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• Find selected WPF Listbox entries

  - by wonea

  I've been trying iterate through the selected items of a listbox in WPF, with the following code; try { for (int i = 0; i < mylistbox.SelectedItems.Count; i++) { ListItem li = (ListItem)mylistbox.SelectedItems[i]; string listitemcontents_str = li.ToString(); } } catch(Exception e) { // Error appears here string error = e.ToString(); } However I receive an invalid cast exception; System.InvalidCastException: Unable to cast object of type 'mylist' to type 'System.Windows.Documents.ListItem'. Is there a way around this?

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• Desimal data Type Display scale part as zero

  - by Wael Dalloul

  I have Decimal field in SQLserver 2005 table, Price decimal(18, 4) if I write 12 it will be converted to 12.0000, if I write 12.33 it will be converted into 12.3300. Always it's putting zero to the right of the decimal point in the count of Scale Part(4). I was using these in SQL Server 2000, it was not behaving like this, in SQL Server 2000 if I put 12.5 it will be stored as 12.5 not as 12.5000 what SQLServer2005 do. My Question is how to stop SQL Server 2005 from putting zeros to the right of the decimal point?

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• Mac OS X 10.5+ and POSIX

  - by Phil

  Hello, I need to program an authentication module that has to work with Mac OS X 10.6 Snow Leopard and at the same time needs to be POSIX-compliant. I read here: developer.apple.com/leopard/overview/osfoundations.html that since Mac OS X 10.5 Leopard, Mac OS X is POSIX-compliant (to POSIX 1003.1), but working under MAC OS X 10.5 Leopard myself, I can't find any trace of my user name neither in /etc/passwd nor in its successor /etc/master.passwd, which is mentioned here: developer.apple.com/mac/library/DOCUMENTATION/Darwin/Reference/ManPages/man5/passwd.5.html Instead it says in both files OpenDirectory Service is used, which should be OpenLDAP according to the OpenDirectoryService man-page. Is this still POSIX-compliant ? I guess not. I wonder how Mac OS X would handle my 100% POSIX-compliant code which depends on /etc/passwd ? I would be gratefull if someone could explain the way this works to me. Thank you for your time and trouble. Best regards Phil.

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• Is there a way to animate on a Home Widget?

  - by David

  Hi All, I want to use an animation on a Home page Widget, i.e. an AppWidgetProvider. I was hoping to use the "Frame Animation" technique: http://developer.android.com/guide/topics/graphics/2d-graphics.html#frame-animation which I've used successfully in an activity. But I can't translate that code to an AppWidgetProvider. Basically, in an AppWidgetProvider, I create and work with a RemoteViews object, which AFAIK doesn't provide me with a method to get a reference to an ImageView in the layout for me to call start() on the animation. There is also not a handler or a callback for when the widget displays so I can make the start() call. Is there another way this can be done? I suppose that I can probably do the animation on my own with very fast onUpdate() calls on the widget, but that seems awfully expensive.

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• Programatically WPF Fade In (via extension methods)

  - by Dinis Cruz

  I'm trying to write a simple (stand alone) C# extension method to do a Fade-In of a generic WPF UIElement, but the solutions (and code samples) that I found all contain a large number of moving parts (like setting up a story, etc...) For reference here is an example of the type of API method I would like to create. This code will rotate an UIElement according to the values provided (fromValue, toValue, duration and loop) public static T rotate<T>(this T uiElement, double fromValue, double toValue, int durationInSeconds, bool loopAnimation) where T : UIElement { return (T)uiElement.wpfInvoke( ()=>{ DoubleAnimation doubleAnimation = new DoubleAnimation(fromValue, toValue, new Duration(TimeSpan.FromSeconds(durationInSeconds))); RotateTransform rotateTransform = new RotateTransform(); uiElement.RenderTransform = rotateTransform; uiElement.RenderTransformOrigin = new System.Windows.Point(0.5, 0.5); if (loopAnimation) doubleAnimation.RepeatBehavior = RepeatBehavior.Forever; rotateTransform.BeginAnimation(RotateTransform.AngleProperty, doubleAnimation); return uiElement; }); }

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• How to get number of rows deleted from mysql in schell script

  - by simonlord

  Hi all I can't work out how to get the mysql client to return the number of rows deleted to the shell when running a delete. Does anyone know what option will enable this? Or ways around it? Here's what i'm trying, but i get no output: #!/bin/bash deleted=`mysql mydb -e "delete from mytable where insertedtime < '2010-04-01 00:00:00'"|tail -n 1` I was expecting something like this as the output from mysql: deleted 999999 Which is why i have the tail -n 1 so i only pick up the count and not the column name. Any help would be most appreciated.

