Try the following

    typeField == typeof(string)
    typeField == typeof(DateTime)

The `typeof` operator in C# will give you a `Type` object for the named type.  `Type` instances are comparable with the `==` operator so this is a good method for comparing them. 

Note: If I remember correctly, there are some cases where this breaks down when the types involved are COM interfaces which are embedded into assemblies (via NoPIA).  Doesn&#39;t sound like this is the case here.  


You can use for it the `is` [operator][1]. You can then check if object is specific type by writing:

    if (myObject is string)
    {
      DoSomething()
    }


  [1]: http://msdn.microsoft.com/en-us/library/scekt9xw%28v=VS.100%29.aspx

You can compare for exactly the same type using:

    class A {
    }
    var a = new A();
    var typeOfa = a.GetType();
    if (typeOfa == typeof(A)) {
    }

typeof returns the Type object from a given class.

But if you have a type B, that inherits from A, then this comparison is false. And you are looking for [IsAssignableFrom][1].

    class B : A {
    }
    var b = new B();
    var typeOfb = b.GetType();
    
    if (typeOfb == typeof(A)) { // false
    }

    if (typeof(A).IsAssignableFrom(typeOfb)) { // true
    }

[1]: http://msdn.microsoft.com/en-us/library/system.type.isassignablefrom.aspx

If your instance is a `Type`:

    Type typeFiled;
    if (typeField == typeof(string))
    { 
        ... 
    }

but if your instance is an `object` and not a `Type` use the `as` operator:

    object value;
    string text = value as string;
    if (text != null)
    {
        // value is a string and you can do your work here
    }

this has the advantage to convert `value` only once into the specified type.


http://msdn.microsoft.com/en-us/library/system.type.gettype.aspx

    Console.WriteLine(&quot;typeField is a {0}&quot;, typeField.GetType());

which would give you something like

    typeField is a String

    typeField is a DateTime

or

http://msdn.microsoft.com/en-us/library/58918ffs(v=vs.71).aspx

I would like to convert the values in a column of an existing data frame into row names. Is is possible to do this without exporting the data frame and then reimporting it with a `row.names = ` call?

For example I would like to convert:
    
     &gt; samp 
         names Var.1 Var.2 Var.3
     1     A     1     5     0
     2     B     2     4     1
     3     C     3     3     2
     4     D     4     2     3
     5     E     5     1     4

Into:

    &gt; samp.with.rownames 
         Var.1 Var.2 Var.3
    A     1     5     0
    B     2     4     1
    C     3     3     2
    D     4     2     3
    E     5     1     4


Convert the values in a column into row names in an existing data frame

I am simply instantiating a `UITextField` and noticing that the text doesn&#39;t center vertically. Instead, it is flush with the top of my button, which I find kind of odd since I would expect the default to center it vertically. How can I center it vertically, or is there some default setting that I am missing?



How do I vertically center UITextField Text?

Quick question: how to compare a Type type (pun not intended) with another type in C#?
I mean, I&#39;ve a `Type typeField` and I want to know if it is `System.String`, `System.DateTime`, etc., but `typeField.Equals(System.String)` doesn&#39;t work.

Any clue?

How to compare types

<p>Quick question: how to compare a Type type (pun not intended) with another type in C#?
I mean, I've a <code>Type typeField</code> and I want to know if it is <code>System.String</code>, <code>System.DateTime</code>, etc., but <code>typeField.Equals(System.String)</code> doesn't work.</p>
<p>Any clue?</p>


In my application I need to perform a series of initialization steps, these take 7-8 seconds to complete during which my UI becomes unresponsive. To resolve this I perform the initialization in a separate thread:

    public void Initialization()
    {
        Thread initThread = new Thread(new ThreadStart(InitializationThread));
        initThread.Start();
    }

    public void InitializationThread()
    {
        outputMessage(&quot;Initializing...&quot;);
        //DO INITIALIZATION
        outputMessage(&quot;Initialization Complete&quot;);
    }

I have read a few articles about the `BackgroundWorker` and how it should allow me to keep my application responsive without ever having to write a thread to perform lengthy tasks but I haven&#39;t had any success trying to implement it, could anyone tell how I would do this using the `BackgroundWorker`?

How to use WPF Background Worker

In the example below, why does the `Milliseconds` property return `0` but the `TotalMilliseconds` property return `5000`?

