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  • Telerik RADGrid - linq and updating

    - by Dave
    Hi Telerik's RADGrid, basing on their example on http://demos.telerik.com/aspnet-ajax/grid/examples/dataediting/programaticlinqupdates/defaultcs.aspx Problem: I can insert and delete, however updating doesn't work. No error trapped. Data just doesn't change. From the code below it looks like Telerik Grid is doing some kung-fu behind the scenes to wire things up. I can't see the db receiving any update statements. Question: anything obvious I'm missing? protected void RadGrid1_UpdateCommand(object source, GridCommandEventArgs e) { var editableItem = ((GridEditableItem) e.Item); var raceId = (Guid) editableItem.GetDataKeyValue("RaceID"); //retrive entity form the Db var race = DbContext.races.Where(n => n.raceid == raceId).FirstOrDefault(); if (race != null) { //update entity's state editableItem.UpdateValues(race); try { //submit chanages to Db DbContext.SubmitChanges(); } catch (Exception f) { ShowErrorMessage(f); } } } Think I may have to go back to their example.. get their db.. and attack from that point of view. Cheers!

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  • WCF "The server did not provide a meaningful reply"

    - by Nelson
    I am out of ideas here, so I'm hoping someone can help. Here is what I've got: A WCF service that only has a basicHttpBinding endpoint. There is only a service interface, all other [DataMember], [FaultContract] are concrete types. When I run it straight from Visual Studio (using WCF Test Client or my custom app) everything works (I send a request and get a response). This usually takes a second or two. I published it to an IIS 6 server. I can successfully open http://server/WebService/WebService.svc?WSDL I can successfully open http://server/WebService/WebService.svc/mex (same output as above) The WCF Test Client and my custom app can successfully add the service reference Whenever I try to call a service method it waits for about 15 seconds and I get the dreaded "no meaningful reply" error. I ran Fiddler and I got a 202 result, which would seem like a success. It's not returning more than 65536 bytes It's returning an array, but it is small I tried remote debugging, but can't get that to work, probably due to a firewall (but port 80 is open, I can get the WSDL) I enabled system.diagnostics, nothing. I have an IErrorHandler which normally logs things, nothing. Here's the endpoint config: <endpoint address="" binding="basicHttpBinding" contract="Enterprise.IMyService" bindingNamespace="http://ourdomain.com/MyService/"> <identity> <dns value="localhost" /> </identity> </endpoint> Anything else I can try? It's probably a simple setting somewhere, but I can't figure it out.

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  • UIScrollView with pages enabled and device rotation/orientation changes (MADNESS)

    - by jbrennan
    I'm having a hard time getting this right. I've got a UIScrollView, with paging enabled. It is managed by a view controller (MainViewController) and each page is managed by a PageViewController, its view added as a subview of the scrollView at the proper offset. Scrolling is left-right, for standard orientation iPhone app. Works well. Basically exactly like the sample provided by Apple and also like the Weather app provided with the iPhone. However, when I try to support other orientations, things don't work very well. I've supported every orientation in both MainViewController and PageViewController with this method: - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return YES; } However, when I rotate the device, my pages become quite skewed, and there are lots of drawing glitches, especially if only some of the pages have been loaded, then I rotate, then scroll more, etc... Very messy. I've told my views to support auto-resizing with theView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; But to no avail. It seems to just stretch and distort my views. In my MainViewController, I added this line in an attempt to resize all my pages' views: - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { self.scrollView.contentSize = CGSizeMake(self.scrollView.frame.size.width * ([self.viewControllers count]), self.scrollView.frame.size.height); for (int i = 0; i < [self.viewControllers count]; i++) { PageViewController *controller = [self.viewControllers objectAtIndex:i]; if ((NSNull *)controller == [NSNull null]) continue; NSLog(@"Changing frame: %d", i); CGRect frame = self.scrollView.frame; frame.origin.x = frame.size.width * i; frame.origin.y = 0; controller.view.frame = frame; } } But it didn't help too much (because I lazily load the views, so not all of them are necessarily loaded when this executes). Is there any way to solve this problem?

