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• Ado.net performance:What does SNIReadSync do?

  - by Beatles1692

  We have a query that takes 2 seconds to run in Sql Server Management Studio but it takes 13 seconds to be shown on a client screen. I used dotTrace to profile my source code and noticed there is this SNIReadSync method (part of ADO.net assemblies)that takes a lot of time to do its job(9 seconds).I ran my source over server so I could omit the network effects and the result was the same. It doesn't matter if I'm using OleDBConnection or SqlConnection. It doesn't matter if I'm using a DataReader or a DataSet. Connection pooling does not solve this issue(as my result shows). I googled this issue and I couldn't find an answer to the question that what this method is actually doing and how we can improve it. here's what I found on StakOverFlow that's not helpful either: http://stackoverflow.com/questions/1610874/snireadsync-executing-between-120-500-ms-for-a-simple-query-what-do-i-look-for

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• Asynchronous Html.ImageGetter for setting multiple images in a TextView

  - by thedude19

  I'm writing an application that takes HTML pages and parses them to display on the screen. Specifically, this application pulls HTML from a message board and lists posts made by users. The problem is that a lot of the content in posts are pictures in <img> tags, so I need to write a Html.ImageGetter to handle the downloading of the images. My textView.setText() method will look like this: myTextView.setText(Html.fromHtml(myText, new ImageGetter() { @Override public Drawable getDrawable(String source) { Drawable d; // Need to async download image here return d; } }, null)); Doing this synchronously is trivial, but is there a suggested way to do this asynchronously so that it doesn't lock up my UI thread? I would also like to eventually build in caching of these images, but I imagine that would be pretty simple once the async downloading was there.

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• Delay rendering or force re-rendering in Flex

  - by Tereno

  Hi there, In my Flex application, using a custom control, I am making a JSON request to grab some data from the server. My rendering depends on this data such as knowing how many boxes to draw. How can I either force the rendering to wait until I've got the data before drawing to screen or have the boxes draw once we receive the data? I have an event listener for Event.COMPLETE for my JSON request and in there, I call methods that add to the control. I've tried invalidateDisplayList but that doesn't seem to do anything for me?

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• Handle existing instance of root activity when launching root activity again from intent filter

  - by Robert

  Hi, I'm having difficulties handling multiple instances of my root (main) activity for my application. My app in question has an intent filter in place to launch my application when opening an email attatchment from the "Email" app. My problem is if I launch my application first through the the android applications screen and then launch my application via opening the Email attachment it creates two instances of my root activity. steps: Launch root activity A, press home Open email attachment, intent filter triggers launches root activity A Is it possible when opening the Email attachment that when the OS tries to launch my application it detects there is already an instance of it running and use that or remove/clear that instance?

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• How to follow user location with MapKit

  - by Bloudermilk

  I'm using MapKit to display the user's location relative to pins around them. I'd like to be able to mimic the functionality that Maps provides via the crosshair button in the lower left-hand corner of the screen. I'm already aware that MapKit provides a CLLocation object with the user's location via MKUserLocation, I just wanted to seek advice on how I should keep focus on that location. My initial inclination was to use an NSTimer to center the map on that coordinate every 500ms or so. Is there a better way to do this? Is there something built in to MapKit that I'm missing that will accomplish this? Thanks so much, Brendan

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• How to draw an UIImageView in -drawRect:?

  - by mystify

  I'm trying since 5 hours now: - (void)drawRect:(CGRect)rect { // flip the wrong coordinate system CGContextTranslateCTM(context, 0.0f, rect.size.height); //shift the origin up CGContextScaleCTM(context, 1.0f, -1.0f); //flip the y-axis CGContextDrawImage(context, myImgView.frame, myImageView.image.CGImage); } The problem: While the image draws correctly, the coordinates specified by the UIImageView frame are completely useless. The image appears placed completely wrong on screen. I guess I must also flip the CGRect of the UIImageView? But how?

