll ---------------------------------------- System Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll ---------------------------------------- System.Drawing Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll ---------------------------------------- System.Configuration Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll ---------------------------------------- System.Xml Assembly Version: 2.0.0.0 Win32 Version: 2.0.50727.4927 (NetFXspW7.050727-4900) CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll ***** JIT Debugging ******* To enable just-in-time (JIT) debugging, the .config file for this application or computer (machine.config) must have the jitDebugging value set in the system.windows.forms section. The application must also be compiled with debugging enabled. For example: When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box. I need to add the games to using the addGameButton and the save those added games and display them in the list view (gameResultsListView). Now I can added a game and display in the list view.But when I pressed the button addGameButton I got the above error message. If you can please give me a solution to this problem.

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  • global asax error

    - by asksuperuser
    I've suddenly got this error: Server Error in '/' Application. Parser Error Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately. Parser Error Message: Could not load type 'MyApp.Global'. Source Error: Line 1: <%@ Application Codebehind="Global.asax.cs" Inherits="MyApp.Global" Language="C#" %> Source File: /global.asax Line: 1 Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1 I have not done anything to Global.asax. I tried to change the namespace from MyFramework to MyApp but It didn't work either so I put it back like it is below: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Security; using System.Web.SessionState; namespace MyFramework { public class Global : System.Web.HttpApplication { void Application_Start(object sender, EventArgs e) { // Code that runs on application startup } void Application_End(object sender, EventArgs e) { // Code that runs on application shutdown } void Application_Error(object sender, EventArgs e) { // Code that runs when an unhandled error occurs } void Session_Start(object sender, EventArgs e) { // Code that runs when a new session is started } void Session_End(object sender, EventArgs e) { // Code that runs when a session ends. // Note: The Session_End event is raised only when the sessionstate mode // is set to InProc in the Web.config file. If session mode is set to StateServer // or SQLServer, the event is not raised. } } }

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  • Objective C IBOutlets

    - by Alan
    In cases where multiple buttons call an IBOutlet, can the IBOutlet determine which button was pressed? edit: All fixed and wired up. key point: Object ID is not sender tag! Tag is a standalone value on the first page of the attributes. - (IBAction)buttonPressed:(id)sender { switch ( [sender tag] ) { case 109: NSLog(@"Button 1"); break; case 108: NSLog(@"Button 2"); break; } }

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  • -(void)... does not work/appeal (iOS)