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• ASP.NET MVC NullReferenceException when inheriting from a Base Controller

  - by rockinthesixstring

  I've got a base controller that I inherit all of my Controllers from. It's job is to basically set caching and error handling as well as check for mobile browsers. My UI works fine, but my Unit Tests are failing. Imports System.Web.Mvc <HandleError()> _ <CompressFilter()> _ <OutputCache(Duration:=30, VaryByParam:="id")> _ Public Class BaseController : Inherits System.Web.Mvc.Controller Protected Overrides Function View(ByVal viewName As String, ByVal masterName As String, ByVal model As Object) As System.Web.Mvc.ViewResult Dim ismobile As Nullable(Of Boolean) = Request.Browser.IsMobileDevice If ismobile Then Return MyBase.View(viewName, "Mobile", model) Else Return MyBase.View(viewName, "Site", model) End If End Function End Class The error I'm getting in my Unit test is on Dim ismobile As Nullable(Of Boolean) = Request.Browser.IsMobileDevice saying Object Reference Not Set To An Instance Of An Object.

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• Download and write .tar.gz files without corruption.

  - by arbales

  I've tried numerous ways of downloading files, specifically .zip and .tar.gz, with Ruby and write them to the disk. I've found that the file appears to be the same as the reference (in size), but the archives refuse to extract. What I'm attempting now is: Thanks! def download_request(url, filePath:path, progressIndicator:progressBar) file = File.open(path, "w+") begin Net::HTTP.get_response URI.parse(url) do |response| if response['Location']!=nil puts 'Direct to: ' + response['Location'] return download_request(response['Location'], filePath:path, progressIndicator:progressBar) end # some stuff response.read_body do |segment| file.write(segment) # some progress stuff. end end ensure file.close end end download_request("http://github.com/jashkenas/coffee-script/tarball/master", filePath:"tarball.tar.gz", progressIndicator:nil)

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• OOP App Architecture: Which layer does a lazy loader sit in?

  - by JW

  I am planning the implemention an Inheritance Mapper pattern for an application component http://martinfowler.com/eaaCatalog/inheritanceMappers.html One feature it needs to have is for a domain object to reference a large list of aggreageted items (10,000 other domain objects) So I need some kind of lazy loading collection to be passed out of the aggregate root domain object to other domain objects. To keep my (php) model scripts organised i am storing them in two folders: MyComponent\ controllers\ models\ domain\ <- domain objects, DDD repository, DDD factory daccess\ <- PoEAA data mappers, SQL queries etc views\ But now I am racking my brains wondering where my lazy loading collection sits. Any suggestions / justifications for putting it in one place over another another? DDD = Domain Driven Design Patterns, Eric Evans - book PoEAA = Patterns of Application Architecture Patterns, Martin Fowler - book

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• Validation errors from Google App Engine Logout link

  - by goggin13

  I am making a web page using the Google App Engine. I am validating my pages, and found that the logout link that is generated by the call to the users api (in python) users.create_logout_url(request.uri) does not validate as XHTML 1.0 Strict. The href in the anchor tag looks like this: /_ah/login?continue=http%3A//localhost%3A8080/&action=Logout Including a link with this anchor text throws three different validation errors: *general entity "action" not defined and no default entity *reference to entity "action" for which no system identifier could be generated *EntityRef: expecting ';' Here is a dummy page with the anchor tag in it, if you want to try it on w3c validator.Dummy Page. The logout link wont work, but you can see how the page is valid without it, but the actual text inside the href tag breaks the validation. Any thoughts on whats going on? Thank you!

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• How to prune data set by frequency to conform to paper's description

  - by sakura90

  The MovieLens data set provides a table with columns: userid | movieid | tag | timestamp I have trouble reproducing the way they pruned the MovieLens data set used in: Tag Informed Collaborative Filtering, by Zhen, Li and Young In 4.1 Data Set of the above paper, it writes "For the tagging information, we only keep those tags which are added on at least 3 distinct movies. As for the users, we only keep those users who used at least 3 distinct tags in their tagging history. For movies, we only keep those movies that are annotated by at least 3 distinct tags." I tried to query the database: select TMP.userid, count(*) as tagnum from (select distinct T.userid as userid, T.tag as tag from tags T) AS TMP group by TMP.userid having tagnum >= 3; I got a list of 1760 users who labeled 3 distinct tags. However, some of the tags are not added on at least 3 distinct movies. Any help is appreciated.

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• Concise description of the lua vm?

  - by anon

  I've skimmed Programing in Lua, I've looked at the Lua Reference. However, they both tells me this function does this, but not how. When reading SICP, I got this feeling of: "ah, here's the computational model underlying scheme"; I'm trying to get the same sense concerning lua -- i.e. a concise description of it's vm, a "how" rather than a "what". Does anyone know of a good document (besides the C source) describing this? Thanks!

