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Articles indexed in April 2010

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  • Importance of On-Page SEO in Affiliate Marketing

    You may already have heard that search engine optimization or SEO is important in affiliate marketing. Although it is not everything, SEO is indeed important. The higher you rank in the search engine results pages, the more clients you are likely to have.

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  • Filter Queryset in Django inlineformset_factory

    - by Dave
    I am trying to use inlineformset_factory to generate a formset. My models are defined as: class Measurement(models.Model): subject = models.ForeignKey(Animal) experiment = models.ForeignKey(Experiment) assay = models.ForeignKey(Assay) values = models.CommaSeparatedIntegerField(blank=True, null=True) class Experiment(models.Model): date = models.DateField() notes = models.TextField(max_length = 500, blank=True) subjects= models.ManyToManyField(Subject) in my view i have: def add_measurement(request, experiment_id): experiment = get_object_or_404(Experiment, pk=experiment_id) MeasurementFormSet = inlineformset_factory(Experiment, Measurement, extra=10, exclude=('experiment')) if request.method == 'POST': formset = MeasurementFormSet(request.POST,instance=experiment) if formset.is_valid(): formset.save() return HttpResponseRedirect( experiment.get_absolute_url() ) else: formset = MeasurementFormSet(instance=experiment) return render_to_response("data_entry_form.html", {"formset": formset, "experiment": experiment }, context_instance=RequestContext(request)) but i want to restrict the Measurement.subject field to only subjects defined in the Experiment.subjects queryset. I have tried a couple of different ways of doing this but I am a little unsure what the best way to accomplish this is. I tried to over-ride the BaseInlineFormset class with a new queryset, but couldnt figure out how to correctly pass the experiment parameter.

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  • strtok problem in calling

    - by Moony
    I have a function using strtok like this void f1(char *name) { ... char *tmp; tmp = strtok(names, " ,"); while(tmp) { ... tmp = strtok(NULL, " ,"); } ... } And i have a call f1("abc,def"); Problem is that in first call f1 gets abc,def and in 2nd call gets just abc I am confused.. Why is this so?

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  • Modelling Business Logic with NON-Techies

    - by cbmeeks
    The setup: Winform/ASP.NET MVC projects. Learning NHibernate SQL-Server driven apps I work with clients that have no idea how to model an application. That's what I'm for. However, we have lots of conflicts with validation, mis-understandings, etc. For example, the client will ask for an order entry screen. The screen should require a "product". That's fine and dandy. However, the client didn't know to tell me that the user can't order a product of "Class A" unless it's Tuesday. Or, they need a time entry screen. 2 days before it's rolled into production, they casually forgot to mention that certain activities are only valid for certain situations. These situations being a week of coding. That's of course, some crude examples (not by much!). But the problem is getting these non-technical clients to layout their business logic. They somehow didn't realize that the "Class A" problem would come up two weeks later, etc. I'm all for agile programming but is there an easy way to somehow make business logic like this extremely easy to implement and change on almost a daily basis? I of course am splitting the project into hopefully intelligent pieces, using NHibernate, etc. But making this BI logic so dynamic is really making it hard to project timelines, etc. Any suggestions? I know there will never be a perfect client (or a perfect provider) but how do you guys deal with the constant mis-understandings? Thanks.

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  • Hibernate many-to-one - bad usage?

    - by DaveA
    Just trying out Hibernate (with Annotations) and I'm having problems with my mappings. I have two entity classes, AudioCD and Artist. @Entity public class AudioCD implements CatalogItem { @Id @GeneratedValue(strategy = GenerationType.AUTO) private int id; private String title; @ManyToOne(cascade = { CascadeType.ALL }, optional = false) private Artist artist; .... } @Entity @Table(uniqueConstraints = { @UniqueConstraint(columnNames = { "name" }) }) public class Artist { @Id @GeneratedValue(strategy = GenerationType.AUTO) private int id; @Column(nullable = false) private String name; ..... } I get AudioCD objects from an external source. When I try to persist the AudioCD the Artist gets persisted as well, just like I want to happen. If I try persisting another different CD, but Artist already exists I get errors due to constraint violations. I want Hibernate to recognise that the Artist already exists and shouldn't be inserted again. Can this be done via annotations? Or do I have to manage the persistence of the AudioCD and Artist seperately?

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  • Disable autocomplete on textfield in Django?

