Just set the `WindowState` to `Maximized`, and the `WindowStyle` to `None`.

Set the WindowStyle to None, and the WindowState to Maximized. This can be done like this:

    WindowState = WindowState.Maximized;
    WindowStyle = WindowStyle.None;

Or in xaml:

    &lt;Window x:Class=&quot;FullScreenApplication.Window&quot;
        xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
        xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
        Title=&quot;Full Screen WPF&quot;
        WindowState=&quot;Maximized&quot;
        WindowStyle=&quot;None&quot;&gt;
And simply click ALT-TAB to escape from your full screen wpf. It allows you to switch between other applications.

 - **WindowState.Maximized**
 - **SizeToContent.Manual**

fullscreen:

    oldstate = WindowState;
    WindowState = WindowState.Maximized;
    Visibility = Visibility.Collapsed;
    WindowStyle = WindowStyle.None;
    ResizeMode = ResizeMode.NoResize;
    Visibility = Visibility.Visible;
    Activate();

going back:

    WindowState = oldstate;
    WindowStyle = WindowStyle.SingleBorderWindow;
    ResizeMode = ResizeMode.CanResize;



Before loading the collection view user sets the number of image in the array of collection view. All of the cells don&#39;t fit on the screen. I have 30 cells and only 6 on the screen.

The question: How to scroll to the cell with desired image automatically at the load of UICollectionView?

UICollectionView auto scroll to cell at IndexPath

I&#39;m trying to map &lt;kbd&gt;⌘+Delete&lt;/kbd&gt; (backspace) to delete to the beginning of the line (like it works in browsers and text editors) in **iTerm2** and I&#39;m unable to find a working escape code for it. I tried &lt;Esc&gt;1K (`^[1K`) based on what I read [in Wikipedia][1]. It just prints a &quot;K&quot;. 

Edit: I found &lt;kbd&gt;Ctrl+U&lt;/kbd&gt;. Now to find out how to map it. Maybe Hex code 21 (U being 21st letter), so 0x15? 


  [1]: http://en.wikipedia.org/wiki/ANSI_escape_code

iTerm2: delete line?

I am developing a WPF application which will be displayed in Full screen.
In addition, the application should work on many tablets of multiple dimensions.
I&#39;d like my application to run in full screen independently from its dimensions.

What is the best practice to accomplish this task?

Full screen in WPF application

<p>I am developing a WPF application which will be displayed in Full screen.
In addition, the application should work on many tablets of multiple dimensions.
I'd like my application to run in full screen independently from its dimensions.</p>
<p>What is the best practice to accomplish this task?</p>


I have seen in a Microsoft video about Visual Studio update 2 regarding these attributes. However, I can&#39;t find any other information about them and can&#39;t get a project to build with them.

Does anyone know anything about these attributes or how to get them working?

    [DataTestMethod]
    [DataRow(&quot;a&quot;, &quot;b&quot;)]
    [DataRow(&quot; &quot;, &quot;a&quot;)]
    public void TestMethod1(string value1, string value2)
    {
        Assert.AreEqual(value1 + value2, string.Concat(value1, value2));
    }

DataTestMethod and DataRow attributes in MSTEST

I need a regex pattern for finding web page links in HTML.

I first use `@&quot;(&lt;a.*?&gt;.*?&lt;/a&gt;)&quot;` to extract links (`&lt;a&gt;`), but I can&#39;t fetch `href` from that.

My strings are:

1. `&lt;a href=&quot;www.example.com/page.php?id=xxxx&amp;name=yyyy&quot; ....&gt;&lt;/a&gt;`
2. `&lt;a href=&quot;http://www.example.com/page.php?id=xxxx&amp;name=yyyy&quot; ....&gt;&lt;/a&gt;`
3. `&lt;a href=&quot;https://www.example.com/page.php?id=xxxx&amp;name=yyyy&quot; ....&gt;&lt;/a&gt;`
4. `&lt;a href=&quot;www.example.com/page.php/404&quot; ....&gt;&lt;/a&gt;`

1, 2 and 3 are valid and I need them, but number 4 is not valid for me
(`?` and `=` is essential)
_______________________________________________
Thanks everyone, but I don&#39;t need parsing `&lt;a&gt;`. I have a list of links in  `href=&quot;abcdef&quot;` format.

