What about setting `GridLinesVisibility=&quot;None&quot;`?

    &lt;DataGrid GridLinesVisibility=&quot;None&quot;&gt;
        ...
    &lt;DataGrid&gt;

You could also do it this way

     dataGrid.GridLinesVisibility = DataGridGridLinesVisibility.None;

I&#39;ve seen a bunch of examples for changing the size of a UILabel.

Here&#39;s what I&#39;d like to do:
Change the font size so that the text will be as large as possible within the new height.

Any clues?

How to set font size to fill UILabel height?

*I&#39;m refactoring my XML-serialization, and figured I&#39;d try the DataContractSerializer.
Everything runs smoothly, until it needs to serialize this class:*

    using System;
    using System.Runtime.Serialization;

    namespace VDB_Sync.Model
    {
    [DataContract(Name=&quot;Konstant&quot;)]
    public class Konstant : DataFelt
    {
        [DataMember]
        private MySqlDbType mydataType;
        [DataMember]
        private object value;

        public Konstant(string navn, MySqlDbType dataType, object value)
            : base(navn, dataType, &quot;*Konstant&quot;, false, false)
        {
            //this.navn = navn;
            this.mydataType = dataType;
            this.value = value;

            if (navn.Contains(&quot;*L&#248;benummer&quot;))
            {
                navn = &quot;*Konstant: &quot; + Convert.ToString(value);
            }
        }

        public object Value
        {
            get
            {
                return value;
            }
        }

    }
    }

*It give&#39;s me this:*

&gt; **Type &#39;VDB_Sync.Model.Konstant&#39; with data contract name &#39;Konstant:http://schemas.datacontract.org/2004/07/VDB_Sync.Model&#39; is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.**

*The help I&#39;ve found so far points to collections and Types. I do have an enum (MySqlDbType) in my class - but get this: I even get the same error when i have no DataMembers declared at all :-x
So - what&#39;s going on here? What am I missing?

for reference, this is how i serialized it, VDB_SessionController being the root:*

        public void GemKonfig(VDB_SessionController session)
        {
            var settings = new XmlWriterSettings()
            {
                Indent = true,
                IndentChars = &quot;\t&quot;
            };

            var writer = XmlWriter.Create(defaultFile, settings);
            DataContractSerializer ser =
                new DataContractSerializer(typeof(VDB_SessionController));

            ser.WriteObject(writer, session);
            writer.Close();
        }

&quot;Type not expected&quot;, using DataContractSerializer - but it&#39;s just a simple class, no funny stuff?

I want to hide (or remove) all the borders of all the rows (and subsequently cells) in my datagrid, think a basic [HTML table][1]. I&#39;ve looked all over and most questions seem to be about styling them and not hiding them.

I&#39;ve already tried setting the BorderBrush and BorderThickness like so:

     &lt;DataGrid.RowStyle&gt;
         &lt;Style TargetType=&quot;DataGridRow&quot;&gt;
             &lt;Setter Property=&quot;BorderBrush&quot; Value=&quot;Transparent&quot; /&gt;
             &lt;Setter Property=&quot;BorderThickness&quot; Value=&quot;0&quot; /&gt;
         &lt;/Style&gt;
      &lt;/DataGrid.RowStyle&gt;


Tried the same for the CellStyle, but no dice, still seeing borders.

  [1]: http://jsfiddle.net/QSqMt/

Removing all DataGrid row and cell borders

I want to hide (or remove) all the borders of all the rows (and subsequently cells) in my datagrid, think a basic <a href="http://jsfiddle.net/QSqMt/" target="_blank" rel="noopener noreferrer">HTML table</a>. I've looked all over and most questions seem to be about styling them and not hiding them.
I've already tried setting the BorderBrush and BorderThickness like so:
<pre><code class="hljs language-php-template"> &#x3C;DataGrid.RowStyle>
 &#x3C;Style TargetType="DataGridRow">
 &#x3C;Setter Property="BorderBrush" Value="Transparent" />
 &#x3C;Setter Property="BorderThickness" Value="0" />
 &#x3C;/Style>
 &#x3C;/DataGrid.RowStyle>
</code></pre>
Tried the same for the CellStyle, but no dice, still seeing borders.

How can I remove blank values from an array?

For example:

    string[] test={&quot;1&quot;,&quot;&quot;,&quot;2&quot;,&quot;&quot;,&quot;3&quot;};

in this case, is there any method available to remove blank values from the array using C#?