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• Overlay WriteableBitmap with color

  - by rajenk

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

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• What is an Efficient algorithm to find Area of Overlapping Rectangles

  - by namenlos

  My situation Input: a set of rectangles each rect is comprised of 4 doubles like this: (x0,y0,x1,y1) they are not "rotated" at any angle, all they are "normal" rectangles that go "up/down" and "left/right" with respect to the screen they are randomly placed - they may be touching at the edges, overlapping , or not have any contact I will have several hundred rectangles this is implemented in C# I need to find The area that is formed by their overlap - all the area in the canvas that more than one rectangle "covers" (for example with two rectangles, it would be the intersection) I don't need the geometry of the overlap - just the area (example: 4 sq inches) Overlaps shouldn't be counted multiple times - so for example imagine 3 rects that have the same size and position - they are right on top of each other - this area should be counted once (not three times) Example The image below contains thre rectangles: A,B,C A and B overlap (as indicated by dashes) B and C overlap (as indicated by dashes) What I am looking for is the area where the dashes are shown - AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAA--------------BBB AAAAAAAAAAAAAAAA--------------BBB AAAAAAAAAAAAAAAA--------------BBB AAAAAAAAAAAAAAAA--------------BBB BBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBB BBBBBB-----------CCCCCCCC BBBBBB-----------CCCCCCCC BBBBBB-----------CCCCCCCC CCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCC CCCCCCCCCCCCCCCCCCC

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• Merge FDF data into a PDF file using PHP

  - by James

  Is it possible to merge FDF data with a PDF file using PHP alone? Or is there no option but to use a 3rd party command line tool to achieve this? If that is the case can someone point me in the direction of one? I am currently outputting the FDF file to the browser in the hope that it will redirect the user to the filled in PDF but for some people that is not the case. The FDF contents is being output to the screen, even though I am using header('Content-type: application/vnd.fdf');

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• WPF DataGrid: How to reset column width when applying new ItemsSource

  - by paul

  I am using a DataGrid to display details of an item selected in a ListBox. The DataGrid has 3 columns set to Width="Auto". As different items in the ListBox are selected, the width of the columns in the DataGrid increase as needed in order to display the text. What I want is that the column widths also decrease when the extra width is not needed. An example. Column 1 normally contains a percent value. However, in some cases it contains a long error message which causes column 1 to widen and push columns 2 & 3 off the screen. When I switch to an item containing normal values, I want column 1 to regain its' normal width and for columns 2 & 3 to be visible again. What can I do to force the column widths to take the minimum size?

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• How to record an iPad screencast

  - by hgpc

  How do you record an iPad screencast at full scale? I have an iMac with maximum resolution 1680x1050 and the simulator doesn't fit the screen in portrait orientation. It does fit in landscape orientation. Reducing the scale to 50% is not an option because the end result is too small. If the scale could be reduced slightly it would be fine, but not 50%. Is it possible to put the simulator in landscape orientation and still keep the app in portrait mode? Then I could simply rotate the resulting video to get a portrait screencast.

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

  - by user308444

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

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• MySQL Interview Questions

  - by Campbell

  Hi, I've been asked to screen some candidates for a MySQL DBA / Developer position for a role that requires an enterprise level skill set. I myself am a SQL Server person so I know what I would be looking for from that point of view with regards to scalability / design etc but is there anything specific I should be asking with regards to MySQL? I would ideally like to ask them about enterprise level features of MySQL that they would typically only use when working on a big database. Need to separate out the enterprise developers from the home / small website kind of guys. Thanks.