I need to fetch `href` of the links and filter it, my favorite urls must be contain `?` and `=` like `page.php?id=5` 

Thanks!

regular expression for finding &#39;href&#39; value of a &lt;a&gt; link

I&#39;m trying to get content of HttpResponseMessage. It should be: `{&quot;message&quot;:&quot;Action &#39;&#39; does not exist!&quot;,&quot;success&quot;:false}`, but I don&#39;t know, how to get it out of HttpResponseMessage.

    HttpClient httpClient = new HttpClient();
    HttpResponseMessage response = await httpClient.GetAsync(&quot;http://****?action=&quot;);
    txtBlock.Text = Convert.ToString(response); //wrong!

In this case txtBlock would have value:

    StatusCode: 200, ReasonPhrase: &#39;OK&#39;, Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
    {
      Vary: Accept-Encoding
      Keep-Alive: timeout=15, max=100
      Connection: Keep-Alive
      Date: Wed, 10 Apr 2013 20:46:37 GMT
      Server: Apache/2.2.16
      Server: (Debian)
      X-Powered-By: PHP/5.3.3-7+squeeze14
      Content-Length: 55
      Content-Type: text/html
    }

Getting content/message from HttpResponseMessage

I have read this [question to get first char ][1] of the string. Is there a way to get the first n number of characters from a string in C#?


  [1]: https://stackoverflow.com/q/3878820/1716774

How to get the first five character of a String

I want to see  exception detail in visual studio debugger without assigning variable to exception. Currently I have to write something like this:

    try 
    {
        //some code
    }
    catch (SecurityException ex)
    {
       //some code or ever no any code 
    }

Visual studio throws an error indicating that ex variable is never used, but i need this variable to see exception detail while debugging. 

UPDATE: I know how to suppress VS error &#39;variable is never used&#39;, problem is in seeing exception inside watch without this variable. 

---

$exception variable by @VladimirFrolov or exception helper by @MarcGravell is an answer. 

How to see exception detail in debugger without assigning variable to exception?

Im creating a Login using a `window control` to allow a user to login into a `WPF` application that I am creating. 

So far, I have created a method that checks whether the user has entered in the correct credentials for the `username` and `password` in a `textbox` on the login screen, `binding` two `properties`. 

I have achieved this by creating a `bool` method, like so;

    public bool CheckLogin()
    {
        var user = context.Users.Where(i =&gt; i.Username == this.Username).SingleOrDefault();

        if (user == null)
        {
            MessageBox.Show(&quot;Unable to Login, incorrect credentials.&quot;);
            return false;
        }
        else if (this.Username == user.Username || this.Password.ToString() == user.Password)
        {
            MessageBox.Show(&quot;Welcome &quot; + user.Username + &quot;, you have successfully logged in.&quot;);

            return true;
        }
        else
        {
            MessageBox.Show(&quot;Unable to Login, incorrect credentials.&quot;);
            return false;
        }
    }

    public ICommand ShowLoginCommand
    {
        get
        {
            if (this.showLoginCommand == null)
            {
                this.showLoginCommand = new RelayCommand(this.LoginExecute, null);
            }
            return this.showLoginCommand;
        }
    }

    private void LoginExecute()
    {
        this.CheckLogin();
    } 

I also have a `command` that I `bind` to my button within the `xaml` like so;

    &lt;Button Name=&quot;btnLogin&quot; IsDefault=&quot;True&quot; Content=&quot;Login&quot; Command=&quot;{Binding ShowLoginCommand}&quot; /&gt;

When I enter in the username and password it executes the appropriated code, whether it being right, or wrong. But how can I close this window from the ViewModel when both username and password are correct?