At the end, I want to get an array in this format:

    test={&quot;1&quot;,&quot;2&quot;,&quot;3&quot;};

which means 2 values removed from the array and eventually I get 3.



Remove blank values from array using C#

I often see it mentioned that `Thread.Sleep();` should not be used, but I can&#39;t understand why this is so. If `Thread.Sleep();` can cause trouble, are there any alternative solutions with the same result that would be safe?

eg.

    while(true)
    {
        doSomework();
        i++;
        Thread.Sleep(5000);
    }

another one is:

    while (true)
    {
        string[] images = Directory.GetFiles(@&quot;C:\Dir&quot;, &quot;*.png&quot;);
    
        foreach (string image in images)
        {
            this.Invoke(() =&gt; this.Enabled = true);
            pictureBox1.Image = new Bitmap(image);
            Thread.Sleep(1000);
        }
    }

Why is Thread.Sleep so harmful

I know that I can use the verbose syntax for properties:

    private string _postalCode;

    public string PostalCode
    {
        get { return _postalCode; }
        set { _postalCode = value; }
    }

Or I can use auto-implemented properties.

    public string PostalCode { get; set; }

Can I somehow access the backing field that is behind the auto-implemented property? (In this example that would be _**postalCode**). 

----------
**Edit**: My question is not about design, but rather about, let&#39;s say, theoretical ability to do so.

Is it possible to access backing fields behind auto-implemented properties?

I&#39;m looking for advice regarding effective unit testing of .NET mvc controllers. 

Where I work, many such tests use moq to mock the data layer and to assert that certain data-layer methods are called. This doesn&#39;t seem useful to me, since it essentially verifies that the implementation has not changed rather than testing the API.

I&#39;ve also read articles recommending things like checking that the type of view model returned is correct. I can see that providing some value, but alone it doesn&#39;t seem to merit the effort of writing many lines of mocking code (our application&#39;s data model is very large and complex).

Can anyone suggest some better approaches to controller unit testing or explain why the above approaches are valid/useful?

Thanks!

How should one unit test a .NET MVC controller?

I am having a problem where I am trying to delete my file but I get an exception.

    if (result == &quot;Success&quot;)
    {
         if (FileUpload.HasFile)
         {
             try
             {
                  File.Delete(Request.PhysicalApplicationPath + app_settings.login_images + txtUploadStatus.Text);
                  string filename = Path.GetFileName(btnFileUpload.FileName);
                  btnFileUpload.SaveAs(Request.PhysicalApplicationPath + app_settings.login_images + filename);
             }
             catch (Exception ex)
             {
                   Message(ex.ToString());
             }
          }
    }

Also I should note that the folder I am trying to delete from has full control to network services.

The full exception message is:

&gt;System.UnauthorizedAccessException: Access to the path &#39;C:\Users\gowdyn\Documents\Visual Studio 2008\Projects\hybrid\hybrid\temp_loginimages\enviromental.jpg&#39; is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.Delete(String path) at hybrid.User_Controls.Imgloader_Add_Edit_Tbl.btnUpdate_Click(Object sender, EventArgs e) in C:\Users\gowdyn\Documents\Visual Studio 2008\Projects\hybrid\hybrid\User_Controls\Imgloader_Add_Edit_Tbl.ascx.cs:line 242 

Any ideas?

Why is access to the path denied?

I&#39;m trying to insert some data in my database using Entity Framework model, but for some unknown reasons to me, it does nothing.

Am I missing something here?

    using (var context = new DatabaseEntities())
    {
        var t = new test
        {
            ID = Guid.NewGuid(),
            name = &quot;blah&quot;,
        };
        context.AddTotest(t);
        context.SaveChanges();
    }

Insert data using Entity Framework model

Today I was surprised to find that in C# I can do:

    List&lt;int&gt; a = new List&lt;int&gt; { 1, 2, 3 };

Why can I do this? What constructor is called? How can I do this with my own classes? I know that this is the way to initialize arrays but arrays are language items and Lists are simple objects ...

Why can I initialize a List like an array in C#?

I&#39;m studying C# by following the guides in *MSDN*.  

Now, I just tried the *Example 1* ([here][1] is the link to *MSDN*), and I&#39;ve encountered an issue: why is the console window closing immediately once displayed my output?

    using System;
    
    public class Hello1
    {
        public static int Main()
        {
            Console.WriteLine(&quot;Hello, World!&quot;);
            return 0;
        }
    }


  [1]: https://msdn.microsoft.com/en-US/office/aa288463(v=vs.90)

Why is the console window closing immediately once displayed my output?