    // 5 seconds
    TimeSpan intervalTimespan = new TimeSpan(0, 0, 5);
    
    // returns 0
    intervalTimespan.Milliseconds;
    
    // returns 5000.0
    intervalTimespan.TotalMilliseconds

C# Timespan Milliseconds vs TotalMilliseconds

I have a .dll(not my own) that has a delegate. This delegate Callback function is:  
&quot;CallBackFN(ushort opCOde, **IntPtr payload**, uint size, uint localIP)&quot;  

How can i convert IntPtr to Byte[]? I think that payload is actually Byte[]. If it&#39;s not Byte[] and it&#39;s something else would i lose some data?   

C# how to get Byte[] from IntPtr

I&#39;m trying to pass an array (or IEnumerable) of ints from via AJAX to an MVC action and I need a little help. 

the javascript is 

    $.get(&#39;/controller/MyAction&#39;, { vals: arrayOfValues }, function (data) {...

and the controller action is 

    public ActionResult MyAction(IEnumerable&lt;int&gt; arrayOfValues )

At the moment the request is formatted as 

    controller/MyAction?_=1301503418429&amp;arrayOfValues[]=491&amp;arrayOfValues[]=368&amp;arrayOfValues[]=235&amp;arrayOfValues[]=437

So I&#39;m almost there, if I take the square brackets off I get the correct response. How should I be passing that array into my get so that the controller can recognise what it is? 

Many thanks for your help

Dave


Pass array to mvc Action via AJAX

I have a list of people&#39;s ID and their first name, and a list of people&#39;s ID and their surname. Some people don&#39;t have a first name and some don&#39;t have a surname; I&#39;d like to do a full outer join on the two lists.

So the following lists:

    ID  FirstName
    --  ---------
     1  John
     2  Sue

    ID  LastName
    --  --------
     1  Doe
     3  Smith

Should produce:

    ID  FirstName  LastName
    --  ---------  --------
     1  John       Doe
     2  Sue
     3             Smith

I&#39;m new to LINQ (so forgive me if I&#39;m being lame) and have found quite a few solutions for &#39;LINQ Outer Joins&#39; which all look quite similar, but really seem to be left outer joins.

My attempts so far go something like this:
     
    private void OuterJoinTest()
    {
        List&lt;FirstName&gt; firstNames = new List&lt;FirstName&gt;();
        firstNames.Add(new FirstName { ID = 1, Name = &quot;John&quot; });
        firstNames.Add(new FirstName { ID = 2, Name = &quot;Sue&quot; });
    
        List&lt;LastName&gt; lastNames = new List&lt;LastName&gt;();
        lastNames.Add(new LastName { ID = 1, Name = &quot;Doe&quot; });
        lastNames.Add(new LastName { ID = 3, Name = &quot;Smith&quot; });
    
        var outerJoin = from first in firstNames
            join last in lastNames
            on first.ID equals last.ID
            into temp
            from last in temp.DefaultIfEmpty()
            select new
            {
                id = first != null ? first.ID : last.ID,
                firstname = first != null ? first.Name : string.Empty,
                surname = last != null ? last.Name : string.Empty
            };
        }
    }
    
    public class FirstName
    {
        public int ID;
        
        public string Name;
    }
        
    public class LastName
    {
        public int ID;
        
        public string Name;
    }


But this returns:

    ID  FirstName  LastName
    --  ---------  --------
     1  John       Doe
     2  Sue

What am I doing wrong?

LINQ - Full Outer Join

In applications like Windows Explorer and Internet Explorer, one can grab the extended frame areas beneath the title bar and drag windows around.

For WinForms applications, forms and controls are as close to native Win32 APIs as they can get; one would simply override the `WndProc()` handler in their form, process the [`WM_NCHITTEST`](http://msdn.microsoft.com/en-us/library/ms645618%28VS.85%29.aspx) window message and trick the system into thinking a click on the frame area was really a click on the title bar by returning `HTCAPTION`. I&#39;ve done that in my own WinForms apps to delightful effect.