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  • Android "single top" launch mode and onNewIntent method

    - by Rich
    I read in the Android documentation that by setting my Activity's launchMode property to singleTop OR by adding the FLAG_ACTIVITY_SINGLE_TOP flag to my Intent, that calling startActivity(intent) would reuse a single Activity instance and give me the Intent in the onNewIntent callback. I did both of these things, and onNewIntent never fires and onCreate fires every time. The docs also say that this.getIntent() returns the intent that was first passed to the Activity when it was first created. In onCreate I'm calling getIntent and I'm getting a new one every time (I'm creating the intent object in another activity and adding an extra to it...this extra should be the same every time if it was returning me the same intent object). All this leads me to believe that my activity is not acting like a "single top", and I don't understand why. To add some background in case I'm simply missing a required step, here's my Activity declaration in the manifest and the code I'm using to launch the activity. The Activity itself doesn't do anything worth mentioning in regards to this: in AndroidManifest.xml: <activity android:name=".ArtistActivity" android:label="Artist" android:launchMode="singleTop"> </activity> in my calling Activity: Intent i = new Intent(); i.putExtra(EXTRA_KEY_ARTIST, id); i.setClass(this, ArtistActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); startActivity(i);

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  • UISearchBar and UINavigationItem

    - by tbehunin
    I can't seem to get a UISearchBar to position itself from the far left to the far right in the navigation bar. In the -(void)viewDidLoad method, I have the following code: `UISearchBar *sb = [[UISearchBar alloc] initWithFrame:self.tableView.tableHeaderView.frame]; sb.delegate = self; self.navigationItem.titleView = sb; [sb sizeToFit]; [sb release];` When you build and run, it looks just fine at first glance. However, looking more closely, you can tell there is a margin/space on the left. This wouldn't be a big deal in the grand scheme of things, but when I tap the search bar to start a search, I animate the cancel button into view. Because the search bar is positioned slightly to the right, the animation is jerky and the cancel button falls off the end like so: link text It seems as if the UINavigationItem is like a table with three cells, where there is a padding on the first and last which I can't remove - nor does there seem to be a way to 'merge' it all together and then place the search bar there. I know this look is possible, because the AppStore search has a search bar in the navigation bar and it goes all the way to the edges. Anyone know how to get the search bar to go all the way to the edges so my slide-in cancel button animation will work properly?

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  • Test run errors with MSTest in VS2010

    - by Tomas Lycken
    When I run my Unit Tests, all tests pass, but instead of "Test run succeeded" or whatever the success message is, I get "Test run error" in the little bar that tells me how many of my tests pass, even though all my tests passed. When i click the text, I'm taken to a page that tells me the following two things happened: Warning: conflict during test run deployment: deployment item '[...]\Booking.Web.dll' directly or indirectly referenced by the test container [...]\Booking.Web.Tests.dll cannot be deployed to 'Booking.Web.dll' because otherwise the file '[...]\Booking.Web.dll' would override deployment item '[...]\Booking.Web.dll' directly or indirectly referenced by '[...]\Booking.Web.Tests.dll' Error: Cannot initialize the ASP.NET project 'Booking.Web' Exception was thrown: The website could not be configured correctly; getting ASP.NET proccess information failed. Requesting 'http://localhost:54131/VSEnterpriseHelper.axd' returned an error: The remote server returned an error: (500) Internal Server Error. I don't understand half of what it's complaining about. How do I get rid of these errors? (And for reference: Booking.Web is an ASP.NET MVC 2 project, Booking.Web.Tests is a Test project, [...] is the full local path to the projects in my environment, in most of the cases above to the /bin/debug/ folder inside the Booking.Web project)

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  • jqGrid Coloring an entire line in Grid based upon a cells value

    - by Thomas
    Hi all, i know it's been asked before but i cant get it to run and i'm out of things to try. So i want to colorize a row in a Grid if its value is not 1 - i use a custom formatter for this. The formatter itself works, thats not the problem. I've tried multple ways I've found so far on the web - adding a class, directly adding css code, using setRowData, using setCell.... Here are my examples - none of them worked for me (linux, ff363) - any pointer would be gratly appreciated. 27.05.2010_00:00:00-27.05.2010_00:00:00 is my row id <style> .state_inactive { background-color: red !important; } .state_active { background-color: green !important; } </style> function format_state (cellvalue, options, rowObject) { var elem='#'+options.gid; if (cellvalue != 1) { jQuery('#list2').setRowData(options.rowID,'', {'background-color':'#FF6F6F'}); jQuery('#list2').setRowData('27.05.2010_00:00:00-27.05.2010_00:00:00', '',{'background-color':'#FF6F6F'}); for (var cnt=0;cnt<rowObject.length;cnt=cnt+1) { jQuery(elem).setCell(options.rowId,cnt,'','state_inactive',''); jQuery(elem).setCell('"'+options.rowId+'"',cnt,'','state_inactive'); jQuery(elem).setCell('"'+options.rowId+'"',cnt,'5', {'background-color':'#FF6F6F'},''); } } else { for (var cnt=0;cnt<rowObject.length;cnt=cnt+1) { jQuery(elem).setCell(options.rowId,cnt,'','state_active',''); } } <!-- dont modify, we simply added the class above--> return cellvalue; } Thanks, Thomas