    - by tau-neutrino
    Does anyone know how you can turn off autocompletion on a textfield in Django? For example, a form that I generate from my model has an input field for a credit card number. It is bad practice to leave autocompletion on. When making the form by hand, I'd add a autocomplete="off" statement, but how do you do it in Django and still retain the form validation?

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  • Problem with jQuery plugin TinySort

    - by Volmar
    I'm trying to sort a list with the help of jQuery and the TinySort-plugin, and it works good but one thing is not working as i want. My Code is: <!doctype html> <html> <head> <meta charset="UTF-8" /> <title>TinySort problem</title> <script type="text/javascript" src="http://so.volmar.se/www/js/jquery.js"></script> <script type="text/javascript" src="http://so.volmar.se/www/js/jquery.tinysort.min.js"></script> <script type="text/javascript"> function pktsort(way){ if($("div#paket>ul>li.sortdiv>a#s_abc").text() == "A-S"){ $("div#paket>ul>li.sortdiv>a#s_abc").text("S-A"); $("div#paket ul li.sortable").tsort("",{place:"org",returns:true,order:"desc"}); }else{ $("div#paket>ul>li.sortdiv>a#s_abc").text("A-S"); $("div#paket ul li.sortable").tsort("",{place:"org",returns:true,order:"asc"}); } } </script> </head> <body> <div id="paket" title="Paket"> <ul class="rounded"> <li class="sortdiv">Sort: <a href="#" onclick="pktsort();" class="active_sort" id="s_abc">A-S</a></li> <li class="sortable">Almost Famous</li> <li class="sortable">Children of Men</li> <li class="sortable">Coeurs</li> <li class="sortable">Colossal Youth</li> <li class="sortable">Demonlover</li> <li class="sortable">Femme Fatale</li> <li class="sortable">I'm Not There</li> <li class="sortable">In the City of Sylvia</li> <li class="sortable">Into the Wild</li> <li class="sortable">Je rentre à la maison</li> <li class="sortable">King Kong</li> <li class="sortable">Little Miss Sunshine</li> <li class="sortable">Man on Wire</li> <li class="sortable">Milk</li> <li class="sortable">Monsters Inc.</li> <li class="sortable">My Winnipeg</li> <li class="sortable">Ne touchez pas la hache</li> <li class="sortable">Nói albinói</li> <li class="sortable">Regular Lovers</li> <li class="sortable">Shaun of the Dead</li> <li class="sortable">Silent Light</li> <li class="addmore"><b>This text is not supposed to move</b></li> </ul> </div> </body> </html> you can try it out at: http://www.volmar.se/list-prob.html MY PROBLEM IS: I don't want the <li class="addmore"> to move above all the <li class="sortable">-elements when i press the sort-link. i wan't it to always be in the bottom. you can find documentation of the TinySort plugin here. i've tried loads of combinations with place and returns propertys but i just can't get it right.

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  • Creating a multi-row "table" as part of a SELECT

    - by Chad Birch
    I'm not really sure how to describe my question (thus the awful title), but it's related to this recent question. The problem would be easily solved if there was some way for me to create a "table" with 4 rows as part of my SELECT (to use with NOT IN or MINUS). What I mean is, I can do this: SELECT 1, 2, 3, 4; And will receive one row from the database: | 1 | 2 | 3 | 4 | But is there any way to receive the following (without using UNION, I don't really want a query that's potentially thousands of lines long with a long list)? | 1 | | 2 | | 3 | | 4 |

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  • How does asp.net MVC remember my false values on postback?

    - by Michel
    Hi, This is working, but how??? I have a controller action for a post: [AcceptVerbs(HttpVerbs.Post )] public ActionResult Edit(Person person) { bool isvalid = ModelState.IsValid; etc. The Person object has a property BirthDate, type DateTime. When i enter some invalid data in the form, say 'blabla' which is obvious not a valid Datetime, it fills all the (other) Person properties with the correct data and the BirthDate property with a new blank DateTime. The bool isvalid has the value 'false'. So far so good. Then i do this: return View(p); and in the view i have this: <%= Html.TextBox("BirthDate", String.Format("{0:g}", Model.BirthDate)) %> <%= Html.ValidationMessage("BirthDate", "*") %> Ant there it comes: i EXPECTED the model to contain the new, blank DateTime because i didn't put any new data in. Second, when the View displays something, it must be a DateTime, because Model.BirthDate can't hold anything but a DateTime. But to my surprise, it shows a textbox with the 'blabla' value! (and the red * behind it) Which ofcourse is nice because the user can seee what he typed wrong, but how can that (blabla)string be transferred to the View in a DateTime field?