I have previously tried using a `dialog modal` but it didn&#39;t quite work out. Furthermore, within my app.xaml, I have done something like the following, which loads the login page first, then once true, loads the actual application.

    private void ApplicationStart(object sender, StartupEventArgs e)
    {
        Current.ShutdownMode = ShutdownMode.OnExplicitShutdown;

        var dialog = new UserView();

        if (dialog.ShowDialog() == true)
        {
            var mainWindow = new MainWindow();
            Current.ShutdownMode = ShutdownMode.OnMainWindowClose;
            Current.MainWindow = mainWindow;
            mainWindow.Show();
        }
        else
        {
            MessageBox.Show(&quot;Unable to load application.&quot;, &quot;Error&quot;, MessageBoxButton.OK);
            Current.Shutdown(-1);
        }
    }

**Question: How can I close the Login `Window control` from the ViewModel?**

Thanks in advance.

Close Window from ViewModel

I&#39;m banging my head on my desk with this binding error..  I have checked several of the postings for the `BindingExpression` path error and cannot see anything that works with my situation.


Anyway, I have a custom control called `IncrementingTextBox`.  I am trying to disable it whenever the user &#39;checks&#39; the `CheckBox` above it.

I have a binding on the `CheckBox` `IsChecked` property that is working fine and is firing when it is supposed to.  It is correctly setting the `UseSensorLength` property on the ConfigurationModel.

However, the binding on the `IncrementingTextBox` `IsEnabled` property is causing a `BindingExpression` path error and so doesn&#39;t update at all.

As a test, I tried in the code behind to enable and disable the control and it works just fine, but I can&#39;t seem to get the Binding to work on it.

Here is a snippet from my xaml:



    ...
    
    DataContext=&quot;{Binding RelativeSource={RelativeSource Self}}&quot;
    
    ...
    ...
    
    &lt;CheckBox Content=&quot;Use Sensor Length&quot; Margin=&quot;30,6,0,0&quot; 
              IsChecked=&quot;{Binding ConfigurationModel.UseSensorLength, Mode=TwoWay}&quot;/&gt;
    
    &lt;local:IncrementingTextBox x:Name=&quot;video_length_textbox&quot; Margin=&quot;0,0,0,5&quot; 
                               IsTextEnabled=&quot;False&quot; 
                               IsEnabled=&quot;{Binding ConfigurationModel.DontUseSensorLength}&quot; 
                               ValueChanged=&quot;VideoEventValueChanged&quot;/&gt;

And Here is a snippet from my ConfigurationModel:


    public bool DontUseSensorLength
    {
        get { return !UseSensorLength; }
    }
    
    public bool UseSensorLength
    {
       get { return _useSensorLength; }
       set 
       { 
          _useSensorLength = value; 
          OnPropertyChanged(&quot;UseSensorLength&quot;); 
          OnPropertyChanged(&quot;DontUseSensorLength&quot;);
       }
    }


Here is the error message I am getting in my output window when running the app:

&gt; System.Windows.Data Error: 40 : BindingExpression path error:
&gt; &#39;ConfigurationModel&#39; property not found on &#39;object&#39;
&gt; &#39;&#39;IncrementingTextBox&#39; (Name=&#39;video_length_textbox&#39;)&#39;.
&gt; BindingExpression:Path=ConfigurationModel.DontUseSensorLength;
&gt; DataItem=&#39;IncrementingTextBox&#39; (Name=&#39;video_length_textbox&#39;); target
&gt; element is &#39;IncrementingTextBox&#39; (Name=&#39;video_length_textbox&#39;); target
&gt; property is &#39;IsEnabled&#39; (type &#39;Boolean&#39;)



Remember, the &#39;UseSensorLength&#39; property binding is working fine, but the &#39;DontUseSensorLength&#39; binding is causing the above &#39;BindingExpression path error&#39;.


WPF Error 40 BindingExpression path error: property not found on &#39;object&#39;

I was working on creating some markup extensions and started to get very weird VS behaviours. I have extracted and pinpointed the issue in the separate solution. Problem is that VS can&#39;t create a CLR object in XAML. 

