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• Design question for WinForms (C#) app, using Entity Framework

  - by cdotlister

  I am planning on writing a small home budget application for myself, as a learning excercise. I have built my database (SQL Server), and written a small console application to interact with it, and test out scenarios on my database. Once I am happy, my next step would be to start building the application - but I am already wondering what the best/standard design would be. I am palnning on using Entity Framework for handling my database entities... then linq to sql/objects for getting the data, all running under a WinForms (for now) application. My plan (I've never used EF... and most of my development background is Web apps) is to have my database... with Entity Framework in it's own project.. which has the connection to the database. This project would expose methods such as 'GetAccount()', 'GetAccount(int accountId)' etc. I'd then have a service project that references my EF project. And on top of that, my GUI project, which makes the calls to my service project. But I am stuck. Lets say I have a screen that displays a list of Account types (Debit, Credit, Loan...). Once I have selected one, the next drop down shows a list of accounts I have that suite that account type. So, my OnChange event on my DropDown on the account type control will make a call to the serviceLayer project, 'GetAccountTypes()', and I would expect back a List< of Account Types. However, the AccountType object ... what is that? That can't be the AccountType object from my EF project, as my GUI project doesn't have reference to it. Would I have to have some sort of Shared Library, shared between my GUI and my Service project, with a custom built AccountType object? The GUI can then expect back a list of these. So my service layer would have a method: public List<AccountType> GetAccountTypes() That would then make a call to a custom method in my EF project, which would probably be the same as the above method, except, it returns an list of EF.Data.AccountType (The Entity Framework generated Account Type object). The method would then have the linq code to get the data as I want it. Then my service layer will get that object, and transform it unto my custom AccountType object, and return it to the GUI. Does that sound at all like a good plan?

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• Visual Studio project using the Quality Center API remains in memory

  - by Traveling Tech Guy

  Hi, Currently developing a connector DLL to HP's Quality Center. I'm using their (insert expelative) COM API to connect to the server. An Interop wrapper gets created automatically by VStudio. My solution has 2 projects: the DLL and a tester application - essentially a form with buttons that call functions in the DLL. Everything works well - I can create defects, update them and delete them. When I close the main form, the application stops nicely. But when I call a function that returns a list of all available projects (to fill a combo box), if I close the main form, VStudio still shows the solution as running and I have to stop it. I've managed to pinpoint a single function in my code that when I call, the solution remains "hung" and if I don't, it closes well. It's a call to a property in the TDC object get_VisibleProjects that returns a List (not the .Net one, but a type in the COM library) - I just iterate over it and return a proper list (that I later use to fill the combo box): public List<string> GetAvailableProjects() { List<string> projects = new List<string>(); foreach (string project in this.tdc.get_VisibleProjects(qcDomain)) { projects.Add(project); } return projects; } My assumption is that something gets retained in memory. If I run the EXE outside of VStudio it closes - but who knows what gets left behind in memory? My question is - how do I get rid of whatever calling this property returns? Shouldn't the GC handle this? Do I need to delve into pointers? Things I've tried: getting the list into a variable and setting it to null at the end of the function Adding a destructor to the class and nulling the tdc object Stepping through the tester function application all the way out, whne the form closes and the Main function ends - it closes, but VStudio still shows I'm running. Thanks for your assistance!

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• Can I copy the CollapsiblePanelExtender in jQuery as one method?

  - by Matthew Jones

  I am beginning the process of moving away from the AjaxControlToolkit and toward jQuery. What I want to do is have one function that duplicates the functionality of the CollapsiblePanelExtender. For a particular set of hyperlink and div, the code looks like this: $('#nameHyperLink').click(function() { var div = $('#nameDiv'); var link = $('#nameHyperLink'); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); What I really want to do is only have to write this function once, then use it for many (approx 40) instances throughout my website. Ideally what I want is this: function showHidePanel(divID,linkID,showText,hideText){ var div = $(divID); var link = $(linkID); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); I would then call this function from every HyperLink involved using OnClientClick. Is there a way to do this?

