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• How to tell if any entities in context are dirty with .Net Entity Framework 4.0

  - by Mike Gates

  I want to be able to tell if there is any unsaved data in an entity framework context. I have figured out how to use the ObjectStateManager to check the states of existing entities, but there are two issues I have with this. I would prefer a single function to call to see if any entities are unsaved instead of looping though all entities in the context. I can't figure out how to detect entities I have added. This suggests to me that I do not fully understand how the entity context works. For example, if I have the ObjectSet myContext.Employees, and I add a new employee to this set (with .AddObject), I do not see the new entity when I look at the ObjectSet and I also don't see the .Count increase. However, when I do a context.SaveChanges(), my new entity is persisted...huh? I have been unable to find an answer to this in my msdn searches, so I was hoping someone here would be able to clue me in. Thanks in advance.

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• WPF ListView.CurrentChanged too fast for binding

  - by matt

  My case: MVVM ListView+Details(custom UserControl) List bound to MV.Items (IsSynchronizedWithCurrent=true) Details bound to MV.Items.Current MV.Items.Count == 100 about 0.2sec to read details (lazy mode) When I hold the down arrow on the list, very strange things happen: list items order change current changes in the random order CPU usage drastically increments and eventually all hangs. I've read some post that one should start the timer or run handler in the background, but I am not able to do that, since all the binding WPF does for me. Is there some way to instruct the binding in my DetailsControl, to wait a while before accepting CurrentItem? Or should I just resign from the clean solution and write custom code in my MV to handle that?

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• how to copy attribute XML node to specified structure or array

  - by jozi

  how to copy attribute XML node to specified structure or array with one command for example public struct PossibilityJavamed { public string derv; public string dervt; public string num; public string gend; } PossibilityJavamed tmpstructnew = tmpstruct; ArrayList alstout = new ArrayList(); XmlNodeList nodeList; nodeList = docHarf.SelectNodes("//adatesmi"); for (int i = 0; i < nodeList.Count; i++) { tmpstructnew.derv = nodeList[i].Attributes["derv"].Value; tmpstructnew.dervt = nodeList[i].Attributes["dervt"].Value; tmpstructnew.num = nodeList[i].Attributes["num"].Value; tmpstructnew.gend = nodeList[i].Attributes["gend"].Value; alstout.Add(tmpstructnew); } but i will do it in one command

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• DBnull in Linq query causing problems

  - by nat

  hi there i am doing a query thus: int numberInInterval = (from dsStatistics.J2RespondentRow item in jStats.J2Respondent where item.EndTime > dtIntervalLower && item.EndTime <= dtIntervalUpper select item).count(); there appear to be some dbnulls in the endtime column.. any way i can avoid these? tried adding && where item.endtime != null.. and even != dbnull.value do i have to do a second (first) query to grab all that arent null then run the above one? im sure its super simple fix, but im still missing it.. as per thanks nat

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• How to delete VB code from an Excel sheet using C#?

  - by Bashir Magomedov

  Does anyone know how to delete all VB code form an Excel workbook using C#? This code doesn’t work. It removes first (last one) VBComponent, but rises ArgumentException on second one. VBProject project = workbook.VBProject; int componentsCount = project.VBComponents.Count; for (int i = componentsCount; i >= 1; i--) { VBComponent component = project.VBComponents.Item(i); project.VBComponents.Remove(component); } Any suggestions? :)

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• problem in adding data to an array in Objective-C!!!

  - by anurag

  I am grappling with adding an NSData object to a NSMutable array. The code is executing fine but it is not adding the objects in the array.The code is as follows: NSData * imageData = UIImageJPEGRepresentation(img, 1.0); int i=0; do{ if([[tempArray objectAtIndex:i] isEqual:imageData]) { [tempArray removeObjectAtIndex:i]; } else { [tempArray addObject:imageData]; //NSLog(@"ANURAG %@",[tempArray objectAtIndex:0]); } }while(i<[tempArray count]) ; The NSLog statement shows the object added is null however the value of imageData is not null. I have defined the tempArray as a static memeber of the class in which this code is written. Is it because of the size of the data object as it is the data of an image????

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• Can a grails controller extend from a base class? How to make it so grails doesn't blow up?