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  • Vimdiff with git mergetool error: "More than two buffers in diff mode"

    - by Elizabeth Buckwalter
    I've read Vimdiff and Viewing differences with Vimdiff plus doing various google searches using things like "vimdiff multiple", "vimdiff git", "vimdiff commands" etc. When using do or diffg I get the error "More than two buffers in diff mode, don't know which one to use". When using diffg v:fname_in I get "No matching buffer for v:fname_in". From the vimdiff documentation: :[range]diffg[et] [bufspec] Modify the current buffer to undo difference with another buffer. If [bufspec] is given, that buffer is used. If [bufspec] refers to the current buffer then nothing happens. Otherwise this only works if there is one other buffer in diff mode. and more: When 'diffexpr' is not empty, Vim evaluates to obtain a diff file in the format mentioned. These variables are set to the file names used: v:fname_in original file v:fname_new new version of the same file v:fname_out resulting diff file So, I need to get the name of bufspec, but the default variables (fname_in, fname_new, and fname_out) aren't set. I ran the command git mergetool on a linux box through a terminal.

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  • Self hosted WCF ServiceHost/WebServiceHost Concurrency/Peformance Design Options (.NET 3.5)

    - by Kyle
    So I'll be providing a few functions via a self hosted (in a WindowsService) WebServiceHost (not sure how to process HTTP GET/POST with ServiceHost), one of which may be called a large amount of the time. This function will also rely on a connection in the appdomain (hosted by the WindowsService so it can stay alive over multiple requests). I have the following concerns and would be oh so thankful for any input/thoughts/comments: Concurrent access - how does the WebServiceHost handle a bunch of concurrent requests. Are they queued and processes sequentially or are new instances of the contracts automagically created? WebServiceHost - WindowsService communication - I need some form of communication from the WebServiceHost to the hosting WindowsService for things like requesting a new session if one does not exist. Perhaps implementing a class which extends the WebServiceHost with events which the WindowsService subscribes to... (unless there is another way I can set off an event in the WindowsService when a request is made...) Multiple WebServiceHosts or Contracts - Would it give any real performance gain to be running multiple WebServiceHost instances in different threads (one per endpoint perhaps?) - A better understanding of the first point would probably help here. WSDL - I'm not sure why (probably just need to do more reading), but I'm not sure how to get the WebServiceHost base endpoint to respond with a WDSL document describing the available contract. Not required as all the operations will be done via GET requests which will not likely change, but it would be nice to have... That's about it for the moment ;) I've been reading a lot on WCF and wish I'd gotten into it long ago, but definitely still learning.

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  • how to use nokogiri methods .xpath & .at_xpath

    - by Radek
    I'm learning how to use nokogiri and few questions came to me based on the code below require 'rubygems' require 'mechanize' post_agent = WWW::Mechanize.new post_page = post_agent.get('http://www.vbulletin.org/forum/showthread.php?t=230708') puts "\nabsolute path with tbody gives nil" puts post_page.parser.xpath('/html/body/div/div/div/div/div/table/tbody/tr/td/div[2]').xpath('text()').to_s.strip.inspect puts "\n.at_xpath gives an empty string" puts post_page.parser.at_xpath("//div[@id='posts']/div/table/tr/td/div[2]").at_xpath('text()').to_s.strip.inspect puts "\ntwo lines solution with .at_xpath gives an empty string" rows = post_page.parser.xpath("//div[@id='posts']/div/table/tr/td/div[2]") puts rows[0].at_xpath('text()').to_s.strip.inspect puts puts "two lines working code" rows = post_page.parser.xpath("//div[@id='posts']/div/table/tr/td/div[2]") puts rows[0].xpath('text()').to_s.strip puts "\none line working code" puts post_page.parser.xpath("//div[@id='posts']/div/table/tr/td/div[2]")[0].xpath('text()').to_s.strip puts "\nanother one line code" puts post_page.parser.at_xpath("//div[@id='posts']/div/table/tr/td/div[2]").xpath('text()').to_s.strip puts "\none line code with full path" puts post_page.parser.xpath("/html/body/div/div/div/div/div/table/tr/td/div[2]")[0].xpath('text()').to_s.strip is it better to use // or / in xpath? @AnthonyWJones says that 'the use of an unprefixed //' is not so good idea I had to remove tbody from any working xpath otherwise I got 'nil' result. How is possible to remove an element from the xpath to get things work? do I have to use .xpath twice to extract data if not using full xpath? why I cannot make .at_xpath working to extract data? it works nicely here what is the difference?

