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• In MVVM are DataTemplates considered Views as UserControls are Views?

  - by Edward Tanguay

  In MVVM, every View has a ViewModel. A View I understand to be a Window, Page or UserControl to which you can attach a ViewModel from which the view gets its data. But a DataTemplate can also render a ViewModel's data. So I understand a DataTemplate to be another "View", but there seem to be differences, e.g. Windows, Pages, and UserControls can define their own .dlls, one type is bound with DataContect the other through attaching a template so that Windows, Pages, UserControls can can be attached to ViewModels dynamically by a ServiceLocator/Container, etc. How else are DataTemplates different than Windows/Pages/UserControls when it comes to rendering a ViewModel's data on the UI? And are there other types of "Views" other than these four?

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• How to set Content-Type of a Webbrowser Control?

  - by dr. evil

  Is it possible to set Content-Type of a document in a webbrowser control? Not during the navigate but before setting the DocumentText?

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• DotNetNuke adds wrong module to page

  - by Dr Tom

  I've deployed DotNetNuke 07.03.02 to Azure using Azure's own wizard - worked fine. Been using DNN for years on personal server without issues. However, when I try to add a module to a page (i.e regular editing) DNN adds the wrong module to the page; seemingly FirstOrDefault from the list of installed modules. I.E, I want to add the "HTML" module (or any other) to a page but instead I get the "Banners" module. If I then uninstall the the Banners module it now adds the "Modules list" module. See below example, where I'm editing the "About" page of my site and have tried to add the HTML module. I hope anyone with insight into DNN (on Azure) can provide info. I am a .Net developer, but have so far had no reason to dig into DNN's inner workings.

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• How to save svg canvas to local filesystem

  - by dr jerry

  Is there a way to allow a user, after he has created a vector graph on a javascript svg canvas using a browser, to download this file to their local filesystem? SVG is a total new field for me so please be patient if my wording is not accurate. kind regards, Jeroen.

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• How can I paste an image from the clipboard into a web form?

  - by dr. squid

  I found this question, but the question is about how to get an image from the clip board into a wyziwyg editor! My question is "How can I paste an image from the clipboard into a field (what field is not that big issue as long as it works)", and then sent to the server. Jira has this functionality, so it should be possible! Any ideas on how to do this? Just to explain the complete workflow; I would like to have a plave to multi upload images, where the paste from clipboard also is an option. The upload will be some ajax of some sort, bt is not important in this context! Thanks

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• How can I get the text color of a button using the Substance LaF?

  - by DR

  In my Java application I have to custom-paint a control and for that I need to use the same font colors as JButton. (Enabled an disabled) I don't want to to hard-code them, because the user can change the Substance skin at runtime. I'm aware of the ColorSchemes but I'm not sure how to proceed once I have the color scheme of the current skin. Also the Substance documentation says something about creating your own color scheme, but I just can't figure out the way to retrieve a certain color.

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• Is there a way to reduce the verbosity of using String.Format(...., p1, p2, p3)?

  - by Edward Tanguay

  I often use String.Format() because it makes the building of strings more readable and manageable. Is there anyway to reduce its syntactical verbosity, e.g. with an extension method, etc.? Logger.LogEntry(String.Format("text '{0}' registered", pair.IdCode)); public static void LogEntry(string message) { ... } e.g. I would like to use all my and other methods that receive a string the way I use Console.Write(), e.g.: Logger.LogEntry("text '{0}' registered", pair.IdCode);

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• Is there a more elegant way to act on the first and last items in a foreach enumeration than count++

  - by Edward Tanguay

  Is there a more elegant way to act on the first and last items when iterating through a foreach loop than incrementing a separate counter and checking it each time? For instance, the following code outputs: >>> [line1], [line2], [line3], [line4] <<< which requires knowing when you are acting on the first and last item. Is there a more elegant way to do this now in C# 3 / C# 4? It seems like I could use .Last() or .First() or something like that. using System; using System.Collections.Generic; using System.Text; namespace TestForNext29343 { class Program { static void Main(string[] args) { StringBuilder sb = new StringBuilder(); List<string> lines = new List<string> { "line1", "line2", "line3", "line4" }; int index = 0; foreach (var line in lines) { if (index == 0) sb.Append(">>> "); sb.Append("[" + line + "]"); if (index < lines.Count - 1) sb.Append(", "); else sb.Append(" <<<"); index++; } Console.WriteLine(sb.ToString()); Console.ReadLine(); } } }

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• How to prevent inheritance for some methods?!

  - by Dr TJ

  Hi How can I prevent inheritance of some methods or properties in derived classes?! public class BaseClass : Collection { //Some operations... //Should not let derived classes inherit 'Add' method. } public class DerivedClass : BaseClass { public void DoSomething(int Item) { this.Add(Item); // Error: No such method should exist... } }

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• using win32 api in linux ?