In WPF, I can also implement a similar `WndProc()` method and hook it to my WPF window&#39;s handle while extending the window frame into the client area, like this:

    // In MainWindow
    // For use with window frame extensions
    private IntPtr hwnd;
    private HwndSource hsource;

    private void Window_SourceInitialized(object sender, EventArgs e)
    {
        try
        {
            if ((hwnd = new WindowInteropHelper(this).Handle) == IntPtr.Zero)
            {
                throw new InvalidOperationException(&quot;Could not get window handle for the main window.&quot;);
            }
            
            hsource = HwndSource.FromHwnd(hwnd);
            hsource.AddHook(WndProc);
        
            AdjustWindowFrame();
        }
        catch (InvalidOperationException)
        {
            FallbackPaint();
        }
    }
    
    private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        switch (msg)
        {
            case DwmApiInterop.WM_NCHITTEST:
                handled = true;
                return new IntPtr(DwmApiInterop.HTCAPTION);
    
            default:
                return IntPtr.Zero;
        }
    }

The problem is that, since I&#39;m blindly setting `handled = true` and returning `HTCAPTION`, clicking *anywhere* but the window icon or the control buttons causes the window to be dragged. That is, everything highlighted in red below causes dragging. This even includes the resize handles at the sides of the window (the non-client area). My WPF controls, namely the text boxes and the tab control, also stop receiving clicks as a result:

![](http://i.stack.imgur.com/7J27H.png)

What I want is for only

1. the title bar, and
2. the regions of the client area...
3. ... that aren&#39;t occupied by my controls

to be draggable. That is, I only want these red regions to be draggable (client area + title bar):

![](http://i.stack.imgur.com/dhOoX.png)

How do I modify my `WndProc()` method and the rest of my window&#39;s XAML/code-behind, to determine which areas should return `HTCAPTION` and which shouldn&#39;t? I&#39;m thinking something along the lines of using `Point`s to check the location of the click against the locations of my controls, but I&#39;m not sure how to go about it in WPF land.

**EDIT [4/24]:** one simple way about it is to have an invisible control, or even the window itself, respond to `MouseLeftButtonDown` by invoking `DragMove()` on the window (see [Ross&#39;s answer](https://stackoverflow.com/questions/5493149/how-do-i-make-a-wpf-window-movable-by-dragging-the-extended-window-frame/5773515#5773515)). The problem is that for some reason `DragMove()` doesn&#39;t work if the window is maximized, so it doesn&#39;t play nice with Windows 7 Aero Snap. Since I&#39;m going for Windows 7 integration, it&#39;s not an acceptable solution in my case.

How do I make a WPF window movable by dragging the extended window frame?

I&#39;m calling this web service within code and I would like to see the XML, but I can&#39;t find a property that exposes it.



How do I get the XML SOAP request of an WCF Web service request?

# Short version:

Is it enough to wrap the argument in quotes and escape `\` and `&quot;` ?

# Code version

I want to pass the command line arguments `string[] args` to another process using ProcessInfo.Arguments.

    ProcessStartInfo info = new ProcessStartInfo();
    info.FileName = Application.ExecutablePath;
    info.UseShellExecute = true;
    info.Verb = &quot;runas&quot;; // Provides Run as Administrator
    info.Arguments = EscapeCommandLineArguments(args);
    Process.Start(info);

The problem is that I get the arguments as an array and must merge them into a single string. An arguments could be crafted to trick my program.

    my.exe &quot;C:\Documents and Settings\MyPath \&quot; --kill-all-humans \&quot; except fry&quot;

According to [this answer][1] I have created the following function to escape a single argument, but I might have missed something.

    private static string EscapeCommandLineArguments(string[] args)
    {
        string arguments = &quot;&quot;;
        foreach (string arg in args)
        {
            arguments += &quot; \&quot;&quot; +
                arg.Replace (&quot;\\&quot;, &quot;\\\\&quot;).Replace(&quot;\&quot;&quot;, &quot;\\\&quot;&quot;) +
                &quot;\&quot;&quot;;
        }
        return arguments;
    }

Is this good enough or is there any framework function for this?

  [1]: https://stackoverflow.com/questions/653563/passing-command-line-arguments-in-c/653664#653664

Content Type	Original Author	Original Content on Stackoverflow
Question	Archedius	View Question on Stackoverflow
Solution 1 - C#	JaredPar	View Answer on Stackoverflow
Solution 2 - C#	Rafal Spacjer	View Answer on Stackoverflow
Solution 3 - C#	GvS	View Answer on Stackoverflow
Solution 4 - C#	Syntony	View Answer on Stackoverflow
Solution 5 - C#	dotalchemy	View Answer on Stackoverflow

How to compare types

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Solution 5 - C#

How do I vertically center UITextField Text?

Convert the values in a column into row names in an existing data frame

Attributions