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  • Reset scale/width/zoom of Safari on iPhone using JavaScript/onorientationchange

    - by dwarbi
    I am displaying different content depending on how the user is holding his/her phone using the onorientationchange call in the body tag. This works great - I hide one div while making the other visible. The div in portrait mode looks great on first load. I use this to get the right scale/zoom: <meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0;" /> Even if the content in portrait mode run over, the width is correct and the user can scroll down. The display in landscape mode is perfect too. However, if content in landscape mode requires the user the scroll down, then when the user returns to portrait mode, the screen is "zoomed out" so to speak. This happens whether or not the user scrolled down while in landscape mode. I've tried many different things to try to get the scale/zoom/width of the screen right, but no luck. Is there any way to do this? Thanks in advance!

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  • WPF Databound RadioButton ListBox

    - by Mark
    I am having problems getting a databound radiobutton listbox in WPF to respond to user input and reflect changes to the data it's bound to (i.e., to making changes in the code). The user input side works fine (i.e., I can select a radiobutton and the list behaves as expected). But every attempt to change the selection in code fails. Silently (i.e., no exception). Here's the relevant section of the XAML (I think): <Setter Property="ItemContainerStyle"> <Setter.Value> <Style TargetType="{x:Type ListBoxItem}" > <Setter Property="Margin" Value="2" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type ListBoxItem}"> <Border Name="theBorder" Background="Transparent"> <RadioButton Focusable="False" IsHitTestVisible="False" IsChecked="{Binding Path=IsSelected, RelativeSource={RelativeSource TemplatedParent}, Mode=TwoWay}" > <ContentPresenter /> </RadioButton> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </Setter.Value> I bind the listbox to a List of SchoolInfo objects. SchoolInfo contains a property called IsSelected: public bool IsSelected { get { return isSelected; } set { if( value != isSelected ) { isSelected = value; this.OnPropertyChanged("IsSelected"); } } } The OnPropertyChanged() stuff was something I put in during my experimentation. It doesn't solve the problem. Things like the following fail: ((SchoolInfo) lbxSchool.Items[1]).IsSelected = true; lbxSchool.SelectedIndex = 1; They fail silently -- no exception is thrown, but the UI doesn't show the item being selected. Mark

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  • Visual C# GUI Designer - Recommended way of removing generated event handler-code & basic tutorial

    - by cusack
    Hi, I'm new to the Visual C# designer so these are general and pretty basic question on how to work with the designer. When we for instance add a label to a form and then double-click on it in the Visual C# designer (I'm using Microsoft Visual C# 2008 Express Edition), the following things happen: The designer generates code within Form1.Designer.cs (assume default names for simplicity) to add the label, then with the double-click it will add the event handler label1_Click to the label within Form1.Designer.cs, using the following code this.label1.Click += new System.EventHandler(this.label1_Click); and it adds the event handler method to Form1.cs private void label1_Click(object sender, EventArgs e) { } If I now remove the label only the code within Form1.Designer.cs will be removed but the label1_Click method will stay within Form1.cs even if it isn't used by anything else. But if I'm using reset within Properties-Events for the Click-event from within the designer even the label1_Click method in Form1.cs will be removed. 1.) Isn't that a little inconsistent behavior? 2.) What is the recommended way of removing such generated event handler-code? 3.) What is the best "mental approach"/best practice for using the designer? I would approach it by mental separation in the way that Form1.cs is 100% my responsibility and that on the other hand I'm not touching the code in Form1.Designer.cs at all. Does that make sense or not? Since sometimes the designer removes sth. from Form1.cs I'm not sure about this. 4.) Can you recommend a simple designer tutorial that assumes no Visual C# designer knowledge but expects/doesn't explain C#. The following one is an example of what I would not want it explains what a c#-comment is and I'd prefer text over video as well: http://msdn.microsoft.com/en-us/beginner/bb964631.aspx

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  • Drag String data from My Cocoa App to Third-Party Cocoa App

