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• What is the WPF equivilant for the FlowLayoutPanel?

  - by Sargola

  I am working on a WPF application (a one note clone which is called "note your life") where you can dynamically assign Tags to an entry (just as in virtually any web 2.0 app these days). for this I had in my windows forms prototype a FlowLayoutPanel that did the job very well. I want to have the tags float to the next line if there isn't enough space and get a scrollbar if needed. how can this be achieved with WPF? I played around with <StackPanel Orientation="Horizontal" FlowDirection="LeftToRight" ...> but this doesn't move the elements in the next line if needed. Any suggestions?

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• ASP.NET + jQuery UI Modal: load aspx page into modal dialog

  - by kilonet

  I need to load aspx page into jQuery UI's modal dialog window. I used following approach: load page content via ajax call into dialog's div and show it: $.get('Page.aspx', function(response){ $('#dialog').html(response); $("#dialog").dialog('open'); }); but I've got very strange error (IE8) in line 137215738 (!): 'theForm.elements.length' - is null or not an object. JS debbuger says that source code is not available for such location. I have an assumption that this error happens because of multiple 'form' tags that appears on page after ajax call I wonder, how can i fix this? Or maybe some other way of showing aspx page in modal dialog?

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• Triggering FancyBox from a DIV onclick();

  - by Tim

  Hello, This question seems to be asked a lot, but I haven't seen an answer that works. So I have a div that works like this: <div onclick="location.href='http://www.abc123.com';" class="menuitem"> </div> Now I need the link (specified in location.href) to open up in a fancybox iframe. I would love to use an A element but this div holds other items so I don't think I can. I am open to all suggestions... even using elements other than divs, or using a different jquery iframe lightbox. Thanks Tim Mohr

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• Winform ListView databind

  - by Manu

  Hi, I have a Listview that uses databind. I set the DataSource property to a binding source. All works fine. The problem is that I need to have a column that is not databinded and contains only buttons that have the same handler for click event. To accomplish this I tried to add a subitem that is a button for each ListViewItem after InitializeComponent but doesn't work, nothing is displayed. Also I set the list view column type to Control. If I add elements to ListView and isn't databinded that the buttons appear. So it will be a great help for me to know if buttons could be displayed in column that is not databinded when the listview uses databinding for rest of columns. Thanks!

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• Trying to suppress StyleCop message SA1513:ClosingCurlyBracketMustBeFollowedByBlankLine

  - by mattruma

  I am trying to suppress the following StyleCop message for a specific property: SA1513: Statements or elements wrapped in curly brackets must be followed by a blank line. I am trying to do the following, but it doesn't seem to work: [SuppressMessage("Microsoft.StyleCop.CSharp.DocumentationRules", "SA1513:ClosingCurlyBracketMustBeFollowedByBlankLine", Justification = "There are no issues with this code")] public string CustomerId { get { return this.GetProperty(CustomerIdProperty); } set { if (this.IsNew) { this.SetProperty(CustomerIdProperty, value); } else { throw new ReadOnlyException("Id value can only be changed for a new record."); } } } Am I just doing something wrong? Or is this just not possible? It's a good rule, just not valid in my case for a property.

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• Android - ExpandableListView change background for child items

  - by DroidIn.net

  I'm using ExpandableListView in my app and one of the complains I get from the users is that when the list item is expanded it's hard to visually distinguish where the child item ends and next group item begins. So I would like to change background of the child list item to the different shade. Brutal attempts that I've made so far were based on directly changing background color and text of the elements inside the child view item but that leads to loss of hovers and highlights. So my question is - what is a good strategy to achieve the above? I tried styles and selectors but what really bums me - if I change background for child item then I need to add selectors for all combinations of focus/enabled etc. when all I'm trying to do it to overwrite a single thing. Is there a way to inherit parent style and set background only for non- focused, enabled child item with other styles retained?