  - by egervari

  I wrote a base class to help build my controllers more quickly and to remove duplication. It provides some helper methods, default actions and some meta programming to make these things easier to build. One of those methods in the base class is like this: def dynamicList(Class clazz) { def model = new LinkedHashMap() model[getMapString(clazz) + "s"] = list(clazz) model[getMapString(clazz) + "sTotal"] = count(clazz) model } The action that calls it, also in the base class, is this: def list = { dynamicList(clazz) } Unfortunately, when I go to list action in the controller subclass that inherits the base class when my application is deployed, I get this exception: groovy.lang.MissingMethodException: No signature of method: groovy.lang.MissingMethodException.dynamicList() is applicable for argument types: (java.lang.Class) values: [class project .user.User] at project.user.UserController$_closure1.doCall(UserController.groovy:18) at project.user.UserController$_closure1.doCall(UserController.groovy) at java.lang.Thread.run(Thread.java:619) How can I hit grails over the head and just tell it do what I want it to do? My controller unit tests run just fine, so grails' run-time is totally at fault :/ Ken

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• Spring.NET. How actively is it being developed/supported?

  - by Bubba88

  I've made my choice for the developement components on the .NET platform: Spring.NET for IoC and NHibernate for data access. But how safe is it? I've heard here on SO (don't remember which post exactly) that Spring.NET is on its way down, cause for example the Java original version is developed by a large number of people; but (they say that) the sole person behind the .NET version is Mr. Mark Pollack. Is that so? And, if so, does it still make sense to count on Spring.NET for my production applications? if you have similar information about NHibernate, I'll appreciate it; though it seems that the latter is actively supported.

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• How to reuse a dropdownlist each row of a table instead of rebuilding it.

  - by Praesagus

  I have a table the uses the same dropdown list in each row. I thought that I could just create one dropdown list and then reuse it in each new row, but the table only ends up with one row unless I create "new" dropdownlist. Am I approaching this all wrong? Thanks private void UserRoles() { Table table = MakeTable(); Ewo.sqlDataStore.Administrator sql = new Ewo.sqlDataStore.Administrator(); DataSet dataset =sql.SiteUserRoleList(); DropDownList sel = RoleList(dataset.Tables[0]); if(tools.validDataSet(dataset)) { if (dataset.Tables.Count > 1)//existing roles are #2, show the roles the user is part of { foreach (DataRow dRow in dataset.Tables[1].Rows) { table.Rows.Add(CreateRoleRow(Convert.ToString(dRow["SitePageGroupName"]), sel));//add a row with data } } table.Rows.Add(CreateRoleRow(sel));//add a blank row on the bottom } AdminSiteUerRoles.Controls.Add(table);//add it all to the page }

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• SQL Server 2005 RIGHT OUTER JOIN not working

  - by CheeseConQueso

  I'm looking up access logs for specific courses. I need to show all the courses even if they don't exist in the logs table. Hence the outer join.... but after trying (presumably) all of the variations of LEFT OUTER, RIGHT OUTER, INNER and placement of the tables within the SQL code, I couldn't get my result. Here's what I am running: SELECT (a.first_name+' '+a.last_name) instructor, c.course_id, COUNT(l.access_date) course_logins, a.logins system_logins, MAX(l.access_date) last_course_login, a.last_login last_system_login FROM lsn_logs l RIGHT OUTER JOIN courses c ON l.course_id = c.course_id, accounts a WHERE l.object_id = 'LOGIN' AND c.course_type = 'COURSE' AND c.course_id NOT LIKE '%TEST%' AND a.account_rights > 2 AND l.user_id = a.username AND ((a.first_name+' '+a.last_name) = c.instructor) GROUP BY c.course_id, a.first_name, a.last_name, a.last_login, a.logins, c.instructor ORDER BY a.last_name, a.first_name, c.course_id, course_logins DESC Is it something in the WHERE clause that's preventing me from getting course_id's that don't exist in lsn_logs? Is it the way I'm joining the tables? Again, in short, I want all course_id's regardless of their existence in lsn_logs.

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• cant get my listbox to display objects

  - by Silvia Stoyanova

  Hello everyone I've been trying to put some objects in an ASP.NET list box but its just not working. I do have an overriden ToString method so I cant understand why this statement wont work. Here's the code that I use: for (int i = 0; i < fitnessClassList.Count(); i++) { lbDisplayItems.Items.Add(fitnessClassList.getFitnessClass(i)); } And the errors that I get: Error 2 Argument 1: cannot convert from 'FitnessClassManager.FitnessClassOpportunity' to 'System.Web.UI.WebControls.ListItem' Error 1 The best overloaded method match for 'System.Web.UI.WebControls.ListItemCollection.Add(System.Web.UI.WebControls.ListItem)' has some invalid arguments

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• problem when I save the text of an htmlEditor ?