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• Using AesCryptoServiceProvider in VB.NET

  - by Collegeman

  My problem is actually a bit more complicated than just how to use AES in VB.NET, since what I'm really trying to do is use AES in VB.NET from within a Java application across JACOB. But for now, what I need to focus on is the AES implementation itself. Here's my encryption code Public Function EncryptAES(ByVal toEncrypt As String, ByVal key As String) As Byte() Dim keyArray = Convert.FromBase64String(key) Dim toEncryptArray = Encoding.Unicode.GetBytes(toEncrypt) Dim aes = New AesCryptoServiceProvider aes.Key = keyArray aes.Mode = CipherMode.ECB aes.Padding = PaddingMode.ISO10126 Dim encryptor = aes.CreateEncryptor() Dim encrypted = encryptor.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length) aes.Clear() Return encrypted End Function Once back in the Java code, I turn the byte array into a hexadecimal String. Now, to reverse the process, here's my decryption code Public Function DecryptAES(ByVal toDecrypt As String, ByVal key As String) As Byte() Dim keyArray = Convert.FromBase64String(key) Dim toDecryptArray = Convert.FromBase64String(toDecrypt) Dim aes = New AesCryptoServiceProvider aes.Key = keyArray aes.Mode = CipherMode.ECB aes.Padding = PaddingMode.ISO10126 Dim decryptor = aes.CreateDecryptor() Dim decrypted = decryptor.TransformFinalBlock(toDecryptArray, 0, toDecryptArray.Length) aes.Clear() Return decrypted End Function When I run the decryption code, I get the following error message Padding is invalid and cannot be removed.

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• Adding multiple star rating widgets to one page

  - by diglettpotato

  I am using this jQuery plugin for star ratings: http://orkans-tmp.22web.net/star_rating/ Everything is going great, including using AJAX, etc. The problem is that I need to have many per page and can't quite figure out how to work with the selectors to achieve this. I think this is probably very easy for someone who knows their jQuery... Here's some code below... There are multiple kids per page, and I need one rating widget for each kid. I can set up each #rat to be unique with a kid attached to it, like #1rat, #2rat, etc. But then how would I set up the function to be run on each of them independently? <script type="text/javascript"> $(function(){ var kidval=1; //this needs to be setup for each kid... not just 1 var uidval=1; $('#rat').children().not("select, #rating_title").hide(); var $caption = $('<div id="caption"/>'); $('#rat').stars({ inputType: "select", oneVoteOnly: false, callback: function(ui, type, value) { $("#"+kidval+"messages").text("Saving...").fadeIn(30); $.post("vote.php", {rate: value, kid: kidval, uid: uidval}, function(json) { $("#"+kidval+"messages").text("Average"); ui.select(Math.round(json.avg)); $caption.text(" (" + json.votes + " votes, " + json.avg + " avg)"); $("#"+kidval+"messages").text("Rated " + value + " Thanks!").stop().css("opacity", 1).fadeIn(30); setTimeout(function(){ $("#"+kidval+"messages").fadeOut(1000) }, 2000); }, "json"); } }); $('#rat').stars("selectID", -1); $caption.appendTo(#rat); $('<div id="'+kidval+'messages"/>').appendTo(#rat); });

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• algorithm to use to return a specific range of nodes in a directed graph

  - by GatesReign

  I have a class Graph with two lists types namely nodes and edges I have a function List<int> GetNodesInRange(Graph graph, int Range) when I get these parameters I need an algorithm that will go through the graph and return the list of nodes only as deep (the level) as the range. The algorithm should be able to accommodate large number of nodes and large ranges. Atop this, should I use a similar function List<int> GetNodesInRange(Graph graph, int Range, int selected) I want to be able to search outwards from it, to the number of nodes outwards (range) specified. So in the first function, I expect it to return the nodes placed in the blue box. The other function, if I pass the nodes as in the graph with a range of 1 and it starts at node 5, I want it to return the list of nodes that satisfy this criteria (placed in the orange box)

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• AJAX Callback and Javascript class variables assignments

