Perhaps [this link][1] will help you.

&gt; At times, you may want to
&gt; programmatically set the Height or
&gt; Width of a WPF element to Auto in
&gt; code. To do this, just use the
&gt; Double.NaN (Not a Number) value.
&gt; 
&gt; For example, in C#:
&gt;
&gt; this.txtName.Width = Double.NaN;


  [1]: http://msmvps.com/blogs/kevinmcneish/archive/2010/03/03/wpf-setting-the-height-or-width-to-auto-in-code.aspx

You can use  
&lt;pre&gt;
RowDefinition rd = new RowDefinition();  
rd.Height = GridLength.Auto;  
ContentGrid.RowDefinitions.Add(rd);
&lt;/pre&gt;

While the question has been answered with the code-behind (as asked), here is the same solution in XAML for basic control properties who don&#39;t have `&quot;auto&quot;`:

    xmlns:sys=&quot;clr-namespace:System;assembly=mscorlib&quot;

    Height=&quot;{x:Static sys:Double.NaN}&quot;

Posting because google took me here when searching for XAML solution for a `TextBox` (auto doesn&#39;t exist).

For instance, if I wanted to a find and replace with strings containing backward or forward slashes, how would this be accomplished in vim? Thank you!

Examples
Find &amp; Replace is: `:%s/foo/bar/g`

what if I wanted to find all occurrences of `&lt;dog/&gt;` and replace it with `&lt;cat\&gt;`



How does one escape backslashes and forward slashes in VIM find/search?

I have an ArrayList that I want to use to hold RaceCar objects that extend the Thread class as soon as they are finished executing. A class, called Race, handles this ArrayList using a callback method that the RaceCar object calls when it is finished executing. The callback method, addFinisher(RaceCar finisher), adds the RaceCar object to the ArrayList. This is supposed to give the order in which the Threads finish executing.

I know that ArrayList isn&#39;t synchronized and thus isn&#39;t thread-safe. I tried using the Collections.synchronizedCollection(c Collection) method by passing in a new ArrayList and assigning the returned Collection to an ArrayList. However, this gives me a compiler error:

    Race.java:41: incompatible types
    found   : java.util.Collection
    required: java.util.ArrayList
    finishingOrder = Collections.synchronizedCollection(new ArrayList(numberOfRaceCars));

Here is the relevant code:

    public class Race implements RaceListener {
        private Thread[] racers;
        private ArrayList finishingOrder;
        
        //Make an ArrayList to hold RaceCar objects to determine winners
        finishingOrder = Collections.synchronizedCollection(new ArrayList(numberOfRaceCars));
        		
        //Fill array with RaceCar objects
        for(int i=0; i&lt;numberOfRaceCars; i++) {
	    racers[i] = new RaceCar(laps, inputs[i]);
		
            //Add this as a RaceListener to each RaceCar
            ((RaceCar) racers[i]).addRaceListener(this);
        }

        //Implement the one method in the RaceListener interface
        public void addFinisher(RaceCar finisher) {
            finishingOrder.add(finisher);
        }

What I need to know is, am I using a correct approach and if not, what should I use to make my code thread-safe? Thanks for the help!

How do I make my ArrayList Thread-Safe? Another approach to problem in Java?

How could I set the value of the `Height` property of a WPF control in C# code to &quot;`Auto`&quot;?

    &lt;Grid.RowDefinitions&gt;
        &lt;RowDefinition /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; /&gt;
        &lt;RowDefinition /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; /&gt;
        &lt;RowDefinition /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; /&gt;
        &lt;RowDefinition /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; /&gt;
        &lt;RowDefinition /&gt;
    &lt;/Grid.RowDefinitions&gt;

I want to reproduce this behavior in the code behind. Any ideas?

WPF Auto height in code

How could I set the value of the <code>Height</code> property of a WPF control in C# code to "<code>Auto</code>"?
<pre><code class="hljs language-php-template">&#x3C;Grid.RowDefinitions>
 &#x3C;RowDefinition />
 &#x3C;RowDefinition Height="Auto" />
 &#x3C;RowDefinition />
 &#x3C;RowDefinition Height="Auto" />
 &#x3C;RowDefinition />
 &#x3C;RowDefinition Height="Auto" />
 &#x3C;RowDefinition />
 &#x3C;RowDefinition Height="Auto" />
 &#x3C;RowDefinition />
&#x3C;/Grid.RowDefinitions>
</code></pre>
I want to reproduce this behavior in the code behind. Any ideas?

