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  • Silverlight DataGrid refresh problem

    - by Krimson
    Hi, I have encountered a problem when I refresh the observable collection behind my Silverlight DataGrid (the DataGrid binds to a PagedCollectionView with an ObservableCollection as source). When I clear the observable collection and add the new items to the collection the DataGrid repositions to the top. I want the DataGrid to keep the scroll position. This seems to somewhat happen if I remove the items in the collection one-by-one with the RemoveAt mehtod and the add the new items one-by-one. But why is there this difference between removing all the items at once with the Clear method and removing the items one-by-one with the RemoveAt method? Best Regards, Jesper

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  • C# Pragma to suppress break on thrown error

    - by Courtney de Lautour
    First off I run my applications with exceptions thrown on any error (handled or not). Second I am using a TypeConverter to convert from a user input string to the actual object. Third TypeConverter offers no TryConvert method so I'm stuck using exceptions for validation, using this rather ugly bit of code here: try { this._newValue = null; #pragma Magic_SuppressBreakErrorThrown System.Exception this._newValue = this.Converter.ConvertFromString(this._textBox.Text); #pragma Magic_ResumeBreakErrorThrown System.Exception this.HideInvalidNotification(); } catch (Exception exception) { if (exception.InnerException is FormatException) { this.ShowInvalidNotification(this._textBox.Text); } else { throw; } } I'm finding it rather distracting to have VS break execution every-time I type the - of -1, or some other invalid character. I could use something similar to this but not all the types I'm converting to have a TryParse method either. I'm hoping there may be some way to disable breaking for the section of code within the try without changing my exception settings.

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  • How to determine MS Access field size via OleDb

    - by Andy
    The existing application is in C#. During startup the application calls a virtual method to make changes to the database (for example a new revision may need to calculate a new field or something). An open OleDb connection is passed into the method. I need to change a field width. The ALTER TABLE statement is working fine. But I would like to avoid executing the ALTER TABLE statement if the field is already the appropriate size. Is there a way to determine the size of an MS Access field using the same OleDb connection?

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  • java httpclient post

    - by Eric V
    Hi, I have a question about how to allow my jsp page to issue a post command to the server, and still have the browser fallow the re direction of the posted page. Here are the code snipets: code that does the post (this is inside a jsp file): HttpClient client = new DefaultHttpClient(); client.getParams().setParameter("SUBMITTED", "submitted"); client.getParams().setParameter("xxxxxxxx", purchaser.getemail()); client.getParams().setParameter("xxxxxxxx", purchaser.getsuject()); HttpPost method = new HttpPost(url+"process.jsp"); client.execute(method); here is a snipet of process.jsp if (person.getStatus() == person.ACTIVE) response.sendRedirect("Account.jsp); else if (person.getStatus() == person.ERROR) response.sendRedirect("Error.jsp); I would like the browser to the fallow/goto the redirect from the process.jsp. Does anyone know a tutorial that would help me or Am I going about this the wrong way. Thanks, eric

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  • Using .net 3.5 assemblies in asp.net 2.0 web application

    - by masterik
    I have an .net assembly build against 3.5 framework. This assembly has a class Foo with two method overrides: public class Foo { public T Set<T>(T value); public T Set<T>(Func<T> getValueFunc); } I'm referencing this assembly in my asp.net 2.0 web application to use first override of the Set method (without Func). But on build I get an error saying that I should reference System.Core to use System.Func delegate... but I'm not using this type... Is there a workaround to solve this? PS: There is no option to convert my web application targeting 3.5 framework.

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  • How to speed up calculation of length of longest common substring?

    - by eSKay
    I have two very large strings and I am trying to find out their Longest Common Substring. One way is using suffix trees (supposed to have a very good complexity, though a complex implementation), and the another is the dynamic programming method (both are mentioned on the Wikipedia page linked above). Using dynamic programming The problem is that the dynamic programming method has a huge running time (complexity is O(n*m), where n and m are lengths of the two strings). What I want to know (before jumping to implement suffix trees): Is it possible to speed up the algorithm if I only want to know the length of the common substring (and not the common substring itself)?