    - by user1012535
    Hi I've got a problem with my -(void) in my Xcode project for iOS. First of all here is the code ViewController.h #import <UIKit/UIKit.h> @interface ViewController : UIViewController { IBOutlet UIWebView *webview; IBOutlet UIActivityIndicatorView *active; UIAlertView *alert_start; UIAlertView *alert_error; } -(IBAction)tele_button:(id)sender; -(IBAction)mail_button:(id)sender; -(IBAction)web_button:(id)sender; -(IBAction)news_button:(id)sender; @end ViewController.m #import "ViewController.h" @implementation ViewController - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } #pragma mark - View lifecycle - (void)viewDidLoad { [super viewDidLoad]; //Stop Bounce for WebView for (id subview in webview.subviews) if ([[subview class] isSubclassOfClass: [UIScrollView class]]) ((UIScrollView *)subview).bounces = NO; //First Start Alert [alert_start show]; NSLog(@"first alert"); NSString *start_alert = [[NSUserDefaults standardUserDefaults] objectForKey:@"alert_start"]; if(start_alert == nil) { [[NSUserDefaults standardUserDefaults] setValue:@"1" forKey:@"alert_start"]; [[NSUserDefaults standardUserDefaults] synchronize]; UIAlertView *alert_start = [[UIAlertView alloc] initWithTitle:@"iOptibelt" message:@"On some points this application need a internet connection." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert_start show]; [alert_start release]; } // Do any additional setup after loading the view, typically from a nib. [webview loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"home-de" ofType:@"html"]isDirectory:NO]]]; NSLog(@"webview fertig"); } -(void)webViewDidStartLoad:(UIWebView *) webview { [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [active startAnimating]; NSLog(@"lade"); } -(void)webViewDidFinishLoad:(UIWebView *) webview { [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; [active stopAnimating]; NSLog(@"fertig"); } -(void)webView: (UIWebView *) webview didFailLoadWithError:(NSError *)error{ NSLog(@"lade error"); UIAlertView *alert_error = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Can't connect. Please check your internet Connection" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert_error show]; [alert_error release]; }; - (IBAction)tele_button:(id)sender{ NSLog(@"it's connected!"); //Local HTML Call Button NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"phone" ofType:@"html"]isDirectory:NO]]; [webview loadRequest:theRequest]; } - (IBAction)mail_button:(id)sender{ NSLog(@"it's connected!"); //Mail App Mail Button [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://[email protected]"]]; } - (IBAction)web_button:(id)sender{ NSLog(@"it's connected!"); //Local HTML Button NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString: @"http://optibelt.com"]]; [webview loadRequest:theRequest]; } - (IBAction)news_button:(id)sender{ NSLog(@"it's connected!"); //local Home Button NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"home-de" ofType:@"html"]isDirectory:NO]]; [webview loadRequest:theRequest]; } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; } - (void)viewWillDisappear:(BOOL)animated { [super viewWillDisappear:animated]; } - (void)viewDidDisappear:(BOOL)animated { [super viewDidDisappear:animated]; } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } @end At last my 3. -(void) does not work and i ve no more idea what could be the problem.... -(void)webViewDidStartLoad:(UIWebView *) webview { [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [active startAnimating]; NSLog(@"lade"); } -(void)webViewDidFinishLoad:(UIWebView *) webview { [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; [active stopAnimating]; NSLog(@"fertig"); } -(void)webView: (UIWebView *) webview didFailLoadWithError:(NSError *)error{ NSLog(@"lade error"); UIAlertView *alert_error = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Can't connect. Please check your internet Connection" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert_error show]; [alert_error release];

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  • A ResetBindings on a BindingSource of a Grid also resets ComboBox