    - by Woodster
    Hello, I want to drag a row from my tableview and drop it into any other NSTextField in Mac OS X 10.6, and have a string of text be dropped. Drag and drop already works within my app (between a NSTableView and an NSBrowser), but I have had no success putting any data on the pasteboard that can accepted by apps other than the source application. Here's the code I tried, which I thought would be enough to get hte word "hello" to be 'pasted' when I drop into some other NSTextField: -(BOOL) tableView:(NSTableView *)tableView writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard *)pboard { [pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:self]; [pboard setString:@"hello" forType:NSStringPboardType]; return YES; } //-- I never get the cursor that shows me the drop will be accepted, and it just doesn't work. Things I've tried: Using the 10.5 version of the Pasteboard identifier, NSStringPBoardType Using the 10.6 version, NSPasteboardTypeString. Setting the owner = nil, since I'm not providing the data lazily. Using the keyed archiver: [pboard setData:[NSKeyedArchiver archivedRootObject:@"Hello!!"]] None of the above have worked. I think I have the concepts correct: "Encode data, tell the pasteboard what you've got, then give it the data", but since other apps don't recognize it, I suspect I'm not telling the pasteboard the correct datatype. Where am I going wrong? Thanks, Woody

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  • Combobox with collection view itemssource does not update selection box item on changes to the Model

    - by Vinit Sankhe
    Hello, Sorry for the earlier lengthy post. Here is my concise (!) description. I bind a collection view to a combobox as a itemsSource and also bind its selectedvalue with a property from my view model. I must keep IsSynchronizedWithCurrentItem="False". I change the source list ofr the view and then refresh the view. The changed (added, removed, edited) items appear correctly in the item list of the combo. But problem is with the selected item. When I change its property which is also the displaymember path of the combo, the changed property value does not reflect back on the selecton box of the combo. If you open the combo dropdown it appears correctly on the item list but not on the selection box. Now if I change the combobox tag to Listbox in my XAML (keeping all attributes as it is) then when selected item's displaymember property value is updated, the changes reflect back on the selected item of the list box . Why this issue? Just FYI: My View Model has properties EmployeeCollectionView and SelectedEmployeeId which are bound to combo as ItemsSource and SelectedValue resp. This VM implements the INotifyPropertyChanged interface. My core employee class (list of which is the source for the EmployeeCollectionView) is simply a Model class without INotifyPropertyChanged. DisplayMemberPath is "Name" property of employee Model class. I change this by some means and expect the combo selection box to update the value. I tried refreshing ther SelectedEmployeeId by setting it 0 (where it correctly selects the dummy "-- Select All --" employee entry from itemsSource) and old selected value back. But no use. The old value takes me back to the old label. Items collection has latest entry though. When I make combobox's IsEditable=True before the view's refresh and after refresh I make IsEditable=False then the things work out correctly! But this is a patch and is unnecessary. Thx Vinit Sankhe

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  • Notification Email Best Practices--From Server Setup to Programming

    - by Andrew Wagner
    All, I'm in the process now of building a SaaS tool that allows network admins to generate notification emails to the members of the end-users of our platform (among many many other things). I'm running into a bit of an "out of my expertise" wall, as I know there are a lot of variables involved with configuring an application that can: Run in a distributed way via load balancing and still-- Leverage a single mail server for sending notification emails Process unsubscribe requests Avoid any ISP blacklisting in the process. If anyone has the time and has done this before, I'd love if you could walk me through the A-Z of best practices both from a configuration perspective and an execution perspective for generating these emails (anything from necessary DNS settings to ideal SMTP setup and configuration) Currently, our application generates email via Google Apps using the PHPMailer class. While this works well, it doesn't queue messages (potential for timeout problems if any of our clients amass a very large list of end-users), and Google limits the amount of allowed generated email messages to 500/day. I know this is a lofty question, but any guidance you could provide would be smashing and a big help as we work through this hurtle in our beta development stage. Thanks!