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  • Display custom error page when file upload exceeds allowed size in ASP.NET MVC2

    - by Marcus
    Hello! My main issue is that I want to display an custom error page when an uploaded file exceeds allowed size (maxRequestLength in web.config). When the big file is uploaded an HttpException is thrown before my upload action method in the controller is invoked. This is expected. I have tried to catch the exception in a custom attribute and also to override OnException in the controller. Why isnt it possible to catch the exception in either the attribute or the OnException method? Its possible though to catch the exception in Application_Error in global.asax but neither Response.Redirect nor Server.Transfer works for redirecting to the custom error page. Server.Transfer gives the "failed to process child request" error and response.redirect gives the "Http headers already sent" error. Any ideas? Thanks in advance! Marcus

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  • Control JSON Serialization format of a custom type in .NET

    - by mrjoltcola
    I have a PhoneNumber class that stores a normalized string, and I've defined implicit operators for string <- Phone to simplify treatment of the PhoneNumber as a string. I've also overridden the ToString() method to always return the cleaned version of the number (no hyphens or parentheses or spaces). In any MVC.NET code where I explicitly display the number, I can explicitly call phone.Format(). The problem here is serializing an entity that has a PhoneNumber to JSON; JavaScriptSerializer serializes it as [object Object]. I want to serialize it as a string in (555)555-5555 format. I've looked at writing a custom JavaScriptConverter, but JavaScriptConverter.Serialize() method returns a dictionary of name-value pairs. I don't want PhoneNumber to be treated as an object with fields, I want to simply serialize it as a string.

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  • Can't get NSDate to work correctly

    - by John
    Hello, having a strange issue, must be something I'm just not seeing. I set up a variable in the .h NSDate *checkIn; @property (nonatomic, retain) NSDate *checkIn; I'm setting a variable to todays date in the initWithNibName: checkIn = [NSDate date]; I also did synthesized it as well. Now later on in my program I use it to build a tablecell with the following line cell.textLabel.text = [dateFormatter stringFromDate:checkIn]; This line kills the simulator, BAD_EXEC. If I put in a checkIn = [NSDate date]; above it, it works fine. So I'm thinking the variable isn't being stored from when I set it in the initWithNibName: Not sure why though, as my strings I do the same way are all working fine from method to method. What am I missing?

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  • Split NSData objects into other NSData objects with a given size

    - by Cedric Vandendriessche
    I'm having an NSData object of approximately 1000kb big. Now I want to transfer this via bluetooth. This would be better if I have let's say 10 objects of 100kb. It comes to mind that I should use the -subdataWithRange: method of NSData. I haven't really worked with NSRange. Well I know how it works, but then to read from a given location with the length: 'to end of file'... I've no idea how to do that. Some code on how to split this into multiple 100kb NSData objects would really help me out here. (it probably involves the length method to see how many objects should be made..?) Thank you in advance.

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  • How to properly match varargs in Mockito

    - by qualidafial
    I've been trying to get to mock a method with vararg parameters using Mockito: interface A { B b(int x, int y, C... c); } A a = mock(A.class); B b = mock(B.class); when(a.b(anyInt(), anyInt(), any(C[].class))).thenReturn(b); assertEquals(b, a.b(1, 2)); This doesn't work, however if I do this instead: when(a.b(anyInt(), anyInt())).thenReturn(b); assertEquals(b, a.b(1, 2)); This works, despite that I have completely omitted the varargs argument when stubbing the method. Any clues?

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  • SignalR: hub invokation request

    - by Yuriy Pogrebnyak
    I'm writing custom SignalR client and I need to implement hub invokation. As I understood from .NET client code, I need to send post request to the following url (after establishing connection with server): http://serverurl/signalr/send?transport=serverSentEvents&connectionId=<my_connection_id> . In request body I need to send json string containing basic information about the invoked method. My question is how should this json look like? I'm trying to send smth like this (again, judging by .NET client code): {"data" : {"Hub" : "hubname", "Method" : "methodname", "Args" : {"message" : "msg"} } } But I get the following error: System.ArgumentNullException: Value cannot be null. Parameter name: s. What am I doing wrong? What are required parameters of sending json and how should it be formatted?

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  • Django Formset validation with an optional ForeignKey field

    - by Camilo Díaz
    Having a ModelFormSet built with modelformset_factory and using a model with an optional ForeignKey, how can I make empty (null) associations to validate on that form? Here is a sample code: ### model class Prueba(models.Model): cliente = models.ForeignKey(Cliente, null = True) valor = models.CharField(max_length = 20) ### view def test(request): PruebaFormSet = modelformset_factory(model = Prueba, extra = 1) if request.method == 'GET': formset = PruebaFormSet() return render_to_response('tpls/test.html', {'formset' : formset}, context_instance = RequestContext(request)) else: formset = PruebaFormSet(request.POST) # dumb tests, just to know if validating if formset.is_valid(): return HttpResponse('0') else: return HttpResponse('1') In my template, i'm just calling the {{ form.cliente }} method which renders the combo field, however, I want to be able to choose an empty (labeled "------") value, as the FK is optional... but when the form gets submitted it doesn't validate. Is this normal behaviour? How can i make this field to skip required validation?

