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• C# Reset a property

  - by Jeff

  I'm writing a Clone function for a non serializeable object.For most objects I don't care if they are shallow copied as I won't be making any changes to them. I start with a MemberwiseClone and this copies all the values and few objects like configuration dictionary over just fine but they are pointers. EAVEntity newClone = (EAVEntity) this.MemberwiseClone(); newClone.EntityStorageID = Guid.NewGuid(); newClone.Controls.Clear(); So how do I reset a pointer so I can make them not point at the same location?

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• Should I inherit from a stackpanel instead of a stack panel, grid or other UI element or UserControl

  - by Joel Barsotti

  So I'm building a peice of UI that might me in a dialog window or might be in embedded in part of a bigger page. I don't have alot of experience with WPF, but in ASP.NET you always used UserControls, because their wasn't anyt really generic UI inherit to inherit from (and in a way UserControl was just a div). My coworker has written alot of controls that inherit directly from stackpanel. That seems like a decent way of doing things. But when I went to create a control for the code I was going to write I was presented with a dialog that only included the UserControl, which I wasn't that familiar with in the context of WPF. So can someone explain to me the difference from building a control that inherits from user control vs inheriting directly from a stackPanel?

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• Greek/latin scientific JLabel in Java Swing application

  - by MartinStettner

  For a scientific application I want to design an input form which lets the user enter certain parameters. Some of them are designated using greek letters, some of them have latin letters. The parameter names should be displayed using ordinary JLabel controls. On Windows, the Tahoma font (which is used for Labels by default) contains both latin and greek letters, so I simply set the Text property of the label to a greek (unicode) string and everything works fine. I'm wondering if this works also without modifications on Linux and OSX systems resp. for which Java/OS versions this would work. Also I'm curious if there's an easy way to show subscripts in labels ("\eta_0" in TeX), but this is not that important for my application ...

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• WPF Skin Skinning Security Concerns

  - by Erik Philips

  I'm really new to the WPF in the .Net Framework (get that out of the way). I'm writing an application where the interface is very customizable by simply loading .xaml (at the moment a Page element) files into a frame and then mapping the controls via names as needed. The idea is to have a community of people who are interested in making skins, skin my application however they want (much like Winamp). Now the question arises, due to my lack of Xaml knowledge, is it possible to create malicious Xaml pages that when downloaded and used could have other embedded Iframes or other elements that could have embed html or call remote webpages with malicious content? I believe this could be the case. If this is the case then I two options; either I have an automated process that can remove these types of Xaml files by checking it’s elements prior to allowing download (which I would assume would be most difficult) or have a human review them prior to download. Are there alternatives I’m unaware of that could make this whole process a lot easier?

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• Javascript undefined variable

  - by djairo

  I have a problem with a javascript error: $("#slider") is undefined How can i solve this problem? <script type="text/javascript"> $(document).ready(function() { $("#slider").easySlider({ controlsBefore: '<p id="controls">', controlsAfter: '</p>', prevId: 'prevBtn', nextId: 'nextBtn' }); }); </script> This is my html <div id='slider'> <table> <tr> <td width='325'>hello</td> <td width='325'>hello</td> </table> </div>

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• HTML5 video problem

  - by mathiregister

  hey guys, i wonder what i'm doing wrong? <video id="movie" width="320" height="240" preload controls> <source src="pr6.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"' /> <source src="pr6.webm" type='video/webm; codecs="vp8, vorbis"' /> <source src="pr6.ogv" type='video/ogg; codecs="theora, vorbis"' /> </video> this peace of code lies in my index.html. in the same directory i got all 3 videofiles (mp4, webm, ogv) Somehow the video component shows up, however no video gets played. A big X shows up inside of the video component.

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• How do I blur (ios7 style) a section of an image in a UITableViewCell?