    - by Tetsuo
    Hi there, I have a DataGridView with a BindingSource of products. This products have an enum (Producer). For the most text fields (to edit the product) below the DataGridView I have a method RefreshProduct which does a ResetBindings in the end to refresh the DataGridView. There is a ComboBox (cboProducer), too. If I run over the _orderBs.ResetBindings(false) it will reset my cboProducer outside the DataGridView, too. Could you please help me to avoid this? Here follows some code; maybe it is then better to understand. public partial class SelectProducts : UserControl { private AutoCompleteStringCollection _productCollection; private ProductBL _productBL; private OrderBL _orderBL; private SortableBindingList<ProductBE> _listProducts; private ProductBE _selectedProduct; private OrderBE _order; BindingSource _orderBs = new BindingSource(); public SelectProducts() { InitializeComponent(); if (_productBL == null) _productBL = new ProductBL(); if (_orderBL == null) _orderBL = new OrderBL(); if (_productCollection == null) _productCollection = new AutoCompleteStringCollection(); if (_order == null) _order = new OrderBE(); if (_listProducts == null) { _listProducts = _order.ProductList; _orderBs.DataSource = _order; grdOrder.DataSource = _orderBs; grdOrder.DataMember = "ProductList"; } } private void cmdGetProduct_Click(object sender, EventArgs e) { ProductBE product = _productBL.Load(txtProductNumber.Text); _listProducts.Add(product); _orderBs.ResetBindings(false); } private void grdOrder_SelectionChanged(object sender, EventArgs e) { if (grdOrder.SelectedRows.Count > 0) { _selectedProduct = (ProductBE)((DataGridView)(sender)).CurrentRow.DataBoundItem; if (_selectedProduct != null) { txtArticleNumber.Text = _selectedProduct.Article; txtPrice.Text = _selectedProduct.Price.ToString("C"); txtProducerNew.Text = _selectedProduct.ProducerText; cboProducer.DataSource = Enum.GetValues(typeof(Producer)); cboProducer.SelectedItem = _selectedProduct.Producer; } } } private void txtProducerNew_Leave(object sender, EventArgs e) { string property = CommonMethods.GetPropertyName(() => new ProductBE().ProducerText); RefreshProduct(((TextBoxBase)sender).Text, property); } private void RefreshProduct(object value, string property) { if (_selectedProduct != null) { double valueOfDouble; if (double.TryParse(value.ToString(), out valueOfDouble)) { value = valueOfDouble; } Type type = _selectedProduct.GetType(); PropertyInfo info = type.GetProperty(property); if (info.PropertyType.BaseType == typeof(Enum)) { value = Enum.Parse(info.PropertyType, value.ToString()); } try { Convert.ChangeType(value, info.PropertyType, new CultureInfo("de-DE")); info.SetValue(_selectedProduct, value, null); } catch (Exception ex) { throw new WrongFormatException("\"" + value.ToString() + "\" is not a valid value.", ex); } var produktFromList = _listProducts.Single(p => p.Position == _selectedProduct.Position); info.SetValue(produktFromList, value, null); _orderBs.ResetBindings(false); } } private void cboProducer_SelectedIndexChanged(object sender, EventArgs e) { var selectedIndex = ((ComboBox)(sender)).SelectedIndex; switch ((Producer)selectedIndex) { case Producer.ABC: txtProducerNew.Text = Constants.ABC; break; case Producer.DEF: txtProducerNew.Text = Constants.DEF; break; case Producer.GHI: txtProducerNew.Text = Constants.GHI; break; case Producer.Another: txtProducerNew.Text = String.Empty; break; default: break; } string property = CommonMethods.GetPropertyName(() => new ProductBE().Producer); RefreshProduct(selectedIndex, property); } }

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  • delete in tableView..

    - by totato
    I just add this methods in .h file : - (IBAction)EditTable:(id)sender; - (IBAction)DeleteButtonAction:(id)sender; and in .m file : (IBAction)DeleteButtonAction:(id)sender{ [tableList removeLastObject]; [Table reloadData]; } (IBAction) EditTable:(id)sender{ if(self.editing) { [super setEditing:NO animated:NO]; [Table setEditing:NO animated:NO]; [Table reloadData]; [self.navigationItem.leftBarButtonItem setTitle:@"Edit"]; [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStylePlain]; } else { [super setEditing:YES animated:YES]; [Table setEditing:YES animated:YES]; [Table reloadData]; [self.navigationItem.leftBarButtonItem setTitle:@"Done"]; [self.navigationItem.leftBarButtonItem setStyle:UIBarButtonItemStyleDone]; } } when I run the program and click the delete button (red button) the program is stop ! whats the problem ? please any help ?

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  • give control in datalist color

    - by KareemSaad
    I had datalist as menu that display categories and subs and I want to give red color or css for the selected item(category or sub) I tried but I had a problem This is my code private Label Lb; protected void Page_Load(object sender, EventArgs e) { } protected void dlCategory_ItemDataBound(object sender, DataListItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { Lb = (Label)e.Item.FindControl("LblCat"); } } protected void dlCategory_SelectedIndexChanged(object sender, EventArgs e) { Lb.ForeColor = System.Drawing.Color.Red; } }

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  • How to get mouseposition when context menu appears?