I read the [MSDN documentation](https://msdn.microsoft.com/en-us/library/dd780623(v=vs.110).aspx) but didn&#39;t really understand it.

I believe that the behavior of `Set` is &quot;replace existing, or add&quot; (atomically).

Is that correct?

What&#39;s the difference between MemoryCache.Add and MemoryCache.Set?

I was looking for an efficient approach for calculating a&lt;sup&gt;b&lt;/sup&gt; (say `a = 2` and `b = 50`). To start things up, I decided to take a look at the implementation of `Math.Pow()` function. But in [.NET Reflector][1], all I found was this:

    [MethodImpl(MethodImplOptions.InternalCall), SecuritySafeCritical]
    public static extern double Pow(double x, double y);

What are some of the resources wherein I can see as what&#39;s going on inside when I call `Math.Pow()` function?

  [1]: http://en.wikipedia.org/wiki/.NET_Reflector


How is Math.Pow() implemented in .NET Framework?

I&#39;m wondering how I can extract (get a copy) of the Default Template of a given control using Visual Studio. I know this can be done with Expression Blend (right click a control, &quot;Edit Template&quot; -&gt; &quot;Edit a Copy...&quot;) which then copies the default control template in my Xaml. But can this be done with Visual Studio at all?


How to Extract Default Control Template In Visual Studio?

I have used WPF&#39;s 3D capabilities for learning, and for a few implementations, and I have found it to be very capable, and I am also learning DirectX 11, and it is very tricky compared to using 3D classes in WPF. I have only used WPF 3D for very basic stuff, my question is:

Is WPF 3D equally good for advanced applications such as 3D modelling tools, game engines and 3D simulations etc to be an alternative to DirectX and OpenGL?

If there is anything else in the same league, please mention it too.

Is WPF 3D good alternate of DirectX and OpenGL for complex applications?

Let&#39;s say I have `TextBlock` with text **&quot;Some Text&quot;** and **font size 10.0**.


How I can calculate appropriate `TextBlock` **width**?



How to calculate WPF TextBlock width for its known font size and characters?

I&#39;m looking for a way that I can parse command line arguments into my WPF application with just a way of reading the value of the argument that the user passed.

As an example

    application.exe /setTime 5

is there a way for me to have some code where I can just say:

    MessageBox.Show(arg(&quot;setTime&quot;));

Which will output `5`


**Working Solution**

[How to create smart WPF Command Line Arguments][1]


  [1]: http://sa.ndeep.me/post/how-to-create-smart-wpf-command-line-arguments

WPF Command Line Arguments, a smart way?

I am trying to bind a list of string values to a listbox so that their values are listed line by line. Right now I use this:
  

    &lt;ListBox Margin=&quot;20&quot; ItemsSource=&quot;{Binding Path=PersonNames}&quot;&gt;
        &lt;ListBox.ItemTemplate&gt;
            &lt;DataTemplate&gt;
                &lt;StackPanel Orientation=&quot;Horizontal&quot;&gt;
                    &lt;TextBlock Text=&quot;{Binding Path=Id}&quot;&gt;&lt;/TextBlock&gt;
                &lt;/StackPanel&gt;
            &lt;/DataTemplate&gt;
        &lt;/ListBox.ItemTemplate&gt;
    &lt;/ListBox&gt;

But I don&#39;t know what I am supposed to put into the textblock, instead of `Id`, since they are all string values, not custom classes.

Also it complains not having to find the PersonNames when I have it inside MainPage, as MainPage.PersonNames.

I set the data context to:


    DataContext=&quot;{Binding RelativeSource={RelativeSource Self}}&quot;

I am doing it wrong?

How can I data bind a list of strings to a ListBox in WPF/WP7?

I&#39;m facing some issues with a WPF binding to a static property. In my application there is a class called **Globals** which contains a *static* property to **ThisAddIn**. This object allows me to access a User property which basically is what I want to use in my Binding. So, my XAML looks like this:

    &lt;TextBlock Text=&quot;{Binding Path=User.Name
                       , Source={x:Static Member=s:Globals.ThisAddIn}}&quot; /&gt;

The namespace **s** is declared at the top by the following line:

    xmlns:s=&quot;clr-namespace:ConsoleApplication16.Model&quot;


I found a ton of different approaches of how to refer to the static Property in XAML, but none of them worked except for this one, which also seems the most logical for me. Some samples I found, did not use Path or Member at all. 