  - by George McKibbin

  I've got a UIImageView that takes up the whole cell and shows an image. I'd like to blur the bottom third of the view in the iOS7 style (we're targeting iOS7). There will be a label over the blurred part. The issue seems to be that I can't "screenshot" the UIImageView right as I am setting up the cell in tableView:cellForRowAtIndexPath: as it hasn't loaded yet. Although i've even tried setting up a timer for a 0.1 second delay and that also doesn't work. I've tried the stuff on http://damir.me/posts/ios7-blurring-techniques I've tried https://github.com/justinmfischer/7blur I'd like to use the new screenshotting API drawViewHierarchyInRect:afterScreenUpdates: I'd also like to use apple's sample code UIImage+ImageEffects The only thing that has worked so far has been to just put a UIToolbar in but the performance is really slow. I don't need dynamic updates. I've managed to get the following effect a few times but it has just tinted the view and hasn't actually blurred anything so I'm a bit confused.

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• How Can I Add a New Command to a Control's Event

  - by Chris

  Hi, thanks for taking a look at this question. I have been building an application (VB/WPF) following Josh Smith's example of an MVVM pattern: Click here to view My Views have Controls which trigger a Command upon an event, such as a button click and these are bound to properties in the ViewModel. My ViewModel exposes properties of type ICommand which invoke the appropriate methods. This has worked well, until now! I now want to use a Thumb Control to allow a user to move an object within a Canvas. I don't believe that the Thumb has a Command capability 'out of the box'. A Thumb raises a 'DragDelta' event when being moved. So my question is as follows: How do I extend a Control's capability to issue a Command upon an event please? I wish to issue a new Command, let's say 'onDragDelta' so that I can bind it to a property in my ViewModel just like my Buttons. Thank you very much

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• Chart Control Inside SSRS ReportViewer is Viewable From Localhost But Not Internet

  - by Daniel Coffman

  A project I own was just moved from an older server to a new one, and in the process of moving the web folder, re-deploying the SSRS reports, restoring the database, configuring IIS, etc... I have lost the ability to view the Microsoft Chart Controls that are embedded in the SSRS reports, that are then displayed by a Microsoft.ReportViewer. I could view them both locally and remotely (via the internet) on the old server. I can view them if I preview the SSRS report in Visual Studio. The report displays fine, only missing all the embedded charts. I can still view them locally through the web browser, just not from the internet. What am I missing? I tried giving permissions to the ChartImageHandler temp storage folder, but it didn't work. I'm getting the Javascript error: Error: ClientReport380ec8ca0c294a809e9986c1bef9db1c is undefined

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• Difference in DLL when compiling on Build Server instead of Dev Machine.

  - by Achilles

  I have an application that loads user controls into .NET web application. When I compile and test the application locally on my dev machine it works on my machine. The project builds successfully using MSBuild on our build server. However when I deploy the dll generated by MSBuild on the build server I get the following error when the application loads the control: BC30456: 'CreateResourceBasedLiteralControl' is not a member of 'ASP.usercontrols_somecontrol_ascx'. I took a look and compared the dll generated on my machine and compared it(looked at the file size) with the one created by the build server and noticed a difference in the file size. This is confusing considering the code being built locally and on the build server is IDENTICAL. I manually compared each file by hand. So my question is: What is causing this error? What would be different between MSBuild's compilation of the code and what is going on in Visual Studio when compiling the code?

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• Why does asp.net mvc form submits itself on button clicks when javascript function error?

  - by melaos

  hi guys, i'm new to the asp.net mvc, and while working on this, i used very basic asp.net mvc stuff like beginform, etc. i used a lot of jquery codes this round for client side validation, ajax data retrieval, and other gui works. and i used a combinations of html inputs buttons, etc and the asp.net mvc type of controls. what i noticed is that whenever i click on a button control, which sometimes are tied to either jquery oclick events, when there's a javascript error, the page will just go on and submit. why is this happening and what am i missing here? my bad for the dumb questions.. thanks

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• integrating django-paypal

  - by ramdaz

  Hi I am trying to integrate Django-Paypal onto a site, where once the customer makes a payment I need to send a dynamic URL from which the user can download some specific information. I am registering all users to a URL which allows them to buy the document. The URL which can only be accessed by a registered user with a verified email ids using django-registration, allows the user to connect to paypal and make payment. How do I capture the signal and verify which user has made the payment for which product he/she is purchased, based on this information 1) I need to know two information, which user made the payment, and for which product did he or she make the payment? 2) Only if I have these information can I send the right UR:L by email. Any help appreciated. I am not very sure how django-signals work. What all details does payment_was_successful signal return? I am using IPN

