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• How to preserve sibling element position when one sibling is absolutely positioned?

  - by Casey

  In the snippet below, the child div is normally positioned until it is :hovered , when it becomes absolutely positioned. The reasoning behind this markup is to simulate a popup style in a limited environment where I can't use a <select> (among other limitations). When child is hovered, the sibling elements jump around, which is expected, as the contents of the block have changed. But how can I preserve their positioning? That is, what CSS can I add to prevent the siblings from jumping around when child is hovered. Javascript is also not allowed, so please no answers using JS. HTML: <div class="container"> <div class="child"> <span class="d4"></span> <label><input type="radio" name="radio" value="1"/>One</label> <label><input type="radio" name="radio" value="2"/>Two</label> </div> <input type="text" name="sibling"/> <button name="sibling2">Button</button> </div> CSS: .container, .child, button { display:inline-block; } .child { vertical-align: middle; width: 35px; height: 35px; } .child:hover { background: gray; position:absolute; width: 100px; height: auto; } .child:hover > .d4 { display: none; } .child label { display:none; } .child:hover label { display: inline-block; } .d4 { background-position: -411px -1px; width: 35px; height: 35px; background-image: url("https://i.imgur.com/zkgyBOi.png"); background-repeat: no-repeat; color: transparent; display: inline-block; } Here's a fiddle: http://jsfiddle.net/cpctZ/1/

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• CSV File Content Display Issue

  - by Pankaj Khurana

  Hi, I want to retrieve contents from a csv file for that i am using following code: <?php $fo = fopen("record.csv", "rb+"); while(!feof($fo)) { $contents[] = fgetcsv($fo,0,';'); } print_r($contents); fclose($fo); ?> But my records are displayed in the following format: ????††???????†††??†††††????"Search Transactions Results" ††††??†???????††††?††††††??? ???????????? ?????????????? ?????????? My csv file format: "Search Transactions Results" "Transaction ID","Reference Transaction ID","Date","Type","Subject","Item Number","Item Name","Invoice ID","Name","Email","Shipping Name","Shipping Address Line 1","Shipping Address Line 2","Shipping Address City","Shipping State/Province","Shipping Zip/Postal Code","Shipping Address Country","Shipping Method","Address Status","Contact Phone Number","Gross Amount","Receipt ID","Custom Field","Option 1 Name","Option 1 Value","Option 2 Name","Option 2 Value","Note","Auction Site","Auction User ID","Item URL","Auction Closing Date","Insurance Amount","Currency","Fees","Net Amount","Shipping & Handling Amount","Sales Tax Amount","To Email","Time","Time Zone" "1T","",5/5/2010 2:10:44 PM,"Payment Processed","CFP Self Study Kit","1","CFP Self Study Kit","","User1","[email protected]","","","","","","","","","N","","68.18","R1","","","","","","","","","",,"","USD","-2.62","65.56","0","0","[email protected]","01:40","Asia/Calcutta" "2T","",5/19/2010 4:04:08 PM,"Payment Processed","CFP Self Study Kit","1","CFP Self Study Kit","","User2","[email protected]","","","","","","","","","N","","68.18","R2","","","","","","","","","",,"","USD","-2.62","65.56","0","0","[email protected]","03:34","Asia/Calcutta" "3T","1RT",5/19/2010 5:28:45 PM,"Currency Conversion Completed","","","",""," ","","","","","","","","","","N","","17492.6","","","","","","","","","","",,"","INR","0","17492.6","0","0","","04:58","Asia/Calcutta" "4T","2RT",5/19/2010 5:28:45 PM,"Currency Conversion Completed","","","",""," ","","","","","","","","","","N","","-393.36","","","","","","","","","","",,"","USD","0","-393.36","0","0","","04:58","Asia/Calcutta" "5T","",5/19/2010 5:28:45 PM,"Transfer to Bank Initiated","P1006","","P1006",""," ","","","","","","","","","","N","","-17492.6","","","","","","","","","","",,"","INR","0","-17492.6","0","0","","04:58","Asia/Calcutta" "6T","",5/20/2010 5:38:02 PM,"Transfer to Bank Completed","P1006","","P1006",""," ","","","","","","","","","","N","","-17492.6","","","","","","","","","","",,"","INR","0","-17492.6","0","0","","05:08","Asia/Calcutta" "7T","",5/21/2010 12:32:37 PM,"Payment Processed","FP - LVC Plus","","FP - LVC Plus","","User3","[email protected]","User3","NEW DELHI","BEHIND KARNATAKA BANK LD","SOUTH","NEW DELHI","110023","IN","","N","","283.96","","","","","","","","","","",,"","USD","-9.95","274.01","0","0","[email protected]","00:02","Asia/Calcutta" "8T","",5/25/2010 4:40:48 PM,"Transfer to Bank Initiated","P1006","","P1006",""," ","","","","","","","","","","N","","-12569.85","","","","","","","","","","",,"","INR","0","-12569.85","0","0","","04:10","Asia/Calcutta" "9T","3RT",5/25/2010 4:40:48 PM,"Currency Conversion Completed","","","",""," ","","","","","","","","","","N","","-274.01","","","","","","","","","","",,"","USD","0","-274.01","0","0","","04:10","Asia/Calcutta" "10T","4RT",5/25/2010 4:40:48 PM,"Currency Conversion Completed","","","",""," ","","","","","","","","","","N","","12569.85","","","","","","","","","","",,"","INR","0","12569.85","0","0","","04:10","Asia/Calcutta" "11T","",5/26/2010 4:57:39 PM,"Transfer to Bank Completed","P1006","","P1006",""," ","","","","","","","","","","N","","-12569.85","","","","","","","","","","",,"","INR","0","-12569.85","0","0","","04:27","Asia/Calcutta" "Total","-247.05 USD","-15.19","-262.24" "Total","0.00 INR","0.00","0.00" I want to retrieve the records where "Type"="Payment Processed". I want to retrieve content in a key value format that is for e.g. Transaction ID-1T as i have to store this values in a database but display is not proper. I am unable to find out the reason for the same please help me on this. Thanks

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• Wrapping a paragraph inside a div?

  - by LOD121

  How do I make my paragraph wrap inside my div? It is currently overflowing outside of the div and I have no idea how to stop the paragraph from overflowing over the edge. I do not want a scroll bar with: overflow: scroll; and the other overflow options don't seem to help here either... I have the following code: div { width: 1200px; margin: 0 auto; } .container { overflow: hidden; } .content { width: 1000px; float: left; margin-left: 0; text-align: left; } .rightpanel { width: 190px; float: right; margin-right: 0; } <div class="container"> <div class="content"> <p>Some content flowing over more than one line</p> </div> <div class="rightpanel"> <!-- content --> </div> </div> Edit: <div class="container"> <div class="content"> <div class="leftcontent"> </div> <div class="newsfeed"> <div class="newsitem"> <p>Full age sex set feel her told. Tastes giving in passed direct me valley as supply. End great stood boy noisy often way taken short. Rent the size our more door. Years no place abode in no child my. Man pianoforte too solicitude friendship devonshire ten ask. Course sooner its silent but formal she led. Extensive he assurance extremity at breakfast. Dear sure ye sold fine sell on. Projection at up connection literature insensible motionless projecting.<br><br>Be at miss or each good play home they. It leave taste mr in it fancy. She son lose does fond bred gave lady get. Sir her company conduct expense bed any. Sister depend change off piqued one. Contented continued any happiness instantly objection yet her allowance. Use correct day new brought tedious. By come this been in. Kept easy or sons my it done.</p> </div> </div> </div> <div class="rightpanel"> </div>

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• In a PHP project, how do you organize and access your helper objects?