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• Avoiding "variable might not have been initialized"

  - by Mason Wheeler

  I recently ran across a routine that looks something like this: procedure TMyForm.DoSomething(list: TList<TMyObject>; const flag: boolean); var local: integer; begin if flag then //do something else local := ExpensiveFunctionCallThatCalculatesSomething; //do something else for i := 0 to list.Count do if flag then //do something else if list[i].IntValue > local then //WARNING HERE //do something else end; This gives Variable 'local' might not have been initialized even though you can tell by reading the code that you won't hit that line unless the code branch that initializes it has run. Now, I could get rid of this warning by adding a useless local := 0; at the top of the procedure, but I wonder if there might not be a better way to structure this to avoid the issue. Anyone have any ideas?

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• Retrieving Top 10 rows ans sum all others in row 11

  - by Mario

  Hello all, I have the following query that retrieve the number of users per country; SELECT C.CountryID AS CountryID, C.CountryName AS Country, Count(FirstName) AS Origin FROM Users AS U INNER JOIN Country AS C ON C.CountryID = U.CountryOfOrgin GROUP BY CASE C.CountryName, C.CountryID What I need is a way to get the top 10 and then sum all other users in a single row. I know how to get the top 10 but I`m stuck on getting the remaining in a single row. Is there a simple way to do it? For example if the above query returns 17 records the top ten are displayed and a sum of the users from the 7 remaining country should appear on row 11. On that row 11 the countryid would be 0 and countryname Others Thanks for your help!

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• How to update assmebly version info with new build and revision during build?

  - by hrushikesh

  I have to update the build number in assembly version of assemblyinfo.cs file. I have written a custom tasks which updates all the assmeblyinfo.cs under a solution before starting build. But when i change this file and try to build then some of my dlls which has reference of other dlls not able to compile as they dont find the specific version assembly. I have some files which uses strong name assembly also. Not sure how to update their version. I have tried setting specific version to false,but still same error is coming. Can you anybody tell me the good way to update the assemblyinfo.cs with incremental build number? P.S. i am using NANT tasks for automating by builds.

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• where is everything in django admin?

  - by FurtiveFelon

  Hi all, I would like to figure out where everything is in django admin. Since i am currently trying to modify the behavior rather heavily right now, so perhaps a reference would be helpful. For example, where is ModelAdmin located, i cannot find it anywhere in C:\Python26\Lib\site-packages\django\contrib\admin. I need that because i would like to look at how it is implemented so that i can override with confidence. I need to do that in part because of this page: http://docs.djangoproject.com/en/dev/ref/contrib/admin/#modeladmin-methods, for example, i would like to override ModelAdmin.add_view, but i can't find the original source for that. As well as i would like to see the url routing file for admin, so i can easily figure out which url corresponding to which template etc. Thanks a lot for any pointers!

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• Invalid SQL Query

  - by svovaf

  I have the next query that in my opinion is a valid one, but I keep getting error telling me that there is a proble on "WHERE em.p4 = ue.p3" - Unknown column 'ue.p3' in 'where clause'. This is the query: SELECT DISTINCT ue.p3 FROM table1 AS ue INNER JOIN table2 AS e ON ue.p3 = e.p3 WHERE EXISTS( SELECT 1 FROM ( SELECT (COUNT(*) >= 1) AS MinMutual FROM table4 AS smm WHERE smm.p1 IN ( SELECT sem.p3 FROM table3 AS sem INNER JOIN table2 AS em ON sem.p3 = em.p3 WHERE em.p4 = ue.p3 AND sem.type = 'friends' AND em.p2 = 'normal' ) AND smm.p5 IN ( 15000,15151 ) ) AS Mutual WHERE Mutual.MinMutual = TRUE) LIMIT 11 If I execute the sub-query which is inside the EXISTS function, everything is O.K. PLEASE HELP!

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• Syntax Error with MySQL 5.1 Server

  - by Mr.Z

  I am trying to connect to a server remotely using the command line client window. I am using MySQL 5.1 and I do not know why I am getting syntax error. If you can help me, that would be much appreciated. username as user password as pass hostname as example.com I have tried: mysql> -u user -h example.com -p ; mysql> -h example.com -u user -p ; I have looked at the reference manual and other verisons of remote connection with Server 5.1 but I can't see the syntax error.

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• jQuery object are immutable?

  - by Daniel

  Hello a new noob on jQuery here and I was wondering if jQuery objects are immutable. For example: var obj1 = $("<tag></tag>"); var obj2 = obj1.append("something"); Will obj1 and obj2 be the same meaning obj2 will reference obj1? UPDATE: The above example kind of scratches the surface of what i want to know, a more accurate question is : If i chain function from the jQuery api will they return the same object or a new one (as the case with strings in Java)?

