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  • How reliable is DateTime.Utc in Silverlight applications?

    - by Edward Tanguay
    I have a silverlight application which users will be running in various time zones. The applications load their data from the server at one time, then cache it in IsolatedStorage. When I make changes to the data on the server, I want to be able to change the "last updated time" so that all applications download the newest data the next time they check this date. However, I'm a bit confused as to how to handle the time zone issue since a if the server is in New York and the update time is set to 2010-01-01 17:00:00 and a client in Seattle checks compares it to its local time of 2010-01-01 14:00:00 it won't update and will continue to provide old data for three more hours. My solution is to always post the update time in UTC time, not with the time on the server, then make the Silverlight app check with DateTime.UtcNow. Is this as easy as it sounds or are their issues with this, e.g. that timezones are not set correctly on computers and hence the SilverlightApp does not report the correct UTC time. Can anyone say from experience how likely it is that using DateTime.UtcNow like this for cache refreshing will work in all cases? If DateTime.UtcNow is not reliable, I will just use an incremented "DataVersion" integer but there are other scenarios in which getting time zone sychronization down would make it useful thoroughly understand how to solve this in silverlight apps.

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  • How to write C++ audio processing applications?

    - by cesko82
    Hi everyone, I'm an Electronics and Telecommunications student, next to my graduation. I'm gonna work on a project that involves my knowledge about DSP, music and audio in general. I allready know all the basic mathematic instruments and all the stuff I need to manage it, such as FFT, circular convolution ecc ecc. I want to learn C++ programming basically for one reason: it's very important in the professional world!!! And I think it's one of the most used to write applications working with audio, especially when it's about real time processing. Ok, after this small introduction I would like to know first, which are the most used libraries to work with audio processing in c++?? I was longer looking on the web but i couldn't find a lo of working stuff. (I work under linux with eclipse CDT enviroment). Then I would like to know if there are good sources to learn how to write some working code, such as for example how to write a simple low pass filter. Basically now i will not write real time applications, I would like to start from the processing of a WAV file, or even better an MP3 file, so basically on vectors of samples. Let's say that basically for now I would like to extract the waveform from an audio file, and save it to a thumbnail or to a PNG image. Ok, for now I think it's all I would need. Any ideas, advices, libraries, books, interesting sources about that? Thanks a lot in advance for any kind of answer. Giovanni.

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  • mini cms library/framework?

    - by rap-uvic
    Hello all, I have a web application which needs to allow admins to create content pages. I'd rather not re-invent the wheel here. What I need is something like Joomla, but it doesn't have to be a full fledged CMS. I need a framework or a library that I can use with my current web application which will present a nice interface for admin to create sections/pages, and then edit and style them just like joomla. My web application is built on .Net 3.5 and Sql Server 2005. Any ideas?

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  • Which metadata I should save when downloading web-pages?

    - by Vojtech R.
    Hi, I'm going to download (for future purposes of language processing) some thousands webpages. Now I'm thinking, which metadata I should save. I explore this, but I do not wont to neglect something important. <title> <link> <publish_date> <date_downloaded> <source> // to this page <keyword> // for Solr indexing <text> // cleaned body of page Is there something important what I could miss in future?

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  • How to build a web site which gives a sub-domain dynamically to every registered user?

    - by coderex
    Suppose i have a site and i wish to give a sub-domain for each registered users. like my site http://site.com/ and the test-user is a user registered on my site and site want to make sub-domain for that user. Like http://test-user.site.com Like http://test-user1.site.com for test-user1. Hop you understood the requirement. How can i create a sub-domain using my sites back-end. or dynamically while register

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  • Lightweight PHP library alternative to common frameworks

    - by artarad
    Hi hi, I'm looking for a easy to learn php library to use for my coming web app project. I've recently finished a web app with fully handwritten raw php code and it's absolutely hard to be done again for another project. even though I have the recent project code snippets to be used again, but due to their non-structural arrangement (not object oriented), i have no passion to use 'em again. I have no experience with common frameworks like ZF, CakePhp, CodeIgniter, so I think to get my hands on a multipurpose OO library for my web app and the framework learning will be the next step! any suggestion? UPDATE: Many thanks guys, I have not enough time to get through the depth of every lib or framework you have kindly introduced. Since I'm going one step further I'm going to use ZF as famous framework which could provide me more job opportunities perhaps. thankssss :)

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  • A public web API: What do developers prefer to consume?