  - by Pekka

  How do you organize and manage your helper objects like the database engine, user notification, error handling and so on in a PHP based, object oriented project? Say I have a large PHP CMS. The CMS is organized in various classes. A few examples: the database object user management an API to create/modify/delete items a messaging object to display messages to the end user a context handler that takes you to the right page a navigation bar class that shows buttons a logging object possibly, custom error handling etc. I am dealing with the eternal question, how to best make these objects accessible to each part of the system that needs it. my first apporach, many years ago was to have a $application global that contained initialized instances of these classes. global $application; $application->messageHandler->addMessage("Item successfully inserted"); I then changed over to the Singleton pattern and a factory function: $mh =&factory("messageHandler"); $mh->addMessage("Item successfully inserted"); but I'm not happy with that either. Unit tests and encapsulation become more and more important to me, and in my understanding the logic behind globals/singletons destroys the basic idea of OOP. Then there is of course the possibility of giving each object a number of pointers to the helper objects it needs, probably the very cleanest, resource-saving and testing-friendly way but I have doubts about the maintainability of this in the long run. Most PHP frameworks I have looked into use either the singleton pattern, or functions that access the initialized objects. Both fine approaches, but as I said I'm happy with neither. I would like to broaden my horizon on what is possible here and what others have done. I am looking for examples, additional ideas and pointers towards resources that discuss this from a long-term, real-world perspective. Also, I'm interested to hear about specialized, niche or plain weird approaches to the issue. Bounty I am following the popular vote in awarding the bounty, the answer which is probably also going to give me the most. Thank you for all your answers!

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• How to get Firefox to not continue to show "Transferring data from..." in browser status bar after a

  - by Edward Tanguay

  The following silverlight demo loads and displays a text file from a server. However, in Firefox (but not Explorer or Chrome) after you click the button and the text displays, the status bar continues to show "Transferring data from test.development..." which erroneously gives the user the belief that something is still loading. I've noticed that if you click on another Firefox tab and then back on the original one, the message goes away, so it seems to be just a Firefox bug that doesn't clear the status bar automatically. Is there a way to clear the status bar automatically in Firefox? or a way to explicitly tell it that the async loading is finished so it can clear the status bar itself? XAML: <UserControl x:Class="TestLoad1111.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <StackPanel Margin="10"> <StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Margin="0 0 0 10"> <Button Content="Load Text" Click="Button_LoadText_Click"/> </StackPanel> <TextBlock Text="{Binding Message}" /> </StackPanel> </UserControl> Code Behind: using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.ComponentModel; namespace TestLoad1111 { public partial class MainPage : UserControl, INotifyPropertyChanged { #region ViewModelProperty: Message private string _message; public string Message { get { return _message; } set { _message = value; OnPropertyChanged("Message"); } } #endregion public MainPage() { InitializeComponent(); DataContext = this; } private void Button_LoadText_Click(object sender, RoutedEventArgs e) { WebClient webClientTextLoader = new WebClient(); webClientTextLoader.DownloadStringAsync(new Uri("http://test.development:111/testdata/test.txt?" + Helpers.GetRandomizedSuffixToPreventCaching())); webClientTextLoader.DownloadStringCompleted += new DownloadStringCompletedEventHandler(webClientTextLoader_DownloadStringCompleted); } void webClientTextLoader_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { Message = e.Result; } #region INotifiedProperty Block public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) { handler(this, new PropertyChangedEventArgs(propertyName)); } } #endregion } public static class Helpers { private static Random random = new Random(); public static int GetRandomizedSuffixToPreventCaching() { return random.Next(10000, 99999); } } }

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• Create a Color Picker, similar to Photoshop's, using Javascript and HTML Canvas

  - by André Alçada Padez

  I am not at all versed in Computer Graphics and am in need of creating a color picker as a javascript tool to embed in an HTML page. First, and looking at Photoshop's one, i thought of the RGB palette as a three-dimensional matrix. My first attempt envolved: <script type="text/javascript"> var rgCanvas = document.createElement('canvas'); rgCanvas.width = 256; rgCanvas.height = 256; rgCanvas.style.border = '3px solid black'; for (g = 0; g < 256; g++){ for (r = 0; r < 256; r++){ var context = rgCanvas.getContext('2d'); context.beginPath(); context.moveTo(r,g); context.strokeStyle = 'rgb(' + r + ', ' + g + ', 0)'; context.lineTo(r+1,g+1); context.stroke(); context.closePath(); } } var bCanvas = document.createElement('canvas'); bCanvas.width = 20; bCanvas.height = 256; bCanvas.style.border = '3px solid black'; for (b = 0; b < 256; b++){ var context = bCanvas.getContext('2d'); context.beginPath(); context.moveTo(0,b); context.strokeStyle = 'rgb(' + 0 + ', ' + 0 + ', ' + b + ')'; context.lineTo(20, b); context.stroke(); context.closePath(); } document.body.appendChild(rgCanvas); document.body.appendChild(bCanvas); </script> this results in something like My thought is this is too linear, comparing to the ones i see in Photoshop and on the web. I would like to know the logic behind the color mapping in a picker like this: I don't really need the algorythms itself, i'm mainly trying to understand the logic. Thanks

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• How can I ignore an http request without clearing the browser?