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• Facebook Graph Api doesn't redirect to my callback

  - by Pentium10

  I am following the steps to do the authorization as described here, but I am not redirected to my callback url. I get the following five steps after calling the first one: https://graph.facebook.com/oauth/authorize?display=touch&client_id=...&redirect_uri=... https://www.facebook.com/connect/uiserver.php?display=touch&client_id=...&redirect_uri=...&next=https://graph.facebook.com/oauth/authorize_success?display=touch&client_id=...&redirect_uri=...&type=web_server&cancel_url=https://graph.facebook.com/oauth/authorize_cancel?display=touch&client_id=...&redirect_uri=...&method=permissions.request&return_session=1 http://www.facebook.com/ http://touch.facebook.com/?w2m http://touch.facebook.com/login.php?next=http://touch.facebook.com/?w2m&cancel=http://touch.facebook.com/?w2m&fbconnect=0&r39c26cf0&refid=108 As you see the 5th steps just displays the login screen. If I log in, or I am already logged in I am presented with the home page. I use my application key, and the connect url of the app I've setup in FB Developers page. What I am doing wrong, why I am not redirected to my url?

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• How to post Source Code inside a Wordpress blog post

  - by jasondavis

  I just started a coding related wordpress bog to basicly discuss topics and store code snippets in. I installed a code syntax highlighter plugin which is very nice but I am having a problem. I just tried posting my first code related blog post and wordpress seems to only post some of my code and then it makes some of it not show, like it filters some of it out even though I am wrapping it in tags like this.. <pre class="brush:php"> <?PHP my code ?> </pre> Some of my code works and some gets filtered out somehow. I know this is possible as many wordpress coding sites show source code. Do I need to modify something to make it work in wordpress? UPDATE I have confirmed that it does save ALL my code into the database it just filters it out when it try to print to screen, so when I go in to edit the post and textbox populates with ALL the source code intact

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• WPF ListView column auto sizing

  - by Diego Mijelshon

  Let's say I have the following ListView: <ListView ScrollViewer.VerticalScrollBarVisibility="Auto"> <ListView.View> <GridView> <GridViewColumn Header="Something" DisplayMemberBinding="{Binding Path=ShortText}" /> <GridViewColumn Header="Description" DisplayMemberBinding="{Binding Path=VeryLongTextWithCRs}" /> <GridViewColumn Header="Something Else" DisplayMemberBinding="{Binding Path=AnotherShortText}" /> </GridView> </ListView.View> </ListView> I'd like the short text columns to always fit in the screen, and the long text column to use the remaining space, word-wrapping if necessary. Is that possible?

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• Python recursion , Sierpinski triangle with color at each depth

  - by ???? ???

  import turtle w=turtle.Screen() def Tri(t, order, size): if order==0: t.forward(size) t.left(120) t.forward(size) t.left(120) t.forward(size) t.left(120) else: t.pencolor('red') Tri(t, order-1, size/2, color-1) t.fd(size/2) t.pencolor('blue') Tri(t, order-1, size/2, color-1) t.fd(size/2) t.lt(120) t.fd(size) t.lt(120) t.fd(size/2) t.lt(120) t.pencolor('green') Tri(t, order-1, size/2,color-1) t.rt(120) t.fd(size/2) t.lt(120) can anyone help with this problem ? i want to a sierpinski triangle that have color at specific depth like this http://openbookproject.net/thinkcs/python/english3e/_images/sierpinski_color.png i dont know how to make the the triangle color change at specific depth

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• Recommendation for high performance WPF Chart

  - by Ajaxx

  We're working on a WPF-based desktop application that charts financial markets information (candlestick charts, overlayed indicator curves, volume, etc). The charts are displayed in real-time with responses to market ticks being shown in real-time (updating one to two times per second is probably a reasonable display refresh policy). We've been looking for a software package (commercial is fine by us) that has the capability of displaying these charts. Additionally, we'd like to have an approach that can render the initial amount of data in a reasonable timeframe (give or take 100-200ms from the time we hand the data over to a complete render on screen). Also we view multiple charts (5-10) simultaneously so a solution that chews up 50% of my CPU to display one chart really isn't going to work well. Has anyone had any good experiences with charting controls. We've had to hand roll the last few charts we've done and I'd prefer not to do it again. Solutions that can make use of the GPU to minimize CPU utilization would be nice as well.

