use the [HorizontalContentAlignment][1] property. 

**Sample**

    &lt;Label HorizontalContentAlignment=&quot;Center&quot;/&gt;


  [1]: http://msdn.microsoft.com/en-us/library/system.windows.controls.control.horizontalcontentalignment.aspx

The Control class has HorizontalContentAlignment  and VerticalContentAlignment  properties. These properties determine how a control’s content fills the space within the control.  
Set HorizontalContentAlignment and VerticalContentAlignment to Center.

You have to use HorizontalContentAlignment=&quot;Center&quot; and!  Width=&quot;Auto&quot;.

Sample:

    Label label = new Label();
    label.HorizontalContentAlignment = HorizontalAlignment.Center;

In my preferences.xml I have a preference element like this:

    &lt;Preference android:title=&quot;About&quot; /&gt;

I want to assign `onClick` event, so if user would click on it, I would be able to do open new `Intent` or browser. I tried to do it like I do with buttons, but this not seem to work.

Android preferences onclick event

I currently use the following code to print a double:

    return String.format(&quot;%.2f&quot;, someDouble);

This works well, except that Java uses my Locale&#39;s decimal separator (a comma) while I would like to use a point. Is there an easy way to do this?

Force point (&quot;.&quot;) as decimal separator in java

How to center a label text in WPF?

&lt;pre&gt;
&lt;code&gt;
Label HorizontalAlignment=&quot;Center&quot; Content=&quot;What?&quot; FontSize=&quot;25&quot; FontWeight=&quot;Bold&quot; Canvas.Top=&quot;5&quot;
&lt;/code&gt;
&lt;/pre&gt;

How to center a label text in WPF?

How to center a label text in WPF?
<pre><code class="hljs language-ini">
Label HorizontalAlignment="Center" Content="What?" FontSize="25" FontWeight="Bold" Canvas.Top="5"

</code>
</pre>

Hey I keep getting an error:

&gt; Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

My code:

    OdbcCommand cmd = new OdbcCommand(&quot;SELECT FirstName, SecondName, Aboutme FROM User WHERE UserID=1&quot;, cn);
    
    OdbcDataReader reader = cmd.ExecuteReader();
    while (reader.Read())
    {
        Name.Text = String.Format(&quot;{0} {1}&quot;, reader.GetString(0), reader.GetString(1));
        Aboutme.Text = String.Format(&quot;{2}&quot;, reader.GetString(0));
    }



Index (zero based) must be greater than or equal to zero

I am learning about &lt;a href=&quot;http://en.wikipedia.org/wiki/Progressive_enhancement&quot;&gt;Progressive Enhancement&lt;/a&gt; and I have a question about AJAXifying views. In my MVC 3 project I have a layout page, a viewstart page, and two plain views.

The viewstart page is in the root of the Views folder and thus applies to all views. It specifies that all views should use `_Layout.cshtml` for their layout page. The layout page contains two navigation links, one for each view. The links use `@Html.ActionLink()` to render themselves to the page.

Now I have added jQuery and want to hijack these links and use Ajax to load their content on the page dynamically.

    &lt;script type=&quot;text/javascript&quot;&gt;
        $(function () {
            $(&#39;#theLink&#39;).click(function () {
                $.ajax({
                    url: $(this).attr(&#39;href&#39;),
                    type: &quot;GET&quot;,
                    success: function (response) {
                        $(&#39;#mainContent&#39;).html(response);
                    }
                });
                return false;
            });
        });
    &lt;/script&gt;

There are two ways I can think of to do this, but I don&#39;t particularly like either one:

1) I can take the entire View&#39;s contents and place them in a partial view, then have the main view call the partial view when it is rendered. That way, using `Request.IsAjaxRequest()` in the controller, I can return `View()` or return `PartialView()` based on whether or not the request is an Ajax request. I can&#39;t return the regular view to the Ajax request because then it would use the layout page and I&#39;d get a second copy of the layout page injected. However, I don&#39;t like this because it forces me to create empty views with just a `@{Html.RenderPartial();}` in them for the standard GET requests.