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  • Delicious API and Yahoo oAuth in .NET

    - by Khash
    The fact that Delicious has two sets of API authentications one with username and password and one with oAuth told me something about things I was going to experience and I wasn't wrong. Unfortunately I have to deal with both APIs now and am unsuccessful getting through the first hurdle of API v2 (Yahoo oAuth). Here is a code snippet (I'm using OpenSocial in this example http://code.google.com/p/opensocial-net-client) public static string GetRequestToken(string callbackUrl) { string normaluri; string normaluriparam; OAuthBase oAuth = new OAuthBase(); string nonce = oAuth.GenerateNonce(); string timeStamp = oAuth.GenerateTimeStamp(); string sig = oAuth.GenerateSignature(new Uri(TOKEN_URL), ConfigurationManager.AppSettings[CONSUMER_KEY], ConfigurationManager.AppSettings[SECRET_KEY], string.Empty, string.Empty, "GET", timeStamp, nonce, OAuthBase.SignatureTypes.HMACSHA1, out normaluri, out normaluriparam); sig = HttpUtility.UrlEncode(sig); string result = HttpClient.Get(TOKEN_URL, new { oauth_nonce = nonce, oauth_timestamp = timeStamp, oauth_consumer_key = ConfigurationManager.AppSettings[CONSUMER_KEY], oauth_signature_method = "HMAC-SHA1", oauth_signature = sig, oauth_version = "1.0", oauth_callback = callbackUrl }); return result; } It seems it doesn't matter if I follow instructions at http://delicious.com/help/oauthapi myself of leave it to OpenSocial, I get an "401 Unauthorized" from the server with no further info. I can see many people have the same issue but couldn't find any resolution.

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  • Faster way to transfer table data from linked server

    - by spender
    After much fiddling, I've managed to install the right ODBC driver and have successfully created a linked server on SQL Server 2008, by which I can access my PostgreSQL db from SQL server. I'm copying all of the data from some of the tables in the PgSQL DB into SQL Server using merge statements that take the following form: with mbRemote as ( select * from openquery(someLinkedDb,'select * from someTable') ) merge into someTable mbLocal using mbRemote on mbLocal.id=mbRemote.id when matched /*edit*/ /*clause below really speeds things up when many rows are unchanged*/ /*can you think of anything else?*/ and not (mbLocal.field1=mbRemote.field1 and mbLocal.field2=mbRemote.field2 and mbLocal.field3=mbRemote.field3 and mbLocal.field4=mbRemote.field4) /*end edit*/ then update set mbLocal.field1=mbRemote.field1, mbLocal.field2=mbRemote.field2, mbLocal.field3=mbRemote.field3, mbLocal.field4=mbRemote.field4 when not matched then insert ( id, field1, field2, field3, field4 ) values ( mbRemote.id, mbRemote.field1, mbRemote.field2, mbRemote.field3, mbRemote.field4 ) WHEN NOT MATCHED BY SOURCE then delete; After this statement completes, the local (SQL Server) copy is fully in sync with the remote (PgSQL server). A few questions about this approach: is it sane? it strikes me that an update will be run over all fields in local rows that haven't necessarily changed. The only prerequisite is that the local and remote id field match. Is there a more fine grained approach/a way of constraining the merge statment to only update rows that have actually changed?

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  • Why to build own CMS?

    - by ile
    On my first job interview, I was asked why did I build my own CMS? Why not to use one of existing CMS, Wordpress, Joomla, Drupal...? At first, I was stunned. I couldn't immediately recall all of my reasons for building my own CMS, but this was definitely one of the main reasons: It's my code and if I want to change something in that CMS (which I often have to do, because each website I build needs CMS with different functions) it's not a big problem. For some time I've been using Wordpress and one of the main things that distracted me from using it was discovering bugs in code that wasn't written by me and this bugs were often, especially if I made some changes to CMS or added a plugin... Here, I can find these 8 reasons why NOT to build own CMS: It won’t meet users’ needs It’s too much work It won’t be a standard solution It won’t be extendible fast enough It won’t be tested well enough It won’t be easily changeable It won’t add any value Create content, not functionality Quote from the same page: So the main question to ask yourself is: ‘Why am I really trying to re-solve a problem that has already been solved before?’ Well, I definitely agree that it's hard to invent CMS that hasn't been already invented, but on other hand, I think every CMS is (or should be) individual... it maybe won't have a million of functions, it will have 3 functions but their usage will be clear (to a user) and do all that one site needs to have. I think also that it is not good to give to a client a CMS with a lot of functions that are never used and it looks probably more professional when website and CMS together look like one product. I would also like to comment some quote parts: "It’s too much work" - I agree, but when using existing CMS and customizing it to website needs and can sometimes be very hard job or mission impossible. "It won’t be easily changeable" - I disagree with this one. What is your opinion on this one, why did you develop or didn't develop your own CMS? Ile

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  • Thread-safe data structures

