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  • can ServiceLocator.Current.GetInstance return null?

    - by mauricio076
    I have this piece of code (or similar) in many of our views: private IEventAggregator eventAggregator; Constructor() { eventAggregator = ServiceLocator.Current.GetInstance<IEventAggregator>(); ... } I read from this post that ServiceLocator.Current can throw NullReferenceException (bad thing on a constructor) but I was wondering if the GetInstance<() method can return null (or some other inconsistent object) making eventAggregator dangerous to use later in other methods. NOTE: I'm quite new to MVVM and WPF

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  • What defines "pythonian" or "pythonic"?

    - by Thomas Owens
    I want to begin to learn Python, and I've seen that phrase come up here before, but I don't know exactly what it means. I've read some websites on Python scripting, but I don't recall ever seeing that (but I could have just glanced over it). What exactly makes something "pythonian" or "pythonic"?

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  • how to resolve error in ubuntu

    - by Bipul
    i m using ubuntu 9.04. when i m running any command like sudo apt-get update ,i get following error message"E: Type 'l.com/ubuntu' is not known on line 45 in source list /etc/apt/sources.list E: The list of sources could not be read. ".due to this problem i m not able to download anything.please help

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  • Get remote file path location

    - by jungle_programmer
    Hi all, I am working with PHP and would like to get a remote file path location so that I can read file contents. I would like the user to direct to a particular file, which can be located anywhere in the computer, so that it can be processed by the script. Thanks

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  • Setting zoom level on mobile browser

    - by Zbyszek Swirski
    I am designing website for mobile access and I want to set page width, height and button sizes, so they display filling up the screen. For example if user is using HTC HD , the whole screen would be 480x800 with button sized 240x200. However IE mobile as well as Opera load the page with some zoom level, so the buttons display either too large or too small. How can I either read current zoom level in javascript or set it from javascript?

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  • Android: Replace a TabSpec Content

    - by Ally
    I have a TabHost with a bunch of tabs each with a TabSpec. I'd like to change the content of one of the TabSpecs but I don't seem to be able to. I've read a few places that it's not possible to change the content of a TabSpec. Does anyone know why I can add/remove tabs but not change the content of them? And can anyone suggest a workaround for this problem?

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  • ASP.NET web forms as ASP.NET MVC

    - by lopkiju
    I am sorry for possible misleading about the title, but I have no idea for a proper title. Feel free to edit. Anyway, I am using ASP.NET Web Forms, and maybe this isn't how web forms is intended to be used, but I like to construct and populate HTML elements manually. It gives me more control. I don't use DataBinding and that kind of stuff. I use SqlConnection, SqlCommand and SqlDataReader, set SQL string etc. and read the data from the DataReader. Old school if you like. :) I do create WebControls so that I don't have to copy-paste every time I need some control, but mostly, I need WebControls to render as HTML so I can append that HTML into some other function that renders the final output with the control inside. I know I can render a control with control.RenderControl(writer), but this can only be done in (pre)Render or RenderContents overrides. For example. I have a dal.cs file where is stored all static functions and voids that communicate with the database. Functions mostly return string so that it can be appended into some other function to render the final result. The reason I am doing like this is that I want to separate the coding from the HTML as much as I can so that I don't do <% while (dataReader.Read()) % in HTML and display the data. I moved this into a CodeBehind. I also use this functions to render in the HttpHandler for AJAX response. That works perfectly, but when I want to add a control (ASP.NET Server control (.cs extension, not .ascx)) I don't know how to do that, so I see my self writing the same control as function that returns string or another function inside that control that returns string and replaces a job that would RenderContents do, so that I can call that function when I need control to be appended into a another string. I know this may not be a very good practice. As I see all the tutorials/videos about the ASP.NET MVC, I think it suite my needs as with the MVC you have to construct everything (or most of it) by your self, which I am already doing right now with web forms. After this long intro, I want to ask how can I build my controls so I can use them as I mentioned (return string) or I have to forget about server controls and build the controls as functions and used them that way? Is that even possible with ASP.NET Server Controls (.cs extension) or am I right when I said that I am not using it right. To be clear, I am talking about how to properly use a web forms, but to avoid data binders because I want to construct everything by my self (render HTML in Code Behind). Someone might think that I am appending strings like "some " + "string", which I am not. I am using StringBuilder for that so there's no slowness. Every opinion is welcome.

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  • xmlhttprequest always return with status code 0 for firefox

    - by Neo
    hi, I am trying to make asynchronous calls using xmlhttprequest object so it completely works fine in internet explorer but for firefox it wont work a small code snippet of problem if (req.readyState == 4) { if (req.status == 200) //here firefox gives status code always 0 and for IE works fine { //read response } else { alert("There was a problem with the request."); } }

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  • Parsing an MS Project 2007 xml project file.

    - by fred-22
    Has anyone got any idea how to read the XML file saved by MS Project 2007? The standard binary format is .MPP but I'd like to view a project in a different viewer. I've saved the project spec as XML and the viewer I'm using needs the parent task Id for each task. Where can i find that in the rather huge amount of XML data created by ms project?

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  • file doesn't open using PHP fopen

    - by jesop
    i have tried this: <?php $fileip = fopen("test.txt","r"); ?> this should have opened the file in read only mood but it doesn't the test.txt file is in same folder as that of index.php (main project folder) the file doesn't open and when i put echo like : echo $fileip; it returned Resource id #3

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  • Memcached with Windows and .NET

    - by Funky81
    Is there anyone already implement memcached for production use in Windows environment? Because many blogs that I've read, it's not recommended to run memcached in Windows especially for production use, for example running memcached on windows. And one more thing, which memcached client that is good to use with c# and .net 3.5 ? I've found many alternate such as Memcached Providers @ Codeplex, Beitmemcached, and memcached provider @ Sourceforge

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  • Free CodeRush Express: worth the time?

    - by rp
    DevExpress has announced a free express version of CodeRush (for C# and VB.Net). http://blogs.microsoft.co.il/blogs/kim/archive/2008/10/28/coderush-for-free-coderush-xpress-for-visual-studio-announced.aspx I've read about CodeRush Pro and suspect that it is probably worth the money--but I've always had other things I needed to spend the money on. Is CodeRush Express worth the time and effort to download and learn to use. It's help file didn't install and I'm a little frustrated as to how to use it. Thanks, rp

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  • PHP Doctrine ORM NestedSet

    - by Roberto
    Hello, although I read through the manual here: http://www.doctrine-project.org/documentation/manual/1_2/hu/hierarchical-data I couldn't find a way to move a node from a Leaf to become a Root node. Any clues? The question is trivial for inserting a new node...but what about updating a node?

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  • How to update the text of a tag in XML using Elementree

    - by Christopher
    Using elementree, the easiest way to read the text of a tag is to do the following: import elementtree.ElementTree as ET sKeyMap = ET.parse("KeyMaps/KeyMap_Checklist.xml") host = sKeyMap.findtext("/BrowserInformation/BrowserSetup/host") Now I want to update the text in the same file, hopefully without having to re-write it with something easy like: host = "4444" sKeyMap.replacetext("/BrowserInformation/BrowserSetup/host") Any ideas? Thx in advance Christopher

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