        public ActionResult Index()
        {
            if (Request.IsAjaxRequest())
                return PartialView(&quot;partialView&quot;);
            else
                return View();
        }

Then in Index.cshtml do this:

    @{Html.RenderPartial(&quot;partialView&quot;);}

2) I can remove the layout designation from _viewstart and specify it manually when the request is NOT Ajax:

        public ActionResult Index()
        {
            if (Request.IsAjaxRequest())
                return View(); // Return view with no master.
            else
                return View(&quot;Index&quot;, &quot;_Layout&quot;); // Return view with master.
        }

Does anyone have a better suggestion? Is there a way to return a view without its layout page? It would be much easier to explicitly say &quot;don&#39;t include your layout&quot; if it is an ajax request, than it would be to explicitly include the layout if it&#39;s not an ajax.

MVC 3: How to render a view without its layout page when loaded via ajax?

I couldn&#39;t find any real sources for this. I&#39;m building a site in ASP.NET MVC 3 and would like to take advantage of the Markdown editor that Stack Overflow uses. Does anybody have a good tutorial?

Where do you download the latest markdown? What language is it written in? Where would I start in integrating this into an MVC 3 project? Even after all the searching and reading I&#39;ve done I&#39;m still pretty confused.

I came across [this site](http://daringfireball.net/projects/markdown/). But this seems outlandishly old and it would seem I would have to learn a little something about CGI and Perl which I have absolutely no experience with. A JavaScript/jQuery version would be splendid.

# Update

I noticed this question is getting a fair amount of views so I decided to update it with some helpful references. I managed to get a Markdown editor working nicely on my website, and I wrote a few blogs about it.

- [MarkdownSharp and Encoded HTML](https://www.chevtek.io/mardownsharp-and-encoded-html/)
- [JQuery WMD Plugin](https://www.chevtek.io/jquery-wmd-plugin/)
- [Finding and implementing the WMD editor](https://www.chevtek.io/finding-and-implementing-the-wmd-editor/)

How to use ASP.NET MVC 3 and Stack Overflow&#39;s Markdown

&gt; **Possible Duplicates:**  
&gt; [IList&amp;lt;int&amp;gt; vs List&amp;lt;int&amp;gt;](https://stackoverflow.com/questions/1367539/ilistint-vs-listint)  
&gt; [C# - List&amp;lt;T&amp;gt; or IList&amp;lt;T&amp;gt;](https://stackoverflow.com/questions/400135/c-listt-or-ilistt)  

&lt;!-- End of automatically inserted text --&gt;

What is the difference between List and IList, which one has better performance and when to use List over IList and vice versa?

Difference between List and IList

There is an entity type called `Product` that is generated by entity framework.
I have written this query

    public IQueryable&lt;Product&gt; GetProducts(int categoryID)
    {
        return from p in db.Products
               where p.CategoryID== categoryID
               select new Product { Name = p.Name};
    }

The code below throws the following error : 

&gt; &quot;The entity or complex type Shop.Product cannot be constructed in a
&gt; LINQ to Entities query&quot;

    var products = productRepository.GetProducts(1).Tolist();

But when I use `select p` instead of `select new Product { Name = p.Name};` it works correctly.

How can I preform a custom select section?


The entity cannot be constructed in a LINQ to Entities query

What is a good practice of setting control focus in MVVM architecture. 

The way I envision it, is with a property on the ViewModel that would trigger a focus change when needed. And than have the UI controls bind/listen to that property so that if it changes, appropriate focus will be set. 

I see it as a ViewModel thing, because i want to set focus appropriate after a certain action was performed by the ViewModel, such as loading certain data. 

What&#39;s the best practice? 


WPF-MVVM: Setting UI control focus from ViewModel

I&#39;m trying to read an embedded text file with `System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resource);` but it gives me a `Stream`. The embedded resource is a text file so, how can I turn this `Stream` into a `TextReader`?

