    test.Margin = new Thickness(0, -5, 0, 0);

[Alignment, Margins and Padding Overview (MSDN)][1]&lt;br /&gt;
[FrameworkElement.Margin (MSDN)][2]

  [1]: http://msdn.microsoft.com/en-us/library/ms751709.aspx
  [2]: http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.margin.aspx

    test.Margin = new Thickness(0, 0, 0, 0);

You can access the control from code behind using the Name property.
In this case, `test.Margin` property can be used to change it dynamically.

Margin is set as thickness, so the solution could be:

    test.Margin = new Thickness(0,-5,0,0);

*Note: Thickness have 4 parameters `viz left, top, right and bottom`. In above solution, we have just changed `top margin`, rest remained unchanged.*

I want temporarily disable websocket in Google Chrome to debug a javascript to make sure it work for any browser without websocket support. 

How can i temporarily disable websocket in Google Chrome?

Alright, so I&#39;m currently working on parsing an RSS feed. I&#39;ve gotten the data I need no problem, and all I have left is parsing the game title.

Here is the code I currently have (ignore the sloppiness, it is just a proof of concept):

    &lt;?php
    $url = &#39;http://raptr.com/conexion/rss&#39;;
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
    $result = curl_exec($ch); 
    curl_close($ch);
    
    $xml = new SimpleXMLElement($result);
    
    $lastgame = $xml-&gt;channel-&gt;item[0]-&gt;description;
    preg_match(&#39;[a-zA-Z]+&lt;/a&gt;.$&#39;, $lastgame, $match);
    
    echo $match;
    ?&gt;

Everything was working great, but then I started getting this error:

    Warning: preg_match() [function.preg-match]: 
    Unknown modifier &#39;+&#39; in raptr.php on line 14

The only thing I have left is to strip out the closing anchor tag and the period, but I can&#39;t seem to figure out why it isn&#39;t liking the &#39;+&#39;. Any ideas?

Edit: This should not be marked as a duplicate as it was asked two years before the other question.

preg_match(); - Unknown modifier &#39;+&#39;

For this xaml:

    &lt;WebBrowser Name=&quot;test&quot; Margin=&quot;0,0,0,0&quot; /&gt;

How can I change the web browser control margin on top to be -5 programmatically in C#?


Change margin programmatically in WPF / C#

For this xaml:
<pre><code class="hljs language-ini">&#x3C;WebBrowser Name="test" Margin="0,0,0,0" />
</code></pre>
How can I change the web browser control margin on top to be -5 programmatically in C#?

I have a label on my form which is on the right of the form. This label loads a dynamic text.

Sometimes the text that it loads is too long and the text crosses the border of the form, that is some of the text is out of the form.

I want to make the label to grow from right to left instead of left to right. How do I achieve this?


Label grow from right to left

Is there a linq lambda search method that returns null, instead of throwing an exception, when searching a list?

My current solution is something like: (to avoid exception from being thrown)

    if (list.Exists(x =&gt; x.Foo == Foo))
    {
        var listItem = list.Find(x =&gt; x.Foo == Foo);
    }

It just feels wrong to repeat the expression.

Something like ...

    var listItem = list.Find(x =&gt; x.Foo == Foo);
    if (listItem != null)
    {
        //Do stuff
    }

... feels better to me. Or is it just me?

Do you have a better approach on this one? (The solution don&#39;t have to be returning null, just a better solution is good)

Find() and First() throws exceptions, how to return null instead?

I want to round up always in c#, so for example, from 6.88 to 7, from 1.02 to 2, etc.

How can I do that?

How to round up in c#

I really like this question:

https://stackoverflow.com/questions/1018610/simplest-way-to-do-a-fire-and-forget-method-in-c

I just want to know that now that we have Parallel extensions in C# 4.0 is there a better cleaner way to do Fire &amp; Forget with Parallel linq?

Simplest way to do a fire and forget method in c# 4.0

I&#39;m pretty confused with how to mix razor and js. This is the current function I am stuck with:


    &lt;script type=&quot;text/javascript&quot;&gt;
    
            var data = [];
    
            @foreach (var r in Model.rows)
            {
                    data.push([ @r.UnixTime * 1000, @r.Value ]);
            }

If I could declare c# code with `&lt;c#&gt;&lt;/c#&gt;` and everything else was JS code -- this would be what I am after:


    &lt;script type=&quot;text/javascript&quot;&gt;
    
            var data = [];
    
            &lt;c#&gt;@foreach (var r in Model.rows) {&lt;/c#&gt;
                    data.push([ &lt;c#&gt;@r.UnixTime&lt;/c#&gt; * 1000, &lt;c#&gt;@r.Value&lt;/c#&gt; ]);
            &lt;c#&gt;}&lt;/c#&gt;

What is the best method to achieve this?