    - by ikky
    Hi. I have a panel which holds many pictureboxes. Each picturebox has registered "contextRightMenu" as their context menu. What i want when the context menu pops up is to get the current mouseposition. I have tried getting the mouseposition by using mouseDown and click, but these events happens after one of the items of the context menu is clicked, and that is too late. the popup event of the context menu does not deliver mouse event args, so i don't know how to get the mouseposition. If i can get mouse event args it is easy. Then i just can: this.contextRightClick.Popup += new System.EventHandler(this.contextRightClick_Popup); // If EventArgs include mouseposition within the sender private void contextRightClick_Popup)(object sender, EventArgs e) { int iLocationX = sender.Location.X; int iLocationY = sender.Location.Y; Point pPosition = new Point(iLocationX + e.X, iLocationY + e.Y); // Location + position within the sender = current mouseposition } Can anyone help me either get some mouse event args, or suggest a event that will run before the contextmenu pop ups? Thanks in advance

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  • Is this a valid pattern for raising events in C#?

    - by Will Vousden
    Update: For the benefit of anyone reading this, since .NET 4, the lock is unnecessary due to changes in synchronization of auto-generated events, so I just use this now: public static void Raise<T>(this EventHandler<T> handler, object sender, T e) where T : EventArgs { if (handler != null) { handlerCopy(sender, e); } } And to raise it: SomeEvent.Raise(this, new FooEventArgs()); Having been reading one of Jon Skeet's articles on multithreading, I've tried to encapsulate the approach he advocates to raising an event in an extension method like so (with a similar generic version): public static void Raise(this EventHandler handler, object @lock, object sender, EventArgs e) { EventHandler handlerCopy; lock (@lock) { handlerCopy = handler; } if (handlerCopy != null) { handlerCopy(sender, e); } } This can then be called like so: protected virtual void OnSomeEvent(EventArgs e) { this.someEvent.Raise(this.eventLock, this, e); } Are there any problems with doing this? Also, I'm a little confused about the necessity of the lock in the first place. As I understand it, the delegate is copied in the example in the article to avoid the possibility of it changing (and becoming null) between the null check and the delegate call. However, I was under the impression that access/assignment of this kind is atomic, so why is the lock necessary? Update: With regards to Mark Simpson's comment below, I threw together a test: static class Program { private static Action foo; private static Action bar; private static Action test; static void Main(string[] args) { foo = () => Console.WriteLine("Foo"); bar = () => Console.WriteLine("Bar"); test += foo; test += bar; test.Test(); Console.ReadKey(true); } public static void Test(this Action action) { action(); test -= foo; Console.WriteLine(); action(); } } This outputs: Foo Bar Foo Bar This illustrates that the delegate parameter to the method (action) does not mirror the argument that was passed into it (test), which is kind of expected, I guess. My question is will this affect the validity of the lock in the context of my Raise extension method? Update: Here is the code I'm now using. It's not quite as elegant as I'd have liked, but it seems to work: public static void Raise<T>(this object sender, ref EventHandler<T> handler, object eventLock, T e) where T : EventArgs { EventHandler<T> copy; lock (eventLock) { copy = handler; } if (copy != null) { copy(sender, e); } }

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  • Accepting drag operations in an NSCollectionView subclass

    - by andyvn22
    I've subclassed NSCollectionView and I'm trying to receive dragged files from the Finder. I'm receiving draggingEntered: and returning an appropriate value, but I'm never receiving prepareForDragOperation: (nor any of the methods after that in the process). Is there something obvious I'm missing here? Code: - (void)awakeFromNib { [self registerForDraggedTypes:[NSArray arrayWithObjects:NSFilenamesPboardType, nil]]; } - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender { NSLog(@"entered"); //Happens NSPasteboard *pboard; NSDragOperation sourceDragMask; sourceDragMask = [sender draggingSourceOperationMask]; pboard = [sender draggingPasteboard]; if ([[pboard types] containsObject:NSFilenamesPboardType]) { NSLog(@"copy"); //Happens return NSDragOperationCopy; } return NSDragOperationNone; } - (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender { NSLog(@"prepare"); //Never happens return YES; }

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  • Problem about socket communication

    - by Ahmet Altun
    I have two separate socket projects in VS.NET. One of them is sender, other one is receiver. After starting receiver, i send data from sender. Although send method returns 13 bytes as successfully transferred, the receiver receives 0 (zero). The receiver accepts sender socket and listens to it. But cannot receive data. Why? P.S. : If sender code is put in receiver project, receiver can get data, as well.

