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• on hover overlay image in CSS

  - by Juventus

  I need a div with picture bg to overlay an image (with some amount transparency) when hovered on. I need to be able to have one transparent overlay that can be used and reused throughout the site on any image. My first attempt was round-about to say the least. Because I found out you cannot roll-over an invisible div I devised a sandwhich system in which the original image is the first layer, the overlay is the second layer, and the original image is third layer again. This way, when you roll-over, the original image disappears revealing the overlay image over the original image: http://www.nightlylabs.com/uploads/test.html So it works. Kinda. Because of you cannot interact with an visibility:invisible element (why?!) the roll-over flickers unless you rest the cursor on it. Any help? This method is bad so if anyone has a better one please comment.

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• Initializing a Global Struct in C

  - by Scott

  What is the best way to accomplish the following in C? #include <stdio.h> struct A { int x; }; struct A createA(int x) { struct A a; a.x = x; return a; } struct A a = createA(42); int main(int argc, char** argv) { printf("%d\n", a.x); return 0; } When I try to compile the above code, the compiler reports the following error: "initializer element is not constant" The bad line is this one: struct A a = createA(42); Can someone explain what is wrong? I'm not very experienced in C. Thanks!

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• Using DropDownList in EditTemplates of a GridView

  - by vaibhav

  I am working on a GridView in Asp.Net. When initially a the Page Loads, my gridview look like: When a user clicks, to edit a row, I am using edit templates to show 'Domain' in a DropDownList. But problem is , when the DropDownlist gets load with data, it lost the current value of the 'Domain'. i.e If I want to edit 4th Row, its domain which is currently set to 'Computers' is getting changed to 'MBA' which is ofcourse the first element return by the DataSource. I want to display the current value ('computers') as the selected value in DropDownList. But I am unable to get the value of Domain, which is being edited.

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• Overlay WriteableBitmap with color

  - by rajenk

  I'm trying to overlay a WriteableBitmap with a certain color in Silverlight. I have a black and white base image, which I'm using to create smaller WriteableBitmap images for a new composite image and I want to overlay either the black or white part of the source image cut-out with a certain color before adding it to the composite image. What I'm doing now is: var cutOut = new WriteableBitmap(8, 14); /* cut out the image here */ cutOut.Render(sourceImage, transform); // sourceImage is the base image cutOutImage.Source = cutOut; // cutOutImage is an Image element in XAML compositeImage.Render(cutOutImage, transform2); // compositeImage is the final WriteableBitmap that is shown on screen I tried the methods on http://blogs.silverarcade.com/silverlight-games-101/15/silverlight-blitting-and-blending-with-silverlights-writeablebitmap/ and using the extension methods from hxxp://writeablebitmapex.codeplex.com/, but I cannot seem to get a color overlay on the cutOut image before rendering it to the compositeImage. Does anyone know of a good method to do this? Thanks in advance.

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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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• StackOverflow Exception in Umanaged Dll When Called from Managed DLL

  - by Ngu Soon Hui

  My question is similar to this one here, but there are some difference. I have a fortran dll as the backend, and a C# exe as the front end. I use PInvoke to pass data between them. There are 22 parameters between the C# and the fortran code. And some of them are integer, double, pointers ( C# pointers), array and whatnot. So it's a mix of types. The problem is that for small arrays, the code works fine, however, for large arrays (~10k element size), a stackoverflowexception was thrown right after my code enters into the managed code. Any idea why this is the case, and how to fix this?

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• Custom Fill Property on PathGeometry in Silverlight

  - by Otaku

  I've been looking at (and getting confused by) Dependency Properties - I'm not sure if this is what I need or if there is something else. I'm looking to something very specific with <Path.Data/> children in Silverlight, in particular <PathGeometry/>, <EllipseGeometry/>, etc. While the <Path/> element has a .Fill property, I'd like to add a .Fill property to any of it's Geometries, meaning it's a different color from it's parent. It could be a <SolidColorBrush/> or <LinearGradientBrush/> color, or a percentage of the parent color (like 20% darker than <Path.Fill/>. Is this possible? Is this a dependency property? How would <RectangleGeometry/>, for example, know that I am trying to fill it with a color? How would I get started? (adding WPF as a tag too as someone who knows WPF may be able to help)

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• Why doesn't @contenteditable work on the iPhone?

