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  • C#: Dynamically instantiate different classes in the same statement?

    - by C. Griffin
    Here is a simplified version of what I'm trying to do: Without having multiple if..else clauses and switch blocks, can I mimic the behavior of Javascript's eval() shudder to instantiate a class in C#? // Determine report orientation -- Portrait or Landscape // There are 2 differently styled reports (beyond paper orientation) string reportType = "Portrait"; GenericReport report; report = new eval(reportType + "Report()"); // Resolves to PortraitReport() The need stems from the fact that I have 6 types of Crystal Reports (that do the same thing, but look drastically different) for 50 states. There are 3 styles each, rather than entertain the notion of a giant switch block with nested if..else statements determining which of 900 reports to use, I was hoping for an eval-like solution.

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  • SharedPreferences.onSharedPreferenceChangeListener not being called consistently

    - by synic
    I'm registering a preference change listener like this (in the onCreate() of my main activity): SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.registerOnSharedPreferenceChangeListener( new SharedPreferences.OnSharedPreferenceChangeListener() { public void onSharedPreferenceChanged( SharedPreferences prefs, String key) { System.out.println(key); } }); The trouble is, the listener is not always called. It works for the first few times a preference is changed, and then it is no longer called until I uninstall and reinstall the app. No amount of restarting the application seems to fix it. I found a mailing list thread reporting the same problem, but no one really answered him. What am I doing wrong?

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  • Changing data in a django modelform

    - by Matt Hampel
    I get data in from POST and validate it via this standard snippet: entry_formset = EntryFormSet(request.POST, request.FILES, prefix='entries') if entry_formset.is_valid(): .... The EntryFormSet modelform overrides a foreign key field widget to present a text field. That way, the user can enter an existing key (suggested via an Ajax live search), or enter a new key, which will be seamlessly added. I use this try-except block to test if the object exists already, and if it doesn't, I add it. entity_name = request.POST['entries-0-entity'] try: entity = Entity.objects.get(name=entity_name) except Entity.DoesNotExist: entity = Entity(name=entity_name) entity.slug = slugify(entity.name) entity.save() However, I now need to get that entity back into the entry_formset. It thinks that entries-0-entity is a string (that's how it came in); how can I directly access that value of the entry_formset and get it to take the object reference instead?

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  • How do I deep copy a DateTime object?

    - by Billy ONeal
    $date1 = $date2 = new DateTime(); $date2->add(new DateInterval('P3Y')); Now $date1 and $date2 contain the same date -- three years from now. I'd like to create two separate datetimes, one which is parsed from a string and one with three years added to it. Currently I've hacked it up like this: $date2 = new DateTime($date1->format(DateTime::ISO8601)); but that seems like a horrendous hack. Is there a "correct" way to deep copy a DateTime object?

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  • Adding references from VBA Causing Password Prompt To Appear

    - by ChloeRadshaw
    EDIT: I WILL GIVE A 300 rep BOUNTY FOR THIS:-) I have run out of ideas. I have a very simple macro that adds references. It looks like I have the same problem as this http://www.eggheadcafe.com/software/aspnet/35651964/excel-prompts-for-vba-pas.aspx Sub testAddSolver() Call AddSolver() End Sub Sub AddSolver() Dim strSolverPath As String Dim wbSolver As Workbook Dim objRef As Object Dim oWB As Object ' NOT as workbook Dim ad As AddIn On Error GoTo errH Set oWB = ActiveWorkbook With Application.AddIns("Solver Add-In") strSolverPath = .FullName On Error Resume Next Set wbSolver = Workbooks(.name) On Error GoTo errH If wbSolver Is Nothing Then .Installed = True End If End With On Error Resume Next Set objRef = oWB.VBProject.References("SOLVER") On Error GoTo errH If objRef Is Nothing Then Call MsgBox(strSolverPath) oWB.VBProject.References.AddFromFile strSolverPath End If Call MsgBox("Compleetd") Exit Sub errH: MsgBox Err.Description, , "Error in AddSolver" End Sub This adding references works fine until I put a password around the VBA at which point it prompts me for a password. I have tried absolutely everything

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  • Lua - Iterate Through Table With nil Values

    - by Tony Trozzo
    My lua function receives a table that is of the array form: { field1, field2, nil, field3, } No keys, only values. I'm trying to convert this to a pseudo CSV form by grabbing all the fields and concatenating them into a string. Here is my function: function ArenaRewind:ConvertToCSV(tableName) csvRecord = "\n" for i,v in pairs(tableName) do if v == nil then v = "nil" end csvRecord = csvRecord .. "\"" .. v .. "\"" if i ~= #tableName then csvRecord = csvRecord .. "," end end return csvRecord end Not the prettiest code by any means, but it seems to iterate through them and grab all the non-nil values. The other table iteration function is ipairs() which stops as soon as it hits a nil value. Is there any easy way to grab all of these fields including the nil values? The tables are various sizes, so I hope to refrain from accessing each part like an array [i.e., tableName[1] through tableName[4]) and just grabbing the nil values that way. Thanks in advance.