    - by Inso Reiges
    Hello, I have to design a data structure that is to be used in a multi-threaded environment. The basic API is simple: insert element, remove element, retrieve element, check that element exists. The structure's implementation uses implicit locking to guarantee the atomicity of a single API call. After i implemented this it became apparent, that what i really need is atomicity across several API calls. For example if a caller needs to check the existence of an element before trying to insert it he can't do that atomically even if each single API call is atomic: if(!data_structure.exists(element)) { data_structure.insert(element); } The example is somewhat awkward, but the basic point is that we can't trust the result of exists call anymore after we return from atomic context (the generated assembly clearly shows a minor chance of context switch between the two calls). What i currently have in mind to solve this is exposing the lock through the data structure's public API. This way clients will have to explicitly lock things, but at least they won't have to create their own locks. Is there a better commonly-known solution to these kinds of problems? And as long as we're at it, can you advise some good literature on thread-safe design? Thank you.

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  • Why is jQuery so widely adopted versus other Javascript frameworks?

    - by Andrew Moore
    I manage a group of programmers. I do value my employees opinion but lately we've been divided as to which framework to use on web projects. I personally favor MooTools, but some of my team seems to want to migrate to jQuery because it is more widely adopted. That by itself is not enough for me to allow a migration. I have used both jQuery and MooTools. This particular essay tends to reflect how I feel about both frameworks. jQuery is great for DOM Manipulation, but seem to be limited to helping you do that. Feature wise, both jQuery and MooTools allow for easy DOM Selection and Manipulation: // jQuery $('#someContainer div[class~=dialog]') .css('border', '2px solid red') .addClass('critical'); // MooTools $('#someContainer div[class~=dialog]') .setStyle('border', '2px solid red') .addClass('critical'); Both jQuery and MooTools allow for easy AJAX: // jQuery $('#someContainer div[class~=dialog]') .load('/DialogContent.html'); // MooTools (Using shorthand notation, you can also use Request.HTML) $('#someContainer div[class~=dialog]') .load('/DialogContent.html'); Both jQuery and MooTools allow for easy DOM Animation: // jQuery $('#someContainer div[class~=dialog]') .animate({opacity: 1}, 500); // MooTools (Using shorthand notation, you can also use Fx.Tween). $('#someContainer div[class~=dialog]') .set('tween', {duration: 500}) .tween('opacity', 1); jQuery offers the following extras: Large community of supporters Plugin Repository Integration with Microsoft's ASP.NET and VisualStudio Used by Microsoft, Google and others MooTools offers the following extras: Object Oriented Framework with Classic OOP emulation for JS Extended native objects Higher consistency between browsers for native functions support. More easy code reuse Used by The World Wide Web Consortium, Palm and others. Given that, it seems that MooTools does everything jQuery does and more (some things I cannot do in jQuery and I can in MooTools) but jQuery has a smaller learning curve. So the question is, why did you or your team choose jQuery over another JavaScript framework? Note: While I know and admit jQuery is a great framework, there are other options around and I'm trying to take a decision as to why jQuery should be our choice versus what we use right now (MooTools)?

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  • Error Handling in T-SQL Scalar Function

    - by hydroparadise
    Ok.. this question could easily take multiple paths, so I will hit the more specific path first. While working with SQL Server 2005, I'm trying to create a scalar funtion that acts as a 'TryCast' from varchar to int. Where I encounter a problem is when I add a TRY block in the function; CREATE FUNCTION u_TryCastInt ( @Value as VARCHAR(MAX) ) RETURNS Int AS BEGIN DECLARE @Output AS Int BEGIN TRY SET @Output = CONVERT(Int, @Value) END TRY BEGIN CATCH SET @Output = 0 END CATCH RETURN @Output END Turns out theres all sorts of things wrong with this statement including "Invalid use of side-effecting or time-dependent operator in 'BEGIN TRY' within a function" and "Invalid use of side-effecting or time-dependent operator in 'END TRY' within a function". I can't seem to find any examples of using try statements within a scalar function, which got me thinking, is error handling in a function is possible? The goal here is to make a robust version of the Convert or Cast functions to allow a SELECT statement carry through depsite conversion errors. For example, take the following; CREATE TABLE tblTest ( f1 VARCHAR(50) ) GO INSERT INTO tblTest(f1) VALUES('1') INSERT INTO tblTest(f1) VALUES('2') INSERT INTO tblTest(f1) VALUES('3') INSERT INTO tblTest(f1) VALUES('f') INSERT INTO tblTest(f1) VALUES('5') INSERT INTO tblTest(f1) VALUES('1.1') SELECT CONVERT(int,f1) AS f1_num FROM tblTest DROP TABLE tblTest It never reaches point of dropping the table because the execution gets hung on trying to convert 'f' to an integer. I want to be able to do something like this; SELECT u_TryCastInt(f1) AS f1_num FROM tblTest fi_num __________ 1 2 3 0 5 0 Any thoughts on this? Is there anything that exists that handles this? Also, I would like to try and expand the conversation to support SQL Server 2000 since Try blocks are not an option in that scenario. Thanks in advance.

