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• How to override default window close operation ?

  - by drasto

  In WPF I want to change default close behaviour of some window, so that when user clics red close button the window does not close, it merely hides (and call some method as well). How can I do that?

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• What is simpliest C# function to parse Json String into object?

  - by Ole Jak

  What is simpliest C# function to parse Json String into object and display it (C# xaml WPF)? (for example object wit 2 arrays - arrA and arrB)

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• Binding the IsSelected property of ListBoxItem to a property on the object from it's source.

  - by BrandonS

  I have a WPF ListBox control and I'm setting it's "ItemsSource" to a collection of item objects. How can I bind the "IsSelected" property of the ListBoxItem to a "Selected" property of a corresponding item object without having an instance of the object to set as a binding.Source?

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• How do I use a DataGrid to display the contents of a MDB

  - by orangecl4now

  I'm relatively new to .Net 4 and I am creating my FIRST WPF application using a MDB as a backend datasource. I designed my UI. I have a TextField (called Name), a Combobox (called Division) and a DataGrid (called dataGrid1). The only problem I'm having is figuring out how to link my DataGrid to display data from the DataSource. and load the data in the Windows1_Loaded method. Thanks

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• How to get Node Types in a tree using C#

  - by sag

  hi all, i want to get the type of each node in a TreeView of a WPF. please help me.

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• How to dock an application in the Windows desktop?

  - by Sacha

  I would like to develop a small notifications application for Windows in .NET that docks on the right/left side of the screen (not consuming more than 300px), should always be visible and force the rest of windows to not overlap this application (something like the old Office taskbar or Vista's Sidebar). I have no idea where to start. Can it be done using XAML/WPF? Since I haven't even started coding any option is valid at this point. Thanks!

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• When I create click events for my Menu, I end up having about 20 events for each MenuItem. Is this t

  - by John McClane

  I'm using WPF Menu. I have about 20 different menu buttons and in my XAML code I associate a Click event to each menu item. Is this the preferred way?

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• What is the correct way to create a single instance application?

  - by Nidonocu

  Using C# and WPF under .net (rather than WindowsForms or console), what is the correct way to create an application that can only be run as a single instance? I know it has something to do with some mythical thing called a mutex, rarely can I find someone that bothers to stop and explain what one of these are. The code needs to also inform the already running instance that the user tried to start a second one, and maybe also pass any command line arguments if any existed.

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• How can i customized my list view horizental scrollbar appearence ?

  - by ashish semwal

  Hi all, I am using wpf listview horizentally. When i fixed the width of listview the horizental scrollbar is shown automatically. I want to change its appearence. like my listview shown on middle and both corners have scroll buttons left and right. How can i achive this please let me know its urgent....

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• Image overlay on external window

  - by user295848

  I'm writing a C# WPF application that creates a video capture of the active window. What I want to do is overlay a transparent .png file in the corner of the active window while a capture is in progress so that all the videos created by my application are watermarked. If I have the IntPntr handle of the window I am capturing and an image file - what is the best way to go about this? Thanks

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• Load Runner Connection time out

  - by user1662008

  Our performance testing team is running test on our WPF-WCF-Sql Server application and they are facing connection timeout after the load goes above 75 users Error -27796: Failed to connect to server "81.171.180.119:4567": [10060] Connection timed out I would like to know what can be steps to look at bottlenecks which may be causing issues like maybe some setting in Load Runner or identify the code bottlenecks. Thanks

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• Bank angle from up vector and look at vector?

  - by 742

  Hi all. I can't figure out the formula to compute the bank (roll) angle from the up and lookat vectors, though I feel this angle must be measured in tha plan normal to the lookat vector. Any hint appreciated. FYI I use WPF.

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• Eazfuscator.NET logging?

  - by kakopappa

  I am using Eazfuscator.NET 3.0.41 to obfuscate a (VS 2010) WPF 4 application. After obfuscating, when I double click the exe file it's throwing an error message like this. "Description: The process was terminated due to an unhandled exception. Exception Info: System.Windows.Markup.XamlParseException" Is there a way I could enable some sort of a logging to check where it's going wrong ? How can I solve this problem? please advice

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• Change layout of menu to look like a treeview

  - by Savvas Sopiadis

  Hi everybody! How is it possible to change a WPF menu control layout to look like a treeview control? Thaks in advance

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• Prism: How to render one view on top of another

  - by Nate Noonen

  We have a Prism/WPF application and are using an expander to animate a menu. When the expander expands, the content is rendered behind the main region's content. The menu is in a different region than the content it is supposed to overlay (since the menu governs what items go into that region) which is why this is occurring. We have tried setting the Z-Index of the ContentControls to no avail.

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• Time validation in TextBox. Validating a textbox for some regular expression.

  - by Rohit Kandhal

  I've to make a textbox(WPF) for entering time with validation. I want to enter a regular expression validation for time (6:12 am).

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• Does anyone know of a good .Net VoIP library.

  - by Vaelen

  I have been searching for ages now for a good .Net based VoIP library. After having tried conaito and SIP.Net I have still haven't found anything that truly fits my needs. Basically all of these are constructed using ActiveX. Unfortunately ActiveX and WPF don't play well together. And ClickOnce Deployment doesn't register Interop COM components. I need to find a good, pure .Net managed code implementation.

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• Checking for updates at startup

  - by chris

  Let's consider a WPF client-server application. What is the best practice to create the client, so that every time it is launched, it checks for updates and if any available, update the client application?

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• How to organise input for many classes

  - by Evl-ntnt

  I have one abstract class and many child classes. In child classes are from 2 to 20 members which must be filled by user. What the best way to do this using OOP? Make form for each child class? Or hide and unhide many input elements and labels? Is there some best way? I using WPF and C#

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• Way to implementing Search functinality on a Window

  - by viky

  I am working on a (WPF + C#) application. I have to implement search functionality. It will search all the occurrences of a particular string on the specific part of Window. What can be the best way to do this?

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• How to check results of LINQ to SQL query?

  - by rem

  In a WPF app I'd like to check if a return of a LINQ to SQL query contains some records, but my approach doesn't work: TdbDataContext context = new TdbDataContext(); var sh = from p in context.Items where p.Selected == true select p; if (sh == null) { MessageBox.Show("There are no Selected Items"); } Where am I wrong?

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• Best book / content for .NET 3.5

  - by Ram

  Hi, I want to study new .NET 3.5 concepts like WPF, WCF for work as well as for interviews. I am aware of .NET 2 but do not have any detailed knowledge of .NET 3.5 and newly added features in .NET 3.5 and C#. is there any good book/ online resource which would help me?

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• How to get the response headers while the user navigates from page to page?

  - by Trainee4Life

  I have a WPF webbrowser control which navigates the user to a registration site. After the user registers, a collection of headers are sent back alongwith the "finished registration" page. I have tried the Navigated event, and tried accessing WebResponse property in the event arguments but it's always null. Is there any other way to access the headers sent?

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• treeview selected item should highlight with some color

  - by ibrahimkhan

  I have a treeview in wpf. I want a different color when i select the treeviewitem. Any Suggestions Plz.. Thanks

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• Setting the scrollbar position of a ListBox

  - by Scott

  Can I programatically set the position of a WPF ListBox's scrollbar? By default, I want it to go in the center.

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