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  • Browser Detection Python / mod_python?

    - by cka
    I want to keep some statistics about users and locations in a database. For instance, I would like to store "Mozilla","Firefox","Safari","Chrome","IE", etc... as well as the versions, and possibly the operating system. What I am trying to locate from Python is this string; Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.14) Gecko/2009090216 Ubuntu/9.04 (jaunty) Firefox/3.0.14 Is there an efficient way to use Python or mod_python to detect the http user agent/browser?

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  • Using a priority queue in Java

    - by Bharat
    Forgive me if this is a tried question, but I'm having a little difficulty figuring it out. I currently have a class Node, and each 'node' is a square in a maze. I'm trying to implement the A* algorithm, so each of these nodes will have an f-cost (int) data member inside of it. I was wondering if there's a way that I can create a priority queue of these nodes, and set up the f-cost variable as the comparator? I've looked at examples online, but all I can find are String priority queues. Can I implement Comparator for the Node class? Would this allow me to access the data member stored inside it? Many Thanks!

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  • How cancel shutdown from a windows service C#

    - by scrat789
    Hello everybody I have a windows service started (written in C# .net2.0). I want to detect when the computer shutdown/reboot and cancel it. After the cancel I want do some actions and restart windows. I have tried it, but it not working using Microsoft.Win32; partial class MyService: ServiceBase { protected override void OnStart(string[] args) { SystemEvents.SessionEnding += new SessionEndingEventHandler(OnSessionEnding); } private void OnSessionEnding(object sender, SessionEndingEventArgs e) { e.Cancel = true; //Do some work... } } Another test: partial class MyService: ServiceBase { protected override void OnShutdown() { //Do some work... //base.OnShutdown(); } }

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  • Using HTMLAgility Pack to Extract Links

    - by Soham
    Hi Folks, Consider this simplest piece of code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using HtmlAgilityPack; namespace WebScraper { class Program { static void Main(string[] args) { HtmlDocument doc = new HtmlDocument(); doc.LoadHtml("http://www.google.com"); foreach (HtmlNode link in doc.DocumentNode.SelectNodes("//a[@href]")) { } } } } This effectively doesnt do anything at all, and is copied/inspired from various other StackOverflow questions like this. When compiling this, there is a runtime error which says "Object reference not set to an instance of an object." highlighting the foreach line. I can't understand, why the environment has become irritable to this humble,innocent and useless piece of code. I would also like to know, does HTMLAgilityPack accept HTML classes as nodes?

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  • VCS File Downloading Issue with IE

    - by Sachin Gaur
    I am working on a http based (NOT Secure) Web Application. In this, I have provided a provision to add some appointment to the Client's outlook calendar. I am creating the .vcs file dynamically when clicked on a hyperlink. The code of generating .VCS file is: string calendarFormat = GetVCSFormat(); Response.ContentType = "text/calendar"; Response.AppendHeader("content-disposition", "attachment; filename=MyCalendar.vcs"); Response.Write(calendarFormat); Response.End(); It is working fine in all browsers except IE. It is giving me following error: Internet Explorer cannot download GenerateAppointment.aspx from server. Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later. Can anyone focus some light on it?

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  • rendering JSON in GRAILS with part of the attributes of an object

    - by bsreekanth
    Hello, I am trying to build JSON from two fields. Say, I have a list of object(party), and I only need to pass 2 items as JSON pair. def list = getMyList() //it contains 2 party objects partyTo = array { for (i in list) { x partyId: i.id y partyName: i.toString() } } The JSON string is {"partyTo":[ {"partyId":12}, {"partyName":"Ar"}, {"partyId":9}, {"partyName":"Sr"} ] } when I extract it at the client, it is treated as 4 objects. I wanted as 2 objects, with the below format. {"partyTo":[ {"partyId":12 , "partyName":"Ar"}, {"partyId":9 , "partyName":"Sr"} ] } I'm getting 4 objects, probably because I use an array to build JSON. I'm new to groovy and JSON, so not sure about the right syntax combinations. Any help highly appreciated. thanks.