  - by Timid Developer

  To prevent duplicate requests (i.e. pressing F5 right after clicking a command button), I've setup my page base class to ignore the request if it's detected as a duplicate. When I say 'ignore' I mean Response.End() Now I thought I've seen this work before, where there's an issue, I just Response.End() and the users page just does nothing. I don't know the exact circumstance in which this worked, but I'm unable to repeat it now. Now when I call Response.End(), I just get an empty browser. More specifically, I get this html. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=utf-8"></HEAD> <BODY></BODY></HTML> I setup the following test app to confirm the problem is not elsewhere in my app. Here it is: Add the following to an aspx form <asp:Label ID="lbl" Text="0" runat="server" /><br /> <asp:Button ID="btnAdd1" Text="Add 1" runat="server" /><br /> <asp:Button ID="btnAdd2" Text="Add 2" runat="server" /><br /> <asp:Button ID="btnAdd3" Text="Add 3" runat="server" /><br /> And here's the code behind file using System; namespace TestDupRequestCancellation { public partial class _Default : System.Web.UI.Page { protected void Page_Init(object sender, EventArgs e) { btnAdd1.Click += btnAdd1_Click; btnAdd2.Click += btnAdd2_Click; btnAdd3.Click += btnAdd3_Click; } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) CurrentValue = 0; else if (Int32.Parse(lbl.Text) != CurrentValue) Response.End(); } protected void Page_PreRender(object sender, EventArgs e) { lbl.Text = CurrentValue.ToString(); } protected int CurrentValue { get { return Int32.Parse(Session["CurrentValue"].ToString()); } set { Session["CurrentValue"] = value.ToString(); } } void btnAdd3_Click(object sender, EventArgs e) { CurrentValue += 3; } void btnAdd2_Click(object sender, EventArgs e) { CurrentValue += 2; } void btnAdd1_Click(object sender, EventArgs e) { CurrentValue += 1; } } } When you load the page, clicking any button does what is expected, but if you press F5 at any time after pressing one of the buttons, it will detect it as a duplicate request and call Response.End() which promptly ends the task. Which leaves the user with an empty browser. Is there anyway to leave the user with the page as it was, so they can just click a button? Also; please note that this code is the simplest code I could come up with to demonstrate my problem. It's not meant to demonstrate how to check for dup requests.

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• Serialization of non-required fields in protobuf-net

  - by David Hedlund

  I have a working java client that is communicating with Google, through ProtoBuf serialized messages. I am currently trying to translate that client into C#. I have a .proto file where the parameter appId is an optional string. Its default value in the C# representation as generated by the protobuf-net library is an empty string, just as it is in the java representation of the same file. message AppsRequest { optional AppType appType = 1; optional string query = 2; optional string categoryId = 3; optional string appId = 4; optional bool withExtendedInfo = 6; } I find that when I explicitly set appId to "" in the java client, the client stops working (403 Bad Request from Google). When I explicitly set appId to null in the java client, everything works, but only because hasAppId is being set to false (I'm uncertain as to how that affects the serialization). In the C# client, I always get 403 responses. I don't see any logic behind the distinction between not setting a value, and setting the default value, that seems to make all the difference in the java client. Since the output is always a binary stream, I am not sure if the successful java messages are being serialized with an empty string, or not serialized at all. In the C# client, I've tried setting IsRequired to true on the ProtoMember attribute, to force them to serialize, and I've tried setting the default value to null, and explicitly set "", so I'm quite sure I've tried some configuration where the value is being serialized. I've also played around with ProtoBuf.ProtoIgnore and at some point, removing the appId parameter altogether, but I haven't been able to avoid the 403 errors in C#. I've tried manually copying the serialized string from java, and that resolved my issues, so I'm certain that the rest of the HTTP Request is working, and the error can be traced to the serialized object. My serialization is simply this: var clone = ProtoBuf.Serializer.DeepClone(request); MemoryStream ms = new MemoryStream(2000); ProtoBuf.Serializer.Serialize(ms, clone); var bytearr = ms.ToArray(); string encodedData = Convert.ToBase64String(bytearr); I'll admit to not being quite sure about what DeepClone does. I've tried both with and without it...

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• Multi-Threading Question Concerning WPF

  - by Andrew

  Hello, I'm a newbie to threading, and I don't really know how to code a particular task. I would like to handle a mouse click event on a window that will kick off a while loop in a seperate thread. This thread, which is distinct from the UI thread, should call a function in the while loop which updates a label on the window being serviced by the UI thread. The while loop should stop running when the left mouse button is no longer being pressed. All the loop does is increment a counter, and then repeatedly call the function which displays the updated value in the window. The code for the window and all of the threading is given below (I keep getting some error about STA threading, but don't know where to put the attribute). Also, I'm hoping to use this solution, if it ever works, in another project that makes asynchronous calls elsewhere to a service via wcf, so I was hoping not to make any application-wide special configurations, since I'm really new to multi-threading and am quite worried about breaking other code in a larger program... Here's what I have: <Window x:Class="WpfApplication2.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfApplication2" Name="MyMainWindow" Title="MainWindow" Width="200" Height="150" PreviewMouseLeftButtonDown="MyMainWindow_PreviewMouseLeftButtonDown"> <Label Height="28" Name="CounterLbl" /> </Window> And here's the code-behind: using System.Windows; using System.Windows.Input; using System.Threading; namespace WpfApplication2 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { private int counter = 0; public MainWindow() { InitializeComponent(); } private delegate void EmptyDelegate(); private void MyMainWindow_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { Thread counterThread = new Thread(new ThreadStart(MyThread)); counterThread.Start(); } private void MyThread() { while (Mouse.LeftButton == MouseButtonState.Pressed) { counter++; Dispatcher.Invoke(new EmptyDelegate(UpdateLabelContents), null); } } private void UpdateLabelContents() { CounterLbl.Content = counter.ToString(); } } } Anyways, multi-threading is really new to me, and I don't have any experience implementing it, so any thoughts or suggestions are welcome! Thanks, Andrew

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• Recompiling an old fortran 2/4\66 program that was compiled for os\2 need it to run in dos