Mix Razor and Javascript code

I have a requirement in WPF/C# to click on a button, gather some data and then put it in a text file that the user can download to their machine. I can get the first half of this, but how do you prompt a user with a &quot;Save As&quot; dialog box? The file itself will be a simple text file.

How do I show a Save As dialog in WPF?

How do I convert a `Color` to a `Brush` in C#?

convert from Color to brush

Basically I have in my MainViewModel.cs:

    ObservableCollection&lt;TabItem&gt; MyTabs { get; private set; }

However, I need to somehow be able to not only create the tabs, but have the tabs content be loaded and linked to their appropriate viewmodels while maintaining MVVM.

Basically, how can I get a usercontrol to be loaded as the content of a tabitem AND have that usercontrol wired up to an appropriate viewmodel. The part that makes this difficult is the ViewModel is not supposed to construct the actual view items, right? Or can it?

Basically, would this be MVVM appropriate:

    UserControl address = new AddressControl();
    NotificationObject vm = new AddressViewModel();
    address.DataContext = vm;
    MyTabs[0] = new TabItem()
    {
        Content = address;
    }

I only ask because well, i&#39;m constructing a View (AddressControl) from within a ViewModel, which to me sounds like a MVVM no-no.

How do I bind a TabControl to a collection of ViewModels?

I need to drop an image file into my WPF application. I currently have a event firing when I drop the files in, but I don&#39;t know how what to do next. How do I get the Image? Is the `sender` object the image or the control?

    private void ImagePanel_Drop(object sender, DragEventArgs e)
    {
        //what next, dont know how to get the image object, can I get the file path here?
    }





Drag and drop files into WPF

I have got a combo box with items source attached using simple binding. Is there any way to refresh this binding once combo box is loaded?

How to force a WPF binding to refresh?

I have created a class Person that looks like this: 

    public class Person
    {
        public enum GenderType
        {
            Female, 
            Male
        }

        public string Name
        {
            get; set;
        }

        public GenderType? Gender
        {
            get; set;
        }
    }

Next, I created data template that is going to present objects of type Person.  
Here&#39;s XAML code: 

    &lt;DataTemplate 
        x:Key=&quot;personTemplate&quot; 
        DataType=&quot;{x:Type model:Person}&quot;&gt;
      &lt;StackPanel&gt;
        &lt;RadioButton 
            Content=&quot;Female&quot; 
            IsChecked=&quot;{Binding Path=Gender, 
                        Converter={StaticResource genderConverter}, 
                        ConverterParameter=???}&quot;/&gt;
        &lt;RadioButton 
            Content=&quot;Male&quot; 
            IsChecked=&quot;{Binding Path=Gender, 
                        Converter={StaticResource genderConverter}, 
                        ConverterParameter=???}&quot;/&gt;
        &lt;RadioButton 
            Content=&quot;Not specified&quot; 
            IsChecked=&quot;{Binding Path=Gender, 
                        Converter={StaticResource genderConverter}, 
                        ConverterParameter=???}&quot;/&gt;
      &lt;/StackPanel&gt;
    &lt;/DataTemplate&gt;

Of course the `???`s in the code won&#39;t work :) The problem is that I want to create a `genderConverter` converter which will compare the given value, i.e. `personObject.Gender`, against the given `Person.GenderType` value provided in the parameter and return `true` if the values match. 

I don&#39;t know how to make the converter parameter pass `Person.GenderType.Female`, `Person.GenderType.Male` and `null`, for the first, second and third radio button, respectively.

 How to pass specific value to the converter parameter?

Architecturally, I think WPF is pretty amazing. In general, I&#39;m a big fan of the underlying rendering/animation inner workings. The flexibility of the templating and styling set up is pretty impressive.

But I loathe XAML - I feel like it complicates many things. I&#39;ve used it on large and small applications and I&#39;ve found myself many times trying to figure out how to do something in XAML for which the underlying principle is basic but the syntax is quirky. Not only that, but I&#39;ve wondered many times how heavy certain parts of the parsing/binding are. (I know it&#39;s compiled, but I&#39;m not sure how much is still evaluated at runtime)

XAML is just one way of building and loading the visual tree. Are there any frameworks for simplifying building the visual tree in a non-XML, code-based (but still largely declarative) way? Specifically, I&#39;m interested in frameworks that mitigate any of the following issues while retaining an MVVM approach:

1. Strongly typed binding. Specify that the ViewModel must conform to a specific type. I assume BaseBinding uses reflection under the hood and I&#39;m a bit skeptical as to the speed of that, not to mention broken bindings being annoying.  

2. Faster binding, non-`INotifyPropertyChanged` binding. It seems like some sort of `BindableProperty&lt;T&gt;` could be created and the binding could listen directly to that rather than receiving all ViewModel property changes. And the use of a direct callback versus a string argument would also seem to be advantageous.  