After some testing I found the right way to do this, is using &quot;x:Static Member&quot; to define the class and the static property you want to use, while Path defines the correct Properties inside this object, just like a normal binding would do. 

Although this solution compiles without any complains, a XAMLParseException pops up directly telling me that the **StaticExtension value cannot be resolved to an enumeration, static field, or static property.**

StaticExtension value cannot be resolved

I want to create a menu bar identical to the one in windows forms in my WPF application. 

How would I do this?

The menu option in the WPF controls toolbox only gives a blank bar.

Create a menu Bar in WPF?

So I&#39;ve been searching around and cannot find out exactly how to do this.  I&#39;m creating a user control using MVVM and would like to run a command on the &#39;Loaded&#39; event.  I realize this requires a little bit of code behind, but I can&#39;t quite figure out what&#39;s needed.  The command is located in the ViewModel, which is set as the datacontext of the view, but I&#39;m not sure exactly how to route this so I can call it from the code behind of the loaded event.  Basically what I want is something like this...

    private void UserControl_Loaded(object sender, RoutedEventArgs e)
    {
        //Call command from viewmodel
    }

Looking around I can&#39;t seem to find the syntax for this anywhere.  Do I need to bind the command in the xaml first to be able to reference it?  I notice the command bindings option within a user control will not let you bind commands as you can within something like a button...

    &lt;UserControl.CommandBindings&gt;
        &lt;CommandBinding Command=&quot;{Binding MyCommand}&quot; /&gt; &lt;!-- Throws compile error --&gt;
    &lt;/UserControl.CommandBindings&gt;

I&#39;m sure there&#39;s a simple way to do this, but I can&#39;t for the life of me figure it out.  



Call Command from Code Behind

I&#39;ve seen several suggestions, that you can add hyperlink to WPF application through `Hyperlink` control.

Here&#39;s how I&#39;m trying to use it in my code: 

	&lt;Window
			xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
			xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
			xmlns:d=&quot;http://schemas.microsoft.com/expression/blend/2008&quot; 
			xmlns:mc=&quot;http://schemas.openxmlformats.org/markup-compatibility/2006&quot; 
			mc:Ignorable=&quot;d&quot; 
			x:Class=&quot;BookmarkWizV2.InfoPanels.Windows.UrlProperties&quot;
			Title=&quot;UrlProperties&quot; Height=&quot;754&quot; Width=&quot;576&quot;&gt;
		&lt;Grid&gt;
			&lt;Grid.RowDefinitions&gt;
				&lt;RowDefinition&gt;&lt;/RowDefinition&gt;
				&lt;RowDefinition Height=&quot;40&quot;/&gt;
			&lt;/Grid.RowDefinitions&gt;
			&lt;Grid&gt;
				&lt;ScrollViewer ScrollViewer.VerticalScrollBarVisibility=&quot;Auto&quot; Grid.RowSpan=&quot;2&quot;&gt;
					&lt;StackPanel &gt;
						&lt;DockPanel LastChildFill=&quot;True&quot; Margin=&quot;0,5&quot;&gt;
							&lt;TextBlock Text=&quot;Url:&quot; Margin=&quot;5&quot; 
								DockPanel.Dock=&quot;Left&quot; VerticalAlignment=&quot;Center&quot;/&gt;
							&lt;TextBox Width=&quot;Auto&quot;&gt;
								&lt;Hyperlink NavigateUri=&quot;http://www.google.co.in&quot;&gt;
										Click here
								&lt;/Hyperlink&gt;   
							&lt;/TextBox&gt;						
						&lt;/DockPanel &gt;
					&lt;/StackPanel&gt;
				&lt;/ScrollViewer&gt;        
			&lt;/Grid&gt;
			&lt;StackPanel HorizontalAlignment=&quot;Right&quot; Orientation=&quot;Horizontal&quot; Margin=&quot;0,7,2,7&quot; Grid.Row=&quot;1&quot; &gt;
				&lt;Button Margin=&quot;0,0,10,0&quot;&gt;
					&lt;TextBlock Text=&quot;Accept&quot; Margin=&quot;15,3&quot; /&gt;
				&lt;/Button&gt;
				&lt;Button Margin=&quot;0,0,10,0&quot;&gt;
					&lt;TextBlock Text=&quot;Cancel&quot; Margin=&quot;15,3&quot; /&gt;
				&lt;/Button&gt;
			&lt;/StackPanel&gt;
		&lt;/Grid&gt;
	&lt;/Window&gt;

I&#39;m getting following error:

&gt; Property &#39;Text&#39; does not support values of type &#39;Hyperlink&#39;.	