  - by Mike Hansen

  I am helping an old scientist with some problems and have 1 program that he found and modified about 20 yrs. ago, and runs fine as a 32 bit os\2 executable but i need it to run under dos! I am not a programmer but a good hardware & software man, so I'am pretty stupid about this problem, but here go's I have downloaded 6 different compilers watcom77,silverfrost ftn95,gfortran,2 versions of g77 and f80. Watcom says it is to old of program,find older compiler,silverfrost opens it,debugs, etc. but is changing all the subroutines from "real" to "complex" and vice-vesa,and the g77's seem to install perfectly (library links and etc.) but wont even compile the test.f programs.My problem is 1; to recompile "as is" or "upgrade" the code? PROGRAM xconvlv INTEGER N,N2,M PARAMETER (N=2048,N2=2048,M=128) INTEGER i,isign REAL data(n),respns(m),resp(n),ans(n2),t3(n),DUMMY OPEN(UNIT=1, FILE='C:\QKBAS20\FDATA1.DAT') DO 1 i=1,N READ(1,*) T3(i), data(i), DUMMY continue CLOSE(UNIT-1) do 12 i=1,N respns(i)=data(i) resp(i)=respns(i) continue isign=-1 call convlv(data,N,resp,M,isign,ans) OPEN(UNIT=1,FILE='C:\QKBAS20\FDATA9.DAT') DO 14 i=1,N WRITE(1,*) T3(i), ans(i) continue END SUBROUTINE CONVLV(data,n,respns,m,isign,ans) INTEGER isign,m,n,NMAX REAL data(n),respns(n) COMPLEX ans(n) PARAMETER (NMAX=4096) * uses realft, twofft INTEGER i,no2 COMPLEX fft (NMAX) do 11 i=1, (m-1)/2 respns(n+1-i)=respns(m+1-i) continue do 12 i=(m+3)/2,n-(m-1)/2 respns(i)=0.0 continue call twofft (data,respns,fft,ans,n) no2=n/2 do 13 i=1,no2+1 if (isign.eq.1) then ans(i)=fft(i)*ans(i)/no2 else if (isign.eq.-1) then if (abs(ans(i)) .eq.0.0) pause ans(i)=fft(i)/ans(i)/no2 else pause 'no meaning for isign in convlv' endif continue ans(1)=cmplx(real (ans(1)),real (ans(no2+1))) call realft(ans,n,-1) return END SUBROUTINE realft(data,n,isign) INTEGER isign,n REAL data(n) * uses four1 INTEGER i,i1,i2,i3,i4,n2p3 REAL c1,c2,hli,hir,h2i,h2r,wis,wrs DOUBLE PRECISION theta,wi,wpi,wpr,wr,wtemp theta=3.141592653589793d0/dble(n/2) cl=0.5 if (isign.eq.1) then c2=-0.5 call four1(data,n/2,+1) else c2=0.5 theta=-theta endif (etc.,etc., etc.) SUBROUTINE twofft(data,data2,fft1,fft2,n) INTEGER n REAL data1(n,data2(n) COMPLEX fft1(n), fft2(n) * uses four1 INTEGER j,n2 COMPLEX h1,h2,c1,c2 c1=cmplx(0.5,0.0) c2=cmplx(0.0,-0.5) do 11 j=1,n fft1(j)=cmplx(data1(j),data2(j) continue call four1 (fft1,n,1) fft2(1)=cmplx(aimag(fft1(1)),0.0) fft1(1)=cmplx(real(fft1(1)),0.0) n2=n+2 do 12 j=2,n/2+1 h1=c1*(fft1(j)+conjg(fft1(n2-j))) h2=c2*(fft1(j)-conjg(fft1(n2-j))) fft1(j)=h1 fft1(n2-j)=conjg(h1) fft2(j)=h2 fft2(n2-j)=conjg(h2) continue return END SUBROUTINE four1(data,nn,isign) INTEGER isign,nn REAL data(2*nn) INTEGER i,istep,j,m,mmax,n REAL tempi,tempr DOUBLE PRECISION theta, wi,wpi,wpr,wr,wtemp n=2*nn j=1 do 11 i=1,n,2 if(j.gt.i)then tempr=data(j) tempi=data(j+1) (etc.,etc.,etc.,) continue mmax=istep goto 2 endif return END There are 4 subroutines with this that are about 3 pages of code and whould be much easier to e-mail to someone if their able to help me with this.My e-mail is [email protected] , or if someone could tell me where to get a "working" compiler that could recompile this? THANK-YOU, THANK-YOU,and THANK-YOU for any help with this! The errors Iam getting are; 1.In a call to CONVLV from another procedure,the first argument was of a type REAL(kind=1), it is now a COMPLEX(kind=1) 2.In a call to REALFT from another procedure, ... COMPLEX(kind=1) it is now a REAL(kind=1) 3.In a call to TWOFFT from...COMPLEX(kind-1) it is now a REAL(kind=1) 4.In a previous call to FOUR1, the first argument was of a type REAL(kind=1) it is now a COMPLEX(kind=1).

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• Windows phone app xaml error

  - by thewarri0r9

  i am developing an app for windows phone 8 and i stuck on this code which visual studio showing invalid xaml. But Code compiles and works well. Invalid xaml Code is : <DataTemplate x:Key="AddrBookItemTemplate"> <StackPanel Margin="0,0,0,2" Orientation="Horizontal"> <StackPanel Width="80" Orientation="Horizontal" Height="80"> <Ellipse Margin="0" Height="70" Width="70" HorizontalAlignment="Left" Stroke="{x:Null}"> <Ellipse.Fill> <ImageBrush Stretch="Fill" ImageSource="{Binding imageBytes, Converter={StaticResource BytesToImageConverter}}"/> </Ellipse.Fill> </Ellipse> </StackPanel> <StackPanel Height="80" Margin="0" Width="380" HorizontalAlignment="Left"> <TextBlock FontWeight="Bold" Text="{Binding FirstName}" FontFamily="Segoe WP Semibold" FontSize="30" VerticalAlignment="Top" Margin="5,0,0,0" HorizontalAlignment="Left" /> <TextBlock Text="{Binding Phone}" FontFamily="Segoe WP" FontSize="24" Foreground="{StaticResource PhoneTextBoxReadOnlyBrush}" Margin="5,0,0,-12" Width="320" HorizontalAlignment="Left" VerticalAlignment="Top"/> </StackPanel> </StackPanel> </DataTemplate> I am serializing image by converting it to byte, it works fine but if image is null it gives an error. code behind: if (e.Results != null) { List<AddressBook> source = new List<AddressBook>(); foreach (var result in e.Results) { if (result.PhoneNumbers.FirstOrDefault() != null && result.GetPicture()!=null) { BitmapImage bmp = new BitmapImage(); BitmapImage nullbmp = new BitmapImage(); if (result.GetPicture() == null) { bmp.UriSource = new Uri(@"/Images/ci2.png", UriKind.RelativeOrAbsolute); } else { bmp.SetSource(result.GetPicture()); } listobj.Add(new AddressBook() { FirstName = result.DisplayName != null ? result.DisplayName : "", imageBytes = AddressBook.imageConvert(bmp), EmailAddress = "", LastName = "", Phone = result.PhoneNumbers.FirstOrDefault() != null ? result.PhoneNumbers.FirstOrDefault().PhoneNumber : "", }); } } Above code show an error "object reference not set to instance of an object". I want to show the default image (or color) in ellipse when image is null.What should I do?

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• CSS Z-Index with Gradient Background

  - by Jona

  I'm making a small webpage where the I would like the top banner with some text to remain on top, as such: HTML: <div id = "topBanner"> <h1>Some Text</h1> </div> CSS: #topBanner{ position:fixed; background-color: #CCCCCC; width: 100%; height:200px; top:0; left:0; z-index:900; background: -moz-linear-gradient(top, rgba(204,204,204,0.65) 0%, rgba(204,204,204,0.44) 32%, rgba(204,204,204,0.12) 82%, rgba(204,204,204,0) 100%); /* FF3.6+ */ background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(204,204,204,0.65)), color-stop(32%,rgba(204,204,204,0.44)), color-stop(82%,rgba(204,204,204,0.12)), color-stop(100%,rgba(204,204,204,0))); /* Chrome,Safari4+ */ background: -webkit-linear-gradient(top, rgba(204,204,204,0.65) 0%,rgba(204,204,204,0.44) 32%,rgba(204,204,204,0.12) 82%,rgba(204,204,204,0) 100%); /* Chrome10+,Safari5.1+ */ background: -o-linear-gradient(top, rgba(204,204,204,0.65) 0%,rgba(204,204,204,0.44) 32%,rgba(204,204,204,0.12) 82%,rgba(204,204,204,0) 100%); /* Opera 11.10+ */ background: -ms-linear-gradient(top, rgba(204,204,204,0.65) 0%,rgba(204,204,204,0.44) 32%,rgba(204,204,204,0.12) 82%,rgba(204,204,204,0) 100%); /* IE10+ */ background: linear-gradient(to bottom, rgba(204,204,204,0.65) 0%,rgba(204,204,204,0.44) 32%,rgba(204,204,204,0.12) 82%,rgba(204,204,204,0) 100%); /* W3C */ filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#a6cccccc', endColorstr='#00cccccc',GradientType=0 ); /* IE6-9 */ } /*WebPage Header*/ h1{ font-size:3em; color:blue; text-shadow:#CCCCCC 2px 2px 2px, #000 0 -1px 2px; position: absolute; width: 570px; left:50%; right:50%; line-height:20px; margin-left: -285px; z-index:999; } The z-index works fine, except that because I'm using a gradient any time I scroll down the elements behind the banner are still visible, albeit somewhat transparent. Is there any way to make them total invisible? i.e., what I'm trying to do is make it as though the banner is a solid color, even though it's a gradient. Thanks in advance for any help!