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• Best way of implementing DropDownList in ASP.NET MVC 2?

  - by Kelsey

  I am trying to understand the best way of implementing a DropDownList in ASP.NET MVC 2 using the DropDownListFor helper. This is a multi-part question. First, what is the best way to pass the list data to the view? Pass the list in your model with a SelectList property that contains the data Pass the list in via ViewData How do I get a blank value in the DropDownList? Should I build it into the SelectList when I am creating it or is there some other means to tell the helper to auto create an empty value? Lastly, if for some reason there is a server side error and I need to redisplay the screen with the DropDownList, do I need to fetch the list values again to pass into the view model? This data is not maintained between posts (at least not when I pass it via my view model) so I was going to just fetch it again (it's cached). Am I going about this correctly?

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• UIScrollView subviews not showing at first

  - by igul222

  I created a custom UIScrollView subclass that works a like a UITableView, keeping a collection of subviews and re-using them whenever the user scrolls. It's implemented like this: -(void)layoutSubviews { for(UIView *subview in [self subviews]) [subview removeFromSuperview]; // then re-add subviews after changing the frame and some attributes } This works fine with simple UIViews, but when I try to do it with a UIView that has a UILabel subview, the "base" view appears fine, but the UILabel doesn't show up at all. I can get the UILabel to show up by scrolling the entire UIView off screen and then bringing it back on. What could be causing this? So far, I've tried calling [myUIView setNeedsLayout], [myUIView setNeedsDisplay], and [myUIView layoutIfNeeded] from various places. None of them worked, and the last one crashed my app. I've also done the same thing to myUIScrollViewSubclass, with similar results.

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• multy threading wpf

  - by Eran

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

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• multi threading wpf

  - by Eran

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

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• How do you draw like a Crayon?

  - by Simucal

  Crayon Physics Deluxe is a commercial game that came out recently. Watch the video on the main link to get an idea of what I'm talking about. It allows you to draw shapes and have them react with proper physics. The goal is to move a ball to a star across the screen using contraptions and shapes you build. While the game is basically a wrapper for the popular Box2D Physics Engine, it does have one feature that I'm curious about how it is implemented. Its drawing looks very much like a Crayon. You can see the texture of the crayon and as it draws it varies in thickness and darkness just like an actual crayon drawing would look like. The background texture is freely available here. Close up of crayon drawing - Note the varying darkness What kind of algorithm would be used to render those lines in a way that looks like a Crayon? Is it a simple texture applied with a random thickness and darkness or is there something more going on?

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• Toggle between "Extend these displays" and "Show desktop only on 1"

  - by Clayton Hughes

  I'm looking for a way to programmatically alter the video properties in Windows 7. I'd like to toggle the Multiple display state (as seen in Control Panel Appearances and Personalization Display Screen Resolution) between "Extend these displays" and "Show desktop only on 1". This is the sort of thing that I think is probably doable just by knowing the right Windows executable/dll to invoke with the right parameters and bundling that into a script or shortcut, but if so that information eludes me. Actual code solutions are fine, of course, but I'd like the change to be permanent and not just disable the other monitor(s) for the duration of the application.

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• Empty "Groups" in People Picker Navigation Controller

  - by Meltemi

  I'm using the standard People Picker Navigation Controller to let users associate one of their contacts with one of my objects. It presents itself as a long list of ALL contacts. The back button (top left) says "Groups" but when clicked on it shows an empty screen...even when there are many Groups in the user's address book. I've read through the docs and can't seem to find how to populate the Groups area. Here's how I present the people picker. Fairly standard: - (IBAction)showPicker:(id)sender { ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init]; picker.peoplePickerDelegate = self; [self presentModalViewController:picker animated:YES]; [picker release]; } What am I missing?

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