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• Hidden Features of Visual Studio winforms designer

  - by CodingBarfield

  One of the most loved and hated feautures of visual studio must be the form designer. Creating a simple form/user control layout usually is a breeze. Setting properties and adding events is easy. Setting up the toolbox to use you own controls can be a bit harder and getting the ToolBoxIcons to show up can be a pain. Using third party components by visual inheritance can throw of the designer. And using multiple inheritance on designerables can be really hard. So what are your favorite 'hidden' and or obvious visual studio designer features.

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• How do I get all values from a listbox that are not selected in ASP.NET MVC

  - by Nick Reeve

  Hello, I have a form that (amongst other things) contains 2 multi-select listboxes. Basically you can add items to the one on the right from the full list of items on the left using some add/remove buttons. The problem is that I cannot see a way of picking up the contents of the listbox when posting back to the controller. I have followed this example: http://ittecture.wordpress.com/2009/04/30/tip-of-the-day-198-asp-net-mvc-listbox-controls/ This works fine if you have actually selected the items in the listbox before posting. That's not really the way I think this UI should behave though. Hope that makes sense, Nick

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• Security exception with ASP.NET AJAX toolkit

  - by Rod

  I've got an ASP.NET WebForms app that I've written, which uses the ASP.NET AJAX Toolkit. I've put the MultiView control onto the web form, and it worked fine, when I had it under Vista. Well, I had to replace my machine (HD failed) and I went to Windows 7 Ultimate. I tried copying the ASP.NET app from the system (before it finally failed for good) and put it onto the Windows 7 machine. I can bring up the app fine, go to all pages, but the one with these controls on it. When I do I get the following error: Security Exception Description: The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. What's going on? How do I fix it?

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• Engine finish() causes segmentation fault

  - by Becky

  Hello All - I am using M2Crypto revision 723 from the repository. I am trying to clean up my engine. If I have the pkcs11.finish() line in my script, the script finishes but gets a segmentation fault at the end. Without the finish() line, no segmentation fault occurs. Is there something wrong with the way I'm using finish()? dynamic=Engine.load_dynamic_engine("pkcs11","/usr/local/ssl/lib/engines/engine_pkcs11.so") pkcs11 = Engine.Engine("pkcs11") pkcs11.ctrl_cmd_string("MODULE_PATH", "/usr/lib/libeTPkcs11.so") pkcs11.init() # next few steps which I deleted pass password and grab key & cert off token pkcs11.finish() Engine.cleanup() Thanks!

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• dynamically created datagridview columns not accessible unless added to a form...why?

  - by deostroll

  We simply created a DataGridView control dynamically and bound it to a DataTable. We were tying to style certain columns. But, when we tried to access the columns we got a null reference. On further investigation we found that if we add the DataGridView control to the main form, and then try to access its columns, it works fine!!! Code which throws error: DataGridView gv = new DataGridView(); gv.DataSource = GetDataTable(); //binding it to datatable Debug.Assert(gv.Columns == null); Code which works fine: DataGridView gv = new DataGridView(); gv.DataSource = GetDataTable(); //binding it to datatable this.Controls.Add(gv); //adding to form Debug.Assert(gv.Columns == null); //the assertion fails! Why is this behaviour so? Is there a workaround for this?

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• Right way to create [self]respawning app in python

  - by grapescan

  I am using jabber bot written in python to log some MUC talks. Sometimes it drops on some network or XMPP problems. In this case I have to start it again by myself. The goal is to make it "self-respawning". I have some variants about how to do it. Bot is one process. Another process monitors its activity and starts it if bot died. Main process spawns bot subprocess and controls it. Also I think daemonizing bot process is useful here. Platform is Linux, as you could guess. What is the right way to solve this problem?

