Use the constructor that allows you to specify the year, month, day, hours, minutes, and seconds:

    var dateNow = DateTime.Now;
    var date = new DateTime(dateNow.Year, dateNow.Month, dateNow.Day, 4, 5, 6);

you can&#39;t change the DateTime object, it&#39;s immutable. However, you can set it to a new value, for example:

    var newDate = oldDate.Date + new TimeSpan(11, 30, 55);



    date = new DateTime(date.year, date.month, date.day, HH, MM, SS);

I&#39;m not sure exactly what you&#39;re trying to do but
 you can set the date/time to exactly what you want in a number of ways...

You can specify 12/25/2010 4:58 PM by using

    DateTime myDate = Convert.ToDateTime(&quot;2010-12-25 16:58:00&quot;);

OR if you have an existing datetime construct , say 12/25/2010 (and any random time) and you want to set it to 12/25/2010 4:58 PM, you could do so like this:

    DateTime myDate = ExistingTime.Date.AddHours(16).AddMinutes(58);

The `ExistingTime.Date` will be 12/25 at midnight, and you just add hours and minutes to get it to the time you want.









It isn&#39;t possible as DateTime is immutable. The same discussion is available here: https://stackoverflow.com/questions/1859248/how-to-change-time-in-datetime

I am trying to convert `1200.00` to `decimal`, but `Decimal.Parse()` removes `.00`. I&#39;ve tried some different methods, but it always removes `.00`, except when I supply a fraction different than 0.

    string value = &quot;1200.00&quot;;

### Method 1  ###

     var convertDecimal = Decimal.Parse(value ,  NumberStyles.AllowThousands
           | NumberStyles.AllowDecimalPoint | NumberStyles.AllowCurrencySymbol);

### Method 2  ###

     var convertDecimal = Convert.ToDecimal(value);


### Method 3  ###

    var convertDecimal = Decimal.Parse(value,
           NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture);

How can I convert a `string` containing `1200.00` to a `decimal` containing `1200.00`?

Convert string to decimal, keeping fractions

Is there something in javascript/jQuery to check whether variable is set/available or not? In php, we use `isset($variable)` to check something like this.

thanks.

is there something like isset of php in javascript/jQuery?

I have a DateTime variable:

    DateTime date = DateTime.Now;

I want to change the time part of a DateTime variable. But when I tried to access time part (hh:mm:ss) these fields are readonly.

Can&#39;t I set these properties?





How to set only time part of a DateTime variable in C#

I have a DateTime variable:
<pre><code class="hljs language-ini">DateTime date = DateTime.Now;
</code></pre>
I want to change the time part of a DateTime variable. But when I tried to access time part (hh:mm:ss) these fields are readonly.
Can't I set these properties?

Interviewer asked me about this today ...is there an answer ?

How to force garbage collector to run?

I&#39;m looking for a quick, easy and reliable way of getting the browser&#39;s **HTTP Referrer** in **ASP.Net** (**C#**).  I know the HTTP Referrer itself is unreliable, but I do want a reliable way of getting the referrer if it *is* present.

Getting the HTTP Referrer in ASP.NET

I have an array defined:

    int [,] ary;
    // ...
    int nArea = ary.Length; // x*y or total area

This is all well and good, but I need to know how wide this array is in the `x` and `y` dimensions individually. Namely, `ary.Length` might return 12 - but does that mean the array is 4 high and 3 wide, or 6 high and 2 wide?

How can I retrieve this information?

How do you get the width and height of a multi-dimensional array?

This is probably a pretty obvious question, but how would I go about creating a `List` that has multiple parameters without creating a class.

Example:

    var list = new List&lt;string, int&gt;();

    list.Add(&quot;hello&quot;, 1);

I normally would use a class like so:

    public class MyClass
    {
        public String myString {get; set;}
        public Int32 myInt32 {get; set;}
    }

then create my list by doing:

    var list = new List&lt;MyClass&gt;();
    list.Add(new MyClass { myString = &quot;hello&quot;, myInt32 = 1 });

Multiple parameters in a List. How to create without a class?

Whilst playing around in an open source project, my attempt to _ToString_ a DateTime object was thwarted by the compiler. When I jumped to the definition, I saw this:

    public DateTime? timestamp;

Might someone please enlighten me on what this is called and why it might be useful?

What does one question mark following a variable declaration mean?

What is the difference between OpenWrap and NuGet. And what you prefer ?

OpenWrap vs NuGet

C#&#39;s exception class has a source property which is set to the name of the assembly by default.  
Is there another way to get this exact string (without parsing a different string)?  