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  • piping findstr's output

    - by Gauthier
    Windows command line, I want to search a file for all rows starting with: # NNN "<file>.inc" where NNN is a number and <file> any string. I want to use findstr, because I cannot require that the users of the script install ack. Here is the expression I came up with: >findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*.inc" all_pre.txt The file to search is all_pre.txt. So far so good. Now I want to pipe that to another command, say for example more. >findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9]*.inc" all_pre.txt | more The result of this is the same output as the previous command, but with the file name as prefix for every row (all_pre.txt). Then comes: FINDSTR: cannot open | FINDSTR: cannot open more Why doesn't the pipe work? snip of the content of all_pre.txt # 1 "main.ss" # 7 "main.ss" # 11 "main.ss" # 52 "main.ss" # 1 "Build_flags.inc" # 7 "Build_flags.inc" # 11 "Build_flags.inc" # 20 "Build_flags.inc"

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  • Casting in MVVM Light CommandParamterValue

    - by user275561
    here is my Problem, I want to pass the integer 1 when this canvas is pressed. Every time I click the canvas, I get a An unhandled exception of type 'System.InvalidCastException' occurred in GalaSoft.MvvmLight.dll. Now I could make my life easier and just do the RelayCommand to accept a String instead of int but for the sake of learning. How would i go about doing it this way, <i:Interaction.Triggers> <i:EventTrigger EventName="MouseLeftButtonDown"> <cmd:EventToCommand Command="{Binding ButtonPress}" CommandParameterValue="1" </i:EventTrigger> </i:Interaction.Triggers>

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  • How to Maintain per-Client State in a WCF Service?

    - by tbischel
    I've created a WCF service in which I would like it to maintain state between calls from the client. I figured the easiest way to do this was to add this attribute to the service: [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession)] since this is supposed to keep a separate service alive for each client over the life of the client proxy (or timeout in the extreme case). I also added a test function that tracks a list of user inputs, and spits out a concatenated string with all the inputs over the life of the service. When I run this in the test client generated by visual studio, I find that the list I was using to hold past data is reset with each call. Is there something else I need to do to maintain state per session?

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  • 301 versus inline rewrites

    - by Kristoffer S Hansen
    I'm in the process of adding 'pretty' URLs to an existing CMS, the menu is auto generated and the new 'pretty' URLs are to be handled independently as a seperate module. The auto-generated menu allways has URLs that look like this index.php?menu_id=n which ofcourse we would like to see as eg. /news or /products I'm currently at the point where I have to decide if I'm going to rewrite all output of the current system or simply put in a hook where I redirect to the 'pretty' URL. To put it differently, should i connect to the database, fetch all 'pretty' URLs, run through the existing output from WYSIWYG's, news modules, forums etc. and do some str_replace or other string manipulation (which I think would be a rather tedious and boring process), or should I simply hook in and throw a 301 redirecting index.php?menu_id=3 to /news will Google (or other search engines) penalize me for having 301's in the menus?

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  • Redirect console input and output to a textbox.

    - by Peter
    Hi there and thanking in advance I am trying (very hard) to redirect Console input and output into a textbox. So far output is working fine but the trouble is with input. For example I cannot execute a simple program that will do the following: Console.WriteLine("Please enter your name: "); string name = Console.ReadLine(); Console.WriteLine("Hi there " + name); The reason I can't achieve this is because that the program has to stop while waiting for user to type his/her name and press enter. If I wait for user input on a new thread then the main GUI thread freezes and the textbox can never receive the KeyPress. This thing has me totally stumped. Any advice (or better still code) would be greatly appreciated. Cheers

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  • BlackBerry - MainScreen with labels vertical scroll

    - by pajton
    I am trying to create a MainScreen with vertical scrolling. From what I've read in the documentation, MainScreen has a VerticalManager inside, so it should be possible to enable vertical scrolling only with proper construction, i.e: super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); This is not working for me, however. I am creating a screen, adding a couple of LabelFields and no scrollbar, no scrolling at all. I am testing on 8900, OS 5.0. Here is the code I use: public class ExampleScreen extends MainScreen { public ExampleScreen() { super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR); create(); } private void add(String text) { add(new LabelField(text)); } private void create() { add("line 0"); add("line 1"); ... etc ... } } The question is am I doing something wrong? Is there a way to enable vertical scrolling with MainScreen or do I need to create a VerticalManager myself?

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  • How to solve "NullPointerException" with "Server.processing" error while we are using Flex Builder 3

    - by Teerasej
    I am using Flex builder 3, BlazeDS, and Java with Spring and Hibernate framework. I using the remote object to load a string from spring's configuration files. But in testing, I found this fault event like this: RPC Fault faultString="java.lang.NullPointerException" faultCode="Server.Processing" faultDetail="null" I have checked the configuration in remote-config.xml and services-config.xml. But it looks good. Some people have talked about this problem around the Internet and I think you can help me and them. I am using these environment: Flex Builder 3 BlazeDS 3.2.0 JBoss server Full stacktrace: [RPC Fault faultString="java.lang.NullPointerException" faultCode="Server.Processing" faultDetail="null"] at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::faultHandler()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\AbstractInvoker.as:220] at mx.rpc::Responder/fault()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\Responder.as:53] at mx.rpc::AsyncRequest/fault()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\rpc\AsyncRequest.as:103] at NetConnectionMessageResponder/statusHandler()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\messaging\channels\NetConnectionChannel.as:569] at mx.messaging::MessageResponder/status()[C:\autobuild\3.2.0\frameworks\projects\rpc\src\mx\messaging\MessageResponder.as:222]

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  • How to return a result (startActivityForResult) from a TabHost Activity?