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  • How can I ignore an http request without clearing the browser?

    - by Timid Developer
    To prevent duplicate requests (i.e. pressing F5 right after clicking a command button), I've setup my page base class to ignore the request if it's detected as a duplicate. When I say 'ignore' I mean Response.End() Now I thought I've seen this work before, where there's an issue, I just Response.End() and the users page just does nothing. I don't know the exact circumstance in which this worked, but I'm unable to repeat it now. Now when I call Response.End(), I just get an empty browser. More specifically, I get this html. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=utf-8"></HEAD> <BODY></BODY></HTML> I setup the following test app to confirm the problem is not elsewhere in my app. Here it is: Add the following to an aspx form <asp:Label ID="lbl" Text="0" runat="server" /><br /> <asp:Button ID="btnAdd1" Text="Add 1" runat="server" /><br /> <asp:Button ID="btnAdd2" Text="Add 2" runat="server" /><br /> <asp:Button ID="btnAdd3" Text="Add 3" runat="server" /><br /> And here's the code behind file using System; namespace TestDupRequestCancellation { public partial class _Default : System.Web.UI.Page { protected void Page_Init(object sender, EventArgs e) { btnAdd1.Click += btnAdd1_Click; btnAdd2.Click += btnAdd2_Click; btnAdd3.Click += btnAdd3_Click; } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) CurrentValue = 0; else if (Int32.Parse(lbl.Text) != CurrentValue) Response.End(); } protected void Page_PreRender(object sender, EventArgs e) { lbl.Text = CurrentValue.ToString(); } protected int CurrentValue { get { return Int32.Parse(Session["CurrentValue"].ToString()); } set { Session["CurrentValue"] = value.ToString(); } } void btnAdd3_Click(object sender, EventArgs e) { CurrentValue += 3; } void btnAdd2_Click(object sender, EventArgs e) { CurrentValue += 2; } void btnAdd1_Click(object sender, EventArgs e) { CurrentValue += 1; } } } When you load the page, clicking any button does what is expected, but if you press F5 at any time after pressing one of the buttons, it will detect it as a duplicate request and call Response.End() which promptly ends the task. Which leaves the user with an empty browser. Is there anyway to leave the user with the page as it was, so they can just click a button? Also; please note that this code is the simplest code I could come up with to demonstrate my problem. It's not meant to demonstrate how to check for dup requests.

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  • How to raise a validation event from a key press

    - by flavour404
    Hi, I want to raise the: private void txtbox_startdate_Validating(object sender, System.ComponentModel.CancelEventArgs e) {} Function from a key leave event. The leave event looks like: private void txtbox_startdate_Leave(object sender, EventArgs e) {} The trouble is of course if I try and call it in this manner: txtbox_startdate_Validating(sender, e) An error is raised because in this case 'e' is an EventArgs whereas the validation function wants a System.ComponentModel.CancelEventArgs and so, how do I convert EventArgs to a System.ComponentModel.CancelEventArgs or create one so that I can call my validation function? Thanks, R.