  - by Dr Deo

  I have heard of WINE but I don't like it because it's slow on the computers I have tested and almost always crashes. It also has some unpleasant looking gui. I am wondering if there is a "win32" library in c/c++ for linux that produces native linux code so that if I have my source code for windows, I can just recompile and produce a working linux application. Is this possible?

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• Is there a standard format string in ASP.NET to convert 1/2/3/... to 1st/2nd/3rd...?

  - by Dr. Monkey

  I have an integer in an Access database, which is being displayed in ASP.NET. The integer represents the position achieved by a competitor in a sporting event (1st, 2nd, 3rd, etc.), and I'd like to display it with a standard suffix like 'st', 'nd', 'rd' as appropriate, rather than just a naked number. An important limitation is that this is for an assignment which specifies that no VB or C# code be written (in fact it instructs code behind files to be deleted entirely). Ideally I'd like to use a standard format string if available, otherwise perhaps a custom string (I haven't worked with format strings much, and this isn't high enough priority to dedicate significant time to*, but I am very curious about whether there's a standard string for this). (* The assignment is due tonight, and I've learned the hard way that I can't afford to spend time on things that don't get the marks, even if they irk me significantly.)

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• How can I put inside the block the form API that i created?

  - by Edward Pangilinan

  I created a contact form using form api. I want to put it into block. Any idea about this guys? I'm using drupal 6. Thanks.

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• How can I prevent application domain stealing?

  - by dr jerry

  I'm in the process of making a javascript application and I want to bring that online, lets call it mydesign. I'm living in the Netherlands so mydesign.nl can be mine. Now is mydesign.com available for sale by some domain broker sales bastards. And those bastards don't accept a first bid lower than 1000$ which is a about ten times of the budget I'm willing to pay. So far so good, it's a sick business model but it's there. Now lets imagine that mydesign.nl is a huge success in the Netherlands and I'm makin tons of profits out of advertisements and other things I'm not yet aware of (I know entering the lotery gives a better chance of earning money, but lets just imagine). Is there a way (licence, legal or otherwise) to prevent the sick owners of mydesign.com to download and steal my javascript app and deploy it on their own site and take the profits of my app?

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• Is there an optimal way to render images in cocoa? Im using setNeedsDisplay

  - by Edward An

  Currently, any time I manually move a UIImage (via handling the touchesMoved event) the last thing I call in that event is [self setNeedsDisplay], which effectively redraws the entire view. My images are also being animated, so every time a frame of animation changes, i have to call setNeedsDisplay. I find this to be horrific since I don't expect iphone/cocoa to be able to perform such frequent screen redraws very quickly. Is there an optimal, more efficient way that I could be doing this? Perhaps somehow telling cocoa to update only a particular region of the screen (the rect region of the image)?

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• dropdownlist binding from function in code behind aspx vb

  - by Dr.H

  so I have this working in C# , why it is not working in VB public string[] CustomizedRoles() { int length = Roles.GetAllRoles().Length; string[] arrRoles=Roles.GetAllRoles(); string[] customizedRoles= new string[length+1]; customizedRoles[0] = ""; for (int i = 1; i < length+1; i++) { customizedRoles[i] = arrRoles[i-1]; } return customizedRoles; } asp:GridView.... asp:DropDownList ID="ddlOwnerRolesUpdate" runat="server" DataSource="<%# CustomizedRoles() %" Height="25px" Width="177px" SelectedValue='<%# Bind("Owner") %' where is "Owner" is a data value come from a datasource for the grid it is working fine in C# . in Vb with the same aspx and this code behind it is not working. Public Function CustomizedRoles() As String() Dim length As Integer = Roles.GetAllRoles().Length Dim arrRoles As String() = Roles.GetAllRoles() Dim _customizedRoles As String() = New String(length + 1) {} _customizedRoles(0) = " " For index As Integer = 1 To length _customizedRoles(index) = arrRoles(index - 1) Next Return _customizedRoles End Function can anyone show me how to bind array of string to a dropdownlist from aspx to code behind in VB

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• Reflection: take values from an unknown running alpplication

  - by Dr.Lesh

  I'm writing an application that searchs for Semaphore types in the fields of unknown classes in unknown application (passed by user). I made it using Reflection and it worked. Now I want to fill up these semaphores with values, taking them from a running instance of this unknown application. So i took the class with "main" method of this unknown application, made a newInstance, and passed it when invoking the main method to start the application: Class mainClass = getItSomeWhere(); Object instance = mainClass.newInstance(); Method mainMethod = mainClass.getDeclaredMethod("main", new Class[]{String[].class}); mainMethod.invoke(instance, new Object[]{args}); and it worked fine. Now, how can I get the semaphore values, taking them from the classes of this running application, when I only have an instance of the main class? Many thanks for the answers.

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• Why would my Silverlight 4 Out-of-Browser application just display white?