    - by spender
    We've got a bunch of data that we'd like to expose to the world hosted on an asp-net.mvc website. I'd like to ensure that we deliver it using technology that is easy for end developers to implement and not tied to any particular platform, rather than using technology that is unpopular/incompatible with developers. The kind of requests we expect are mainly to retrieve search results (not many parameters), but down the like we'd like to be able to provide catalogue lookups and the like, which may be more complex. Bearing this in mind, what is the preferred means of doing this?

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  • What tool can I use to test my web app in different resolutions?

    - by strakastroukas
    Back in the past, i found a third party webpage that was able to capture and save images of my website in different resolutions and browsers. Of course i have no more that bookmark... So is there any webpage or application where i can see how my webpage looks like in different resolution? And here are the resolutions i would like to check for... 1. 1024x768 24.56% 2. 1280x800 22.06% 3. 1280x1024 13.42% 4. 1366x768 7.10% 5. 1440x900 6.68%

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  • Can I return JSON from an .asmx Web Service if the ContentType is not JSON?

    - by Click Ahead
    I would like to post a form using ajax and jquery to a .asmx webservice and return the value from the webservice as JSON. I'm using ASP.NET 4.0. I know that in order to return JSON from a webservice the following needs to be set (1) dataType: "json" (2) contentType: "application/json; charset=utf-8", (3) type: "POST" (4) set the Data to something. I have tested this and it works fine (i.e. my webservice returns the data as JSON) if all *four are set*. But, lets say in my case I want to do a standard form post i.e. test1=value1&test2=value2 so the contentType is not JSON but I want back JSON {test1:value1}. This doesn't seem to work because the contentType is "application/x-www-form-urlencoded" not "application/json; charset=utf-8". Can anyone tell me why I can't do this? It seems crazy to me that you have to explicitly send JSON to get JSON back, yet if you don't use JSON (i.e. post urlencoded contenttype) then the webservice will return XML. Any insights are greatly appreciated :)

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  • Patterns for non-layered applications

    - by Paul Stovell
    In Patterns of Enterprise Application Architecture, Martin Fowler writes: This book is thus about how you decompose an enterprise application into layers and how those layers work together. Most nontrivial enterprise applications use a layered architecture of some form, but in some situations other approaches, such as pipes and filters, are valuable. I don't go into those situations, focussing instead on the context of a layered architecture because it's the most widely useful. What patterns exist for building non-layered applications/parts of an application? Take a statistical modelling engine for a financial institution. There might be a layer for data access, but I expect that most of the code would be in a single layer. Would you still expect to see Gang of Four patterns in such a layer? How about a domain model? Would you use OO at all, or would it be purely functional? The quote mentions pipes and filters as alternate models to layers. I can easily imagine a such an engine using pipes as a way to break down the data processing. What other patterns exist? Are there common patterns for areas like task scheduling, results aggregation, or work distribution? What are some alternatives to MapReduce?

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  • Guidelines regarding developing a flash web-site (especially loading - order swf, xml, etc...) ?

    - by shane.amon
    I would like to know, if you people out there could help me out, regarding the best practices or the a better way for creating a flash website... Actually I would like to know whether we should load the xml first and then the swf and other components or the other way round ? I am bit confused, even if anybody could refer some book to dig upon the steps or most common practices regarding the development... it would of great help... Thanks shane amon

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  • Web Part to Update a List Data in SharePoint