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  • Issit possible to load a UIVIewcontroller from uiview of another UIViewController

    - by chako89
    Guys, need your advise here. I have: an UIViewController A UIView B: I added subview which is a UIView to the UIViewController A an UIViewController C What I did is: in UIViewController A's viewDidLoad's method, I call this: UIView *subviewB = [[Subview alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)]; [subviewB subviewBMethod]; // [self.view addSubview:rsubviewB]; SubviewBMethod code is to create an view, inside this view have a button. Once this button is clicked, it will change to UIViewController C. I tried this: [self presentModalViewController:self.UIViewControllerC animated:YES]; And I got this error message: warning: incompatible Objective-C types 'struct UIViewControllerC *', expected 'struct UIViewController *' when passing argument 1 of 'presentModalViewController:animated:' from distinct Objective-C type When I run the app, it terminates immediately when I click the button, I opened the console bug, there is no any error message. My method must be wrong, thus my question is: Issit possible to load a UIVIewcontroller from uiview of another UIViewController? If: Yes: How to do it? No: What should I do? THank you =)

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  • No-Model Formtastic Form

    - by Kevin Sylvestre
    I am looking to reproduce the following with Formtastic: <% form_tag '/search', :method => 'get' do %> <%= text_field_tag :q, params[:q] %> <% end %> So far I have: <% semantic_form_for :search, :html => { :method => :get } do |form| %> <% form.inputs do %> <%= form.input :q %> <% end %> <% end %> However, this requires access to the parameter hash using: params[:search][:q] Instead of my required: params[:q] I'd like to use Formtastic for all forms in the application I am working on, and so far I have only had problems with this one. Any ideas?

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  • PHP and Classes: access to parent's public property within the parent class

    - by takpar
    Hi, here is what my code looks like i have two forms: class Form_1 extends Form_Abstract { public $iId = 1; } class Form_2 extends Form_1 { public $iId = 2; } i expect the code behave like this: $oForm = new Form_2; echo $oForm->getId(); // it returns '2' echo $oForm->getParentId(); // i expect it returns '1' here is my Form_Abstract class: class Form_Abstract { public $iId = 0; public function getId() { return $this->iId; } /** this method will be called from a child instance */ public function getParentId() { return parent::$iId; } } but it throws a Fatal Error: Fatal error: Cannot access parent:: when current class scope has no parent please help me with the method getParentId()

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  • PHP4 HTTP Post without cURL

    - by Luke
    I have the following code that works on PHP5 to send a HTTP POST without using cURL. I would like this to work on PHP 4.3.0 and above: $opts = array('http' => array( 'method' => 'POST', 'header' => "Content-type: application/x-www-form-urlencoded\r\n" . "Content-Type: application/json\r\n", 'content' => $query ) ); $context = stream_context_create($opts); $result = file_get_contents($url, false, $context); HTTP context is only supported on PHP5. Is there anyway to make this work with PHP 4.3.0 - I need a fallback method if PHP5 or cURL is not installed.

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  • customize uipopovercontroller in ipad

    - by Jaimin
    i want to change the image of popover. it is having blue tint at the top so i want it to be of different color. how can i do it... - (void)presentPopoverFromRect:(CGRect)rect inView:(UIView *)view permittedArrowDirections:(UIPopoverArrowDirection)arrowDirections animated:(BOOL)animated can i do it with this method.. make my own view and place a image in that view. i read in some posts that it is not possible to change color and also i didnt fine any instance method of UIPopOverController class to do this.. thanks in advance.

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  • Checking existence of file types via extensions bash.

    - by Tommy
    Hi, I need to test if various file types exist in a directory. I've tried $ [ -f *.$fileext] where fileext is the file extension but that does not seem to work. Both of these methods work function checkext() { fileext=$1 ls *.$fileext>/dev/null 2>&1 if [ $? -eq 0 ] then echo "We have $fileext files!" else echo "We don't have any $fileext files!" fi } and function checkext2() { extention=$1 filescheck=(`ls *.$1`) len=${#filescheck[*]} if [ $len -gt 0 ] then echo "We have $extention files!" else if [ $len -eq 0 ] then echo "We don't have any $extention files!" else echo "Error" fi fi } The second method is less tidy as any ls error is shown so I prefer method 1. Could people please suggest any improvements, more elegant solutions e.t.c

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  • How i set the background color in UIView using CGContext?