Here it is:

**View:**

    &lt;Window x:Class=&quot;WpfApplication4.MainWindow&quot;
            xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
            xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
            xmlns:wpfApplication4=&quot;clr-namespace:WpfApplication4&quot;&gt;
        &lt;Window.Resources&gt;
            &lt;wpfApplication4:Dog x:Key=&quot;doggy&quot; /&gt;
        &lt;/Window.Resources&gt;
        &lt;Grid /&gt;
    &lt;/Window&gt;

**Code behind:**

    using System.Windows;
    
    namespace WpfApplication4
    {
        public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();
            }
        }
    }


**Dog class:**

    namespace WpfApplication4
    {
        public class Dog
        {
    
        }
    }

**App.Xaml (no code in App.Xaml.cs):**

    &lt;Application x:Class=&quot;WpfApplication4.App&quot;
                 xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
                 xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
                 StartupUri=&quot;MainWindow.xaml&quot;&gt;
        &lt;Application.Resources&gt;
             
        &lt;/Application.Resources&gt;
    &lt;/Application&gt;

![Project settings][1]

Exception I am getting:

    Error	1	The name &quot;Dog&quot; does not exist in the namespace &quot;clr-namespace:WpfApplication4&quot;.	\\hopr1\folders$\vxk\Documents\Visual Studio 2012\Projects\WpfApplication4\MainWindow.xaml	6	9	WpfApplication4

I am able to run solution, but designer fails with &quot;Invalid Markup&quot; error
Any ideas?

**Edit**

I am running VS 2012 Update 2
The same solution work in VS 2012 Update 1

  [1]: http://i.stack.imgur.com/HyMzZ.png
  [2]: http://i.stack.imgur.com/gf6o5.png
  [3]: http://i.stack.imgur.com/W6xTg.png


The name &quot;XYZ&quot; does not exist in the namespace &quot;clr-namespace:ABC&quot;

I am currently working on my first WPF project and trying to make a `ListView` scrollable.
At first I thought this could be easily done by simply limiting the `ListView`&#39;s width and height and thus forcing a scrollbar to appear automatically whenever the content exceeds its space. This seemed fine at first but due to the handled `PreviewMouseDown` event (which enables dragging the list&#39;s items) it doesn&#39;t work after selecting an item.

**Second attempt** (using `ScrollViewer`)

    &lt;ScrollViewer&gt;
        &lt;ListView ItemsSource=&quot;{Binding FileViewModels}&quot;
                  PreviewMouseDown=&quot;ListView_MouseMove&quot;
                  Height=&quot;450&quot; Width=&quot;200&quot;/&gt;
    &lt;/ScrollViewer&gt;

Of course, this resulted in a second scrollbar whenever the list&#39;s content became larger than its max height. And dragging the bar still didn&#39;t work after selecting an item.

**Third** (quite foolish) **attempt** (disabling scrollbar duplicate)

    &lt;ScrollViewer&gt;
        &lt;ListView ItemsSource=&quot;{Binding FileViewModels}&quot;
                  PreviewMouseDown=&quot;ListView_MouseMove&quot;
                  Height=&quot;450&quot; Width=&quot;200&quot;
                  ScrollViewer.VerticalScrollBarVisibility=&quot;Disabled&quot;
                  ScrollViewer.HorizontalScrollBarVisibility=&quot;Disabled&quot;/&gt;
    &lt;/ScrollViewer&gt;

This removed the scrollbar duplicate and enabled scrolling via mouse wheel but disabled the scrollbar, so you couldn&#39;t move by clicking and dragging it.

**Fourth attempt** (constant size of the `ScrollViewer`)

    &lt;ScrollViewer Height=&quot;450&quot; Width=&quot;200&quot;&gt;
        &lt;ListView ItemsSource=&quot;{Binding FileViewModels}&quot;
                  PreviewMouseDown=&quot;ListView_MouseMove&quot;/&gt;
    &lt;/ScrollViewer&gt;

Removed the width/height constraint from the `ListView` and moved it to the `ScrollViewer`. This enables the scrollbar and removes the duplicate. Unfortunately the mouse wheel doesn&#39;t work anymore (dragging the scroll bar works fine). 

Could somebody please explain to me why the mouse wheel doesn&#39;t work anymore and how to fix this?