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  • C#. Binding object to object

    - by w1z
    Hello all, I develop the part of app functionality. I have the databinding object 'A' and another object 'B'. public class SomeProxy { public SomeProxy(BindingSource A) { var b = new B(); } } public class B { public int SomePropertyFromA{get;set;} //Some autocalculated propeties, that are based on SomePropertyFromA //I want to reculculate them, when the SomePropertyFromA will be changed } 'B' object culculates some values, based on the property 'a' of the 'A' object. I want to bind property in object 'B' to the same property 'a' in 'A'. It's need to handle on changes of the 'a' property, because some UI controls are binded to 'B'-s properties. How can I do this? Sorry for some oddness. Thanks

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  • Can PCRE regex match a null character?

    - by Keng
    I have a text source with nulls in it and I need to pull them out along with my regex pattern. Can regex even match a null character? I only realized I had them when my pattern refused to match and when I pasted it into Notepad++ it showed all the null characters.

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  • Adding new records in Access without wrecking the form

    - by Matt Parker
    I'm working on a simple Access 2003 application to keep track of things that need to be done for clients for some colleagues. Each colleague has a set of clients, and each client has a set of actions that need to be taken by a certain date. I've set up a form that consists of a combobox for client ID (indexed), a drop-down for the person who is handling that client's case, and a button for adding new clients (a standard Access-created Add Record button). The actions are listed in a subform below these three elements. The problem I've run into is that the first person I tested this on clicked the button to add a new record, then didn't fill it out and tried to select another client from the drop-down list. Access interprets this as an attempt to set the selected Client ID as the ID for the new record and rightfully throws an error for duplicate primary keys. I can think of a couple of ways around this problem, but I'd much rather hear your elegant solutions than kludge together some junk in a language I don't know. Let me know if you have any questions. Thank you.

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  • LINQ to SQl updating primary key field?

    - by Curtis White
    I have a linq to sql table/class that uses a GUID as both a primary key and as foreign key. This problem came up when factoring some code that previously worked. The exception generated is "Operation is not valid due to the current state of the object." The process I use is as such: aspnet_User user() = new aspnet_User(); aspnet_user.childTable = new childTable(); .. set some properties user.Insert() -> my custom method ... @ my custom method using (mycontext dc = new context() ) { user.childTable.ID = (Guid)myNewlyCreatedGuid; } The exception occurs on the assignment childTable.set_UserId().

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  • WPF multitrigger referencing 2 other controls

    - by BrettRobi
    I have two CheckBoxes and a TextBox. I want to TextBox to have IsEnabled=False if both CheckBoxes have IsChecked=False. Can I do this with a MultiTrigger? I keep getting errors trying to use the Source property. I have it working with MultiDataTriggers as you can see below. But have two questions. 1) Is this my only choice? Can I do it with a MultiTrigger? <TextBox.Style> <Style TargetType="TextBox"> <Style.Triggers> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding ElementName=uxDmm , Path=IsChecked}" Value="False" /> <Condition Binding="{Binding ElementName=uxGpm , Path=IsChecked}" Value="False" /> </MultiDataTrigger.Conditions> <Setter Property="IsEnabled" Value="False" /> </MultiDataTrigger> </Style.Triggers> </Style> </TextBox.Style> 2) Can I do this outside of the tag? I'm not really sure where Triggers can be applied, most samples do it within Style or DataTemplates, but defining it within a Style is messing up my default look and feel for the TextBox.

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  • Pointers in C with binary file

    - by darkie15
    Hi All, I am reading the contents of the file using fread into an char array. But I am not sure why it is not getting printed in the output. Here is the code: void getInfo(FILE* inputFile) { char chunk[4]; int liIndex; for (liIndex = 0 ; liIndex < 4 ; liIndex++) { fread(chunk, sizeof(char), 4, inputFile); } printf("\n chunk %s", chunk); } Output prints nothing at all. Where am I going wrong? Regards , darkie

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  • ASP-style tags for Perl web development?

    - by Alex R
    I feel like I'm traveling 10 years back in time by asking this, but... Are there any modules, patches, or any "new" version of Perl (released in the last 10 years) to enable writing web-oriented Perl scripts using ASP-style tags? e.g. from ASP/JSP some html <% some code %> more HTML e.g. from PHP some html <? some code ?> more HTML Please don't worry about "why" I'm asking this... It's related to programming language research.