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• How disable RequiredFieldValidator in script

  - by jlp

  I have TextBox with RequiredFieldValidator on my page. I also have link that calls some simple javascript. <asp:TextBox ID="TextBox1" runat="server" /> <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="TextBox1" Display="Dynamic" /> <asp:LinkButton ID="Link1" runat="server" OnClientClick="DoSomething(); return false;" CausesValidation="false"Text="Do" /> function DoSomething() { textbox1.val("blah"); } How to prevent RequiredFieldValidator to fire when TextBox1 is empty and it looses focus? I want RequiredFieldValidator only to fire on postback.

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• ASP.NET Error when referencing a code-behind variable

  - by mattgcon

  I have an aspx page that is supposed to reference a code-behind variable but I am receiving an error of "The name [variable] does not exist in the current context" Here is the aspx code <%@ Control Language="C#" AutoEventWireup="true" Inherits="IPAM.Website.Controls.controls_event_header" Codebehind="event_header.ascx.cs" %> <%# strEventLink %> <h3><%# strEventDate %></h3> <%# strLinks %> Here is part of the aspx.cs code declaring those variables: public string strEventLink = ""; public string strEventDate; public string strLinks = ""; Here is the part of the aspx.cs code where it sets those variables: strEventLink = "<h2>" + parent.Name + "</h2>"; strLinks += "<p><font size=\"+1\"><a href=\"" + Page.ResolveUrl("~" + strScheduleLink) + "\"><b>" + strScheduleLinkText + "</b></a></font></p>\n"; strEventDate = ei.DateSpan; Please help me with this problem

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• Tool to convert inline C# into a code behind file

  - by Jon Jones

  Hi I have a number of legacy web controls (ascx) that contains huge amounts of inline C#. The forms contain a number of repeated and duplicate code. Our first plan is to move the code into code behinds per file, then refactor etc... were doing this to upgrade the client to the latest version of their cms At the moment we are going to have to manually copy and paste from hundreds of files, create a code behind, copy the code, add the namespaces based on the client-side imports and then do any tidying up does anybody PLEASE know of a tool that can do the majority of this work for us ? Thanks

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• Help repaiting a Component

  - by serhio

  I am working with Microsoft.VisualBasic.PowerPacks.RectangleShape, but the question is common for components or controls in general. I added to a TextRectangleShape : RectangleShape a Text property: Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs) MyBase.OnPaint(e) Dim f As Font = Me.Font Dim g As Graphics = e.Graphics Dim textRect As Rectangle = New Rectangle(Me.Location, Me.Size) Using br As New SolidBrush(Me._TextColor) g.DrawString(_Text, f, br, textRect) End Using End Sub Now when I move this control the text does not disappear from the former location. Maybe I could invalidate each time the Parent in the OnPaint, but if this is not a good solution if the parent has a time consuming repaint logic or I have a lot of my custom component moving at the same time. How do I properly repaint the component?

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• Apply Alphabetical Filters on listView on Android os

  - by mudit

  Hi.. i need to create a list view that display same functionality as Contact App. I need to have a scroller through which i can traverse the list alphabetically. To achieve this i am following an example from API demos "com.example.android.apis.view.List1.java". When i implement this functionality on a static list view = it is working fine. But when i try this on a dynamic listview= it is not working. Plz help...

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• Best way to get the iframe object.

  - by Umar Siddique

  Hi, We are using too many iframes in out web application. In these iframes we load the pages which may also contains iframes and so on up to N level. Right now i'm using recursive function to find out the required iframe object in JavaScript. It works fine, The issue is when we create large dynamic pages which may contains up to 1000 iframes in it. In this case my recursive function takes too much time to find the required iframe object. How i can overcome this issue or these is any alternative of recursion in JavaScript. Thanks

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• Choosing between ExtJS and YUI based of application parameters.

  - by Kabeer

  Hello. I need help in taking call to choose between Ext JS and YUI libraries. Here are the key factors I have derived from my application requirements & development process: Complex, windows forms like controls Widgets, Layouts, Utilities Inter widget communication Easy to extend Easy to learn Intuitive & concise coding Strong exception handling Active support / community To update with upcoming technologies (HTML5, etc.) Skins & Themes to be easy to change Skins & Themes to support variety (a text box for different context to appear differently) Support & Utilities for standard protocols (XmlHttp, JSON) Good performance (responsive) Cost is not crucial, but I don't mind saving :)

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