The `ToolBar` class defines a `Style` that makes `Button`s look flat. An example of using it is:

    &lt;Button Style=&quot;{StaticResource {x:Static ToolBar.ButtonStyleKey}}&quot;/&gt;

This also works for a `ToggleButton` when using `ToggleButtonStyleKey`.

WPF lets you completely restyle controls to make them look like whatever you want, which is why it doesn&#39;t have such a specific `FlatStyle` property on the `Button` control.

Add the following to your Window/Page resources:

    &lt;Style BasedOn=&quot;{StaticResource {x:Static ToolBar.ButtonStyleKey}}&quot; TargetType=&quot;Button&quot;&gt;&lt;/Style&gt;

It will apply the flat style to all buttons in that styles scope.

Today, I found myself coding something like this ...

    public class LocalEnums {
    	
    	public LocalEnums() {
    	}
    	
    	public void foo() {
    		enum LocalEnum {
    			A,B,C
    		};
    		
    		// ....
    		// class LocalClass { }
                
    	}
    }

and I was kind of surprised when the compiler reported an error on the local `enum`:

&gt; The member enum LocalEnum cannot be
&gt; local

Why can&#39;t **enums** be declared local like **classes**?

I found this very useful in certain situations. In the case I was working, the rest of the code didn&#39;t need to know anything about the `enum`.

Is there any *structural/design* conflict that explains why this is not possible or could this be a *future* feature of Java?

Why can&#39;t enums be declared locally in a method?

From whatever little I understand by reading various material, public-private key pair are the basis of asymmetric encryption and also something about choosing 2 prime numbers (which is roughly your private key) and multiplying them (which is roughly your public key). It appears to me that it is possible to generate a public key if you know the private key. Is it correct or I am mistaking something?

What made me more confusing was that it is not possible to serialize the RSA key to XML with *only* private key (using .NET class RSACryptoServiceProvider). Not sure whether this limitation is intentional or not!

Given a private key, is it possible to derive its public key?

I have just been learning about how styles and control templates in WPF can affect the appearance of buttons,

I&#39;m trying to set the Button&#39;s FlatStyle, in the resources I&#39;ve seen I can&#39;t find anything that tells me how I can do this, in Windows Forms this is set through `FlatStyle = Flat`.

How would one do this in WPF?

Setting Button FlatStyle in WPF

I have just been learning about how styles and control templates in WPF can affect the appearance of buttons,
I'm trying to set the Button's FlatStyle, in the resources I've seen I can't find anything that tells me how I can do this, in Windows Forms this is set through <code>FlatStyle = Flat</code>.
How would one do this in WPF?

What&#39;s the difference between the `WebConfigurationManager` and the `ConfigurationManager`?

When should I use one over the other?

**UPDATED**

I just looked at the `WebConfigurationManager`, and for some reason, you can&#39;t access the connection strings as you do in the `ConfigurationManager` (like an array).  Can anyone tell me why MS made it like this?  It seems to be a pain to get the connection string you need using the `WebConfigurationManager`.

**UPDATED AGAIN with CAVEAT!**

If you don&#39;t have a reference to the `System.Configuration` namespace added to your project, then Visual Studio will show an error when you try and access the `WebConfigurationManager.ConnectionStrings` like an array!

What&#39;s the difference between the WebConfigurationManager and the ConfigurationManager?

Can you explain to me why I should inherit from `ICloneable` and implement the `Clone()` method?

If I want to do a deep copy, can&#39;t I just implement my method? Let&#39;s say `MyClone()`?

Why should I inherit from `ICloneable`? What are the advantages? Is it just a matter of making code &quot;more readable&quot;?

Why should I implement ICloneable in c#?

Any ideas how to fix this?


    UserService.UserServiceClient userServiceClient = new UserServiceClient();
                userServiceClient.GetUsersCompleted += new EventHandler&lt;GetUsersCompletedEventArgs&gt;(userServiceClient_GetUsersCompleted);
                userServiceClient.GetUsersAsync(searchString);

.