  - by Gianluca

  I am trying to build a little javascript class for geocoding addresses trough Google Maps API. I am learning Javascript and AJAX and I still can't figure out how can I initialize class variables trough a callback: // Here is the Location class, it takes an address and // initialize a GClientGeocoder. this.coord[] is where we'll store lat/lng function Location(address) { this.geo = new GClientGeocoder(); this.address = address; this.coord = []; } // This is the geoCode function, it geocodes object.address and // need a callback to handle the response from Google Location.prototype.geoCode = function(geoCallback) { this.geo.getLocations(this.address, geoCallback); } // Here we go: the callback. // I made it a member of the class so it would be able // to handle class variable like coord[]. Obviously it don't work. Location.prototype.geoCallback = function(result) { this.coord[0] = result.Placemark[0].Point.coordinates[1]; this.coord[1] = result.Placemark[0].Point.coordinates[0]; window.alert("Callback lat: " + this.coord[0] + "; lon: " + this.coord[1]); } // Main function initialize() { var Place = new Location("Tokyo, Japan"); Place.geoCode(Place.geoCallback); window.alert("Main lat: " + Place.coord[0] + " lon: " + Place.coord[1]); } google.setOnLoadCallback(initialize); Thank you for helping me out!

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• Delayed "rendering" of WPF/Silverlight Dependency Properties?

  - by Aardvark

  Is there a way to know the first time a Dependency Property is accessed through XAML binding so I can actually "render" the value of the property when needed? I have an object (class derived from Control) that has several PointCollection Dependency Properties that may contain 100's or 1000's of points. Each property may arrange the points differently for use in different types shapes (Polyline, Polygon, etc - its more complicated then this, but you get the idea). Via a Template different XAML objects use TemplateBinding to access these properties. Since my object uses a Template I never know what XAML shapes may be in use for my object - so I never know what Properties they may or may not bind to. I'd like to only fill-in these PointCollections when they are actually needed. Normally in .NET I'd but some logic in the Property's getter, but these are bypassed by XAML data binding. I need a WPF AND Silverlight compatible solution. I'd love a solution that avoids any additional complexities for the users of my object.

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• Facebook Connect - logout issue

  - by Gublooo

  Hello I think I'm missing a very silly detail but the logout funtion of facebook connect is not working for me. I followed the steps posted in this answer by Typeoneerror but I cant get it to work. This is my logout javascript function function logout() { FB.init("API_KEY", "/xd_receiver.htm"); FB.Connect.logoutAndRedirect("/logout/url"); } When I click on it - nothing happens - In the browser status bar - For a second I see a message which says waiting for facebook - but I continue to stay on the same page. It does not redirect me nor does it log me out of facebook either. Just to see if the function is being called - I removed FB.init call from the function and then I get the error Error Message: 'FB.Connect' is null or not an object Any suggestions on how to debug this. Thanks a lot

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• Is Polymorphism and Method Overloading is almost the same thing in C++

  - by Maxood

  In C++, there are 2 types of Polymorphism: Object Polymorphism Function Polymorphism Function polymorphism is exactly the same thing as method or function overloading i.e. We use the same method names with different parameters and return types. Now the question is why do we have this fancy name Polymorphism in OOP? What distinctly distinguishes polymorphism from method overloading? Can someone explain with a scenario. Thanks

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• MS SQL SELECT stored procedure according to combobox.selectedvalue