  - by Edward Tanguay

  My Silverlight application works fine when running in a browser. But when I install it as an out-of-browser application, the Window frame comes up with an appropriate icon and title, but the content of the window is just white. It is in the start menu but when I close it and open again, it is still blank. I reproduced this on Windows 7 and Windows XP. What could be causing my silverlight application to show only white when running out-of-browser? Here are the settings I used:

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• How to cleanup old Failed Builds in TeamCity?

  - by dr. evil

  We do have hundreds of failed builds in TeamCity (number is especially high because of old retry on fail settings) and now it's a pain to browse history. I want to clean up only old failed builds, is there anyway to do that in TeamCity? Normal clean-up policy only allows X days before the last successful build sort of clean ups.

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• In Vim, what is the best way to select, delete, or comment out large portions of multi-screen text?

  - by Edward Tanguay

  Selecting a large amount of text that extends over many screens in an IDE like Eclipse is fairly easy since you can use the mouse, but what is the best way to e.g. select and delete multiscreen blocks of text or write e.g. three large methods out to another file and then delete them for testing purposes in Vim when using it via putty/ssh where you cannot use the mouse? I can easily yank-to-the-end-of-line or yank-to-the-end-of-code-block but if the text extends over many screens, or has lots of blank lines in it, I feel like my hands are tied in Vim. Any solutions? And a related question: is there a way to somehow select 40 lines, and then comment them all out (with "#" or "//"), as is common in most IDEs?

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• Templating Engine to Generate Simple Reports in .NET

  - by dr. evil

  I'm looking for a free templating engine to generate simple reports. I want some basic features such as : Ability to Write Loops (with any IEnumerable) Passing Variables Passing Templates Files (main template, footer, header) I'll use this to generate reports in HTML and XML. I'm not looking for a ASP.NET Template Engine. This is for a WinForms applications. I've seen this question http://stackoverflow.com/questions/340095/can-you-recommend-a-net-template-engine, however all of those template engines are total overkill for me and focused for ASP.NET. Please only recommend free libraries. // I'm still looking an NVelocity but it doesn't look any promising for .NET, overly complicated, when you download it's bunch of files not clear what to do, no tutorial, startup document etc.

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• Zsh command substitution

  - by Dr. Watson

  I usually work with BASH, but I'm trying to setup a cronjob from a machine and user account that is configured with zsh. When the cronjob runs, the date variable does not contain the date, just the string for the command to return the date. DATE=$(date +%Y%m%d) 55 15 * * 1-5 scp user@host:/path/to/some/file/$DATE.log /tmp I've tried using backticks rather than $() around the command, but that did not work either. Is there a special way to do command substitution in zsh?

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• How can I unattach an element from another element in the XAML tree?

  - by Edward Tanguay

  In my Silverlight application, I load all the images I need at application start and store them in a dictionary. Then as I need them I pick them out of the dictionary and attach them in XAML trees etc. However, I have the problem that if I attach an Image object to a Grid, then want to use that image again, it tells me: The image element is already a child of another element. How can I run through my dictionary and "detach all images from parent XAML elements"?

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• can Yahoo and Hotmail contacts api be used without leaving the site?

  - by Dr.Dredel

  I might be missing something but I'm trying to implement a contacts retrieval mechanism akin to the one that is offered by Google for Yahoo and Hotmail. Both APIs seem to require the user to actually go to their sites to log in. The documentation is really convoluted for both. I was hoping someone has done this and can point me to a simple way (if there is one) to allow the user to log in directly in my app and then for me to go and fetch their contacts for them (preferably in XML, but JSON would also do nicely). I currently have a Perl script that goes and gets the gmail stuff and works very nicely. I was (maybe wildly optimistically) hoping that Yahoo and Microsoft would have similarly useful mechanisms.

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• How does the verbosity of identifiers affect the performance of a programmer?

  - by DR

  I always wondered: Are there any hard facts which would indicate that either shorter or longer identifiers are better? Example: clrscr() opposed to ClearScreen() Short identifiers should be faster to read because there are fewer characters but longer identifiers often better resemble natural language and therefore also should be faster to read. Are there other aspects which suggest either a short or a verbose style? EDIT: Just to clarify: I didn't ask: "What would you do in this case?". I asked for reasons to prefer one over the other, i.e. this is not a poll question. Please, if you can, add some reason on why one would prefer one style over the other.

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• How to get the height of an Image in Silverlight?

  - by Edward Tanguay

  I have this code in Silverlight: Image image = new Image(); BitmapImage bitmapImage= TheDatasourceManager.GetBitmapImage("blackPencil"); image.Source = bitmapImage; image.Stretch = Stretch.None; image.HorizontalAlignment = HorizontalAlignment.Left; image.VerticalAlignment = VerticalAlignment.Top; image.Margin = new Thickness(88, 88, 0, 0); grid.Children.Add(image); Now I want to find out the height of the image. in WPF I can get it with image.Source.Height but this is not available in Silverlight bitmapImage.Height doesn't exist either when I debug and examine the image object, I eventually get to PixelHeight which has an accurate height, but I can't seem to access it I find image.ActualHeight but it is 0. How can I get the height of the image?

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