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• Could not see memory being released on closing MFC modal dialog that hosts wpf user control using HW

  - by Naveen Chiluka

  This is in continuation with my last question posted "Continuous Memory leak while using WpfHWndSource" I have to load an WPF User Control in an MFC Modal Dialog that is being invoked from the ocx control. For this I have created a MFC Regular Dll(Mixed Mode Regular dll with clr option enabled), I have created a modal dialog which will host wpf user control using HWndSource. This exported dialog is placed as a child Dialog of the above MFC dialog that is being invoked from the ocx. Ny intermediate dialog uses C++/Cli code. When the main MFC dialog is closed, I am deleteing the ptr reference of the intermediate dialog created on the heap. In the the dipose of the .Net User Control, I have set most of the references that I have created to null, unsubscribed to the events (to avoid weak refernces), unbinded from the propertes(by using clear binding). Called delete on the HwndSource and the user control(which basically calls the dispose method). But I do not see complete memory being released. Any help would be greatful.

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• Why is the dictionary debug visualizer less useful in Visual Studio 2010?

  - by Kevin

  I was debugging in Visual Studio 2010, which we just installed and trying to look at a dictionary in the quick watch window. I see Keys and Values, but drilling into those shows the Count and Non-Public members, Non-Public members continues the trail and I never see the values in the dictionary. I can run test.Take(10) and see the values, but why should I have to do that. I don't have VS 2008 installed anymore to compare, but it seems that I could debug a dictionary much easier. Why is it this way now? Is it just a setting I set somehow on my machine? Test code: Dictionary<string, string> test = new Dictionary<string, string>(); test.Add("a", "b");

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• Rails with DB2 and multiple schemas

  - by GNUMatrix

  I have a 'legacy' DB2 database that has many other applications and users. Trying to experiment with a rails app. Got everything working great with the ibm_db driver. Problem is that I have some tables like schema1.products, schema1.sales and other tables like schema2.employees and schema2.payroll. In the ibm_db adapter connection, I specify a schema, like schema1 or schema2, and I can work within that one schema, but I need to be able to easily (and transparently) reference both schemas basically interchangeably. I don't want to break the other apps, and the SQL I would normally write against DB2 doesn't have any of these restrictions (schemas can be mixed in SQL against DB2 without any trouble at all). I would like to just specify table names as "schema1.products" for example and be done with it, but that doesn't seem to jive with the "rails way" of going about it. Suggestions?

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• [qt] Display the text according to QTextedit

  - by sterh

  Hi to all, in this question i asked how to split text by whitespace, now i split it, but now i can't display this text in QTextEdit. I make so: QStringList list = line.split(QRegExp("\\s+")); for (int i = 0; i < list.count(); i++){ table.push_back(list[i]); this->ui->textEdit->setText(table[i]); //output text in qtextedit } But i see clean textedit after that. But if i make for example: this->ui->textEdit->setText(table[2]); I see third word in QTextEdit. What's wrong? Thank you.

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• retrive file line one by one using C#?

  - by riad

  Dear all, I have a file name abc.txt.On that file have some lines like this: jani 50,south carolina,USA karim 16,roam,Italy fara 52,sydny,Australia first line is name and second line is address.Now i need the info name on a string let say nameString and address is let say addressString.How can i do it using C#? I write a code in PHP its working smoothly.I need the same thing in C#.For yours clarification here is the php code: $file=file_get_contents('abc.txt'); $arr=explode("\n",$file); for ($i=0;$i<count($arr);$i=$i+2) { $name=$arr[$i]; $address=$arr[$i+1]; echo $name ."<br/>"; echo $address. "<br/>"; } How can i do the same thing in C#???? Another question: IS their any function in C# as like as explode in php? thanks in advance riad

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• How can I Query only __key__ on a Google Appengine PolyModel child?

  - by Gabriel

  So the situation is: I want to optimize my code some for doing counting of records. So I have a parent Model class Base, a PolyModel class Entry, and a child class of Entry Article: How would I query Article.key so I can reduce the query load but only get the Article count. My first thought was to use: q = db.GqlQuery("SELECT __key__ from Article where base = :1", i_base) but it turns out GqlQuery doesn't like that because articles are actually stored in a table called Entry. Would it be possible to Query the class attribute? something like: q = db.GqlQuery("select __key__ from Entry where base = :1 and :2 in class", i_base, 'Article') neither of which work. Turns out the answer is even easier. But I am going to finish this question because I looked everywhere for this. q = db.GqlQuery("select __key__ from Entry where base = :1 and class = :2", i_base, 'Article')

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