  - by Jay

  Hello, In order to fill a datagridview according to the selectedvalue of a combobox I've tried creating a stored procedure. However, as I'm not 100% sure what I'm doing it, depending on the WHERE statement at the end of my stored procedure, either returns everything within the table or nothing at all. This is what's in my class: Public Function GetAankoopDetails(ByRef DisplayMember As String, ByRef ValueMember As String) As DataTable DisplayMember = "AankoopDetailsID" ValueMember = "AankoopDetailsID" If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function Public Function GetAankoopDetails() As DataTable If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function This is the function in the code behind the form I've written in order to fill the datagridview: Private Sub GridAankoopDetails_Fill() Try Me.Cursor = Cursors.WaitCursor dgvAankoopDetails.DataSource = Nothing _clsAankoopDetails.AankoopDetailsID = cboKeuze.SelectedValue dgvAankoopDetails.DataSource = _clsAankoopDetails.GetAankoopDetails Catch ex As Exception MessageBox.Show("An error occurred while trying to fill the data grid: " & ex.Message, "Oops!", MessageBoxButtons.OK) Finally Me.Cursor = Cursors.Default End Try End Sub And finally, this is my stored procedure: (do note that I'm not sure what I'm doing here) USE [Budget] GO /****** Object: StoredProcedure [dbo].[S_AankoopDetails] Script Date: 04/12/2010 03:10:52 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[S_AankoopDetails] ( @AankoopID int, @ReturnValue int output ) AS declare @Value int set @Value =@@rowcount if @Value = 0 begin SELECT dbo.tblAankoopDetails.AankoopDetailsID, dbo.tblAankoopDetails.AankoopID, dbo.tblAankoopDetails.ArtikelID, dbo.tblAankoopDetails.Aantal, dbo.tblAankoopDetails.Prijs, dbo.tblAankoopDetails.Korting, dbo.tblAankoopDetails.SoortKorting, dbo.tblAankoopDetails.UitgavenDeelGroepID FROM dbo.tblAankoopDetails INNER JOIN dbo.tblAankoop ON dbo.tblAankoopDetails.AankoopID = dbo.tblAankoop.AankoopID INNER JOIN dbo.tblArtikel ON dbo.tblAankoopDetails.ArtikelID = dbo.tblArtikel.ArtikelID INNER JOIN dbo.tblUitgavenDeelGroep ON dbo.tblAankoopDetails.UitgavenDeelGroepID = dbo.tblUitgavenDeelGroep.UitgavenDeelGroepID WHERE dbo.tblAankoopDetails.Deleted = 0 and dbo.tblAankoopDetails.AankoopID = @AankoopID ORDER BY AankoopID if @@rowcount >0 begin set @ReturnValue=999 end else begin set @ReturnValue=997 end end if @Value >0 begin --Dit wil zeggen dat ik een gebruiker wil ingeven die reeds bestaat. (998) set @ReturnValue=998 end Does anyone know what I'm need to do to resolve this? Kind regards, Jay

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• Canvas context used but not updated on canvas

  - by John Doe

  I am developing an small html5 game, where I have the following code: if(object.blocks){ var blocks = object.blocks, that = this; each(blocks,function(index){ that.blocks.push(new Block(this[index])); }); } I receive an object with some configuration and instantiate blocks with it. It works fine, but the Block class has an method, called draw: this.draw = function (ctx){ if(ctx){ var colors = ['#FF0000','#FFFF00','#0000FF','#00FF00'], color = Math.round(Math.random() * colors.length-1); ctx.fillStyle = colors[color]; ctx.fillRect(this.x,this.y,this.width,this.height); } }; It was working before I moved it into the Block class, but now it draws nothing. This is the code that calls draw: render: function(ctx){ each(this.blocks,function(index){ this[index].draw(ctx); }); } The context comes from the html page, from the main canvas.

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• event listeners on plugin in document.onload events in opera

  - by gf

  I am trying to understand an issue where event-listener registration on plugins doesn't work in Opera unless i delay them. In particular, this doesn't work: document.onload = function() { plugin.addEventListener("foo", function() { alert('onFoo'); }, false); } while delaying the addEventListener() call somewhat through e.g. an alert() does: document.onload = function() { alert('onload()'); plugin.addEventListener("foo", function() { alert('onFoo'); }, false); } It seems that plugins are only loaded after document.onload. As a non-web-developer, am i missing something simple here? Or is this a known Opera problem with a common work-around?