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  • Press a Button and open a URL in another ViewController

    - by Dennis Borup Jakobsen
    I am trying to learn Xcode by making a simple app. But I been looking on the net for hours (days) and I cant figure it out how I make a button that open a UIWebView in another ViewController :S first let me show you some code that I have ready: I have a few Buttons om my main Storyboard that each are title some country codes like UK, CA and DK. When I press one of those Buttons I have an IBAction like this: - (IBAction)ButtonPressed:(UIButton *)sender { // Google button pressed NSURL* allURLS; if([sender.titleLabel.text isEqualToString:@"DK"]) { // Create URL obj allURLS = [NSURL URLWithString:@"http://google.dk"]; }else if([sender.titleLabel.text isEqualToString:@"US"]) { allURLS = [NSURL URLWithString:@"http://google.com"]; }else if([sender.titleLabel.text isEqualToString:@"CA"]) { allURLS = [NSURL URLWithString:@"http://google.ca"]; } NSURLRequest* req = [NSURLRequest requestWithURL:allURLS]; [myWebView loadRequest:req]; } How do I make this open UIWebview on my other Viewcontroller named myWebView? please help a lost man :D

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  • The type or namespace cannot be found (are you missing a using directive or an assembly reference?)

    - by Kumu
    I get the following error when I try to compile my C# program: The type or namespace name 'Login' could not be found (are you missing a using directive or an assembly reference?) using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace FootballLeague { public partial class MainMenu : Form { FootballLeagueDatabase footballLeagueDatabase; Game game; Team team; Login login; //Error here public MainMenu() { InitializeComponent(); changePanel(1); } public MainMenu(FootballLeagueDatabase footballLeagueDatabaseIn) { InitializeComponent(); footballLeagueDatabase = footballLeagueDatabaseIn; } private void Form_Loaded(object sender, EventArgs e) { } private void gameButton_Click(object sender, EventArgs e) { int option = 0; changePanel(option); } private void scoreboardButton_Click(object sender, EventArgs e) { int option = 1; changePanel(option); } private void changePanel(int optionIn) { gamePanel.Hide(); scoreboardPanel.Hide(); string title = "Football League System"; switch (optionIn) { case 0: gamePanel.Show(); this.Text = title + " - Game Menu"; break; case 1: scoreboardPanel.Show(); this.Text = title + " - Display Menu"; break; } } private void logoutButton_Click(object sender, EventArgs e) { login = new Login(); login.Show(); this.Hide(); } Login.cs class: using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace FootballLeagueSystem { public partial class Login : Form { MainMenu menu; public Login() { InitializeComponent(); } private void administratorLoginButton_Click(object sender, EventArgs e) { string username1 = "08247739"; string password1 = "08247739"; if ((userNameTxt.Text.Length) == 0) MessageBox.Show("Please enter your username!"); else if ((passwordTxt.Text.Length) == 0) MessageBox.Show("Please enter your password!"); else if (userNameTxt.Text.Equals("") || passwordTxt.Text.Equals("")) MessageBox.Show("Invalid Username or Password!"); else { if (this.userNameTxt.Text == username1 && this.passwordTxt.Text == password1) MessageBox.Show("Welcome Administrator!", "Administrator Login"); menu = new MainMenu(); menu.Show(); this.Hide(); } } private void managerLoginButton_Click(object sender, EventArgs e) { { string username2 = "1111"; string password2 = "1111"; if ((userNameTxt.Text.Length) == 0) MessageBox.Show("Please enter your username!"); else if ((passwordTxt.Text.Length) == 0) MessageBox.Show("Please enter your password!"); else if (userNameTxt.Text.Equals("") && passwordTxt.Text.Equals("")) MessageBox.Show("Invalid Username or Password!"); else { if (this.userNameTxt.Text == username2 && this.passwordTxt.Text == password2) MessageBox.Show("Welcome Manager!", "Manager Login"); menu = new MainMenu(); menu.Show(); this.Hide(); } } } private void cancelButton_Click(object sender, EventArgs e) { this.Close(); } } } Where is the error? What am I doing wrong?