    - by Rajendra Bhole
    Hi, I have developed the application in which i want to set the background color of UIView which is already set on UIViewController.The code is below, @implementation frmGraphView /* // The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) { // Custom initialization } return self; } */ - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { // Initialization code } return self; } /* // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { [super viewDidLoad]; } */ /* // Override to allow orientations other than the default portrait orientation. - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } */ - (void)drawRect:(CGRect)rect { CGContextRef ctx = UIGraphicsGetCurrentContext(); CGContextClearRect(ctx, rect); //CGContextSetCMYKFillColor(ctx, 35.0, 56.0, 34.0, 30.0, 1.0); //CGContextSetRGBFillColor(ctx, 92.0f, 95.0f, 97.0f, 1.0f); //CGContextFillRect(ctx, CGRectMake(0, 0, 300, 280)); CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); float fltX1,fltX2,fltY1,fltY2=0; NSArray *hoursInDays = [[NSArray alloc] initWithObjects:@"0",@"1" ,@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10",@"11",@"12", nil]; fltX1 = 30; fltY1 = 5; fltX2 = fltX1; fltY2 = 270; //Dividing the Y-axis CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); //float y = 275; for(int intIndex = 0 ; intIndex < [hoursInDays count] ; fltY2-=20, intIndex++) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, fltX1-3 , fltY2); CGContextAddLineToPoint(ctx, fltX1+3, fltY2); CGContextSelectFont(ctx, "Helvetica", 14.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); CGContextSetRGBFillColor(ctx, 0, 255, 255, 1); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForYAxis = [[hoursInDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx, fltX1-18, fltY2-18 , arrayDataForYAxis, strlen(arrayDataForYAxis)); CGContextStrokePath(ctx); } CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextSetLineWidth(ctx, 2.0); fltX1 = 5; fltY1 = 250; fltX2 = 270; fltY2 = fltY1; NSArray *weekDays =[[NSArray alloc] initWithObjects:@"Sun", @"Mon", @"Tus", @"Wed", @"Thu", @"Fri", @"Sat", nil]; //Dividing the X-axis CGContextMoveToPoint(ctx, fltX1, fltY1); CGContextAddLineToPoint(ctx, fltX2, fltY2); //float y = 275; for(int intIndex = 0 ; intIndex < [weekDays count] ; fltX1+=33, intIndex++) { CGContextSetRGBStrokeColor(ctx, 2.0, 2.0, 2.0, 1.0); CGContextMoveToPoint(ctx, fltX1+52 , fltY2-3); CGContextAddLineToPoint(ctx, fltX1+52, fltY2+3); CGContextSelectFont(ctx, "Arial", 15.0, kCGEncodingMacRoman); CGContextSetTextDrawingMode(ctx, kCGTextFill); CGContextSetRGBFillColor(ctx, 0, 255, 255, 1); CGAffineTransform xform = CGAffineTransformMake( 1.0, 0.0, 0.0, -1.0, 0.0, 0.0); CGContextSetTextMatrix(ctx, xform); const char *arrayDataForXAxis = [[weekDays objectAtIndex:intIndex] UTF8String]; CGContextShowTextAtPoint(ctx, fltX1+37, fltY2+18 , arrayDataForXAxis, strlen(arrayDataForXAxis)); CGContextStrokePath(ctx); } } - (void)didReceiveMemoryWarning { // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use. } - (void)viewDidUnload { // Release any retained subviews of the main view. // e.g. self.myOutlet = nil; } - (void)dealloc { [super dealloc]; } @end

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  • Asp.Net Mvc JQuery ajax input parameters are null

    - by Dofs
    Hi, I am trying to post some data with jQuery Ajax, but the parameters in my Ajax method are null. This is simple test to send data: var dataPost = { titel: 'titel', message: 'msg', tagIds: 'hello' }; jQuery.ajax({ type: "POST", url: "Create", contentType: 'application/json; charset=utf-8', data: $.toJSON(dataPost), dataType: "json", success: function(result) { alert("Data Returned: "); } }); And my Ajax method looks like this: [HttpPost] public ActionResult Create(string title, string message, string tagIds) {... } There is something basic wrong with the data I send, but I can't figure out what. All the time the title, message and tagIds are null, so there is something wrong with the encoding, I just don't know what. Note: The jQuery.toJSON is this plugin

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  • Displaying FontFamily in Combobox