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• Lua - Iterate Through Table With nil Values

  - by Tony Trozzo

  My lua function receives a table that is of the array form: { field1, field2, nil, field3, } No keys, only values. I'm trying to convert this to a pseudo CSV form by grabbing all the fields and concatenating them into a string. Here is my function: function ArenaRewind:ConvertToCSV(tableName) csvRecord = "\n" for i,v in pairs(tableName) do if v == nil then v = "nil" end csvRecord = csvRecord .. "\"" .. v .. "\"" if i ~= #tableName then csvRecord = csvRecord .. "," end end return csvRecord end Not the prettiest code by any means, but it seems to iterate through them and grab all the non-nil values. The other table iteration function is ipairs() which stops as soon as it hits a nil value. Is there any easy way to grab all of these fields including the nil values? The tables are various sizes, so I hope to refrain from accessing each part like an array [i.e., tableName[1] through tableName[4]) and just grabbing the nil values that way. Thanks in advance.

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• How to group a complex list of objects using LINQ?

  - by Daoming Yang

  I want to select and group the products, and rank them by the number of times they occur. For example, I have an OrderList each of order object has a OrderProductVariantList(OrderLineList), and each of OrderProductVariant object has ProductVariant, and then the ProductVariant object will have a Product object which contains product information. A friend helped me with the following code. It could be compiled, but it did not return any value/result. I used the watch window for the query and it gave me "The name 'query' does not exist in the current context". Can anyone help me? Many thanks. var query = orderList.SelectMany( o => o.OrderLineList ) // results in IEnumerable<OrderProductVariant> .Select( opv => opv.ProductVariant ) .Select( pv => p.Product ) .GroupBy( p => p ) .Select( g => new { Product = g.Key, Count = g.Count() });

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• Linq-to-sql Compiled Query is caching result from disposed DataContext

  - by Vladimir Kojic

  Compiled query: public static Func<OperationalDataContext, short, Machine> QueryMachineById = CompiledQuery.Compile((OperationalDataContext db, short machineID) => db.Machines.Where(m => m.MachineID == machineID).SingleOrDefault()); It looks like compiled query is caching Machine object and returning the same object even if query is called from new DataContext (I’m disposing DataContext in the service but I’m getting Machine from previous DataContext). I use POCOs and XML mapping. Getting cached object from the same datacontext is ok, but when I call query with new DataContext I don’t want to get object from old datacontext. Is there something that I don’t do right ? Thanks, Vladimir

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• Scala: How to combine parser combinators from different objects

  - by eed3si9n

  Given a family of objects that implement parser combinators, how do I combine the parsers? Since Parsers.Parser is an inner class, and in Scala inner classes are bound to the outer object, the story becomes slightly complicated. Here's an example that attempts to combine two parsers from different objects. import scala.util.parsing.combinator._ class BinaryParser extends JavaTokenParsers { def anyrep: Parser[Any] = rep(any) def any: Parser[Any] = zero | one def zero: Parser[Any] = "0" def one: Parser[Any] = "1" } object LongChainParser extends BinaryParser { def parser1: Parser[Any] = zero~zero~one~one } object ShortChainParser extends BinaryParser { def parser2: Parser[Any] = zero~zero } object ExampleParser extends BinaryParser { def parser: Parser[Any] = (LongChainParser.parser1 ||| ShortChainParser.parser2) ~ anyrep def main(args: Array[String]) { println(parseAll(parser, args(0) )) } } This results to the following error: <console>:11: error: type mismatch; found : ShortChainParser.Parser[Any] required: LongChainParser.Parser[?] def parser: Parser[Any] = (LongChainParser.parser1 ||| ShortChainParser.parser2) ~ anyrep I've found the solution to this problem already, but since it was brought up recently on scala-user ML (Problem injecting one parser into another), it's probably worth putting it here too.

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• Error when changing default lanuage in asp.net compilation from vb to c#

  - by Herman

  Hi all, We have a updatable web site project that is written in c#, it has the usual web form implementation using master page, skins, user controls,...etc. Up to this point we neglect to change the default compilation language from VB to C#. However, the second we change it, we see the following error. Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at ASP.Default.__DataBinding__control499(Object sender, EventArgs e) at System.Web.UI.Control.OnDataBinding(EventArgs e) at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at System.Web.UI.Control.DataBindChildren() at System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) at .... Further investigation points out that this error is getting generated from a Theme related assembly (Source : App_Theme_Default.zclakrlo). Any ideas? One of my co-worker suggested that it might be skin file related since we have a theme call "Default" and there is no way to specify a language on a skin file. Therefore, when the asp.net runtime tries to compile it under C#, it will give a name collision? Does this make sense? Any help is appreciated.