    &lt;system.serviceModel&gt;
        &lt;bindings&gt;
            &lt;basicHttpBinding&gt;
                &lt;binding name=&quot;BasicHttpBinding_UserService&quot; 
                         maxBufferSize=&quot;2147483647&quot; 
                         maxReceivedMessageSize=&quot;2147483647&quot;&gt;
                    &lt;security mode=&quot;None&quot; /&gt;
                &lt;/binding&gt;
            &lt;/basicHttpBinding&gt;
        &lt;/bindings&gt;
        &lt;client&gt;
            &lt;endpoint address=&quot;http://localhost:52185/UserService.svc&quot; 
                      binding=&quot;basicHttpBinding&quot; 
                      bindingConfiguration=&quot;BasicHttpBinding_UserService&quot; 
                      contract=&quot;UserService.UserService&quot;
                      name=&quot;BasicHttpBinding_UserService&quot; /&gt;
        &lt;/client&gt;
        &lt;behaviors&gt;
            &lt;serviceBehaviors&gt;
                &lt;behavior name=&quot;Shell.Silverlight.Web.Service3Behavior&quot;&gt;
    	            &lt;serviceMetadata httpGetEnabled=&quot;true&quot; /&gt;
    	            &lt;serviceDebug includeExceptionDetailInFaults=&quot;false&quot; /&gt;
    	        &lt;/behavior&gt;
    	    &lt;/serviceBehaviors&gt;
    	&lt;/behaviors&gt;
    	&lt;serviceHostingEnvironment aspNetCompatibilityEnabled=&quot;true&quot;/&gt;
    	&lt;services&gt;
    	    &lt;service behaviorConfiguration=&quot;Shell.Silverlight.Web.Service3Behavior&quot; 
    	             name=&quot;Shell.Silverlight.Web.Service3&quot;&gt;
    	        &lt;endpoint address=&quot;&quot; 
    	                  binding=&quot;basicHttpBinding&quot; 
    	                  contract=&quot;Shell.Silverlight.Web.Service3&quot; /&gt;
    	        &lt;endpoint address=&quot;mex&quot; 
    	                  binding=&quot;mexHttpBinding&quot; 
    	                  contract=&quot;IMetadataExchange&quot; /&gt;
    	    &lt;/service&gt;
    	&lt;/services&gt;
    &lt;/system.serviceModel&gt;

Could not find default endpoint element that references contract &#39;UserService.UserService&#39; in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.

**Resolved!**

I didn&#39;t mention that this was a Silverlight application.  I had the wcf reference in a DLL which had it&#39;s own &quot;ServiceReferences.ClientConfig&quot; file.  I moved the contents of the DLL&#39;s ServiceReferences.ClientConfig to the main silverlight project and it worked.

WCF Error - Could not find default endpoint element that references contract &#39;UserService.UserService&#39;

Under a given namespace, I have a set of classes which implement an interface. Let&#39;s call it `ISomething`. I have another class (let&#39;s call it `CClass`) which knows about `ISomething` but doesn&#39;t know about the classes which implement that interface.

I would like that `CClass` to look for all the implementation of `ISomething`, instantiate an instance of it and execute the method.

Does anybody have an idea on how to do that with C# 3.5?

How to find all the classes which implement a given interface?

I need to update a row in a table, and get a column value from it. I can do this with

    UPDATE Items SET Clicks = Clicks + 1 WHERE Id = @Id;
    SELECT Name FROM Items WHERE Id = @Id

This generates 2 plans/accesses to the table. Is possibile in T-SQL to modify the UPDATE statement in order to update and return the Name column with 1 plan/access only?

I&#39;m using C#, ADO.NET `ExecuteScalar()` or `ExecuteReader()` methods.

SQL: Update a row and returning a column value with 1 query

I was wondering how people handle a ListBox control that has no items? e.g. I want to bind a list of search results but if no results are found i would like to display &quot;No results found&quot;. 

The way i currently tackle this is that i hide the listbox if the result set count = 0 and show a label with the &quot;No results found&quot; message. Ideally i would like something like the ASP .NET datagrid EmptyTemplate solution.

Cheers

WPF listbox empty datatemplate

I&#39;m new to WPF. I just want to know how should we add columns and rows programmatically to a DataGrid in WPF. The way we used to do it in windows forms. create table columns and rows, and bind it to DataGrid. 


I believe WPF DataGrid is bit different the one used in ASP.net and Windows form (correct me if I am wrong).

I have No. of rows and columns which I need to draw in DataGrid so that user can edit the data in the cells.

programmatically add column &amp; rows to WPF Datagrid

I have a few WPF applications and I want all my styles to be in a shared assembly instead of declaring them in each application separately.

I am looking for a way so I don&#39;t have to change all my `Style=&quot;{StaticResource BlahBlah}&quot;` in the existing applications; I just want to add the reference to this style assembly, and delete it from the current application, so it&#39;s taken from the assembly.

Is there any way?

Load WPF styles or other Static Resources from an external file or assembly

Say I want a `TextBlock` to have its `Width` equal to it&#39;s Parent container&#39;s `Width` (ie,  stretch from side to side) or a percentage of it&#39;s Parent Container `Width`, how can I accomplish this in `XAML` without specifying absolute values?