    - by Torsten
    Hi. My goal is to manipulate the text-styles of my application via DependencyProperties. I got a diagram in which the texts are to be manipulated in size, fontfamily, color, etc. So I'd like to use an interface similar to a rich text editor like Word. I'm using this code in my TextStyleVM http://shevaspace.blogspot.com/2006/12/i-have-some-fun-with-formattedtext_14.html So I have a FontFamilyProperty and a Getter and Setter for it: public static DependencyProperty FontFamilyProperty = DependencyProperty.Register( "FontFamily", typeof(FontFamily), typeof(OutlinedText), new FrameworkPropertyMetadata( SystemFonts.MessageFontFamily, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure), new ValidateValueCallback(IsValidFontFamily)); public FontFamily FontFamily { get { return (FontFamily)base.GetValue(FontFamilyProperty); } set { base.SetValue(FontFamilyProperty, value); } } Then there is a ToStyle method, which sets the style for the labels of the diagram, which are to be manipulated: Style style = new Style(); Binding fontFamilyBinding = new Binding("FontFamily"); fontFamilyBinding.Source = this; Setter fontFamilySetter = new Setter(); fontFamilySetter.Property = TextBlock.FontFamilyProperty; fontFamilySetter.Value = fontFamilyBinding; style.Setters.Add(fontFamilySetter); return style; Now this works for a TextBox. The textbox displays the current FontFamily, and if I enter a new, valid FontFamily like Arial into the textbox the FontFamily of the labels are changed. However, what I'd like to have is a combobox, which displays the SystemFonts and where I can choose one FontFamily for my labels. However, the binding doesn't seem to work. Neither the system fonts nor the current fonts of the labels are displayed. The combobox is just empty. This is my xaml: <r:RibbonLabel Content="FontFamily" /> <!--these do not work--> <r:RibbonComboBox SelectedItem="{Binding FontFamily}"/> <r:RibbonComboBox ItemsSource="{Binding FontFamily}"/> <!--this works--> <r:RibbonTextBox Text="{Binding FontFamily}"/> Now, I assume I have to set a different Setter for a ComboBox in the ToStyle Method. But I have no clue, which one. Maybe someting like this: fontFamilySetter.Property = ComboBox.ItemSource; However, if I set that Property, the TextBox still works. So is this the wrong place to start at? I'd also be grateful if someone could hint me to some documentation about using these Style-, Setter-, Binding-key-words, which are used in the ToStyle method, since this is somebody elses code I'm working with.

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  • How to improve the builder pattern?

    - by tangens
    Motivation Recently I searched for a way to initialize a complex object without passing a lot of parameter to the constructor. I tried it with the builder pattern, but I don't like the fact, that I'm not able to check at compile time if I really set all needed values. Traditional builder pattern When I use the builder pattern to create my Complex object, the creation is more "typesafe", because it's easier to see what an argument is used for: new ComplexBuilder() .setFirst( "first" ) .setSecond( "second" ) .setThird( "third" ) ... .build(); But now I have the problem, that I can easily miss an important parameter. I can check for it inside the build() method, but that is only at runtime. At compile time there is nothing that warns me, if I missed something. Enhanced builder pattern Now my idea was to create a builder, that "reminds" me if I missed a needed parameter. My first try looks like this: public class Complex { private String m_first; private String m_second; private String m_third; private Complex() {} public static class ComplexBuilder { private Complex m_complex; public ComplexBuilder() { m_complex = new Complex(); } public Builder2 setFirst( String first ) { m_complex.m_first = first; return new Builder2(); } public class Builder2 { private Builder2() {} Builder3 setSecond( String second ) { m_complex.m_second = second; return new Builder3(); } } public class Builder3 { private Builder3() {} Builder4 setThird( String third ) { m_complex.m_third = third; return new Builder4(); } } public class Builder4 { private Builder4() {} Complex build() { return m_complex; } } } } As you can see, each setter of the builder class returns a different internal builder class. Each internal builder class provides exactly one setter method and the last one provides only a build() method. Now the construction of an object again looks like this: new ComplexBuilder() .setFirst( "first" ) .setSecond( "second" ) .setThird( "third" ) .build(); ...but there is no way to forget a needed parameter. The compiler wouldn't accept it. Optional parameters If I had optional parameters, I would use the last internal builder class Builder4 to set them like a "traditional" builder does, returning itself. Questions Is this a well known pattern? Does it have a special name? Do you see any pitfalls? Do you have any ideas to improve the implementation - in the sense of fewer lines of code?

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