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• WPF: How to properly override the methods when creating custom control

  - by EV

  Hi, I am creating a custom control Toolbox that is derived from ItemsControl. This toolbox is supposed to be filled with icons coming from the database. The definition looks like this: public class Toolbox : ItemsControl { protected override DependencyObject GetContainerForItemOverride() { return new ToolboxItem(); } protected override bool IsItemItsOwnContainerOverride(object item) { return (item is ToolboxItem); } } Toolboxitem is derived from ContentControl. public class ToolboxItem : ContentControl { static ToolboxItem() { FrameworkElement.DefaultStyleKeyProperty.OverrideMetadata(typeof(ToolboxItem), new FrameworkPropertyMetadata(typeof(ToolboxItem))); } } Since the number of icons stored in a database is not known I want to use the data template: <DataTemplate x:Key="ToolBoxTemplate"> <StackPanel> <Image Source="{Binding Path=url}" /> </StackPanel> </DataTemplate> Then I want the Toolbox to use the template. <Toolbox x:Name="NewLibrary" ItemsSource="{Binding}" ItemTemplate="ToolBoxtemplate"> </Toolbox> I'm using ADO.NET entity framework to connect to a database. The code behind: SystemicsAnalystDBEntities db = new SystemicsAnalystDBEntities(); private void Window_Loaded(object sender, RoutedEventArgs e) { NewLibrary.ItemsSource = from c in db.Components select c; } However, there is a problem. When the code is executed, it displays the object from the database (as the ItemSource property is set to the object from the database) and not the images. It does not use the template. When I use the static images source it works in the right way I found out that I need to override the PrepareContainerForItemOverride method.But I don't know how to add the template to it. Thanks a lot for any comments. Additional Information Here is the ControlTemplate for ToolboxItem: <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}" /> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="true"> <Setter TargetName="Border" Property="Stroke" Value="Gray" /> </Trigger> </ControlTemplate.Triggers> </ControlTemplate>

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• Implementing a scalable and high-performing web app

  - by Christopher McCann

  I have asked a few questions on here before about various things relating to this but this is more of a consolidation question as I would like to check I have got the gist of everything. I am in the middle of developing a social media web app and although I have a lot of experience coding in Java and in PHP I am trying things a bit different this time. I have modularised each component of the application. So for example one component of the application allows users to private message each other and I have split this off into its own private messaging service. I have also created a user data service the purpose of which is to return data about the user for example their name, address, age etc etc from the database. Their is also another service, the friends service, which will work off the neo4j database to create a social graph. My reason for doing all this is to allow me up to update seperate modules when I need to - so while they mostly all run off MySQL right now I could move one to Cassandra later if I thought it approriate. The actual code of the web app is really just used for the final construction. The modules behind it dont really follow any strict REST or SOAP protocol. Basically each method on our API is turned into a PHP procedural script. This then may make calls to other back-end code which tends to be OO. The web app makes CURL requests to these pages and POSTs data to them or GETs data from them. These pages then return JSON where data is required. I'm still a little mixed up about how I actually identify which user is logged in at that moment. Do I just use sessions for that? Like if we called the get-messages.php script which equates to the getMessages() method for that user - returning all the private messages for that user - how would the back-end code know which user it is as posting the users ID to the script would not be secure. Anyone could do that and get all the messages. So I thought I would use sessions for it. Am I correct on this? Can anyone spot any other problems with what I am doing here? Thanks

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• How to find the one Label in DataList that is set to True

  - by Doug

  In my .aspx page I have my DataList: <asp:DataList ID="DataList1" runat="server" DataKeyField="ProductSID" DataSourceID="SqlDataSource1" onitemcreated="DataList1_ItemCreated" RepeatColumns="3" RepeatDirection="Horizontal" Width="1112px"> <ItemTemplate> ProductSID: <asp:Label ID="ProductSIDLabel" runat="server" Text='<%# Eval("ProductSID") %>' /> <br /> ProductSKU: <asp:Label ID="ProductSKULabel" runat="server" Text='<%# Eval("ProductSKU") %>' /> <br /> ProductImage1: <asp:Label ID="ProductImage1Label" runat="server" Text='<%# Eval("ProductImage1") %>' /> <br /> ShowLive: <asp:Label ID="ShowLiveLabel" runat="server" Text='<%# Eval("ShowLive") %>' /> <br /> CollectionTypeID: <asp:Label ID="CollectionTypeIDLabel" runat="server" Text='<%# Eval("CollectionTypeID") %>' /> <br /> CollectionHomePage: <asp:Label ID="CollectionHomePageLabel" runat="server" Text='<%# Eval("CollectionHomePage") %>' /> <br /> <br /> </ItemTemplate> </asp:DataList> And in my code behind using the ItemCreated event to find and set the label.backcolor property. (Note:I'm using a recursive findControl class) protected void DataList1_ItemCreated(object sender, DataListItemEventArgs e) { foreach (DataListItem item in DataList1.Items) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { Label itemLabel = form1.FindControlR("CollectionHomePageLabel") as Label; if (itemLabel !=null || itemLabel.Text == "True") { itemLabel.BackColor = System.Drawing.Color.Yellow; } } When I run the page, the itemLabel is found, and the color shows. But it sets the itemLabel color to the first instance of the itemLabel found in the DataList. Of all the itemLabels in the DataList, only one will have it's text = True - and that should be the label picking up the backcolor. Also: The itemLabel is picking up a column in the DB called "CollectionHomePage" which is True/False bit data type. I must be missing something simple... Thanks for your ideas.