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• Android "Hello, MapView" Tutorial - Map Tiles Do Not Load

  - by Onyx

  I am new to Android software development and new to this site. I am hoping someone might have some experience with the problem I am having. I've been following the Hello, MapView tutorial in order to not only learn the Android framework, but also the Google Maps library. I've tried my best to implement things exactly as the tutorial has instructed. My problem is that the application does load in my emulator (or even on my phone for that matter), but the map tiles do not load. Searching Google I found a post by someone else on another site having the same issue, but his/her problem was that the important elements added to the AndroidManifest.xml file were not in the right order. I double-checked this in mine, but everything seems to be right. So, I am not sure what the issue is and was hoping others have seen this before. I can provide any snippets of code, if that would help. Thank you.

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• jquery .live on load event

  - by bandhunt

  I need a way to use the jquery .live() function to act on elements that are loaded via ajax. For instance a div is loaded via ajax .load() <div id="mydiv"></div> Normally I do .live() with a click event, but I need to know how to tell the dom that this new div has loaded without any explicit actions/events from the user. This code doesn't work, but I want to do something like this: mydiv = $("#mydiv"); mydiv.live("mydiv.length > 0", function() { // do something }); The "mydiv.length" being a substitue for the typical "click" or other event.

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• Silverlight 4 MediaElement play sound

  - by NealWalters

  I converted a local sound file to a resource, which built this in my XAML: <UserControl.Resources> <my:Uri x:Key="SoundFiles">file:///c:/Audio/HebrewDemo/Shalom.wav</my:Uri> </UserControl.Resources> I did this by pasting a local disk mp3 filename into source, then clicked on the "dot" by source and chose "Extract Value to Resource". When I run, it tells me that "Uri" is not valid, and sure enough, in the Intellisense, I see other elements that start with "uri" but not just URI by itself. In the real world I want to specify a dynamic mp3 file name. For example, I might have a database of foreign language words used for flashcards, I want to play a sound file on a URL. But I thought I would try to walk before running...

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• iPad Web App: Detect Virtual Keyboard Using JavaScript in Safari?

  - by LKM

  I'm writing a web app for the iPad (not a regular App Store app - it's written using HTML, CSS and JavaScript). Since the keyboard fills up a huge part of the screen, it would make sense to change the app's layout to fit the remaining space when the keyboard is shown. However, I have found no way to detect when or whether the keyboard is shown. My first idea was to assume that the keyboard is visible when a text field has focus. However, when an external keyboard is attached to an iPad, the virtual keyboard does not show up when a text field receives focus. In my experiments, the keyboard also did not affect the height or scrollheight of any of the DOM elements, and I have found no proprietary events or properties which indicate whether the keyboard is visible.

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• Autorotate UINavigationController based Application in IPhoneOS 3.0

  - by Shoaibi

  I have an application which have code like: window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // UIWindow *window; viewController = [TopicsViewController new]; //TopicsViewController *viewController; //This is a UITableViewController navigationController = [UINavigationController new]; // UINavigationController *navigationController; UIImageView *background = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"background.png"]]; [self.navigationController.view addSubview:background]; [self.navigationController.view sendSubviewToBack:background]; [navigationController pushViewController:viewController animated:YES]; [window addSubview:[navigationController view]]; [window makeKeyAndVisible]; Basically i am using UINavigationController and then push UITableViewController or sometime a UIViewController. UIViewController contain elements such as UITextView, UIImage, UIScrollView. Problem is i have been trying to make this application respond to iphone rotation e.g. when held in landscape, application should switch to landscape and vice versa, but nothing works so far.

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• MVC2 Checkbox problem...

  - by BitFiddler

  When I used the html Helper Checkbox, it produces 2 form elements. I understand why this is, and I have no problem with it except: The un-checking of the checkbox does not seem to be in sync with the 'hidden' value. What I mean is that when I have a bunch of checkboxes being generated in a loop: <%=Html.CheckBox("model.MarketCategories[" & i & "].Value", category.Value)%> and the user deselects and checkbox and the category.Value is FALSE, the code being generated is: <input checked="checked" id="model_MarketCategories_0__Value" name="model.MarketCategories[0].Value" type="checkbox" value="true" /> <input name="model.MarketCategories[0].Value" type="hidden" value="false" /> This is wrong since the Value is False the checkbox should NOT be checked. Any ideas why this is happening?

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• jquery click event on td row not firing.