    - by pcm2a
    I have 3 classes in my example: Class A, the main activity. Class A calls a startActivityForResult: Intent intent = new Intent(this, ClassB.class); startActivityForResult(intent, "STRING"); Class B, this class is a TabActivity: Intent intent = new Intent(this, ClassC.class); tabHost.addTab... Class C, this class is a regular Activity: Intent intent = this.getIntent(); intent.putExtra("SOMETHING", "EXTRAS"); this.setResult(RESULT_OK, intent); finish(); onActivityResult is called in Class A, but the resultCode is RESULT_CANCELED instead of RESULT_OK and the returned intent is null. How do I return something from the Activity inside a TabHost? I realize that the problem is that my Class C is actually running inside of Class B, and Class B is what is returning the RESULT_CANCELED back to Class A. I just don't know a work around yet.

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  • Ajax cache control

    - by Brian
    Hello, I am having a problem with ajax requests in Internet Explorer and in Chrome - I cannot bust the cache. Normal pages don't have the problem - it's just the ajax requests. I know that one workaround is to append a random query string variable to the end of the URL. However, I don't want to lose all the benefits of caching, I just want the browser to pick up the new file if the version on the server is different from the cached version. I have tried manually setting the ajax POST header, to no avail: xmlHttp.setRequestHeader("Cache-Control", "must-revalidate"); Adding this to my .htaccess file doesn't work either: <FilesMatch "\.(js|css).*" Header set Cache-Control: "max-age=172800, public, must-revalidate" </FilesMatch Any help would be greatly appreciated. Thanks, Brian

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  • jQuery autocomplete pass null paramter to the controller in ASP.NET MVC 2

    - by myaesubi
    I'm using jQuery autocomplete plugin from jQuery website calling the controller url which return json in return. The problem is the parameter sent to the controller is always null. Here is the in-browser jQuery code for the autocomplete: $(document).ready(function() { var url = "/Building/GetMatchedCities"; $("#City").autocomplete(url); }); and here is the ASPNET MVC controller signature in C#: public JsonResult GetMatchedCities(string city) { .. return this.Json(query, JsonRequestBehavior.AllowGet); } Thanks in advance, Mohammad

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  • F# on Mac: Syntax Error on Inner Function

    - by JBristow
    The following code: exception NoElements of string let nth(k, list) = let rec loop count list = match list with | head :: _ when count = k -> head | _ :: tail when count <> k -> loop (count+1) tail | [] -> raise (NoElements("No Elements")) loop 0 list ;; printfn "%A" (nth(2, [1, 1, 2, 3, 5, 8])) Produces the following errors when compiling on a mac, but not in Visual Studio 2010: nth.fs(10,0): error FS0191: syntax error. nth.fs(4,4): error FS0191: no matching 'in' found for this 'let'.

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  • Atomically increment a field using SubSonic 3 ActiveRecord.

    - by cantabilesoftware
    I'm tring to increment a field in a MySQL database using SubSonic 3 ActiveRecord. In SQL, this is what I'm after: UPDATE people SET messages_received=messages_received+1 WHERE people_id=@id_to; I tried the following, but it didn't seem to work (messages_received always seemed to be 1): _db.Update<person>() .Set("messages_received").EqualTo(x => x.messages_received == x.messages_received + 1) .Where(x => x.people_id == idTo) .Execute(); This did work: string sql="UPDATE people SET messages_received=messages_received+1 WHERE people_id=@id_to"; var q=new SubSonic.Query.QueryCommand(sql, _db.Provider); q.AddParameter("id_to", idTo); q.Provider.ExecuteQuery(q); So I have a solution, but I'm just wondering if it's possible to do this without resorting to plain SQL?

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  • jCarousel: Can you remove all items and rebind to a new collection?

    - by Jim G.
    jCarousel documentation states the following: By passing the callback function itemLoadCallback as configuration option, you are able to dynamically create (li) items for the content. {...} jCarousel contains a convenience method add() that can be passed the index of the item to create and the innerHTML string of the item to be created. My Question: Is it possible to remove all items and rebind to a new collection? BTW: I don't necessarily need a "convenience method" to do this. I'm very open to workarounds. FYI: This strategy doesn't seem to work.

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