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• approximating log10[x^k0 + k1]

  - by Yale Zhang

  Greetings. I'm trying to approximate the function Log10[x^k0 + k1], where .21 < k0 < 21, 0 < k1 < ~2000, and x is integer < 2^14. k0 & k1 are constant. For practical purposes, you can assume k0 = 2.12, k1 = 2660. The desired accuracy is 5*10^-4 relative error. This function is virtually identical to Log[x], except near 0, where it differs a lot. I already have came up with a SIMD implementation that is ~1.15x faster than a simple lookup table, but would like to improve it if possible, which I think is very hard due to lack of efficient instructions. My SIMD implementation uses 16bit fixed point arithmetic to evaluate a 3rd degree polynomial (I use least squares fit). The polynomial uses different coefficients for different input ranges. There are 8 ranges, and range i spans (64)2^i to (64)2^(i + 1). The rational behind this is the derivatives of Log[x] drop rapidly with x, meaning a polynomial will fit it more accurately since polynomials are an exact fit for functions that have a derivative of 0 beyond a certain order. SIMD table lookups are done very efficiently with a single _mm_shuffle_epi8(). I use SSE's float to int conversion to get the exponent and significand used for the fixed point approximation. I also software pipelined the loop to get ~1.25x speedup, so further code optimizations are probably unlikely. What I'm asking is if there's a more efficient approximation at a higher level? For example: Can this function be decomposed into functions with a limited domain like log2((2^x) * significand) = x + log2(significand) hence eliminating the need to deal with different ranges (table lookups). The main problem I think is adding the k1 term kills all those nice log properties that we know and love, making it not possible. Or is it? Iterative method? don't think so because the Newton method for log[x] is already a complicated expression Exploiting locality of neighboring pixels? - if the range of the 8 inputs fall in the same approximation range, then I can look up a single coefficient, instead of looking up separate coefficients for each element. Thus, I can use this as a fast common case, and use a slower, general code path when it isn't. But for my data, the range needs to be ~2000 before this property hold 70% of the time, which doesn't seem to make this method competitive. Please, give me some opinion, especially if you're an applied mathematician, even if you say it can't be done. Thanks.

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• How to created filtered reports in WPF?

  - by Michael Goyote

  Creating reports in WPF. I have two related tables. Table A-Customer: CustomerID(PK) Names Phone Number Customer Num Table B-Items: Products Price CustomerID I want to be able to generate a report like this: CustomerA Items Price Item A 10 Item B 10 Item C 10 --------------- Total 30 So this is what I have done: <Window x:Class="ReportViewerWPF.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:rv="clr-namespace:Microsoft.Reporting.WinForms; assembly=Microsoft.ReportViewer.WinForms" Title="Customer Report" Height="300" Width="400"> <Grid> <WindowsFormsHost Name="windowsFormsHost1"> <rv:ReportViewer x:Name="reportViewer1"/> </WindowsFormsHost> </Grid> Then I created a dataset and loaded the two tables, followed by a report wizard (dragged all the available fields and dropped them to the Values pane). The code behind the WPF window is this: public partial class CustomerReport : Window { public CustomerReport() { InitializeComponent(); _reportViewer.Load += ReportViewer_Load; } private bool _isReportViewerLoaded; private void ReportViewer_Load(object sender, EventArgs e) { if (!_isReportViewerLoaded) { Microsoft.Reporting.WinForms.ReportDataSource reportDataSource1 = new Microsoft.Reporting.WinForms.ReportDataSource(); HM2DataSet dataset = new HM2DataSet(); dataset.BeginInit(); reportDataSource1.Name = "DataSet";//This is the dataset name reportDataSource1.Value = dataset.CustomerTable; this.reportViewer1.LocalReport.DataSources.Add(reportDataSource1); this.reportViewer1.LocalReport.ReportPath = "../../Report3.rdlc"; dataset.EndInit(); HM2DataSetTableAdapters.CustomerTableAdapter funcTableAdapter = new HM2DataSetTableAdapters.CustomerTableAdapter(); funcTableAdapter.ClearBeforeFill = true; funcTableAdapter.Fill(dataset.CustomerTable); _reportViewer.RefreshReport(); _isReportViewerLoaded = true; } } As you might have guessed this loaded this list of customer with items and price: Customer Items Price Customer A Items A 10 Customer A Items B 10 Customer B Items D 10 Customer B Items C 10 How can I fine-tune this report to look like the one above, where the user can filter the customer he wants displayed on the report? Thanks in advance for the help. I would have preferred to use LINQ whenever filtering data

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• WPF multibound textblock not updating

  - by Superstringcheese

  I want to create a program which calculates how long it will take to repeat a process a certain number of times. I've scaled this down a lot for this example. So, I have some textboxes which are bound to properties in a class: Count: <TextBox x:Name="txtCount" Text="{Binding Count, Mode=TwoWay}" Width="50"/> Days: <TextBox x:Name="txtDays" Text="{Binding Days, Mode=TwoWay}" Width="50"/> and a textblock which is multibound like so: <TextBlock x:Name="tbkTotal"> <TextBlock.Text> <MultiBinding StringFormat="Days: {0}, Count: {1}"> <Binding Path="Days" /> /* This isn't updating */ <Binding Path="Count" /> </MultiBinding> </TextBlock.Text> </TextBlock> My DataContext is set in the Window1.xaml.cs file. public Window1() { InitializeComponent(); Sample sample = new Sample(); this.DataContext = sample; } I can update the multibound textblock with the Count property just fine, but the Days property always shows 0, even though the Days input accurately reflects changes. I believe that this is because my accessors are different for Days - namely, the Set method. This class is in a different file. public class Sample : INotifyPropertyChanged { private int _count; private TimeSpan _span; public int Count { get { return _count; } set { _count = value; NotifyPropertyChanged("Count"); /* Doesn't seem to be needed, actually */ } } public TimeSpan Span { get { return _span; } } /* The idea is to provide a property for Days, Hours, Minutes, etc. as conveniences to the inputter */ public double Days { get { return _span.Days; } set { TimeSpan ts = new TimeSpan(); double val = value > 0 ? value : 0; ts = TimeSpan.FromDays(val); _span.Add(ts); NotifyPropertyChanged("Span"); /* Here I can only get it to work if I notify that Span has changed - doesn't seem to be aware that the value behind Days has changed. */ } } private void NotifyPropertyChanged(string property) { if (null != this.PropertyChanged) { PropertyChanged(this, new PropertyChangedEventArgs(property)); } } public Sample() { _count = 0; _span = new TimeSpan(); } public event PropertyChangedEventHandler PropertyChanged; }

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• ASP.NET Elements are null when assigning data source