  - by TheAlbear

  i have a simple b it of jquert which displays the row below the current one if selected. What i want if for all the td elements but one to fire this method. Works on whole tr row $(document).ready(function(){ $("#report > tbody > tr.odd").click(function(){ $(this).next("#report tr").fadeToggle(600); }); }); want to do somthing like (doesnt work) $(document).ready(function(){ $("#report > tbody > tr.odd > td.selected").click(function(){ $(this).next("#report tr").fadeToggle(600); }); });

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• Does Powershell have an "eval" equivalent? Is there a better way to see a list of properties and val

  - by glenatron

  I'm doing a bit of Powershell scripting ( for the first time ) to look at some stuff in a Sharepoint site and what I would like to be able to do is to go through a list of properties of an object and just output their values in a "property-name = value" kind of format. Now I can find the list of elements using this: $myObject | get-member -membertype property Which will return a list of all the properties in a very clear and readable fashion. But what I need is to find a value for those properties. In some scripting languages I could have a kind of eval( "$myObject.$propertyName" ) call - where I have extracted $propertyName from the get-member output - and have it evaluate the string as code, which for the kind of quick-and-dirty solution I need would be fine. Does this exist in Powershell or is there a more convenient way to do it? Should I be using reflection instead?

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• Genetic algorithms

  - by daniels

  I'm trying to implement a genetic algorithm that will calculate the minimum of the Rastrigin functon and I'm having some issues. I need to represent the chromosome as a binary string and as the Rastrigin's function takes a list of numbers as a parameter, how can decode the chromosome to a list of numbers? Also the Rastrigin's wants the elements in the list to be -5.12<=x(i)<=5.12 what happens if when i generate the chromosome it will produce number not in that interval? I'm new to this so help and explanation that will aid me in understanding will be highly appreciated. Thanks.

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• WPF: how to find an element in a datatemplate from an itemscontrol

  - by EV

  Hi, I have the following problem: the application is using the custom itemscontrol called ToolBox. The elements of a toolbox are called toolboxitems and are custom contentcontrol. Now, the toolbox stores a number of images that are retrieved from a database and displayed. For that I use a datatemplate inside the toolbox control. However, when I try to drag and drop the elements, I don't get the image object but the database component. I thought that I should then traverse the structure to find the Image element. here's the code: Toolbox: public class Toolbox : ItemsControl { private Size defaultItemSize = new Size(65, 65); public Size DefaultItemSize { get { return this.defaultItemSize; } set { this.defaultItemSize = value; } } protected override DependencyObject GetContainerForItemOverride() { return new ToolboxItem(); } protected override bool IsItemItsOwnContainerOverride(object item) { return (item is ToolboxItem); } } ToolBoxItem: public class ToolboxItem : ContentControl { private Point? dragStartPoint = null; static ToolboxItem() { FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(ToolboxItem), new FrameworkPropertyMetadata(typeof(ToolboxItem))); } protected override void OnPreviewMouseDown(MouseButtonEventArgs e) { base.OnPreviewMouseDown(e); this.dragStartPoint = new Point?(e.GetPosition(this)); } public String url { get; private set; } protected override void OnMouseMove(MouseEventArgs e) { base.OnMouseMove(e); if (e.LeftButton != MouseButtonState.Pressed) { this.dragStartPoint = null; } if (this.dragStartPoint.HasValue) { Point position = e.GetPosition(this); if ((SystemParameters.MinimumHorizontalDragDistance <= Math.Abs((double)(position.X - this.dragStartPoint.Value.X))) || (SystemParameters.MinimumVerticalDragDistance <= Math.Abs((double)(position.Y - this.dragStartPoint.Value.Y)))) { string xamlString = XamlWriter.Save(this.Content); MessageBoxResult result = MessageBox.Show(xamlString); DataObject dataObject = new DataObject("DESIGNER_ITEM", xamlString); if (dataObject != null) { DragDrop.DoDragDrop(this, dataObject, DragDropEffects.Copy); } } e.Handled = true; } } private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject { for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++) { DependencyObject child = VisualTreeHelper.GetChild(obj, i); if (child != null && child is childItem) return (childItem)child; else { childItem childOfChild = FindVisualChild<childItem>(child); if (childOfChild != null) return childOfChild; } } return null; } } here is the xaml file for ToolBox and toolbox item: <Style TargetType="{x:Type s:ToolboxItem}"> <Setter Property="Control.Padding" Value="5" /> <Setter Property="ContentControl.HorizontalContentAlignment" Value="Stretch" /> <Setter Property="ContentControl.VerticalContentAlignment" Value="Stretch" /> <Setter Property="ToolTip" Value="{Binding ToolTip}" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type s:ToolboxItem}"> <Grid> <Rectangle Name="Border" StrokeThickness="1" StrokeDashArray="2" Fill="Transparent" SnapsToDevicePixels="true" /> <ContentPresenter Content="{TemplateBinding ContentControl.Content}" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" ContentTemplate="{TemplateBinding ContentTemplate}"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Setter TargetName="Border" Property="Stroke" Value="Gray" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <Style TargetType="{x:Type s:Toolbox}"> <Setter Property="SnapsToDevicePixels" Value="true" /> <Setter Property="Focusable" Value="False" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate> <Border BorderThickness="{TemplateBinding Border.BorderThickness}" Padding="{TemplateBinding Control.Padding}" BorderBrush="{TemplateBinding Border.BorderBrush}" Background="{TemplateBinding Panel.Background}" SnapsToDevicePixels="True"> <ScrollViewer VerticalScrollBarVisibility="Auto"> <ItemsPresenter SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" /> </ScrollViewer> </Border> </ControlTemplate> </Setter.Value> </Setter> <Setter Property="ItemsPanel"> <Setter.Value> <ItemsPanelTemplate> <WrapPanel Margin="0,5,0,5" ItemHeight="{Binding Path=DefaultItemSize.Height, RelativeSource={RelativeSource AncestorType=s:Toolbox}}" ItemWidth="{Binding Path=DefaultItemSize.Width, RelativeSource={RelativeSource AncestorType=s:Toolbox}}" /> </ItemsPanelTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> Example usage: <Toolbox x:Name="NewLibrary" DefaultItemSize="55,55" ItemsSource="{Binding}" > <ItemsControl.ItemTemplate> <DataTemplate> <StackPanel> <Image Source="{Binding Path=url}" /> </StackPanel> </DataTemplate> </ItemsControl.ItemTemplate> </Toolbox> The object that I get is a database object. When using a static resource I get the Image object. How to retrieve this Image object from a datatemplate? I though that I could use this tutorial: http://msdn.microsoft.com/en-us/library/bb613579.aspx But it does not seem to solve the problem. Could anyone suggest a solution? Thanks!