Get a TextReader from a Stream?

I have the situation where I&#39;m initializing my model in DatabaseInitializer() for EF 4.1 and get this annoying error `&quot;Validation failed for one or more entities. See &#39;EntityValidationErrors&#39; property for more details.&quot;` So, I go to this EntityValidationErrors and there is a field `{System.Data.Entity.Validation.DbEntityValidationResult}` which gives me no information at all about what field it was unable to initialize. 
Is there a way to get more info about this error?

**To clear things out:**

I know how to fix the string length problem. What I&#39;m asking is how do I get the exact field name that is breaking the model. 

Getting exact error type in from DbValidationException

I have **date and time** in a string formatted like that one:

    &quot;2011-03-21 13:26&quot; //year-month-day hour:minute

How can I parse it to `System.DateTime`?

I want to use functions like `DateTime.Parse()` or `DateTime.ParseExact()` if possible, to be able to specify the format of the date manually.



Parse string to DateTime in C#

According to the [Windows Applications Development with Microsoft .NET 4 70-511][1] Training Kit

What is the difference between the `Label` control and `TextBlock` control since both are content controls and just displaying text?


  [1]: http://www.microsoft.com/learning/en/us/exam.aspx?ID=70-511&amp;locale=en-us

Difference between Label and TextBlock

I&#39;m binding the Source property of an Image to a string. This string may be null in which case I just don&#39;t want to display an Image. However, I&#39;m getting the following in my Debug output:

&gt; System.Windows.Data Error: 23 : Cannot
&gt; convert &#39;&amp;lt;null&amp;gt;&#39; from type &#39;&amp;lt;null&amp;gt;&#39; to
&gt; type
&gt; &#39;System.Windows.Media.ImageSource&#39; for
&gt; &#39;en-AU&#39; culture with default
&gt; conversions; consider using Converter
&gt; property of Binding.
&gt; NotSupportedException:&#39;System.NotSupportedException:
&gt; ImageSourceConverter cannot convert
&gt; from (null).    at
&gt; System.ComponentModel.TypeConverter.GetConvertFromException(Object
&gt; value)    at
&gt; System.Windows.Media.ImageSourceConverter.ConvertFrom(ITypeDescriptorContext
&gt; context, CultureInfo culture, Object
&gt; value)    at
&gt; MS.Internal.Data.DefaultValueConverter.ConvertHelper(Object
&gt; o, Type destinationType,
&gt; DependencyObject targetElement,
&gt; CultureInfo culture, Boolean
&gt; isForward)&#39;

I&#39;d prefer if this wasn&#39;t displayed as it&#39;s just noise - is there any way to suppress it?

ImageSourceConverter error for Source=null

I have two simple Model classes and a ViewModel...

    public class GridItem
    {
        public string Name { get; set; }
        public int CompanyID { get; set; }
    }

    public class CompanyItem
    {
        public int ID { get; set; }
        public string Name { get; set; }
    }

    public class ViewModel
    {
        public ViewModel()
        {
            GridItems = new ObservableCollection&lt;GridItem&gt;() {
                new GridItem() { Name = &quot;Jim&quot;, CompanyID = 1 } };

            CompanyItems = new ObservableCollection&lt;CompanyItem&gt;() {
                new CompanyItem() { ID = 1, Name = &quot;Company 1&quot; },
                new CompanyItem() { ID = 2, Name = &quot;Company 2&quot; } };
        }

        public ObservableCollection&lt;GridItem&gt; GridItems { get; set; }
        public ObservableCollection&lt;CompanyItem&gt; CompanyItems { get; set; }
    }

...and a simple Window:

    &lt;Window x:Class=&quot;DataGridComboBoxColumnApp.MainWindow&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;MainWindow&quot; Height=&quot;350&quot; Width=&quot;525&quot;&gt;
        &lt;Grid&gt;
            &lt;DataGrid AutoGenerateColumns=&quot;False&quot; ItemsSource=&quot;{Binding GridItems}&quot; &gt;
                &lt;DataGrid.Columns&gt;
                    &lt;DataGridTextColumn Binding=&quot;{Binding Name}&quot; /&gt;
                    &lt;DataGridComboBoxColumn ItemsSource=&quot;{Binding CompanyItems}&quot;
                                        DisplayMemberPath=&quot;Name&quot;
                                        SelectedValuePath=&quot;ID&quot;
                                        SelectedValueBinding=&quot;{Binding CompanyID}&quot; /&gt;
                &lt;/DataGrid.Columns&gt;
            &lt;/DataGrid&gt;
        &lt;/Grid&gt;
    &lt;/Window&gt;

The ViewModel is set to the MainWindow&#39;s `DataContext` in App.xaml.cs:

    public partial class App : Application
    {
        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            MainWindow window = new MainWindow();
            ViewModel viewModel = new ViewModel();

            window.DataContext = viewModel;
            window.Show();
        }
    }

As you can see I set the `ItemsSource` of the DataGrid to the `GridItems` collection of the ViewModel. This part works, the single Grid line with Name &quot;Jim&quot; is displayed.

I also want to set the `ItemsSource` of the ComboBox in every row to the `CompanyItems` collection of the ViewModel. This part does not work: The ComboBox remains empty and in the Debugger Output Window I see an error message:

&gt; System.Windows.Data Error: 2 : Cannot
&gt; find governing FrameworkElement or
&gt; FrameworkContentElement for target
&gt; element.
&gt; BindingExpression:Path=CompanyItems;
&gt; DataItem=null; target element is
&gt; &#39;DataGridComboBoxColumn&#39;
&gt; (HashCode=28633162); target property
&gt; is &#39;ItemsSource&#39; (type &#39;IEnumerable&#39;)

I believe that WPF expects `CompanyItems` to be a property of `GridItem` which is not the case, and that&#39;s the reason why the binding fails.

I&#39;ve already tried to work with a `RelativeSource` and `AncestorType` like so:

    &lt;DataGridComboBoxColumn ItemsSource=&quot;{Binding CompanyItems, 
        RelativeSource={RelativeSource Mode=FindAncestor,
                                       AncestorType={x:Type Window}}}&quot;
                            DisplayMemberPath=&quot;Name&quot;
                            SelectedValuePath=&quot;ID&quot;
                            SelectedValueBinding=&quot;{Binding CompanyID}&quot; /&gt;

But that gives me another error in the debugger output:

&gt; System.Windows.Data Error: 4 : Cannot
&gt; find source for binding with reference
&gt; &#39;RelativeSource FindAncestor,
&gt; AncestorType=&#39;System.Windows.Window&#39;,
&gt; AncestorLevel=&#39;1&#39;&#39;.
&gt; BindingExpression:Path=CompanyItems;
&gt; DataItem=null; target element is
&gt; &#39;DataGridComboBoxColumn&#39;
&gt; (HashCode=1150788); target property is
&gt; &#39;ItemsSource&#39; (type &#39;IEnumerable&#39;)

**Question: How can I bind the ItemsSource of the DataGridComboBoxColumn to the CompanyItems collection of the ViewModel? Is it possible at all?**

Thank you for help in advance!

Binding ItemsSource of a ComboBoxColumn in WPF DataGrid

Where can I find a control which is like the C# Timer Control in WPF?

Content Type	Original Author	Original Content on Stackoverflow
Question	alansiqueira27	View Question on Stackoverflow
Solution 1 - C#	biju	View Answer on Stackoverflow
Solution 2 - C#	Akshay J	View Answer on Stackoverflow
Solution 3 - C#	Kombinator	View Answer on Stackoverflow
Solution 4 - C#	Newred	View Answer on Stackoverflow

How to center a label text in WPF?

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Force point (".") as decimal separator in java

Android preferences onclick event

Attributions