I want to do this so that if the Parent Container container is later on expanded (its&#39; `Width` increased), its&#39; Child Elements will also be expanded automatically.  (basically, like in HTML and CSS)




WPF: Setting the Width (and Height) as a Percentage Value

How can I align the column data to center in a WPF `DataGrid`?

Text alignment in a WPF DataGrid

I was wondering how one would find the controls in the HeaderTemplate or FooterTemplate of an Asp.Net Repeater control.

I can access them on the ItemDataBound event, but I was wondering how to get them after (for example to retrieve a value of an input in the header/footer).

Note: I posted this question here after finding the answer just so that I remember it (and maybe other people might find this useful).

How to find controls in a repeater header or footer

How do you add a scrollbar to a Panel control with many controls in windows form application?

I have a set of controls with attached commands and logic that are constantly reused in the same way.  I decided to create a user control that holds all the common controls and logic. 

However I also need the control to be able to hold content that can be named.  I tried the following:

&lt;!-- language: xaml --&gt;

    &lt;UserControl.ContentTemplate&gt;
        &lt;DataTemplate&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
            &lt;ContentPresenter Content=&quot;{TemplateBinding Content}&quot;/&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
        &lt;/DataTemplate&gt;
    &lt;/UserControl.ContentTemplate&gt;

However it seems any content placed inside the user control cannot be named.  For example if I use the control in the following way:

&lt;!-- language: xaml --&gt;

    &lt;lib:UserControl1&gt;
         &lt;Button Name=&quot;buttonName&quot;&gt;content&lt;/Button&gt;
    &lt;/lib:UserControl1&gt;

I receive the following error:

&gt; Cannot set Name attribute value &#39;buttonName&#39;
&gt; on element &#39;Button&#39;. &#39;Button&#39; is
&gt; under the scope of element
&gt; &#39;UserControl1&#39;, which already had a
&gt; name registered when it was defined in
&gt; another scope.

If I remove the buttonName, then it compiles, however I need to be able to name the content. How can I achieve this?

How to create a WPF UserControl with NAMED content

Getting into the first serious WPF project.  It seems like there are a lot of basic controls flat out missing.  Specifically, I am looking for the Numeric UpDown control.  Was there an out of band release that I missed?  Really don&#39;t feel like writing my own control.  

I do not want to use the WindowsFormHost and plop a WinForm ctl on it.  I want it to be fully WPF without any legacy junk.

Thanks

Where is the WPF Numeric UpDown control?

I&#39;m working on a python script that starts several processes and database connections. Every now and then I want to kill the script with a &lt;kbd&gt;Ctrl&lt;/kbd&gt;+&lt;kbd&gt;C&lt;/kbd&gt; signal, and I&#39;d like to do some cleanup.

In Perl I&#39;d do this:

&lt;!-- language: perl --&gt;

    $SIG{&#39;INT&#39;} = &#39;exit_gracefully&#39;;
    
    sub exit_gracefully {
        print &quot;Caught ^C \n&quot;;
        exit (0);
    }

How do I do the analogue of this in Python?

How do I capture SIGINT in Python?

In HTML/CSS you can define a style which can be applied to many types of elements, e.g.:

    .highlight {
        color:red;
    }

can be applied to both P and DIV, e.g.:

    &lt;p class=&quot;highlight&quot;&gt;this will be highlighted&lt;/p&gt;
    &lt;div class=&quot;highlight&quot;&gt;this will also be highlighted&lt;/div&gt;

but in XAML you seem to have to define the TargetType for styles, otherwise you get an error:

    &lt;Style x:Key=&quot;formRowLabel&quot; TargetType=&quot;TextBlock&quot;&gt;

is there a way to allow a XAML style to be applied to multiple elements or even to leave it open as in CSS?





Can you define multiple TargetTypes for one XAML style?

I have an order entry form that has a `ListBox` with a list of line items. I have my items template, and one of the values is a `ComboBox` in each of my Items.

Now, my form can also create Credit memo&#39;s in addition to purchase orders, but when I am creating a credit memo, I want to put the words &quot;Credit Memo&quot; over the list box,  however, the `TextBlock` covers the `ComboBox` in two of my line items. I would like to pass my click event through the `TextBlock` to the `ComboBox`es but I&#39;m not sure how to do it.