I have attempted to implement a producer/consumer pattern in c#.  I have a consumer thread that monitors a shared queue, and a producer thread that places items onto the shared queue.  The producer thread is subscribed to receive data...that is, it has an event handler, and just sits around and waits for an OnData event to fire (the data is being sent from a 3rd party api).  When it gets the data, it sticks it on the queue so the consumer can handle it. 

When the OnData event does fire in the producer, I had expected it to be handled by my producer thread.  But that doesn&#39;t seem to be what is happening.  The OnData event seems as if it&#39;s being handled on a new thread instead!  Is this how .net always works...events are handled on their own thread?  Can I control what thread will handle events when they&#39;re raised?  What if hundreds of events are raised near-simultaneously...would each have its own thread?


In .NET, what thread will Events be handled in?

```
public object MethodName(ref float y)
{
    // elided
}
```

How do I define a `Func` delegate for this method?

Func delegate with ref variable

I currently have a page which is declared as follows:

    public partial class MyPage : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            //snip
            MyButton.Click += (o, i) =&gt;
            {
                //snip
            }
        }
    }

I&#39;ve only recently moved to .NET 3.5 from 1.1, so I&#39;m used to writing event handlers outside of the Page_Load. My question is; are there any performance drawbacks or pitfalls I should watch out for when using the lambda method for this? I prefer it, as it&#39;s certainly more concise, but I do not want to sacrifice performance to use it. Thanks.

Using lambda expressions for event handlers

In a C# application, how can I find out if a WPF window is in the primary monitor or another monitor?

How do I know what monitor a WPF window is in

Given a datasource like that:

    var c = new Car[]
    {
      new Car{ Color=&quot;Blue&quot;, Price=28000},
      new Car{ Color=&quot;Red&quot;, Price=54000},
      new Car{ Color=&quot;Pink&quot;, Price=9999},
      // ..
    };

How can I find the **index** of the first car satisfying a certain condition with LINQ?

EDIT:

I could think of something like this but it looks horrible:

    int firstItem = someItems.Select((item, index) =&gt; new    
    {    
        ItemName = item.Color,    
        Position = index    
    }).Where(i =&gt; i.ItemName == &quot;purple&quot;)    
      .First()    
      .Position;

Will it be the best to solve this with a plain old loop?


How to get index using LINQ?

I have a control with two properties. One is a `DependencyProperty`, the other is an &quot;alias&quot; to the first one.  How do I raise the `PropertyChanged` event for the second one (the alias) when the first one is changed.

**NOTE**: I&#39;m using `DependencyObjects`, not `INotifyPropertyChanged` (tried that, didn&#39;t work because my control is a `ListVie` sub-classed)

Something like this.....

    protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)
    {
        base.OnPropertyChanged(e);
        if (e.Property == MyFirstProperty)
        {
            RaiseAnEvent( MySecondProperty ); /// what is the code that would go here?
        }    
    }


If I were using an INotify I could do like this...

    public string SecondProperty
    {
        get
    	{
    	    return this.m_IconPath;
    	}
    }
    
    public string IconPath
    {
    	get
    	{
    	    return this.m_IconPath;
    	}
    	set
    	{
    	    if (this.m_IconPath != value)
    	    {
    	        this.m_IconPath = value;
    		this.SendPropertyChanged(&quot;IconPath&quot;);
    		this.SendPropertyChanged(&quot;SecondProperty&quot;);
    	    }
    	}
    }

Where can I raise `PropertyChanged` events on multiple properties from one setter?  I need to be able to do the same thing, only using `DependencyProperties`.

How To Raise Property Changed events on a Dependency Property?

When looking at sample attached properties and behaviors, I&#39;ve seen a mishmash of uses of ` FrameworkPropertyMetadata`, `UIPropertyMetadata` and `PropertyMetadata`. Since they all form an inheritance hierarchy, how do I choose which one to use?


When should I use FrameworkPropertyMetadata or UIPropertyMetadata over plain PropertyMetadata?