3. A different approach to resource management; again, strongly typed dictionaries of some sort could be pretty nice. I&#39;d almost like to see styles as lambdas or something to capture the strongly typed aspect.

In summary, any frameworks that are non-XAML based, fit well with MVVM, and are strongly typed?



WPF without XAML

Is there any way to combine mutliple styles in XAML to make a new style that has all of the desired settings?

For example (pseudo code);

    &lt;Style x:key=&quot;A&quot;&gt;
     ...
    &lt;/Style&gt;
    
    &lt;Style x:key=&quot;B&quot;&gt;
     ...
    &lt;/Style&gt;
    
    &lt;Style x:key=&quot;Combined&quot;&gt;
     &lt;IncludeStyle Name=&quot;A&quot;/&gt;
     &lt;IncludeStyle Name=&quot;B&quot;/&gt;
     ... other properties.
    &lt;/Style&gt;
I know that there is a `BasedOn` property for styles, but that feature will only take you so far.  I am really just looking for an easy way (in XAML) to create these &#39;combined&#39; styles.  But like I said before, I doubt it exists, unless anyone has heard of such a thing??


XAML Combine styles going beyond BasedOn?

I try to use binding with an attached property. But can&#39;t get it working.

    public class Attached
    {
        public static DependencyProperty TestProperty =
            DependencyProperty.RegisterAttached(&quot;TestProperty&quot;, typeof(bool), typeof(Attached),
            new FrameworkPropertyMetadata(false, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault | FrameworkPropertyMetadataOptions.Inherits));

        public static bool GetTest(DependencyObject obj)
        {
            return (bool)obj.GetValue(TestProperty);
        }

        public static void SetTest(DependencyObject obj, bool value)
        {
            obj.SetValue(TestProperty, value);
        }
    }

The XAML Code:

    &lt;Window ...&gt;
        &lt;StackPanel local:Attached.Test=&quot;true&quot; x:Name=&quot;f&quot;&gt;
            &lt;CheckBox local:Attached.Test=&quot;true&quot; IsChecked=&quot;{Binding (local:Attached.Test), Mode=TwoWay, RelativeSource={RelativeSource Self}}&quot; /&gt;
            &lt;CheckBox local:Attached.Test=&quot;true&quot; IsChecked=&quot;{Binding (local:Attached.Test), Mode=TwoWay}&quot; /&gt;
        &lt;/StackPanel&gt;
    &lt;/Window&gt;


And the Binding Error:

    System.Windows.Data Error: 40 : BindingExpression path error: &#39;(local:Attached.Test)&#39; property not found on &#39;object&#39; &#39;&#39;StackPanel&#39; (Name=&#39;f&#39;)&#39;. BindingExpression:Path=(local:Attached.Test); DataItem=&#39;StackPanel&#39; (Name=&#39;f&#39;); target element is &#39;CheckBox&#39; (Name=&#39;&#39;); target property is &#39;IsChecked&#39; (type &#39;Nullable`1&#39;)


WPF Attached Property Data Binding

The assembly qualified string used as a parameter below for a Uri works in XAML, but gives me the error shown when used in code. 

I tried every kind of UriKind with the same result. How can I fix this?

&lt;!-- language: c# --&gt;

    [Test]
    public void LargeImageSource_IsKnown()
    {
	var uri = new Uri(
            &quot;pack://application:,,,/&quot; + 
            &quot;MyAssembly.Core.Presentation.Wpf;component/&quot; + 
            &quot;Images/Delete.png&quot;, UriKind.RelativeOrAbsolute);

	Assert.That(
            _pickerActivityCollectionVm.DeleteActivityCommand.LargeImageSource,
            Is.EqualTo(uri));
    }

    System.UriFormatException : Invalid URI: Invalid port specified.
	at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
	at System.Uri..ctor(String uriString, UriKind uriKind)
	

UPDATE
=======

Based on Thomas&#39; superb answer and my own comments about readability, I wound up using the following in my BaseTestFixture class. Hope this helps someone else.

&lt;!-- language: c# --&gt;

        protected virtual void OnFixtureSetUp() {
            // logging, other one time setup stuff...

            const string scheme = &quot;pack&quot;;
            if (!UriParser.IsKnownScheme(scheme)) {
                Assert.That(PackUriHelper.UriSchemePack, Is.EqualTo(scheme));
            }
        }


Content Type	Original Author	Original Content on Stackoverflow
Question	yozawiratama	View Question on Stackoverflow
Solution 1 - C#	Eben Geer	View Answer on Stackoverflow
Solution 2 - C#	Andrey	View Answer on Stackoverflow
Solution 3 - C#	Kent Boogaart	View Answer on Stackoverflow
Solution 4 - C#	Shweta Goyal	View Answer on Stackoverflow

Change margin programmatically in WPF / C#

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

preg_match(); - Unknown modifier '+'

How can i temporarily disable websocket in Google Chrome?

Attributions