What am I doing wrong?

Example using Hyperlink in WPF

I have an application which updates my datagrid each time a log file that I&#39;m watching gets updated (Appended with new text) in the following manner:

    private void DGAddRow(string name, FunctionType ft)
        {
                    ASCIIEncoding ascii = new ASCIIEncoding();

        CommDGDataSource ds = new CommDGDataSource();

        int position = 0;
        string[] data_split = ft.Data.Split(&#39; &#39;);
        foreach (AttributeType at in ft.Types)
        {
            if (at.IsAddress)
            {

                ds.Source = HexString2Ascii(data_split[position]);
                ds.Destination = HexString2Ascii(data_split[position+1]);
                break;
            }
            else
            {
                position += at.Size;
            }
        }
        ds.Protocol = name;
        ds.Number = rowCount;
        ds.Data = ft.Data;
        ds.Time = ft.Time;
            
        dataGridRows.Add(ds); 
           
        rowCount++;
        }
        ...
        private void FileSystemWatcher()
        {
            FileSystemWatcher watcher = new FileSystemWatcher(Environment.CurrentDirectory);
            watcher.Filter = syslogPath;
            watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
                | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            watcher.Changed += new FileSystemEventHandler(watcher_Changed);
            watcher.EnableRaisingEvents = true;
        }

        private void watcher_Changed(object sender, FileSystemEventArgs e)
        {
            if (File.Exists(syslogPath))
            {
                string line = GetLine(syslogPath,currentLine);
                foreach (CommRuleParser crp in crpList)
                {
                    FunctionType ft = new FunctionType();
                    if (crp.ParseLine(line, out ft))
                    {
                        DGAddRow(crp.Protocol, ft);
                    }
                }
                currentLine++;
            }
            else
                MessageBox.Show(UIConstant.COMM_SYSLOG_NON_EXIST_WARNING);
        }


When the event is raised for the FileWatcher, because it creates a separate thread, when I try to run dataGridRows.Add(ds); to add the new row, the program just crashes without any warning given during debug mode.

In Winforms, this was easily solved by utilizing the Invoke function but I am not sure how to go about this in WPF. 

Accessing UI (Main) Thread safely in WPF

I&#39;ve got a WPF application using datagrid. The application worked fine until I installed Visual&amp;nbsp;Studio&amp;nbsp;2012 and Blend+SketchFlow preview. Now, when I&#39;m trying to copy the data from the grid into the clipboard with &lt;kbd&gt;Ctrl&lt;/kbd&gt; + &lt;kbd&gt;C&lt;/kbd&gt; (in any application), I&#39;m getting the following exception:

    System.Runtime.InteropServices.COMException (0x800401D0): OpenClipboard Failed (Exception from HRESULT: 0x800401D0 (CLIPBRD_E_CANT_OPEN))
       at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
       at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR(Int32 errorCode, IntPtr errorInfo)
       at System.Windows.Clipboard.Flush()
       at System.Windows.Clipboard.CriticalSetDataObject(Object data, Boolean copy)
       at System.Windows.Controls.DataGrid.OnExecutedCopy(ExecutedRoutedEventArgs args)
       at System.Windows.Controls.DataGrid.OnExecutedCopy(Object target, ExecutedRoutedEventArgs args)
       at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.Input.CommandManager.ExecuteCommandBinding(Object sender, ExecutedRoutedEventArgs e, CommandBinding commandBinding)
       at System.Windows.Input.CommandManager.FindCommandBinding(CommandBindingCollection commandBindings, Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
       at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute)
       at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e)
       at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
       at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
       at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
       at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
       at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
       at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated)
       at System.Windows.Input.RoutedCommand.ExecuteCore(Object parameter, IInputElement target, Boolean userInitiated)
       at System.Windows.Input.CommandManager.TranslateInput(IInputElement targetElement, InputEventArgs inputEventArgs)
       at System.Windows.UIElement.OnKeyDownThunk(Object sender, KeyEventArgs e)
       at System.Windows.Input.KeyEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
       at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
       at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
       at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
       at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
       at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
       at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
       at System.Windows.Input.InputManager.ProcessStagingArea()
       at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
       at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
       at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
       at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG&amp; msg, Boolean&amp; handled)
       at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG&amp; msg, ModifierKeys modifiers)
       at System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg)
       at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(MSG&amp; msg, Boolean&amp; handled)
       at System.Windows.Interop.HwndSource.WeakEventPreprocessMessage.OnPreprocessMessage(MSG&amp; msg, Boolean&amp; handled)
       at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(MSG&amp; msg)
       at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
       at System.Windows.Threading.Dispatcher.Run()
       at System.Windows.Application.RunDispatcher(Object ignore)
       at System.Windows.Application.RunInternal(Window window)
       at System.Windows.Application.Run(Window window)
       at System.Windows.Application.Run()

This is really annoying.