    - by DanSogaard
    I'm trying to write a web part that access lists and add items in a specific list. The user modifies the web part and type in List Name, the web part has 3 TextBoxs and a Button. The user should enter data and press the save button, that should update the list and add these data in a new record. I'm using the following code to build my web part, but the save button doesn't update the list. I don't know what's wrong it just reload the page and add nothing. Edit: BTW the list am trying to update has three columns, First Name, Last Name, and Email, respectively. using System; using System.Web; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Collections.Generic; using System.Text; using Microsoft.SharePoint; using Microsoft.SharePoint.Utilities; using Microsoft.SharePoint.WebControls; using Microsoft.SharePoint.WebPartPages; using Microsoft.SharePoint.Security; namespace TimeSheetEntry { public class TimesheetEntry : System.Web.UI.WebControls.WebParts.WebPart { public TimesheetEntry() { } protected TextBox txtFirstName; protected TextBox txtLastName; protected TextBox txtEmail; protected Button btnSave; protected string listName = string.Empty; [WebBrowsable(true), WebDisplayName("List Name"), WebDescription("Enter List Name"), Personalizable(PersonalizationScope.User)] public string LN { get { return this.listName; } set { this.listName = value; } } protected override void CreateChildControls() { //initialize textboxes txtFirstName = new TextBox(); txtLastName = new TextBox(); txtEmail = new TextBox(); //initialize button btnSave = new Button(); btnSave.Text = "Save"; btnSave.Click += new EventHandler(btnSave_Click); } protected override void Render(System.Web.UI.HtmlTextWriter writer) { writer.Write("<table width=100%>"); writer.Write("<tr>"); writer.Write("<td colspan=2>"); writer.Write("</td>"); writer.Write("</tr>"); writer.Write("<tr>"); writer.Write("<td>First:<span class=’ms-formvalidation’>*</span></td>"); writer.Write("<td>"); txtFirstName.RenderControl(writer); writer.Write("</td>"); writer.Write("</tr>"); writer.Write("<tr>"); writer.Write("<td>Last Name:<span class=’ms-formvalidation’>*</span></td>"); writer.Write("<td>"); txtLastName.RenderControl(writer); writer.Write("</td>"); writer.Write("</tr>"); writer.Write("<tr>"); writer.Write("<td>Email:<span class=’ms-formvalidation’>*</span></td>"); writer.Write("<td>"); txtEmail.RenderControl(writer); writer.Write("</td>"); writer.Write("</tr>"); writer.Write("<tr>"); writer.Write("<td>"); writer.Write("</td>"); writer.Write("<td>"); btnSave.RenderControl(writer); writer.Write("</td>"); writer.Write("</tr>"); writer.Write("</table>"); } public void btnSave_Click(object sender, EventArgs e) { SPWeb web = SPContext.Current.Web; SPList timesheetList = web.Lists[this.listName]; SPListItem newTimesheetEntry = timesheetList.Items.Add(); newTimesheetEntry["First Name"] = txtFirstName.Text; newTimesheetEntry["Last Name"] = txtLastName.Text; newTimesheetEntry["Email"] = txtEmail.Text; newTimesheetEntry.Update(); timesheetList.Update(); } } }

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  • How do you do A/B switching in a web app? (for deploying updates)

    - by stagas
    I currently have a mysite.com (A) which points to /public_html/ and a dev.mysite.com (B) which I created a /dev_html/ for that. I cloned the site but now I need a way of switching between them without having to copy all the files from one dir to another and without bringing the site down. I just want to switch the live site to B and then work on A, and when I finish, switch the live site to A and work on B. Is there a simple way? I'm using cPanel X and cPanel 11 (WHM VPS). Also, both can interact with the same database so that's not an issue as I'm not changing any database structure. Only the php/js/img files need to switch.

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  • How to build a web crawler to find a specific advert, which is in an iframe loaded by Javascript

    - by ZoFreX
    I'm trying to find all instances of an advert on a website. The advert is in an iframe which is loaded by javascript (it doesn't appear at all if javascript is turned off). Detecting the advert itself is extremely simple, both the name of the flash file and the target of the href always contain a certain string. What would be the best "starting point" for achieving this? At the moment I'm considering an Adobe AIR app, which could crawl the site and examine the DOM to find the ad, and would run javascript and load the content of the iframe. The other option I can think of is using Firefox as the platform (using maybe GreaseMonkey or Selenium? I don't really know how to leverage Firefox like this). Does anyone know of anything suitable to build this, or have any suggestions on using Firefox to do it? Extra details: Being CPU intensive isn't really an issue, nor is anything depending on a browser being open. This doesn't need to run on a headless server, it will be running on a powerful desktop box. OS is also not an issue. It would be advantageous if the crawler loaded each page multiple times, as the advert is in rotation. While the crawler does need to execute the javascript and load the content of the iframe, it does not need to be able to display flash files.