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• Inheritance using prototype / "new"

  - by mikkol

  Hi I'm new in Javascript OO and want to know more about about inheritance. Hope you can provide some advice! I see this great post: How to "properly" create a custom object in JavaScript? which talks about how a class is inherited as I see in other websites, ex.: function man(x) { this.x = x; this.y = 2; } man.prototype.name = "man"; man.prototype.two = function() { this.y = "two"; } function shawn() { man.apply(this, arguments); }; shawn.prototype = new man; The above post claims that in order not to call "man"'s constructor while inheriting, one can use a helper like this instead: function subclassOf(base) { _subclassOf.prototype= base.prototype; return new _subclassOf(); } function _subclassOf() {}; shawn.prototype = subclassOf(man); While I understand its intention, I don't see why we can't call shawn.prototype = man.prototype; I see it works exactly the same. Or is there something I'm missing? Thanks in advance!

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• ws-xmlrpc claims error on part of service but other clients work fine

  - by mludd

  I've been trying to connect to an rTorrent instance using ws-xmlrpc and it just isn't going too well. Now, the URL I'm using is the same that I've been using when making sure that rTorrent's XMLRPC support is fine (which it appears to be since both a native OS X application and a small python script I threw together appear to be able to talk to it just fine without any errors). However, when I try using ws-xmlrpc to connect I get org.apache.xmlrpc.XmlRpcException: Failed to create input stream: Unexpected end of file from serverat the top of my stack trace followed by a bunch of steps down to: java.net.SocketException: Unexpected end of file from server at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:769) ... So basically, it seems that ws-xmlrpc is convinced that the reply from rTorrent is malformed somehow but other libraries apparently have no problem with it. The code I use to call rTorrent is: private Object callRTorrent(String command, Object[] params) { Object result = null; try { // xmlrpcclient is an XmlRpcClient object and is instantied in // the class constructor result = xmlrpcclient.execute(command, params); } catch(XmlRpcException xre) { System.out.println("Unable to execute method "+command); xre.printStackTrace(); } return result; } With command set to system.listMethodsand params set to an empty Object[]. From reading documentation and googling my conclusion is that I'm not doing anything obviously wrong and this problem doesn't appear to be common, so does anyone have a clue what's going on here?

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• Java generics parameters with base of the generic parameter

  - by Iulian Serbanoiu

  Hello, I am wondering if there's an elegant solution for doing this in Java (besides the obvious one - of declaring a different/explicit function. Here is the code: private static HashMap<String, Integer> nameStringIndexMap = new HashMap<String, Integer>(); private static HashMap<Buffer, Integer> nameBufferIndexMap = new HashMap<Buffer, Integer>(); // and a function private static String newName(Object object, HashMap<Object, Integer> nameIndexMap){ .... } The problem is that I cannot pass nameStringIndexMap or nameBufferIndexMap parameters to the function. I don't have an idea about a more elegant solution beside doing another function which explicitly wants a HashMap<String, Integer> or HashMap<Buffer, Integer> parameter. My question is: Can this be made in a more elegant solution/using generics or something similar? Thank you, Iulian

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• JavaScript recursion does not work properly

  - by misha-moroshko

  Hi, Could anyone say why the following recursive function does not work for me ? It should collect recursively all radio buttons in a given element. But, it does not found any for some reason !? Thanks !! <?xml version="1.0" encoding="Windows-1255"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <script type="text/javascript"> function AllInputs(radioElement) { this.radioInputs = ((arguments.length == 1) ? [radioElement] : []); } AllInputs.prototype.toString = function() { return "[object AllInputs: radioInputs: " + this.radioInputs.length + "]"; } AllInputs.prototype.add = function(otherAllInputs) { this.radioInputs = this.radioInputs.concat(otherAllInputs.radioInputs); } function getAllInputsOfElement(element) { if (element.tagName.toLowerCase() == "input") { if (element.getAttribute("type").toLowerCase() == "radio") { return new AllInputs(element); } else { return new AllInputs(); } } else { var result = new AllInputs(); for (i = 0; i < element.children.length; i++) { result.add(getAllInputsOfElement(element.children[i])); } return result; } } function main() { alert(getAllInputsOfElement(document.getElementById("MyTable"))); } </script> </head> <body onload="main()"> <table id="MyTable"> <tr><td>Day</td></tr> <tr><td> <input type="radio" name="DayOfTheWeek" value="1" /><label>Monday</label> <input type="radio" name="DayOfTheWeek" value="2" /><label>Tuesday</label> <input type="radio" name="DayOfTheWeek" value="3" /><label>Wednesday</label> </td></tr> </table> </body> </html>