This is what I have, ( Maybe I am coming at this totally wrong, I am kinda a noob with WPF )

    &lt;ListBox SelectionMode=&quot;Single&quot; Grid.Row=&quot;2&quot; 
             ItemsSource=&quot;{Binding Path=LineItems}&quot; HorizontalContentAlignment=&quot;Stretch&quot; 
             IsSynchronizedWithCurrentItem=&quot;True&quot; Background=&quot;#66FFFFFF&quot;&gt;
        &lt;ListBox.ItemContainerStyle&gt;
            &lt;Style TargetType=&quot;{x:Type ListBoxItem}&quot;&gt;
                &lt;Setter Property=&quot;Background&quot; Value=&quot;WhiteSmoke&quot;/&gt;
                &lt;Setter Property=&quot;BorderThickness&quot; Value=&quot;1&quot; /&gt;
                &lt;Style.Triggers&gt;
                    &lt;DataTrigger Binding=&quot;{Binding Path=IsPartBackOrder}&quot; Value=&quot;True&quot;&gt;
                        &lt;Setter Property=&quot;Background&quot; Value=&quot;Orange&quot; /&gt;
                    &lt;/DataTrigger&gt;                       
                &lt;/Style.Triggers&gt;
            &lt;/Style&gt;
        &lt;/ListBox.ItemContainerStyle&gt;
        &lt;ListBox.ItemTemplate&gt;
            &lt;DataTemplate DataType=&quot;{x:Type Entities:SalesOrderLineItem}&quot; &gt;
                &lt;OrderEntry:SalesOrderLineItemCreate DataContext=&quot;{Binding}&quot; DeleteSalesOrderLineItem=&quot;DeleteSalesOrderLineItem&quot; Margin=&quot;0,3,3,0&quot; &gt;
                    &lt;OrderEntry:SalesOrderLineItemCreate.Resources&gt;
                        &lt;Style TargetType=&quot;{x:Type OrderEntry:SalesOrderLineItemCreate}&quot;&gt;
                            &lt;Style.Triggers&gt;
                                &lt;DataTrigger 
                                        Binding=&quot;{Binding RelativeSource=
                                          {
                                             RelativeSource 
                                             Mode=FindAncestor, 
                                             AncestorType={x:Type ListBoxItem}
                                          }, 
                                          Path=IsSelected
                                         }&quot; Value=&quot;True&quot;&gt;
                                    &lt;Setter Property=&quot;Background&quot; Value=&quot;LightBlue&quot; /&gt;
                                    &lt;Setter Property=&quot;Foreground&quot; Value=&quot;Black&quot; /&gt;
                                &lt;/DataTrigger&gt;
                            &lt;/Style.Triggers&gt;
                        &lt;/Style&gt;
                    &lt;/OrderEntry:SalesOrderLineItemCreate.Resources&gt;
                &lt;/OrderEntry:SalesOrderLineItemCreate&gt;
            &lt;/DataTemplate&gt;
        &lt;/ListBox.ItemTemplate&gt;
    &lt;/ListBox&gt;
    
    &lt;TextBlock Grid.Row=&quot;2&quot; 
               Text=&quot;Credit Memo&quot; 
               HorizontalAlignment=&quot;Center&quot;
               VerticalAlignment=&quot;Center&quot;
               FontSize=&quot;48&quot; Height=&quot;Auto&quot;
               FontStyle=&quot;Italic&quot;
               Foreground=&quot;Red&quot;
               Opacity=&quot;.25&quot;&gt;
        &lt;TextBlock.Style&gt;
            &lt;Style TargetType=&quot;{x:Type TextBlock}&quot;&gt;
                &lt;Style.Triggers&gt;
                    &lt;DataTrigger Binding=&quot;{Binding Path=OrderType}&quot; Value=&quot;CR&quot;&gt;
                        &lt;Setter Property=&quot;Visibility&quot; Value=&quot;Visible&quot; /&gt;
                    &lt;/DataTrigger&gt;
                    &lt;DataTrigger Binding=&quot;{Binding Path=OrderType}&quot; Value=&quot;CU&quot;&gt;
                        &lt;Setter Property=&quot;Visibility&quot; Value=&quot;Hidden&quot; /&gt;
                    &lt;/DataTrigger&gt;
                &lt;/Style.Triggers&gt;
            &lt;/Style&gt;
        &lt;/TextBlock.Style&gt;
    &lt;/TextBlock&gt;

How can I &quot;Click Through&quot; a control in WPF?

What I have is an object that has an `IsReadOnly` property. If this property is true, I would like to set the `IsEnabled` property on a Button, ( for example ), to false.

I would like to believe that I can do it as easily as `IsEnabled=&quot;{Binding Path=!IsReadOnly}&quot;` but that doesn&#39;t fly with WPF.