How can I disable selecting in a WPFTooklit&#39;s `DataGrid`?
I tried modifying the solution that works for `ListView` (from https://stackoverflow.com/questions/1051215/wpf-listview-turn-off-selection#comment-863179), but that doesn&#39;t work:

	&lt;tk:DataGrid&gt;
		&lt;tk:DataGrid.ItemContainerStyle&gt;
			&lt;Style TargetType=&quot;{x:Type tk:DataGridRow}&quot;&gt;
				&lt;Setter Property=&quot;Focusable&quot; Value=&quot;false&quot;/&gt;
			&lt;/Style&gt;
		&lt;/tk:DataGrid.ItemContainerStyle&gt;
		&lt;tk:DataGrid.CellStyle&gt;
			&lt;Style TargetType=&quot;{x:Type tk:DataGridCell}&quot;&gt;
				&lt;Setter Property=&quot;Focusable&quot; Value=&quot;false&quot;/&gt;
			&lt;/Style&gt;
		&lt;/tk:DataGrid.CellStyle&gt;
	&lt;/tk:DataGrid&gt;

Disable selecting in WPF DataGrid

I have a simple WPF form with a `Grid` declared on the form. This `Grid` has a bunch of rows:

    &lt;Grid.RowDefinitions&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; MinHeight=&quot;30&quot; /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; Name=&quot;rowToHide&quot; /&gt;
        &lt;RowDefinition Height=&quot;Auto&quot; MinHeight=&quot;30&quot; /&gt;
    &lt;/Grid.RowDefinitions&gt;

The row named `rowToHide` contains a few input fields and I want to hide this row after I detect I don&#39;t need these fields. It&#39;s simple enough to just set `Visibility = Hidden` to all items in the row, but the row still takes up space in the `Grid`. I tried setting `Height = 0` to the items, but that didn&#39;t seem to work.

You can think of it like this: You have a form, in there you have a drop down saying &quot;Payment Type&quot;, and if the person selects &quot;Cash&quot;, you want to hide the row containing the Card details. It isn&#39;t an option to start the form with this hidden already.

Hide grid row in WPF

In my particular case, I want to bind to the IsReadOnly property of a TextBox to set the Content property of a Button? They are both part of the same StackPanel.

I&#39;ve tried doing it with a DataTrigger with a Binding to the ElementName of the TextBox and a Trigger using the TextBox name as the SourceName.

Any thoughts?

How do I bind to another control&#39;s property from a trigger?

I&#39;ve got a situation in which I need to show an integer value, bound to a property on my data context, after putting it through two separate conversions:

1. Reverse the value within a range (e.g. range is 1 to 100; value in datacontext is 90; user sees value of 10)
1. convert the number to a string

I realise I could do both steps by creating my own converter (that implements IValueConverter). However, I&#39;ve already got a separate value converter that does just the first step, and the second step is covered by Int32Converter.

Is there a way I can chain these two existing classes *in XAML* without having to create a further class that aggregates them?

If I need to clarify any of this, please let me know. :)

Thanks.

Is there a way to chain multiple value converters in XAML?

I need to create a Dialog / Prompt including TextBox for user input. My problem is, how to get the text after having confirmed the dialog? Usually I would make a class for this which would save the text in a property. However I want do design the Dialog using XAML. So I would somehow have to extent the XAML Code to save the content of the TextBox in a property - but I guess that&#39;s not possible with pure XAML. What would be the best way to realize what I&#39;d like to do? How to build a dialog which can be defined from XAML but can still somehow return the input? Thanks for any hint!

WPF: Create a dialog / prompt

I actually don&#39;t like #region in my code. *BUT* for some reason call me crazy, I would like to have them in my XAML. I would like whole sections to have a #region-like thing and collapse them (e.g. my &amp;lt;Window.CommandBindings&gt;, &amp;lt;Grid.*Definitions&gt;, &amp;lt;Menu&gt;, &amp;lt;Toolbar&gt;, etc..

Does this exist? If not, how about &amp;lt;RegionCollapse&gt;

#region in XAML

Is it possible to add some value from resource file right into the XAML markup? Or for localization we always have to make something like this in *.cs file:

    txtMessage.Text = Messages.WarningUserMessage;

Where `Messages` is resource, and `txtMessage` is TextBlock.

Content Type	Original Author	Original Content on Stackoverflow
Question	Karim Agha	View Question on Stackoverflow
Solution 1 - C#	Zach Johnson	View Answer on Stackoverflow
Solution 2 - C#	Nimrod Shory	View Answer on Stackoverflow
Solution 3 - C#	Edgaras	View Answer on Stackoverflow

WPF Auto height in code

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

How do I make my ArrayList Thread-Safe? Another approach to problem in Java?

How does one escape backslashes and forward slashes in VIM find/search?

Attributions