**Edit**
Maybe I should go back to my first solution.
    &lt;ListView ItemsSource=&quot;{Binding FileViewModels}&quot;
              PreviewMouseDown=&quot;ListView_MouseMove&quot;
              Height=&quot;450&quot; Width=&quot;200&quot;/&gt;
              
Obviously, the `ListView`&#39;s template already contains a `ScrollViewer`. The remaining problem would then be that I cannot drag the scrollbar after selecting an item because of the handled `PreviewMouseDown` event (scrolling via MouseWheel still works in that case). Should I handle the dragging of items differently (it worked fine for me, before wanting to add a scrollbar)? Or is there a way to detect if the cursor is above the scrollbar (so I could then deselect the item which enables scrolling)?
Or are there any other suggestions?

ScrollViewer mouse wheel not scrolling

After doing a few Projects using the MVVM Pattern, Im still struggling with the Role of the ViewModel:

What I did in the past:
Using the Model only as a Data Container.
Putting the Logic to manipulate the Data in the ViewModel. (Thats the Business Logic right?)
Con: Logic is not reusable.

What I&#39;m trying now:
Keeping the ViewModel as thin as possible.
Moving all Logic into the Model Layer.
Only keeping presentation Logic in the ViewModel.
Con: Makes UI Notification realy painful If Data is Changed inside the Model Layer.


So I will  give you an Example to make it more clearer:

Scenario:
Tool to Rename Files. 
Classes:
File : Representing each File;
Rule: Contains Logic how to Rename a File;

If Im following approach 1:
Creating a ViewModel for File, Rule and the View -&gt; RenamerViewModel.
Putting all Logic in the RenamerViewModel: 
Containing a List of FileViewModel and RuleViewModel and the proceeding Logic.
Easy and fast, but not reusable.

If Im following approach 2:
Creating a new Model Class -&gt; Renamer, which contains a List of File, Rule und the proceeding Logic to interate over each File and apply each Rule.
Creating a Viewmodel for File, Rule and Renamer.
Now the RenamerViewModel only contains an instance of Renamer Model, plus two ObservableCollections to wrap the File und Rule List of the Renamer.
But the whole Logic is in the Renamer Model. So if the Renamer Model is triggered to manipulate some Data by Method Calls, the ViewModel has no Clue which Data is manipulated.
Because the Model doesnt Contain any PropertyChange Notification and I will avoid that.
So the Business and Presentation Logic is seperated, but this makes it hard to notify the UI.





MVVM: ViewModel and Business Logic Connection

In a `ListView` there are `ListviewItems` where they must not change appearance when the mouse is over them or they are selected. 

I tried to accomplish that with this style and did *somewhat* succeed:

    &lt;Style x:Key=&quot;ItemContainerStyle1&quot; TargetType=&quot;ListViewItem&quot;&gt;
        &lt;Setter Property=&quot;HorizontalContentAlignment&quot; Value=&quot;Left&quot;/&gt;
        &lt;Style.Triggers&gt;
            &lt;Trigger Property=&quot;IsMouseOver&quot; Value=&quot;True&quot;&gt;
                &lt;Setter Property=&quot;Background&quot; Value=&quot;Transparent&quot; /&gt;
                &lt;Setter Property=&quot;BorderThickness&quot; Value=&quot;0&quot; /&gt;
                &lt;Setter Property=&quot;Focusable&quot; Value=&quot;False&quot; /&gt;
            &lt;/Trigger&gt;
        &lt;/Style.Triggers&gt;
    &lt;/Style&gt;

But the it raised a new issue. When the background is set to &quot;Transparent&quot; I am now able to see this hover/glossy effect that is shown at the picture below, when the mouse is over a list view item.

![enter image description here][1]

I have tried to solve the problem with this attempt, but with no luck.

    &lt;Style TargetType=&quot;{x:Type ListViewItem}&quot;&gt;
        &lt;Style.Resources&gt;
          &lt;SolidColorBrush x:Key=&quot;{x:Static SystemColors.HighlightBrushKey}&quot; Color=&quot;#00000000&quot;/&gt;
          &lt;SolidColorBrush x:Key=&quot;{x:Static SystemColors.ControlBrushKey}&quot; Color=&quot;#00000000&quot;/&gt;
        &lt;/Style.Resources&gt;
    &lt;/Style&gt;

Anyone have an idea how to remove this hover effect?