  - by plutext

  Safari HTML Reference: Supported Attributes says: contenteditable If true, the element can be edited on the fly; if false, it cannot. Availability Available in Safari 1.2 and later. Available in iPhone OS 1.0 and later. However, on my iPhone, I can't get it to work. Anyone have success with this? You can try it with this document (admittedly not pure html, but that document works in desktop Safari, and Chrome and Firefox 3). I haven't been able to get even the simplest html document to be editable in mobile Safari.

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• linq to xml query returning a list of all child elements

  - by Xience

  I have got an xml document which looks something like this. <Root> <Info>....</Info> <Info>....</Info> <response>....</response> <warning>....</warning> <Info>....</Info> </Root> How can i write a linqToXML query so that it returns me an IEnumerable containing each child element, in this case all five child elements of , so that i could iterate over them. The order of child elements is not definite, neither is number of times the may appear. Thanks in advance

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• Dataset -> XML Document - Load DataSet into an XML Document - C#.Net

  - by NLV

  Hello I'm trying to read a dataset as xml and load it into an XML Document. XmlDocument contractHistoryXMLSchemaDoc = new XmlDocument(); using (MemoryStream ms = new MemoryStream()) { //XmlWriterSettings xmlWSettings = new XmlWriterSettings(); //xmlWSettings.ConformanceLevel = ConformanceLevel.Auto; using (XmlWriter xmlW = XmlWriter.Create(ms)) { xmlW.WriteStartDocument(); dsContract.WriteXmlSchema(xmlW); xmlW.WriteEndDocument(); xmlW.Close(); using (XmlReader xmlR = XmlReader.Create(ms)) { contractHistoryXMLSchemaDoc.Load(xmlR); } } } But I'm getting the error - "Root Element Missing". Any ideas? Update When i do xmlR.ReadInnerXML() it is empty. Does anyone know why? NLV

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• How to access uploaded files in Ruby

  - by Jeff King

  I am trying use a Java Uploader in a ROR app (for its ease of uploading entire directories). The selected uploader comes with some PHP code that saves the files to the server. I am trying to translate this code to Ruby, but am stumped on this point: PHP has a very convenient superglobal – $_FILES – that contains a hash of all files uploaded to the current script via the HTTP POST method. It appears Ruby does not have a similar resource. Lacking that, what is the best way to access and save the uploaded files? I am using the JavaPowUpload uploader ( http://www.element-it.com/OnlineHelpJavaPowUpload/index.html ).

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• WSDL Object model

  - by Swaroop

  I'm using the WSDL object model (WOM) along with XSOM for a project of mine. The WOM gives me a way to drill down and look at messages and the message types which are element declarations. However, I am unable to find a way to parse the simple and complex types. The APIs are tricky. There seems to be some kind of a connection between WOM and XSOM. I'd really appreciate it if you could tell me how I can parse the simple and the complex types in my .wsdl file.

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• Strange error occurring when using wcf to run query against sql server

  - by vondip

  Hi all, I am building an asp.net application, using II6 on windows server 2003 (vps hosting). I am confronted with an error I didn't receive on my development machine (windows 7, iis 7.5, 64 bit). When my wcf service tries launching my query running against a local sql server this is the error I receive: Memory gates checking failed because the free memory (43732992 bytes) is less than 5% of total memory. As a result, the service will not be available for incoming requests. To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element. and ideas??

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• What is the Relative Performance of Pseudo-Class and Custom Selectors?