I&#39;ve seen some references to this problem [here][1] and on various locations on the web, with no real solution.

I can verify that the clipboard is locked when this exception is raised in Visual Studio, as I couldn&#39;t copy paste the message (had to write it to a file). Also, the clipboard wasn&#39;t locked before the copy process started.

How to solve this problem?

  [1]: https://stackoverflow.com/questions/10855940/wpf-datagrid-comexception-on-using-includeheader-clipboardcopymode


OpenClipboard failed when copy pasting data from WPF DataGrid

I&#39;m programming by WPF. I need a way to make center content of cells, in DataGrid control. I use this code also:

    &lt;DataGrid x:Name=&quot;dg1&quot; HorizontalAlignment=&quot;Left&quot; Margin=&quot;10,10,0,0&quot;
        VerticalAlignment=&quot;Top&quot; Height=&quot;360&quot; Width=&quot;498&quot;
        FontFamily=&quot;2  Badr&quot; FontSize=&quot;18&quot; 
        AlternatingRowBackground=&quot;LightCoral&quot; FlowDirection=&quot;RightToLeft&quot;
        HorizontalContentAlignment=&quot;Center&quot; VerticalContentAlignment=&quot;Center&quot; 
        Background=&quot;{x:Null}&quot;/&gt;
        
What is wrong?


 

Text alignment in DataGrid

I used Drag and Drop to bind Data Source object (a DB model) to `DataGrid` (basically following this example in [Entity Framework Databinding with WPF](http://msdn.microsoft.com/en-us/data/jj574514). 

Everything works fine with this implementation.

XAML
----

    &lt;Window.Resources&gt;    
    &lt;CollectionViewSource x:Key=&quot;categoryViewSource&quot;  
        d:DesignSource=&quot;{d:DesignInstance {x:Type local:Category}, CreateList=True}&quot;/&gt;
    &lt;/Window.Resources&gt;
    &lt;Grid DataContext=&quot;{StaticResource categoryViewSource}&quot;&gt;
    ..

Code Behind
--

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
       System.Windows.Data.CollectionViewSource categoryViewSource =
          ((System.Windows.Data.CollectionViewSource)(this.FindResource(&quot;categoryViewSource&quot;)));

      _context.Categories.Load();
      categoryViewSource.Source = _context.Categories.Local;        
    }

ViewModel
--

    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = new MyViewModel();
    }

---

However, when I try to use the same code from within ViewModel, it doesn‘t work (`FindResource` is not available), besides, I don’t think this is the right approach (i.e. to use `x:Key` in MVVM).

I would really appreciate any help to point me what is the right way to implement `CollectionViewSource` and `DataBinding` with `DataGrid`.


Proper way to use CollectionViewSource in ViewModel

How can I hide a column in a WPF `DataGrid` through a Binding?

This is what I did:

    &lt;DataGridTextColumn Header=&quot;Column header&quot;
                        Binding=&quot;{Binding ColumnValue}&quot;
                        Width=&quot;100&quot;
                        ElementStyle=&quot;{StaticResource DataGridRightAlign}&quot;
                        Visibility=&quot;{Binding MyColumnVisibility}&quot; /&gt;

And this is what I got (besides the column still visible):

&gt; System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=MyColumnVisibility; DataItem=null; target element is &#39;DataGridTextColumn&#39; (HashCode=1460142); target property is &#39;Visibility&#39; (type &#39;Visibility&#39;)

How to fix the binding?

Content Type	Original Author	Original Content on Stackoverflow
Question	diggingforfire	View Question on Stackoverflow
Solution 1 - C#	Adi Lester	View Answer on Stackoverflow
Solution 2 - C#	Ramgy Borja	View Answer on Stackoverflow

Removing all DataGrid row and cell borders

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

"Type not expected", using DataContractSerializer - but it's just a simple class, no funny stuff?

How to set font size to fill UILabel height?

Attributions