  - by deccks

  For some reason, all of the objects in my ASP.NET markup are now null when I try to assign values to their properties in the code behind. My project was going fine and then now when I try to assign a data source to a GridView, I get a null reference error. I have no idea why it's doing this. I am not doing nothing special. I am just trying to assign a value to a property to an asp.net element in on the page. The intellisense knows that the element is there and I get no errors when I build the project. It's just when I am running the website I get the null reference. I have been trying to fix this issue for a couple weeks now. Please Help. Thanks. Here is the code: protected void Page_PreRender(object sender, EventArgs e) { LoadData(); } private void LoadData() { Entities context = new Entities(); var types = (from t in context.CustomerTypes select t).OrderBy(t => t.TypeName); gvCustomerTypes.DataSource = types; gvCustomerTypes.DataBind(); } and on in the markup the gridview looks like this: <asp:GridView ID="gvCustomerTypes" runat="server" ShowHeader="true" GridLines="Both" AutoGenerateColumns="false" AlternatingRowStyle-BackColor="AliceBlue" Width="100%"> <Columns> <asp:TemplateField HeaderText="Customer Type Name" HeaderStyle-HorizontalAlign="Left" ItemStyle-HorizontalAlign="Left"> <ItemTemplate> <asp:Label ID="lblType" runat="server" Text='<%# Eval("TypeName") %>' /> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Edit" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:HyperLink ID="HyperLink1" NavigateUrl='<%#Eval("CustomerTypeID", "CreateEditCustomerType.aspx?ID={0}") %>' Text="Edit" runat="server" /> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Delete" HeaderStyle-HorizontalAlign="Center" ItemStyle-HorizontalAlign="Center"> <ItemTemplate> <asp:LinkButton ID="LinkButton1" CommandName='<%#Eval("CustomerTypeID") %>' OnClientClick="javascript:return confirm('Are you sure you want to delete this Customer Type?');" OnCommand="DeleteCustomerType" Text="Delete" runat="server" /> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView>

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• C#: My callback function gets called twice for every Sent Request

  - by Madi D.

  I've Got a program that uploads/downloads files into an online server,Has a callback to report progress and log it into a textfile, The program is built with the following structure: public void Upload(string source, string destination) { //Object containing Source and destination to pass to the threaded function KeyValuePair<string, string> file = new KeyValuePair<string, string>(source, destination); //Threading to make sure no blocking happens after calling upload Function Thread t = new Thread(new ParameterizedThreadStart(amazonHandler.TUpload)); t.Start(file); } private void TUpload(object fileInfo) { KeyValuePair<string, string> file = (KeyValuePair<string, string>)fileInfo; /* Some Magic goes here,Checking The file and Authorizing Upload */ var ftiObject = new FtiObject () { FileNameOnHDD = file.Key, DestinationPath = file.Value, //Has more data used for calculations. }; //Threading to make sure progress gets callback gets called. Thread t = new Thread(new ParameterizedThreadStart(amazonHandler.UploadOP)); t.Start(ftiObject); //Signal used to stop progress untill uploadCompleted is called. uploadChunkDoneSignal.WaitOne(); /* Some Extra Code */ } private void UploadOP(object ftiSentObject) { FtiObject ftiObject = (FtiObject)ftiSentObject; /* Some useless code to create the uri and prepare the ftiObject. */ // webClient.UploadFileAsync will open a thread that // will upload the file and report // progress/complete using registered callback functions. webClient.UploadFileAsync(uri, "PUT", ftiObject.FileNameOnHDD, ftiObject); } I got a callback that is registered to the Webclient's UploadProgressChanged event , however it is getting called twice per sent request. void UploadProgressCallback(object sender, UploadProgressChangedEventArgs e) { FtiObject ftiObject = (FtiObject )e.UserState; Logger.log(ftiObject.FileNameOnHDD, (double)e.BytesSent ,e.TotalBytesToSend); } Log Output: Filename: C:\Text1.txt Uploaded:1024 TotalFileSize: 665241 Filename: C:\Text1.txt Uploaded:1024 TotalFileSize: 665241 Filename: C:\Text1.txt Uploaded:2048 TotalFileSize: 665241 Filename: C:\Text1.txt Uploaded:2048 TotalFileSize: 665241 Filename: C:\Text1.txt Uploaded:3072 TotalFileSize: 665241 Filename: C:\Text1.txt Uploaded:3072 TotalFileSize: 665241 Etc... I am watching the Network Traffic using a watcher, and only 1 request is being sent. Some how i cant Figure out why the callback is being called twice, my doubt was that the callback is getting fired by each thread opened(the main Upload , and TUpload), however i dont know how to test if thats the cause. Note: The reason behind the many /**/ Comments is to indicate that the functions do more than just opening threads, and threading is being used to make sure no blocking occurs (there a couple of "Signal.WaitOne()" around the code for synchronization)

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• Why does this textbox binding example work in WPF but not in Silverlight?

  - by Edward Tanguay

  Why is it in the following silverlight application that when I: change the default text in the first textbox move the cursor to the second text box (i.e. take focus off first textbox) click the button that inside the button handler, it still has the old value "default text"? What do I have to do to get the binding to work in Silverlight? The same code works fine in WPF. XAML: <UserControl x:Class="TestUpdate123.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="640" d:DesignHeight="480"> <StackPanel Margin="10" HorizontalAlignment="Left"> <TextBox Text="{Binding InputText}" Height="200" Width="600" Margin="0 0 0 10"/> <StackPanel HorizontalAlignment="Left"> <Button Content="Convert" Click="Button_Convert_Click" Margin="0 0 0 10"/> </StackPanel> <TextBox Height="200" Width="600" Margin="0 0 0 10"/> <TextBlock Text="{Binding OutputText}"/> </StackPanel> </UserControl> Code Behind: using System.Windows; using System.Windows.Controls; using System.ComponentModel; namespace TestUpdate123 { public partial class MainPage : UserControl, INotifyPropertyChanged { #region ViewModelProperty: InputText private string _inputText; public string InputText { get { return _inputText; } set { _inputText = value; OnPropertyChanged("InputText"); } } #endregion #region ViewModelProperty: OutputText private string _outputText; public string OutputText { get { return _outputText; } set { _outputText = value; OnPropertyChanged("OutputText"); } } #endregion public MainPage() { InitializeComponent(); DataContext = this; InputText = "default text"; } private void Button_Convert_Click(object sender, RoutedEventArgs e) { OutputText = InputText; } #region INotifiedProperty Block public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { PropertyChangedEventHandler handler = PropertyChanged; if (handler != null) { handler(this, new PropertyChangedEventArgs(propertyName)); } } #endregion } }

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• Web SITE publishing, dynamic compilation, smoke & mirrors

  - by tbehunin

  When you publish a web SITE in Visual Studio, in the dialog box that follows, you are given an option to "Allow this precompiled site to be updatable". According to MSDN, checking this option "specifies that all program code is compiled into assemblies, but that .aspx files (including single-file ASP.NET Web pages) are copied as-is to the target folder". With this option checked, you can update existing .aspx files as well as add new ones without any issue. When a page, that has either been updated or newly created, is requested, the page gets dynamically compiled at run-time and is then processed and returned to the user. If, on the other hand, you didn't check that checkbox during the publish phase, the .aspx files get compiled, along with the code-behind and App_Code files in separate assemblies. The .aspx files are then completely overwritten with a line of text that says: This is a marker file generated by the precompilation tool, and should not be deleted! You obviously can't edit an existing page in this scenario. If you were to ADD a new .aspx file to this site, you would get a .Net run-time error saying that the file hasn't been precompiled. With that background, my questions are these: Something must be able to determine that this website was published to be updatable (allow dynamic compilation) or not. If it was published as updatable, it must also be able to determine whether a file was changed or added, so it can do a dynamic compile. Who makes those determinations? IIS? ASP.NET worker process? HOW does it make those determinations? If I had the same website published in both of those scenarios, could I make a visual determination that one is updatable and the other is not? Is there some bit I can look at in the assemblies using Reflector to make that determination myself? In addition to answering those questions, what also might be helpful would be information on the process flow from when a resource is requested to when it starts being processed, not necessarily the ASP.NET Page Lifecycle, but what happens BEFORE ASP.Net worker process starts processing the page and firing off events. The dynamic compilation appears to be smoke and mirrors. Can someone demystify this for me?