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  • Connect Microsoft Excel To SQL Azure Database

    A number of people have found my post about getting started with SQL Azure pretty useful. But, it's all worthless if it doesn't add up to user value. Database are like potential energy in physics-it's a promise that something could be put in motion. Users actually making decisions based on analysis is analogous to kinetic energy in physics. It's the fulfillment of the promise of potential energy. So what does this have to with Office 2010? In Excel 2010 we made it truly easy to connect to a SQL Azure...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Sneak Peek: New ASP.NET Validation Summary Control

    Check out this image of our upcoming ASP.NET validation summary control, ASPxValidationSummary: ASPxValidationSummary Benefits This new control helps you summarize validation errors from multiple controls and then displays them in a single block. This allows you to organize screen space more effectively if validation is required for several editors. Error entries can be displayed as a table, bulleted or ordered list. And each entry can be presented as a link that moves focus to the corresponding...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Hacking Windows 7 Phone

    So here is the Hack of the Week. For those who have had their heads in the closet and haven't heard Microsoft is coming out with this Windows Phone 7 - the mythical vapor ware for a number of years now has been made public. Like many Silverlight geeks especially we are estatic as this phone now public will run Silverlight as the primary way to develop applications for it. On the downside if you installed the developer kit, the VM for the phone lacks pretty much... um... everything... no sensors,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • XP OEM licensing when reinstalling Windows XP

    - by mindas
    My wife has managed to buy a Dell laptop she was using at her ex-employer that just went bust. The problem with it is the OS (Windows XP) which takes ages to boot and is generally disproportionally slow to the hardware of the machine. So my aim is to sacrifice a day and reinstall it. The problem I am slightly worried about is the licensing/registration/activation hell. Apart from the sticker (with WinXP license key), the laptop has no other paperwork proving this license is legitimate. I believe this was originally an OEM license. Unfortunately, I don't have the the installation CD. This computer also has MS Office installed (which I would like to retain) but it none of MS Office apps would launch due to some obscure error complaining about lack of free disk space (which computer has plenty of). I have absolutely no clue what kind of license this MS Office was. And because the company has gone into the administration, there is no way of getting this information nor installable media. I believe that by buying the hardware I have also acquired the software which I can use as I see fit. Correct me if I'm wrong. Above said, my question would be: What is the easiest way of reinstalling the XP? By easiest I mean avoiding spending my time to prove Microsoft support I've got the right to use the software (insert your computer says noooo joke here) but still being able to get to fresh virgin activated legal state of the XP. I used to work as a sysadmin many years ago so I am not afraid of any technical difficulties. The same question applies to MS Office. I imagine the process would consist of backing up all the data, pulling some bits from the registry and using that on the fresh install. As for reinstall I'd expect to use some sort of OEM Windows repair CD from Dell, right? Are those freely available? My other box (HP) has such a thing and it can't be used on any other brand. I'm sure somebody had to go through this licensing hell and could share his/her tips. Thanks in advance.

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  • How can I use a computer as a router and send all client traffic through anonymous proxies?

    - by Terrapin
    Is there a way that I can setup a spare box as a router on my network, and route client traffic through a proxy in order to hide my location? Specifically, I would like internet traffic to/from my Roku Box to be routed via proxy, but there is no proxy support built in to the Roku. So I would like wire my Roku directly my computer's second NIC, and force all traffic through a proxy. What kind of software and hardware setup will I need? Also, which anonymous proxy service are best for this purpose? I'm not interesting in full anonymity or encryption. I simply want to mask my location while providing the best possible throughput.

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  • startx doesnt run gives an error xauth unable to link authority files

    - by Sandeep
    I have installed windows xp on VPC and have installed cygwin-x on that virtual machine. When i run startx command. I get the following error: xauth: creating new authority file /home/Administrator/.serverauth.1480 xauth: unable to link authority file /home/Administrator/.serverauth.1480, use /home/Administrator/.serverauth.1480-n xauth: creating new authority file /home/Administrator/.Xauthority xauth: creating new authority file /home/Administrator/.Xauthority xauth: unable to link authority file /home/Administrator/.Xauthority, use /home /Administrator/.Xauthority-n xauth: creating new authority file /home/Administrator/.Xauthority xauth: creating new authority file /home/Administrator/.Xauthority xauth: unable to link authority file /home/Administrator/.Xauthority, use /home /Administrator/.Xauthority-n giving up. xinit: No such file or directory (errno 2): unable to connect to X server xinit: No such process (errno 3): Server error. xauth: creating new authority file /home/Administrator/.Xauthority

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