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  • How do I create a web service with rails?

    - by NotDan
    I have a silverlight application that needs to talk to a rails app to add a record. I have been able to get the silverlight app to successfully do the POST assuming everything goes good. Now, however, I need to be able to make it more robust and have the rails app return error/success messages to the silverlight app in a format it can read (xml maybe?). I can modify the rails app and silverlight app as needed. What is the best way to accomplish this with rails?

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  • 'e-Commerce' scalable database model

    - by Ruben Trancoso
    I would like to understand database scalability so I've just heard a talk about Habits of Highly Scalable Web Applications http://techportal.ibuildings.com/2010/03/02/habits-of-highly-scalable-web-applications/ On it, the presenter mainly talk about relational database scalability. I also have read something about MapReduce and Column oriented tables, big tables, hypertable etc... trying to understand which are the most up to date methods to scale web application data. But the second group, to me, is being hard to understand where it fits. It serves as transactional, reliable data store? or not, its just for large access and processing and to handle fine graned operations we will ever need to rely on RDBMSs? Could someone give a comprehensive landscape for those new technologies and how to use it?

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  • Is there a web service for real estate data?

    - by Jen
    I am looking to access an online database of real estate information (e.g. tax information and sales history for a particular address, lot size, square footage, BPOs, etc.). Companies such as RealQuest offer reports as a subscription service, but I'm looking to download the raw data, preferably in XML format (I don't want to parse the output since the presentation could change without notice). Are there any such services available?

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  • Block all content on a web page for people using an Adblock-type browser add-on/extension?

    - by Rudiger
    I wish to block ALL my content from any users using an ad-blocking browser extension (ie. Adblock Plus for Firefox, Adthwart for Chrome). How can I acheive this? Is there a server-side solution? Client-side? Edit 1 This question regards the detection of ad-blocking browser extensions: http://stackoverflow.com/questions/1185067/detecting-adblocking-software I'm concerned with post-detection action. Edit 2 A duplicate question was asked after mine, so I thought I'd link to it here: http://stackoverflow.com/questions/2002403/prevent-adblock-users-from-accessing-website

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  • How to access SharePoint web part properties?

    - by shannon.stewart
    I have created a feature for SharePoint 2007 that has a web part. I have added a custom property to the web part like so: [Personalizable(PersonalizationScope.Shared)] [WebBrowsable(true)] [Category("My Custom Properties")] [WebDisplayName("ServiceURL")] [WebDescription("The URL for the Wcf service")] public string ServiceURL { get; set; } Along with this web part, I've added a custom page that the web part will have a link to. I would like to reference the web part property from the custom page, but I don't know where these properties are stored. I've tried to access it using the code below, but both property collections don't have any properties stored. SPFeaturePropertyCollection spProperties = SPContext.Current.Site.Features[this.FeatureGuid].Properties; or SPFeaturePropertyCollection spProperties = SPContext.Current.Site.Features[this.FeatureGuid].Definition.Properties; My question is how can I get a reference to the web part property from other pages?

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  • Integrating 3rd-party forum software to member-based website

    - by john
    When using some existing forum software in a larger web-site, how easy is it to: 1)Make your site's login functionality log the user into the forum 2)Make your site's registration functionality create forum login data I suppose in a way it might be easier to ONLY use the forum's database for maintaining users, but that means trusting it with sensitive data. I'm planning an integration between an existing bespoke desktop app and a new bespoke web-site which should include forums. I don't know which forums will be used but I know the new web functionality won't be PHP-based. I figure that's not a big deal but I'm wondering if forums typically allow configuration of where they look for login data, to avoid duplicating this data into my DB and the forum DB.

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