  [1]: http://i.stack.imgur.com/CGof0.png

Remove Highlight Effect from ListViewItem

In **WPF validation**, whats the difference between the following:

&gt; ValidatesOnNotifyDataErrors = True
&gt;
&gt; ValidatesOnDataErrors = True
&gt;
&gt; NotifyOnValidationError = True

When should you use these properties correctly in XAML?

What is the difference between ValidatesOnNotifyDataErrors and ValidatesOnDataErrors and NotifyOnValidationError in WPF validation?

I am very new to Front-end development and Foundation.

I am trying to get `&lt;div class=&quot;main-header&quot;&gt;` to be a full screen image that scales down responsively. 

Can anyone tell me what I am doing wrong? It is scaling properly, but is not showing the full image. I also wanted the `&lt;div class=&quot;large-6 large-offset-6 columns&quot;&gt;` to sit above it on a mobile device – is that possible?

The HTML: 

    &lt;!-- MAIN HEADER --&gt;
    &lt;div class=&quot;main-header&quot;&gt;
       &lt;div class=&quot;row&quot;&gt;
         &lt;div class=&quot;large-6 large-offset-6 columns&quot;&gt;
           &lt;h1 class=&quot;logo&quot;&gt;BleepBleeps&lt;/h1&gt;
           &lt;h3&gt;A family of little friends&lt;br&gt;that make parenting easier&lt;/h3&gt;
         &lt;/div&gt; &lt;!-- END large-6 large-offset-6 columns --&gt;
       &lt;/div&gt;&lt;!-- END ROW --&gt;
    &lt;/div&gt;&lt;!-- END MAIN-HEADER --&gt;

The CSS:

    .main-header {
        background-image: url(../img/bb-background2.png);
        background-repeat: no-repeat;
        background-position: center;
        background-size: cover;
        width: 100%;
        height: 100%;
    }

    h1.logo {
        text-indent: -9999px;
        height:115px;
        margin-top: 10%;
    }

Full-screen responsive background image

I have a video, and I want it to FILL 100% of the width, and 100% of the height. And keep the aspect ratio.

Is it possible that it at least fills 100% for both? And if a bit of the video has to be out of the screen to keep the aspect ratio, that doesn&#39;t matter.


HTML:

        &lt;video preload=&quot;auto&quot; class=&quot;videot&quot; id=&quot;videot&quot; height=&quot;100%&quot; preload&gt;
        &lt;source src=&quot;BESTANDEN/video/tible.mp4&quot; type=&quot;video/mp4&quot; &gt;
        &lt;object data=&quot;BESTANDEN/video/tible.mp4&quot; height=&quot;1080&quot;&gt;
            &lt;param name=&quot;wmode&quot; value=&quot;transparent&quot;&gt;
            &lt;param name=&quot;autoplay&quot; value=&quot;false&quot; &gt;
            &lt;param name=&quot;loop&quot; value=&quot;false&quot; &gt;
        &lt;/object&gt;
CSS:

     .videof, .videot {
	    width: 100%    !important;
        height: 100%   !important;
     }

Video 100% width and height

I want to hide navigation bar permanently in my activity(not whole system ui).
now i&#39;m using this piece of code   

    getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);


It hides the bar but when user touches the screen it showing again. is there  any way to hide it permanently until activity `onStop()`;

Content Type	Original Author	Original Content on Stackoverflow
Question	Lamloumi Afif	View Question on Stackoverflow
Solution 1 - C#	Thomas Levesque	View Answer on Stackoverflow
Solution 2 - C#	Kurt Van den Branden	View Answer on Stackoverflow
Solution 3 - C#	el_yonousi	View Answer on Stackoverflow
Solution 4 - C#	altair	View Answer on Stackoverflow

Full screen in WPF application

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

iTerm2: delete line?

UICollectionView auto scroll to cell at IndexPath

Attributions