  - by ahmed

  Hello guys , I have a problem when I save the content of a htmlEditor it takes the first line of the message. For example I enter text text text text text text After entering the text when i retrieve it I just get the first line of the message . Send message code HtmlEdit1.Lines.Add(" <br />") HtmlEdit1.Lines.Add(" <br />") html_txt = "" For I = 0 To HtmlEdit1.Lines.Count - 1 html_txt = html_txt + HtmlEdit1.Lines(I).ToString() Next mydt = DateTime.Now Then inserting the record in SQL insert into MESSAGES (SRNO, ID, subject)values ( @P1, @P2, @P3) Finally updating the grid.

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• What CPAN module can summarize error logs?

  - by mithaldu

  I'm maintaining some website code that will soon dump all its errors and warnings into a log file. In order to make this a bit more pro-active i plan to parse this log file daily, summarize the warnings and errors (i.e. count the occurrence of each specific one and group by either warning/error) and then email this to the devs on the project. This would likely admittedly be rather trivial with a hash and some further fiddling, I wondered if there is a suitable module on CPAN that i could use to do this task. It would either be one that summarizes specifically perl error/warnings logs or one that summarizes arbitrary text files. Any suggestions?

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• Twitter client with JQuery not working in Firefox

  - by lpdahito

  Hey guys, I've got a little script that fetches my latest tweets... I use JQuery's getJSON method to fetch my tweets. The script works well with Chrome and Safari but when it comes to Firefox, nothing appears! here's the code: $.getJSON('http://api.twitter.com/1/statuses/user_timeline.json?screen_name=lpdahito&count=3&callback=?', function(data) { $('#tweets').html('<p>' + data[0].text + '</p><p>' + data[1].text + '</p><p>' + data[2].text + '</p>'); }); Thanks for helping! LP

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• set Image to Button

  - by Ivan

  Hello all, Could somebody help me a little bit with my issue below? When I call the myFunction, images which I want to set to buttons appear after 2 sec simultaneously, not one by one with delay of 0.5 sec. More info: generatedNumbers is array with four elements of NSNumber (4,1,3,2) buttons are set in UIView via IB and are tagged (1,2,3,4) -(IBAction) myFunction:(id) sender { int i, value; for (i = 0; i<[generatedNumbers count]; i++) { value = [[generatedNumbers objectAtIndex:i] intValue]; UIButton *button = (UIButton *)[self.view viewWithTag:i+1]; UIImage *img = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",value]]; [button setImage:img forState:UIControlStateNormal]; [img release]; usleep(500000); } }

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• PHP Dynamic Breadcrumb, small modification

  - by Adrian M.

  Hello, I got this code from someone and it works very well, I just want to remove the link from the last element of the array: //get rid of empty parts $crumbs = array_filter($crumbs); $result = array(); $path = ''; foreach($crumbs as $crumb){ $path .= '/' . $crumb; $name = ucfirst(str_replace(array(".php","_"),array(""," "), $crumb)); $result[] = "<a href=\"$path\">$name</a>"; } print implode(' > ', $result); This will output for example: Content Common File I just want a to remove the link from the last item - "File" to be just plain text.. I tried myself to count the array items and then if the array item is the last one then to print as plain text the last item.. but I'm still noob, I haven't managed to get a proper result.. Thank you!

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• Play sound in mobile browser?

  - by John

  I want to make myself a web based stop watch for training that I can use on my Blackberry mobile browser. The stopwatch should count 3 minutes, then ring a bell, wait 1 minute, then ring another bell and then repeat. My problem is I can't seem to get sound to work on my blackberry browser. I tried using <embed src="bell.wav"> which works fine in the browser of a normal computer, but it doesn't make a sound on my blackberry. Should I build this stopwatch with Javascript and HTML or should I build it with flash?

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• What should I call the operation that limit a string's length?

  - by egarcia

  This is a language-agnostic question - unless you count English as a language. I've got this list of items which can have very long names. For aesthetic purposes, these names must be made shorter in some cases, adding dots (...) to indicate that the name is longer. So for example, if article.name returns this: lorem ipsum dolor sit amet I'd like to get this other output. lorem ipsum dolor ... I can program this quite easily. My question is: how should I call that shortening operation? I mean the name, not the implementation. Is there a standard English name for it?

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• Is it a good idea to create an STL iterator which is noncopyable?