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  • Quality of TFS 2008 merged code

    - by paologios
    Does the quality of code merged by TFS 2008 depend on the used programming language? I know merging in Java / Subversion, and merging a branch to its trunk usually does not create much conflicts. Now in my company, we use VB.NET. When I merge two files TFS does not always get code blocks right, e.g. does not find the right If..then / end if lines. To give you an example, I mean: File 2 is created as a branch of File 1. Both files were changed later, now I'm going to merge those files and am recieving conficts: The marked end-if lines (1) are detected as corresponding, meaning the added event handler Button1_Click is being deleted. Now I wonder if this behavior is by language (C# vs. VB.NET) or are other source control solutions just better than TFS? (And I really liked TFS up to now :) ) File 1: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Page.IsPostBack Then Label1.Text = "Hello" Label2.Text = "World" End If End Sub Protected Sub Button2_Click(ByVal sender, ByVal e as System.EventArgs) Handles Button2.Click // .... If Page.IsValid Then Label3.Text = "Hello Button 2" End If // .... End Sub File 2 (Branch of File 1): Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Page.IsPostBack Then fillTableFromDatabase() End If // (1) End Sub Protected Sub Button1_Click(ByVal sender, ByVal e as System.EventArgs) Handles Button1.Click // do something here End Sub Protected Sub Button2_Click(ByVal sender, ByVal e as System.EventArgs) Handles Button2.Click // .... If Page.IsValid Then End If // (1) // .... End Sub

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  • PhotoChooserTask + Navigation.

    - by user562405
    I taken two Images & added event (MouseButtonDown) for them. When first image handles event to open Gallery. Second image handles events for open camera. When user has choosed his image from the gallery, I want to navigate to next page. Its navigates. But before completing navigation process, it displays MainPage & then moves toward next page. I didnt want to display the MainPage once user chooses the image from the gallery. Plz help. Thanks in advance. public partial class MainPage : PhoneApplicationPage { PhotoChooserTask objPhotoChooser; CameraCaptureTask cameraCaptureTask; // Constructor public MainPage() { InitializeComponent(); objPhotoChooser = new PhotoChooserTask(); objPhotoChooser.Completed += new EventHandler<PhotoResult>(objPhotoChooser_Completed); cameraCaptureTask = new CameraCaptureTask(); cameraCaptureTask.Completed += new EventHandler<PhotoResult>(objCameraCapture_Completed); } void objPhotoChooser_Completed(object sender, PhotoResult e) { if (e != null && e.TaskResult == TaskResult.OK) { //Take JPEG stream and decode into a WriteableBitmap object App.CapturedImage = PictureDecoder.DecodeJpeg(e.ChosenPhoto); //Delay navigation until the first navigated event NavigationService.Navigated += new NavigatedEventHandler(navigateCompleted); } } void navigateCompleted(object sender, EventArgs e) { //Do the delayed navigation from the main page this.NavigationService.Navigate(new Uri("/ImageViewer.xaml", UriKind.RelativeOrAbsolute)); NavigationService.Navigated -= new NavigatedEventHandler(navigateCompleted); } void objCameraCapture_Completed(object sender, PhotoResult e) { if (e.TaskResult == TaskResult.OK) { //Take JPEG stream and decode into a WriteableBitmap object App.CapturedImage = PictureDecoder.DecodeJpeg(e.ChosenPhoto); //Delay navigation until the first navigated event NavigationService.Navigated += new NavigatedEventHandler(navigateCompleted); } } protected override void OnBackKeyPress(System.ComponentModel.CancelEventArgs e) { e.Cancel = true; } private void image1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { objPhotoChooser.Show(); } private void image2_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { cameraCaptureTask.Show(); }

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  • Preselection in the save dialog (c#)

