You are looking for

    MyList.Select(x=&gt;x.Name).ToArray();

Since `Select` is an Extension method make sure to add that namespace by adding a 

 `using System.Linq` 

to your file - then it will show up with Intellisense.

&gt;I am fairly sure that Linq can do this.... but MyList does not have a select method on it (which is what I would have used).

Yes, LINQ can do this. It&#39;s simply:

    MyList.Select(x =&gt; x.Name).ToArray();

Most likely the issue is that you either don&#39;t have a reference to `System.Core`, or you are missing an `using` directive for `System.Linq`.

This should also work:

    AggregateValues(&quot;hello&quot;, MyList.ConvertAll(c =&gt; c.Name).ToArray())

For everyone who is stuck with .NET 2.0, like me, try the following way (applicable to the example in the OP):

    ConfigItemList.ConvertAll&lt;string&gt;(delegate (ConfigItemType ci) 
    { 
       return ci.Name; 
    }).ToArray();

where *ConfigItemList* is your list variable.

I&#39;m writing this in mere desperation :) I&#39;ve been assigned to make a standalone barcode scanner (as a proof of concept) to an Android 1.6 phone.

For this i&#39;ve discovered the ZXing library.

I&#39;ve googled, read related topics here on StackOverflow used common sence and so forth. Nothing seemed to have helped, and i just can&#39;t punch a hole on this mentale blockade :/

I know it to be possible, to use the lib, and create your own standalone barcode scanner. I&#39;ve read that using the &quot;Barcode Scanner&quot; provided by the Zxing folks, is by far the easiest solution (via Intent). Unfortunately this is not an option, and a standalone app is desired.

So to sum up my problem :

1. How to integrate ZXing source lib into my Android Code project through Eclipse?
2. When integrated ... how to make use of the lib, to &quot;load&quot; the scanning function?
3. A step to step guide is almost prefered because i just started working in Eclipse.

I&#39;ve tried to make my code project dependant of the Android folder from the ZXing source folder. When i do so, a handfull errors emerge, mostly concerning &#39;org.apache&#39; (??)

I just can&#39;t figure it out ... so a few hints would be most helpfull.

In advance, thank you :)

Integrating the ZXing library directly into my Android application

Is it easy/possible to do a simple `include(&#39;./path/to/file&#39;)` type of command in node.js?  

All I want to do is have access to local variables and run a script.  How do people typically organize node.js projects that are bigger than a simple hello world?  (A fully functional  dynamic website)

For example I&#39;d like to have directories like:

`/models`

`/views`

... etc

Load and execute external js file in node.js with access to local variables?

Say I have the following class:

    public class ConfigItemType
    {
        public string Name { get; set; }
        public double SomeOtherThing { get; set; }
    }

and then I make a list of the following classes (`List&lt;ConfigItemType&gt; MyList`)

Now I have a method with the following signature:

    void AggregateValues(string someUnrelatedValue, params string[] listGoesHere)

How can I fit `MyList` in to the `listGoesHere` using the value in `ConfigItemType.Name` as the params string array?

I am fairly sure that Linq can do this.... but `MyList` does not have a `select` method on it (which is what I would have used).

Convert a list of objects to an array of one of the object&#39;s properties

Say I have the following class:
<pre><code class="hljs language-csharp">public class ConfigItemType
{
 public string Name { get; set; }
 public double SomeOtherThing { get; set; }
}
</code></pre>
and then I make a list of the following classes (<code>List&#x3C;ConfigItemType> MyList</code>)
Now I have a method with the following signature:
<pre><code class="hljs language-csharp">void AggregateValues(string someUnrelatedValue, params string[] listGoesHere)
</code></pre>
How can I fit <code>MyList</code> in to the <code>listGoesHere</code> using the value in <code>ConfigItemType.Name</code> as the params string array?
I am fairly sure that Linq can do this.... but <code>MyList</code> does not have a <code>select</code> method on it (which is what I would have used).

I have a folder which contains many files. Is there any easy way to get the file names in the directory sorted by their creation date/time?

If I use `Directory.GetFiles()`, it returns the files sorted by their file name.

Getting files by creation date in .NET

I am trying to build a small application in C# which should start/stop an IIS Express worker process. For this purpose I want to use the official &quot;IIS Express API&quot; which is documented on MSDN: http://msdn.microsoft.com/en-us/library/gg418415.aspx

As far as I understand, the API is based (only) on COM interfaces. To use this COM interfaces I&#39;ve added a reference to the COM library in VS2010 via Add Reference -&gt; COM -&gt; &quot;IIS Installed Versions Manager Interface&quot;:

![][1]


So far so good, but what&#39;s next? There is an `IIISExprProcessUtility` interface available which includes the the two &quot;methods&quot; to start/stop an IIS process. Do I have to write a class which implements this interface?

    public class test : IISVersionManagerLibrary.IIISExprProcessUtility
    {
        public string ConstructCommandLine(string bstrSite, string bstrApplication, string bstrApplicationPool, string bstrConfigPath)
        {
            throw new NotImplementedException();
        }

        public uint GetRunningProcessForSite(string bstrSite, string bstrApplication, string bstrApplicationPool, string bstrConfigPath)
        {
            throw new NotImplementedException();
        }

        public void StopProcess(uint dwPid)
        {
            throw new NotImplementedException();
        }
    } 

As you can see, I&#39;m not a professional developer. Can someone point me in the right direction.
Any help is greatly appreciated.