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• How to get the value of a SELECT HtmlElement in C# webBrowser control

  - by AndrewW

  Hi, In a C# WebBrowser control, I have generated a SELECT HtmlElement with a number of OPTION elements using w.RenderBeginTag(HtmlTextWriterTag.Select). I need to get the value of the select when the user changes it, and so added an event handler in the WebBrowser DocumentCompleted event. private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { .... webBrowser1.Document.GetElementById("id_select_0").AttachEventHandler("onchange", new EventHandler(ddSelectedIndexChanged)); .... } protected void ddSelectedIndexChanged(object sender, EventArgs e) { .... } The event handler does get called, but the sender parameter is null and e is empty. Does anyone know how to overcome this problem? Andrew

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• reservoir sampling problem: correctness of proof

  - by eSKay

  This MSDN article proves the correctness of Reservoir Sampling algorithm as follows: Base case is trivial. For the k+1st case, the probability a given element i with position <= k is in R is s/k. The probability i is replaced is the probability k+1st element is chosen multiplied by i being chosen to be replaced, which is: s/(k+1) * 1/s = 1/(k+1), and prob that i is not replaced is k/k+1. So any given element's probability of lasting after k+1 rounds is: (chosen in k steps, and not removed in k steps) = s/k * k/(k+1), which is s/(k+1). So, when k+1 = n, any element is present with probability s/n. about step 3: What are the k+1 rounds mentioned? What is chosen in k steps, and not removed in k steps? Why are we only calculating this probability for elements that were already in R after the first s steps?