  - by BillyONeal

  Most of the time, STL iterators are CopyConstructable, because several STL algorithms require this to improve performance, such as std::sort. However, I've been working on a pet project to wrap the FindXFile API (previously asked about), but the problem is it's impossible to implement a copyable iterator around this API. A find handle cannot be duplicated by any means -- DuplicateHandle specifically forbids passing handles to it. And if you just maintain a reference count to the find handle, then a single increment by any copy results in an increment of all copies -- clearly that is not what a copy constructed iterator is supposed to do. Since I can't satisfy the traditional copy constructible requirement for iterators here, is it even worth trying to create an "STL style" iterator? On one hand, creating some other enumeration method is going to not fall into normal STL conventions, but on the other, following STL conventions are going to confuse users of this iterator if they try to CopyConstruct it later. Which is the lesser of two evils?

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• DataTable C# Empty column type

  - by Dested

  I am trying build a DataTable one row at a time using the following code. foreach (var e in Project.ProjectElements[hi.FakeName].Root.Elements()) { index = 0; object[] obj=new object[count]; foreach (var holdingColumn in names) { string d = e.Attribute(holdingColumn.Key).Value; obj[index++] = d; } dt.Rows.Add(obj); } The problem is the DataTable has types tied to the columns. Sometimes im passing null (or an empty string) in that object index and it is telling me that it cant be converted properly to a DateTime (in this case). My question is what should I default this value to, or is there some way to have the DataTable ignore empty values.

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• jqGrid local date manipulation; problem with row ids when deleting and adding new rows

  - by Sam

  I'm using jqGrid as a client side grid input, allowing the user to input multiple records before POSTing all the data back at once. I'm having a problem where if the user has added a few records (say 3 ) the id's for the records will be 1,2,3. if the user deletes record 2, you're left with 1 and 3 for the id of the records. When the user now adds a new records, jqGrid assigns that records the id 3 again since it just seems to count the total records and increments it by one for the new record. This causes problems when selecting rows as now the row id's are 1, 3 and 3. Does anyone know how to access the row ids of records as I could probably use the afterSubmit event and reassign the row id's increasing from 1. ( so after i delete row id 2, this will set the other row id's to 1 and 2) Any other suggestions to solve this problem? Thanks

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• Grouping rectangles (getting the bounding boxes of rects)

  - by hyn

  What is a good, fast way to get the "final" bounding boxes of a set of random (up to about 40, not many) rectangles? By final I mean that all bounding boxes don't intersect with any other. Brute force way: in a double for loop, for each rect, test for intersection against every other rect. The intersecting rects become a new rect (replaced), indicating the bounding box. Start over and repeat until no intersection is detected. Because the rects are random every time, and the rect count is relatively small, collision detection using spatial hashing seems like overkill. Is there a way to do this more effectively?

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• Flex: Can I assign propertiy of multi-layer object to Chart's xField or yField?

  - by Sean Chen

  Hi, I have a question about how to assign property of a multi-layer object to Chart's xField or yField. For example: var obj:Object = new Object(); var store:Object = new Object(); store.store1 = 300; store.store2 = 200; store.store3 = 250; obj.date = "2010/04/26"; obj.count = 2; obj.store = store; Because I have to draw multiple LineSeries, the yField on different series must be assigned to obj.store.store1~store3. How can I set yField in different layer of object?

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• Linq To Sql: Compiled Queries and Extension Methods

  - by Beni

  Hi community, I'm interessted, how does Linq2Sql handles a compiled query, that returns IQueryable. If I call an extension method based on a compiled query like "GetEntitiesCompiled().Count()" or "GetEntitiesCompiled().Take(x)". What does Linq2Sql do in the background? This would be very bad, so in this situation I should write a compiled query like "CountEntitiesCompiled". Does he load the result (in this case "GetEntitiesCompiled()") into the memory (mapped to the entity class like "ToList()")? So what situations make sense, when the compiled queries return IQueryable, that query is not able to modify, before request to the Sql-Server. So in my opinion I can just as good return List. Thanks for answers!

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• How to aviod duplication entry via form into database

  - by DAFFODIL

  <?php $con = mysql_connect("localhost","root",""); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("form", $con); $reb = "select count(*) from customer where name = '$name';" if (mysql_result($reb,0) > 0) { echo "Item Already Added!<br>"; } else { // add the item } mysql_close($con); header( 'Location: http://localhost/cus.php' ); ?> Parse error: parse error in C:\wamp\www\c.php on line 10

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