**Update 1:**
According to the suggestions I&#39;ve tried the following code which unfortunately doesn&#39;t work:

![alt text][2]
Ok, it can be instantiated but I cannot see how to use this object...

![alt text][3]

![alt text][4]

    IISVersionManagerLibrary.IIISExpressProcessUtility test3 = (IISVersionManagerLibrary.IIISExpressProcessUtility) Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid(&quot;5A081F08-E4FA-45CC-A8EA-5C8A7B51727C&quot;)));
    
    Exception: Retrieving the COM class factory for component with CLSID {5A081F08-E4FA-45CC-A8EA-5C8A7B51727C} failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).



  [1]: http://i.stack.imgur.com/x1el0.png
  [2]: http://i.stack.imgur.com/x70Ck.png
  [3]: http://i.stack.imgur.com/PEeMZ.png
  [4]: http://i.stack.imgur.com/Qlpqj.png

Starting and stopping IIS Express programmatically 

How can I restart a WPF Application?
In windows Forms I used

`System.Windows.Forms.Application.Restart();`

How to do it in WPF?

How do I restart a WPF application?

At `run-time`, inside `base class`, how to find the current child class name ?

How to find the child class name from base class?

I have an enum like:

    public enum Blah
    {
        RED = 2,
        BLUE = 4,
        GREEN = 8,
        YELLOW = 16
    }
    
    Blah colors = Blah.RED | Blah.BLUE | Blah.YELLOW;

How could I remove the color blue from the variable colors?

How to remove an item for a OR&#39;d enum?

I have a data structure like

    public DespatchGroup(DateTime despatchDate, List&lt;Products&gt; products);

And I am trying to do...

    var list = new List&lt;DespatchGroup&gt;();

    foreach (var group in dc.GetDespatchedProducts().GroupBy(i =&gt; i.DespatchDate))
    {
        // group.Values is not correct... how do I write this?
        list.Add(new DespatchGroup(group.Key, group.Values);
    }

I&#39;m obviously not understanding `IGrouping` as I can&#39;t see how to actually get to the data records within the group!

Get &quot;Value&quot; property in IGrouping

I am wondering what the difference between IQueryable, List, IEnumerator is and when I should use each one?

For instance when using Linq to SQL I would do something like this:

    public List&lt;User&gt; GetUsers()
    {
       return db.User.where(/* some query here */).ToList();
    }

Now I am wondering if I should be using IQueryable instead. I am unsure of the advantages of using it over the list.

Differences between IQueryable, List, IEnumerator?

I am using Entity Framework and occasionally i will get this error. 

    EntityCommandExecutionException
    {&quot;There is already an open DataReader associated with this Command which must be closed first.&quot;}
       at System.Data.EntityClient.EntityCommandDefinition.ExecuteStoreCommands...

Even though i am not doing any manual connection management. 

this error happens intermittently.

code that triggers the error (shortened for ease of reading):

            if (critera.FromDate &gt; x) {
                t= _tEntitites.T.Where(predicate).ToList();
            }
            else {
                t= new List&lt;T&gt;(_tEntitites.TA.Where(historicPredicate).ToList());
            }


using Dispose pattern in order to open new connection every time.


    using (_tEntitites = new TEntities(GetEntityConnection())) {
    
        if (critera.FromDate &gt; x) {
            t= _tEntitites.T.Where(predicate).ToList();
        }
        else {
            t= new List&lt;T&gt;(_tEntitites.TA.Where(historicPredicate).ToList());
        }
    
    }

still problematic 

why wouldn&#39;t EF reuse a connection if it is already open. 

Entity Framework: There is already an open DataReader associated with this Command

I have a LINQ query:

    var list = from t in ctn.Items
               where t.DeliverySelection == true &amp;&amp; t.Delivery.SentForDelivery == null
               orderby t.Delivery.SubmissionDate
               select t;

How can I modify this query to select just five results from the database?


LINQ query to select top five

I am looking to perform a query on an example list of objects

    Date     Username

    01/01/2011 james
    01/01/2011 jamie
    01/01/2011 alex
    01/01/2011 james
    02/01/2011 matt
    02/01/2011 jamie
    02/01/2011 alex
    02/01/2011 james
    02/01/2011 james
    02/01/2011 lucy
    02/01/2011 alex
    03/01/2011 james
    03/01/2011 bob
    03/01/2011 bob
    03/01/2011 james
    03/01/2011 james
    04/01/2011 alex
    04/01/2011 alex
    04/01/2011 alex


I want to use linq to query the list of dates with the number of unique user logins.

For example:

    01/01/2011 - 3
    02/01/2011 - 5
    03/01/2011 - 2
    04/01/2011 - 1

I have tried as tested a number of linq statements but none of these are giving me the desired result. The closest I have got is giving me the distinct dates but with a count of all the users.

Any help would be greatly appreciated.


Content Type	Original Author	Original Content on Stackoverflow
Question	Vaccano	View Question on Stackoverflow
Solution 1 - C#	BrokenGlass	View Answer on Stackoverflow
Solution 2 - C#	jason	View Answer on Stackoverflow
Solution 3 - C#	Shadow Wizard Says No More War	View Answer on Stackoverflow
Solution 4 - C#	Spyros	View Answer on Stackoverflow

Convert a list of objects to an array of one of the object's properties

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Load and execute external js file in node.js with access to local variables?

Integrating the ZXing library directly into my Android application

Attributions