  - by James Wiseman

  It's my understanding that, in terms of selector speed, that #ID selectors are fastest, followed by element selectors, and then .class selectors. I have always assumed that pseudo-class selectors and custom selectors (those in the form ':selector') are similar to .class selectors, but I realised that I'm just not sure. I realise that this does depend on the complexity of the code within the pseudo-class/custom selector, so I guess I'd like to know the answer with this excluded as factor. Any help would be appreciated. Thanks.

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• Form Elements in ASP.NET Master Pages and Content Pages

  - by Rob Cooper

  OK, another road bump in my current project. I have never had form elements in both my master and content pages, I tend to have all the forms in the content where relevant. In the current project however, we have a page where they want both. A login form at the top right, and a questions form in the content. Having tried to get this in, I have run in to the issue of ASP.NET moaning about the need for a single form element in a master page. TBH, I really dont get why this is a requirement on ASP.NET's part, but hey ho. Does anyone know if/how I can get the master and content pages to contain form elements that work independantly? If not, can you offer advice on how to proceed to get the desired look/functionality?

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• intercept RelativeSource FindAncestor

  - by Pradeep

  I have a WPF application which runs as a excel plugin, it has its visual tree like so Excel ElementHost WPF UserControl WPF ribbon bar control Now any controls sitting on the WPF ribbon bar control are not enabled when the plugin is loaded within excel. See error below System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Window', AncestorLevel='1''. BindingExpression:Path=IsActive; DataItem=null; target element is 'Ribbon' (Name=''); target property is 'NoTarget' (type 'Object') If I nest the ribbon bar control in a standalone Window(outside excel) it works fine. Is there a way to intercept the FindAncestor call for a Window and wire it to something else.? Note that I cannot change the above binding as it isn't my control.

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• Convert xml as string

  - by hakish

  i have a scenario where in i need to send an xml as a tag content in a SOAP request message to a webservice for example <arg_1><xml version="1.0" encoding="UTF-8"?><sometag><somemoretag>abcd</somemoretag></sometag></arg_1></code> arg_1 happens to be an String parameter to a webservice. So i bring in a CDATA section for this <arg_1><![CDATA[<xml version="1.0" encoding="UTF-8"?><sometag><somemoretag>abcd</somemoretag></sometag>]]></arg_1> But this keeps throwing me an exception org.xml.sax.SAXException: WSWS3084E: Error: SimpleDeserializer encountered a child element, which is NOT expected, in something it was trying to deserialize. Message being parsed: I keep getting this exception. Has anyone seen this before??

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• jQuery partial page refresh after form submit

  - by heeboir

  When using jQuery to submit a form is it possible to place the resulting page (after the submit) inside another HTML element? I'll try to make this clearer. Up to now I've been using Callback methods that among others do a document.forms['form'].submit(); whenever a form has been updated with new information and needs to be refreshed. However, this results in a full page refresh. I'm implementing Partial Page Refresh using jQuery and thought of using something like var newContent = jQuery('#form').submit(); jQuery('#div').load(newContent); However, that does not seem to work as the page is still fully refreshed. The content is correct, however the behaviour seems to be exactly the same as before - so I'm not really sure if what I want is actually possible with jQuery. Any hints and pointers would be helpful. Thanks.

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• How To Draw More Precise Lines using Core Graphics and CALayer

  - by user308444

  Hello I am having a hard time making this UI element look the way I want (see screenshot). Notice the image on the right--how the line width and darkness looks inconsistent compared to the image on the left (which happens to be a screen grab from safari) where the border width is more consistent. How does apple make their lines so perfect? I'm using a CALayer and the Core Graphics API to draw the image on the right. Is it possible to draw such perfect lines with the standard apis?

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• Accessing elements of List<List<string>>

  - by shiv09

  Hello Friends........... Can anyone let me know how can access an element of a list that has been added to a list of list............. I'll mention the code............ List str = new List(); List stud = new List(); A method has been defined that inserts data into str and after the method gets over......... stud.Add(str); The method and stud.Add(str) is on a button click...... so, each time str contains different data....... the problem is I want to search in whole of stud i.e. all the str created, whether str[0]==textBox3.Text; I'm confused in the For loops...how to reach to all the str[0] in stud to verify the condition...................