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  • ANTLR AST rules fail with RewriteEmptyStreamException

    - by Barry Brown
    I have a simple grammar: grammar sample; options { output = AST; } assignment : IDENT ':=' expr ';' ; expr : factor ('*' factor)* ; factor : primary ('+' primary)* ; primary : NUM | '(' expr ')' ; IDENT : ('a'..'z')+ ; NUM : ('0'..'9')+ ; WS : (' '|'\n'|'\t'|'\r')+ {$channel=HIDDEN;} ; Now I want to add some rewrite rules to generate an AST. From what I've read online and in the Language Patterns book, I should be able to modify the grammar like this: assignment : IDENT ':=' expr ';' -> ^(':=' IDENT expr) ; expr : factor ('*' factor)* -> ^('*' factor+) ; factor : primary ('+' primary)* -> ^('+' primary+) ; primary : NUM | '(' expr ')' -> ^(expr) ; But it does not work. Although it compiles fine, when I run the parser I get a RewriteEmptyStreamException error. Here's where things get weird. If I define the pseudo tokens ADD and MULT and use them instead of the tree node literals, it works without error. tokens { ADD; MULT; } expr : factor ('*' factor)* -> ^(MULT factor+) ; factor : primary ('+' primary)* -> ^(ADD primary+) ; Alternatively, if I use the node suffix notation, it also appears to work fine: expr : factor ('*'^ factor)* ; factor : primary ('+'^ primary)* ; Is this discrepancy in behavior a bug?

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  • Show/Hide RichFaces component onclick client-side? (without AJAX)

    - by Dolph Mathews
    I'm looking for a way to show/hide an arbitrary RichFaces component. In this case, I have a <rich:dataTable> that contains several rows. Each row needs to have it's own, independent Show/Hide link, such that when you click "Show details", two things happen: The "Show details" link is re-rendered as "Hide details" The associated detailsColumn is displayed. Furthermore, detailsColumns should be hidden by default (effectively rendered="true" to the client but hidden with style="display: none;"). I don't want to write my own JavaScript functions if it's not absolutely necessary. I also don't want to have a server-side bean keep track of which detailColumns are being displayed, and subsequently re-render everything over AJAX: this should be purely client-side behavior. I'm not sure how to accomplish that. The following pseudo-code (hopefully) illustrates my goal: <rich:column> <a href="#" onclick="#{thisRow.detailsColumn}.show();" rendered="">Show details</a> <a href="#" onclick="#{thisRow.detailsColumn}.hide();" rendered="">Hide details</a> </rich:column> <rich:column> <h:outputText value="#{thisRow.someData}" /> </rich:column> <rich:column id="detailsColumn" colspan="2" breakBefore="true"> <h:outputText value="#{thisRow.someMoreData}" /> </rich:column>

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  • Silverlight 2 Error Code: 4004

    - by jkidv
    Hey guys/gals. I have a silverlight 2 app that has an ObservableCollection of a class from a separate assem/lib. When I set my ListBox.ItemsSource on that collection, and run it, I get the error code: 4004 "System.ArgumentException: Value does not fall within the expected range." Here is part of the code: public partial class Page : UserControl { ObservableCollection<Some.Lib.Owner> ooc; public Page() { ooc = new ObservableCollection<Some.Lib.Owner>(); Some.Lib.Owner o1 = new Some.Lib.Owner() { FirstName = "test1" }; Some.Lib.Owner o2 = new Some.Lib.Owner() { FirstName = "test2" }; Some.Lib.Owner o3 = new Some.Lib.Owner() { FirstName = "test3" }; ooc.Add(o1); ooc.Add(o2); ooc.Add(o3); InitializeComponent(); lb1.ItemsSource = ooc; } } But when I create the Owner class within this same project, everything works fine. Is there some security things going on behind the scenes? Also, I'm using the generate a html page option and not the aspx option, when I created this Silverlight 2 app.

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