I have tried the following:

    catch(Exception e)
    {
        string str = e.Source;         
        //&quot;EPA&quot; - what I want               
        str = System.Reflection.Assembly.GetExecutingAssembly().FullName;
        //&quot;EPA, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null&quot;
        str = typeof(Program).FullName;
        //&quot;EPA.Program&quot;
        str = typeof(Program).Assembly.FullName;
        //&quot;EPA, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null&quot;
        str = typeof(Program).Assembly.ToString();
        //&quot;EPA, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null&quot;
        str = typeof(Program).AssemblyQualifiedName;
        //&quot;EPA.Program, EPA, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null&quot;
    }

Getting assembly name

I&#39;m getting this error when I try to start a windows service I&#39;ve created in C#:

![alt text][1]

My Code so far:

    private ServiceHost host = null;

    public RightAccessHost()
    {
        InitializeComponent();
    }

    protected override void OnStart(string[] args)
    {
        host = new ServiceHost(typeof(RightAccessWcf));
        host.Open();
    }

    protected override void OnStop()
    {
        if (host != null)
            host.Close();
        host = null;
    }

##Update #1
I solved the issue above by granting permissions to the account _NETWORK SERVICE_ but now I have an another problem:

![alt text][2]

##Update #2

&gt;Service cannot be started. System.InvalidOperationException: Service &#39;RightAccessManagementWcf.RightAccessWcf&#39; has zero application (non-infrastructure) endpoints. This might be because no configuration file was found for your application, or because no service element matching the service name could be found in the configuration file, or because no endpoints were defined in the service element.
   at System.ServiceModel.Description.DispatcherBuilder.EnsureThereAreNonMexEndpoints(ServiceDescription description)
   at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost)
   at System.ServiceModel.ServiceHostBase.InitializeRuntime()
   at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout)
   at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
   at RightAccessHosting.RightAccessHost.OnStart(String[] args) in C:\Users....

  [1]: http://i.stack.imgur.com/53rgc.png
  [2]: http://i.stack.imgur.com/Fp6Zq.png

Error 5 : Access Denied when starting windows service

How can I clone a DateTime object in C#?

I have a logging table that will contain millions of writes for statistical reasons. All the columns are int foreign keys. I am also going to add a timestamp column for each row. Given that DATETIME takes 8bits - I will be using `int(10) unsigned` to cut the storage space (and index on that column) in half. 

However, I&#39;m wondering when this column would no longer work. At 3:14:07AM on 19th January 2038 the value 9,999,999,999 will be a problem for UNIX timestamps - but an unsigned int in MySQL only holds up to 4,294,967,295 and the timestamp 4294967295 is showing an invalid number in my PHP application.

**So what does this mean? Is the end of the storing int timestamps in MySQL going to be sometime in 2021 since it can&#39;t make it all the way to 9999999999?**

**Answer:** 

 1. 2147483647 is 2038 (not 9999999999) so there is no problem. 
 2. `unsigned` isn&#39;t needed since 2147483647 fits fine in a signed MySQL int.

How should unix timestamps be stored in int columns?

**Expected Input:**

    getDatesFromRange( &#39;2010-10-01&#39;, &#39;2010-10-05&#39; );

**Expected Output:**

    Array( &#39;2010-10-01&#39;, &#39;2010-10-02&#39;, &#39;2010-10-03&#39;, &#39;2010-10-04&#39;, &#39;2010-10-05&#39; )

PHP: Return all dates between two dates in an array

How do you create a DateTime from timestamp in versions less than &lt; 5.3?

In 5.3 it would be:

    $date = DateTime::createFromFormat(&#39;U&#39;, $timeStamp);

The DateTime constructor wants a string, but this didn&#39;t work for me

    $date = new DateTime(&quot;@$timeStamp&quot;);



Creating DateTime from timestamp in PHP &lt; 5.3

What is the difference between a `DateTime` and a `DateTimeOffset` and when should one be used?

---

Currently, we have a standard way of dealing with .NET `DateTime`s in a TimeZone-aware way: Whenever we produce a `DateTime` we do it in UTC (e.g. using `DateTime.UtcNow`), and whenever we display one, we convert back from UTC to the user&#39;s local time. 

That works fine, but I&#39;ve been reading about `DateTimeOffset` and how it captures the local and UTC time in the object itself.

Content Type	Original Author	Original Content on Stackoverflow
Question	Vaibhav Jain	View Question on Stackoverflow
Solution 1 - C#	Ahmad Mageed	View Answer on Stackoverflow
Solution 2 - C#	Daniel Perez	View Answer on Stackoverflow
Solution 3 - C#	Rhapsody	View Answer on Stackoverflow
Solution 4 - C#	David	View Answer on Stackoverflow
Solution 5 - C#	cspolton	View Answer on Stackoverflow

How to set only time part of a DateTime variable in C#

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Solution 5 - C#

is there something like isset of php in javascript/jQuery?

Convert string to decimal, keeping fractions

Attributions