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• DataContractSerializer KnownType attribute not being respected?

  - by e28Makaveli

  I have a class that is decorated with a KnownType attribute with a type of the class. Is this not allowed? [KnownType(typeof(Occ600UIConfig))] public class Occ600UIConfig { } If so, why is the DCS throwing the following exception? {"Error in line 1 position 387. Element 'http://schemas.microsoft.com/2003/10/Serialization/Arrays:Value' contains data of the 'http://schemas.datacontract.org/2004/07/OCC600.Infrastructure.Dictionary.BusinessEntities:Occ600UIConfig' data contract. The deserializer has no knowledge of any type that maps to this contract. Add the type corresponding to 'Occ600UIConfig' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to DataContractSerializer."}

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• multy threading wpf

  - by Eran

  Hey, I'm using web refernce call in new working thread in my application as follow: Thread callRunner = new Thread(delegate() { _mediator.IncomingCallDetails(phoneNumber); }); callRunner.Start() ; the _mediator calls the web refernce and replay to the caller in event as follow: void IncomingCallComplited(IncomingCallEventArg args) { Caller = args.Caller; Lodgers = args.Lodgers; PreviousMissions = args.PreviousMissions; } Caller ,Lodgers and PreviousMissions are properties of an object that bind to GUI element,as for now the binding works fine and i can see the values from the web refernce in screen my question is should I use Dispatcher in the event or in any other phase ? and if I do can someone please explain why? Thanks Eran

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• multi threading wpf

  - by Eran

  Hey, I'm using web refernce call in new working thread in my application as follow: Thread callRunner = new Thread(delegate() { _mediator.IncomingCallDetails(phoneNumber); }); callRunner.Start() ; the _mediator calls the web refernce and replay to the caller in event as follow: void IncomingCallComplited(IncomingCallEventArg args) { Caller = args.Caller; Lodgers = args.Lodgers; PreviousMissions = args.PreviousMissions; } Caller ,Lodgers and PreviousMissions are properties of an object that bind to GUI element,as for now the binding works fine and I can see the values from the web reference in screen my question is should I use Dispatcher in the event or in any other phase ? and if I do can someone please explain why? Thanks Eran

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• Get text under mouse cursor in mac osx leopard/snow leopard

  - by Liuyi Sun

  Hi there, is there any idea for getting the text under the mouse cursor? I'm trying to build a dictionary app, that pops up a panel of translates when mouse hangs over a word. I took a look at the accessiblity apis, and it only can find the current ui element, but not the current word... my last choice will be makeing screenshots frequently, and doing ocr... that'll be cpu consuming, I don't like that.. any idea for this? thanks in advance!

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• Creating a Wiki site in SharePoint 2010

  - by Ben

  I have a SharePoint 2010 site set up and would like to add a Wiki site to it. Normally, to add a subsite to a parent site you would click "Site Actions" - "New Site" and choose the site type (e.g. Team Site) and it would work fine. In the case of adding a Wiki site, I choose "Enterprise Wiki", and get "Error An Unexpected Error has occured Correlation Id:...". So i took the CorrelationId and checked in the ULS files to see what the error is, and the first bad sign seems to be: SharePoint Foundation Feature Infrastructure " The element of type 'ContentTypeBinding' for feature 'EnterpriseWiki' (id: 76d688ad-c16e-4cec-9b71-7b7f0d79b9cd) threw an exception during activation: Specified argument was out of the range of valid values. Parameter name: Content type not found (Id: '0x010100C568DB52D9D0A14D9B2FDCC96666E9F2007948130EC3DB064584E219954237AF39004C1F8B46085B4D22B1CDC3DE08CFFB9C')." There are more errors in the log, but this seems to be the first one. Any ideas on whats going on? Thanks

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