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• UINavigationBar height

  - by kpower

  In my app I work with an UINavigationController. I've added it to the window (MainWindow.xib, with IB) and simulated on my main view (in IB: Simulated User Elements / Top Bar / Navigation Bar). Navigation bar is displayed, but its height isn't standard. At least in IB it is bigger than in launched app. What's wrong? And how can I restore height to the initial state (as in IB)? P.S.: I know that I can set it directly from code. But this way looks like a "crutch".

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• soapUI - any way to automatically generate input data?

  - by Graham Clark

  I've just started looking at soapUI, and it seems to be a pretty good web service testing tool. It can automatically generate request SOAP messages with all the elements from the WSDL in there, no problem. However, what would be splendid is if it could automatically generate sample random input data, using the WSDL as a guide. For example, if my service is expecting a string, an enumeration, and a date-time, it seems like it wouldn't be too hard for the tool to generate one or more messages with valid values. Is such a feature available in soapUI, either natively or as a plug-in, or am I over-simplifying this?

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• How to parse invalid HTML with Perl?

  - by bodacydo

  I maintain a database of articles with HTML formatting. Unfortunately the editors who wrote articles didn't know proper HTML, so they often have written stuff like: <div class="highlight"><html><head></head><body><p>Note that ...</p></html></div> I tried using HTML::TreeBuilder to parse this HTML but after parsing it and dumping the resulting tree, all the elements between <div class="highlight">...</div> are gone. I'm left with just <div class="highlight"></div>. The editors often have also done things like: <div class="article"><style>@font-face { font-family: "Cambria"; }</style>Article starts here</div> Parsing this with HTML::TreeBuilder results in empty <div class="article"></div> again. Any ideas how to approach this broken HTML and actually make sense out of it?

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• Weighted random selection using Walker's Alias Method (c# implementation)

  - by Chuck Norris

  I was looking for this algorithm (algorithm which will randomly select from a list of elements where each element has different probability of being picked (weight) ) and found only python and c implementations, after I did a C# one, a bit different (but I think simpler) I thought I should share it, and ask your opinion ? this is it: using System; using System.Collections.Generic; using System.Linq; namespace ChuckNorris { class Program { static void Main(string[] args) { var oo = new Dictionary<string, int> { {"A",7}, {"B",1}, {"C",9}, {"D",8}, {"E",11}, }; var rnd = new Random(); var pick = rnd.Next(oo.Values.Sum()); var sum = 0; var res = ""; foreach (var o in oo) { sum += o.Value; if(sum >= pick) { res = o.Key; break; } } Console.WriteLine("result is "+ res); } } } if anyone can remake it in f# please post your code

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• How do the performance characteristics of jQuery selectors differ from those of CSS selectors?

  - by Moss

  I came across Google's Page Speed add-on for Firebug yesterday. The page about using efficient CSS selectors said to not use overqualified selectors, i.e. use #foo instead of div#foo. I thought the latter would be faster but Google's saying otherwise, and who am I to go against that? So that got me wondering if the same applied to jQuery selectors. This page I found the link to on SO says I should use $("div#foo"), which is what I was doing all along, since I thought that things would speed up by limiting the selector to match div elements only. But is it really better than writing $("#foo") like Google's saying for CSS selectors, or do CSS versus jQuery element matching work in different ways and I should stick with $("div#foo")?

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• Linq to Entities : using ToLower() on NText fields

  - by Julien N

  I'm using SQL Server 2005, with a case sensitive database.. In a search function, I need to create a Linq To Entities (L2E) query with a "where" clause that compare several strings with the data in the database with these rules : The comparison is a "Contains" mode, not strict compare : easy as the string's Contains() method is allowed in L2E The comparison must be case insensitive : I use ToLower() on both elements to perform an insensitive comparison. All of this performs really well but I ran into the following Exception : "Argument data type ntext is invalid for argument 1 of lower function" on one of my fields. It seems that the field is a NText field and I can't perform a ToLower() on that. What could I do to be able to perform a case insensitive Contains() on that NText field ?

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• Android: Custom view based on layout: how?

  - by Peterdk

  I am building a Android app and I am a bit struggling with custom Views. I would like to have a reusable View that consist of a few standard layout elements. Let's say a relativelayout with some buttons in it. How should I proceed. Should I create a custom view class that extends RelativeLayout and programmaticly add those buttons? I would think that's a bit overkill? What's the way to do it properly in Android?

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