    - by FullmetalBoy
    Goal: Save a notepad file in the computer. (C#) Problem: I don't know how to make a preselection as "TXT Files(*.txt)" in the "Save as type:" when save dialog display? // Fullmetalboy using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.IO; namespace Labb2_application { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } private void mnuFileOpen_Click(object sender, EventArgs e) { OpenFileDialog fDialog = new OpenFileDialog(); fDialog.Title = "Öppna"; fDialog.Filter = "Text files|*.txt"; fDialog.InitialDirectory = @"C:\Windows"; fDialog.ShowHelp = true; DialogResult result = fDialog.ShowDialog(); // Show the dialog and get result. if (result == DialogResult.OK) { string fileAdress = fDialog.FileName; try { string textContent = File.ReadAllText(fileAdress); rtxtDisplay.Text = textContent; } catch (IOException) { } } // If syntax } private void mnuFileSave_Click(object sender, EventArgs e) { saveAsFileDialog.ShowDialog(); } private void mnuFileSaveAs_Click(object sender, EventArgs e) { saveAsFileDialog.Filter = "Text files|*.txt"; saveAsFileDialog.ShowDialog(); } private void mnuFileExit_Click(object sender, EventArgs e) { Application.Exit(); } private void saveAsFileDialog_FileOk(object sender, CancelEventArgs e) { string fileNameAddress = saveAsFileDialog.FileName; File.WriteAllText(fileNameAddress, rtxtDisplay.Text); } } // Partial Class }

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  • .NET 2.0: Invoking Methods Using Reflection And Generics Causes Exception

    - by David Derringer
    Hi all, I'm new to Stack Overflow, so forgive me. I've just started transititoning over to C# and I am stuck on a problem. I am wanting to pass a generic class in and call a method from that class. So, my code looks as such: public void UpdateRecords<T>(T sender) where T : new() //where T: new() came from Resharper { Type foo = Type.GetType(sender.GetType().ToString()); object[] userParameters = new object[2]; userParameters[0] = x; userParameters[1] = y; sender = new T(); //This was to see if I could solve my exception problem MethodInfo populateRecord = foo.GetMethod("MethodInOtherClass"); populateMethod.Invoke(sender, userParameters); } Exception thrown: "Object reference not set to an instance of an object." Again, I really apologize, as I am nearly brand new to C# and this is the first time I've ever handled reflection and generics. Thank you!

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  • Object reference not set to an instance of an object.....?

    - by jamal
    Hi guys I always got this error from my site and it keeps bugging me.I've been trying to figure out the cause of this error but I can't really figure it out. Here's the stacktrace: at BasePage.Page_PreInit(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Web.UI.Page.OnPreInit(EventArgs e) at System.Web.UI.Page.PerformPreInit() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) And on my basepage I only got this code: Imports Microsoft.VisualBasic Public Class BasePage Inherits System.Web.UI.Page Private Sub Page_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit Page.Theme = "Something" If (Request.UserAgent.IndexOf("AppleWebKit") 0) Then Request.Browser.Adapters.Clear() End If End Sub Private Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender If Me.Title = "Untitled Page" Then Throw New Exception("Page title cannot be ""Untitled Page"".") End If End Sub End Class According to the stacktrace this always happens on my basepage preinit event.What do you think is the problem here guys?

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  • Value from UISlider method?

    - by fuzzygoat
    Can anyone point me in the right direction regarding sliders, the version below was my first attempt (the range is 0.0 - 100.0) The results I get are not right. // Version 1.0 -(IBAction)sliderMoved:(id)sender { NSLog(@"SliderValue ... %d",(int)[sender value]); } // OUTPUT: // [1845:207] SliderMoved ... -1.991753 // [1845:207] SliderMoved ... 0.000000 // [1845:207] SliderMoved ... 0.000000 // [1845:207] SliderMoved ... 32768.000435 With the version below I get the values I expect, what am I missing in version_001? // Version 2.0 -(IBAction)sliderMoved:(UISlider *)sender { NSLog(@"SliderValue ... %d",(int)[sender value]); } // OUTPUT: // [1914:207] SliderMoved ... 1 // [1914:207] SliderMoved ... 2 // [1914:207] SliderMoved ... 3 // [1914:207] SliderMoved ... 4 cheers Gary

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