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• A Question about .net Rfc2898DeriveBytes class?

  - by IbrarMumtaz

  What is the difference in this class? as posed to just using Encoding.ASCII.GetBytes(string object); I have had relative success with either approach, the former is a more long winded approach where as the latter is simple and to the point. Both seem to allow you to do the same thing eventually but I am struggling to the see the point in using the former over the latter. The basic concept I have been able to grasp is that you can convert string passwords into byte arrays to be used for e.g a symmetric encryption class, AesManaged. Via the RFC class but you get to use SaltValues and password when creating your rfc object. I assume its more secure but still thats an uneducated guess at best ! Also that it allows you to return byte arrays of a certain size, well something like that. heres a few examples to show you where I am coming from? byte[] myPassinBytes = Encoding.ASCII.GetBytes("some password"); or string password = "P@%5w0r]>"; byte[] saltArray = Encoding.ASCII.GetBytes("this is my salt"); Rfc2898DeriveBytes rfcKey = new Rfc2898DeriveBytes(password, saltArray); The 'rfcKey' object can now be used towards setting up the the .Key or .IV properties on a Symmetric Encryption Algorithm class. ie. RijndaelManaged rj = new RijndaelManaged (); rj.Key = rfcKey.Getbytes(rj.KeySize / 8); rj.IV = rfcKey.Getbytes(rj.Blocksize / 8); 'rj' should be ready to go ! The confusing part ... so rather than using the 'rfcKey' object can I not just use my 'myPassInBytes' array to help set-up my 'rj' object???? I have tried doing this in VS2008 and the immediate answer is NO ! but have you guys got a better educated answer as to why the RFC class is used over the other alternative I have mentioned above and why????

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• Need help with android WebView

  - by Jesse

  Hello, I am new to Android and java development. I create a WebView object in the OnCreate function. Now I need to be able to pass this same object to other functions in the code, such as the onOptionsItemSelected function. I currently have it where I just create a new WebView object in each function where I need it, but this slows down the code since it has to recreate it and such.

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• CMake missing environment variables errors

  - by Ben Crowhurst

  Hello, I'm attempting to use cmake on Mac OSX i've installed both a binary version and then also from source. However i continue to receive the following errors when attempting to create a Makefile. cpc1-dumb4-2-0-cust166:build bcrowhurst$ cmake . CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. Missing variable is: CMAKE_On_COMPILER_ENV_VAR CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly. Missing variable is: CMAKE_On_COMPILER CMake Error: Could not find cmake module file:/Users/bcrowhurst/NetBeansProjects/appon/build/CMakeFiles/CMakeOnCompiler.cmake CMake Error: Could not find cmake module file:CMakeOnInformation.cmake CMake Error: CMAKE_On_COMPILER not set, after EnableLanguage -- Boost version: 1.43.0 -- Found the following Boost libraries: -- system -- Configuring incomplete, errors occurred! My CMakeLists.txt is as follows: cmake_minimum_required( VERSION 2.6 ) project( Application On ) find_package( Boost COMPONENTS system REQUIRED ) link_directories( ${Boost_LIBRARY_DIRS} ) if(Boost_FOUND) include_directories( ${Boost_INCLUDE_DIRS} ) add_library( object ../source/object.cpp ../source/object.h ) target_link_libraries( object ${Boost_SYSTEM_LIBRARY} ) endif() Any help would be greatly appreciated. Thanks.

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