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• Any thoughts on how to create a true 'punch-out' area in a Sprite?

  - by rhtx

  I've been working on this for awhile, now. You might also call it a 'reverse mask', or an 'inverse mask'. Basically, I'm creating a view window within a display object. I need to allow objects on the stage that are under the window to be able to interact with the mouse. This is similar to a WPF question: http://stackoverflow.com/questions/740994/use-wpf-object-to-punch-hole-in-another, which has a much shorter write-up. I've got a Class called PunchOutShield, which creates a Sprite that covers the stage (or over some desired area). The Sprite's Graphics object is filled using the color and transparency of Flex's modal screen. The result is a screen that looks like the screen which appears behind a modal PopUp. PunchOutShield has a method called punch, which takes two arguments - the first is a Shape object, which defines the shape of the punch-through area; the second is a Point object, which indicates where to position the punch-through area. It took some experimenting, but I found that I can successfully create a punch-out area (i.e. - the modal screen does not display within the bounds of the given Shape). To do this, I set cacheAsBitmap to true on the Sprite that is used to create the modal screen, and also on the Shape object, which is added to the modal screen Sprite's displayList. If I set the blend mode of the Shape to ERASE, a completely transparent area is created in the modal screen. So far, great. The problem is that Shape does not subclass InteractiveObject, so there is no way to set mouseEnabled = false on it. And so, it prevents interaction between the mouse and any objects that are visible through the punch-out area. On top of that, InteractiveObject isn't available to look at, so I can't see if there is a way to borrow what it's doing to provide the mouseEnabled functionality and apply it to a subclass of Shape. I've tried using another Sprite object, rather than a Shape object, but the blending doesn't work out correctly. I'm not sure why there is a difference, but the Shape object seems to somehow combine with the parenting Sprite, allowing the ERASE blendMode to effect the desired punch-out visual appearance. It wouldn't be the end of the world if I had to draw up the screen with a series of rectangles so that the punch-out area was just simply not drawn, but that approach won't work if the punch-out area is complex. Or round. Any thoughts on this approach, or on an alternative approach?

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• apply style to range of text with javascript in uiwebview

  - by drawnonward

  I am displaying some simple styled text as html in a UIWebView on iPhone. It is basically a series of paragraphs with the occasional strong or emphasized phrase. At runtime I need to apply styles to ranges of text. There are a few similar scenarios, one of which is highlighting search results. If the user has searched for "something" I would like to change the background color behind occurrences of the word, then later restore the original background. Is it possible to apply styles to ranges of text using javascript? A key part of this is also being able to unset the styles. There seem to be two likely paths to follow. One would be modifying some html in Objective-C and passing it through javascript as the new innerHTML of some container. The other would be to use javascript to directly manipulate DOM nodes. I could manipulate html, but that sounds tedious in Objective-C so I would rather manipulate the DOM if that is a reasonable approach. I am not that familiar with javascript and DOM so I do not know if it is a reasonable approach. I wrote some routines to translate between text ranges and node ranges with offsets. So if I start with text range 100-200 and that starts in one paragraph and ends in a third, I can get the text nodes and the offsets within the nodes that represent the given text range. I just need a way to split a text node at an offset in the text. Currently I just apply styles to the paragraphs containing the text range. A few notes: straight javascript please, no external frameworks like jquery. the changes never need to be written to disk. the changes should be undoable or at least removable. the styles to apply already exist in a css file. it needs to work in iPhone 3.0 and forward. all the source files are shipped with the app. please be verbose. Thanks for any suggestions.

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• RadioButton checkedchanged event firing multiple times

  - by kash3

  Hi, I am trying to add multiple radiobutton columns to my gridview dynamically in the code and i want to implement some logic which involves database fetch in the checkedchanged event of radiobuttons but some how the checked changed event is being fired multiple times for each row. Following is the code: aspx: <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" BackColor="White" BorderColor="#CC9966" BorderStyle="None" EnableViewState="true" BorderWidth="1px" CellPadding="4" Font-Names="Verdana"> <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" /> <Columns> <asp:TemplateField HeaderText="Select One"> <ItemTemplate> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Select Two"> <ItemTemplate> </ItemTemplate> </asp:TemplateField> <asp:TemplateField> <ItemTemplate> <asp:Label ID="lblval" runat="server" Text="!" ForeColor="Red" Visible="false"/> </ItemTemplate> </asp:TemplateField> </Columns> **code behind** void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.DataItem != null) { DataRowView dvRowview = (DataRowView)e.Row.DataItem; int currentRow = GridView1.Rows.Count; RadioButton rdoSelect1 = new RadioButton(); rdoSelect1.GroupName = "Select" + currentRow; rdoSelect1.ID = string.Concat("rdoSelect1", currentRow); rdoSelect1.AutoPostBack = true; rdoSelect1.CheckedChanged += new EventHandler(rdoSelect_CheckedChanged); e.Row.Cells[0].Controls.Add(rdoSelect1); RadioButton rdoSelect2 = new RadioButton(); rdoSelect2.GroupName = "Select" + currentRow; rdoSelect2.ID = string.Concat("rdoSelect2", currentRow); rdoSelect2.AutoPostBack = true; rdoSelect2.CheckedChanged += new EventHandler(rdoSelect_CheckedChanged); e.Row.Cells[1].Controls.Add(rdoSelect2); if (!IsPostBack) { e.Row.Cells[e.Row.Cells.Count - 1].Controls[1].Visible = false; if (e.Row.Cells[0] != null && Convert.ToBoolean(dvRowview["Select1"]) == true) rdoSelect1.Checked = true; else rdoSelect1.Checked = false; if (e.Row.Cells[0] != null && Convert.ToBoolean(dvRowview["Select2"]) == true) rdoSelect2.Checked = true; else rdoSelect2.Checked = false; } } } void rdoSelect_CheckedChanged(object sender, EventArgs e) { RadioButton rdoSelectedOption = (RadioButton)sender; GridViewRow selRow = rdoSelectedOption.NamingContainer as GridViewRow; if (rdoSelectedOption.Checked) selRow.Cells[selRow.Cells.Count - 1].Controls[1].Visible = true; else selRow.Cells[selRow.Cells.Count - 1].Controls[1].Visible = false; } i want the checkedchanged event to fire only once for a group name and row.

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