Am I relegated to having to go through all of the style settings? Just seems too wordy for something as simple as setting one bool to the inverse of another bool.

    &lt;Button.Style&gt;
        &lt;Style TargetType=&quot;{x:Type Button}&quot;&gt;
            &lt;Style.Triggers&gt;
                &lt;DataTrigger Binding=&quot;{Binding Path=IsReadOnly}&quot; Value=&quot;True&quot;&gt;
                    &lt;Setter Property=&quot;IsEnabled&quot; Value=&quot;False&quot; /&gt;
                &lt;/DataTrigger&gt;
                &lt;DataTrigger Binding=&quot;{Binding Path=IsReadOnly}&quot; Value=&quot;False&quot;&gt;
                    &lt;Setter Property=&quot;IsEnabled&quot; Value=&quot;True&quot; /&gt;
                &lt;/DataTrigger&gt;
            &lt;/Style.Triggers&gt;
        &lt;/Style&gt;
    &lt;/Button.Style&gt;

How to bind inverse boolean properties in WPF?

I&#39;m trying to replace an element&#39;s inline style tag value. The current element looks like this:    
  
    `&lt;tr class=&quot;row-even&quot; style=&quot;background: red none repeat scroll 0% 0%; position: relative; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;&quot; id=&quot;0000ph2009-06-10s1s02&quot;&gt;`

and I&#39;d like to remove all that style stuff so that it&#39;s styled by it&#39;s class rather than it&#39;s inline style. I&#39;ve tried delete element.style; and element.style = null; and element.style = &quot;&quot;; to no avail. My current code breaks at these statement. The whole     function looks like:  
    function unSetHighlight(index){
  
    if(index &lt; 10)
    index = &quot;000&quot; + (index);
    else if (index &lt; 100)
      index = &quot;000&quot; + (index);
      else if(index &lt; 1000)
        index = &quot;0&quot; + (index);
        if(index &gt;= 1000)
          index = index;
        
    var mainElm = document.getElementById(&#39;active_playlist&#39;);
    var elmIndex = &quot;&quot;;
  
    for(var currElm = mainElm.firstChild; currElm !== null; currElm = currElm.nextSibling){
      if(currElm.nodeType === 1){

      var elementId = currElm.getAttribute(&quot;id&quot;);

      if(elementId.match(/\b\d{4}/)){
        
        elmIndex = elementId.substr(0,4);
        
                
        if(elmIndex == index){
          var that = currElm;
          //that.style.background = position: relative;
          }
        }
      }
    }
           
    clearInterval(highlight);
    alert(&quot;cleared Interval&quot;);
    that.style.background = null;

    alert(&quot;unSet highlight called&quot;);
    }

the clearInterval works but the alert never fires and the background stays the same. Anyone see any problems? Thanks in advance...


---

	function unSetHighlight(index){  
	  alert(index);  
	  if(index &lt; 10)  
		index = &quot;000&quot; + (index);  
		else if (index &lt; 100)  
		  index = &quot;000&quot; + (index);  
		  else if(index &lt; 1000)  
			index = &quot;0&quot; + (index);  
			if(index &gt;= 1000)  
			  index = index;  
			
		var mainElm = document.getElementById(&#39;active_playlist&#39;);
		var elmIndex = &quot;&quot;;
	  
		for(var currElm = mainElm.firstChild; currElm !== null; currElm = currElm.nextSibling){
		  if(currElm.nodeType === 1){

		  var elementId = currElm.getAttribute(&quot;id&quot;);

		  if(elementId.match(/\b\d{4}/)){
			
			elmIndex = elementId.substr(0,4);
			alert(&quot;elmIndex = &quot; + elmIndex + &quot;index = &quot; + index);
			
					
			if(elmIndex === index){
			  var that = currElm;
			  alert(&quot;match found&quot;);
			  }
			}
		  }
		}
			
		clearInterval(highlight);
		alert(&quot;cleared Interval&quot;);
		that.removeAttribute(&quot;style&quot;);
		
		//that.style.position = &quot;relative&quot;;
		//reColor();
		alert(&quot;unSet highlight called&quot;);
	}

Content Type	Original Author	Original Content on Stackoverflow
Question	MrEdmundo	View Question on Stackoverflow
Solution 1 - C#	Kent Boogaart	View Answer on Stackoverflow
Solution 2 - C#	PhonicUK	View Answer on Stackoverflow

Setting Button FlatStyle in WPF

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Given a private key, is it possible to derive its public key?

Why can't enums be declared locally in a method?

Attributions