    DateTime.ParseExact(input,&quot;yyyyMMdd HH:mm&quot;,null);

assuming you meant to say that minutes followed the hours, not seconds - your example is a little confusing. 

The [ParseExact documentation][1] details other overloads, in case you want to have the parse automatically convert to Universal Time or something like that.

As @[Joel Coehoorn](https://stackoverflow.com/users/3043/joel-coehoorn) mentions, there&#39;s also the option of using [TryParseExact][2], which will return a Boolean value indicating success or failure of the operation - I&#39;m still on .Net 1.1, so I often forget this one.

If you need to parse other formats, you can check out the [Standard DateTime Format Strings][3].


  [1]: http://msdn.microsoft.com/en-us/library/system.datetime.parseexact(VS.80).aspx
  [2]: http://msdn.microsoft.com/en-us/library/system.datetime.tryparseexact(VS.80).aspx
  [3]: https://docs.microsoft.com/en-us/dotnet/standard/base-types/standard-date-and-time-format-strings

Thanks for the tip, i used this to get my date &quot;20071122&quot; parsed, I needed to add datetimestyles, I used none and it worked:

    DateTime dt = DateTime.MinValue;

    DateTime.TryParseExact(&quot;20071122&quot;, &quot;yyyyMMdd&quot;, null,System.Globalization.DateTimeStyles.None, out dt);

Do you put unit tests in the same project for convenience or do you put them in a separate assembly?

If you put them in a separate assembly like we do, we end up with a number of extra projects in the solution.  It&#39;s great for unit testing while coding but how do you release the application without all of these extra assemblies?


Do you put unit tests in same project or another project?

Is there an easy way within C# to check to see if a DateTime instance has been assigned a value or not?



Checking to see if a DateTime variable has had a value assigned

I have a datetime coming back from an XML file in the format:

&gt; 20080916 11:02

as in 

&gt; yyyymm hh:ss

How can i get the datetime.parse function to pick up on this? Ie parse it without erroring?
Cheers

datetime.parse and making it work with a specific format

I have a datetime coming back from an XML file in the format:
> 20080916 11:02
as in
> yyyymm hh:ss
How can i get the datetime.parse function to pick up on this? Ie parse it without erroring?
Cheers

What is the best way to get the Max value from a LINQ query that may return no rows? If I just do

    Dim x = (From y In context.MyTable _
             Where y.MyField = value _
             Select y.MyCounter).Max

I get an error when the query returns no rows. I could do

    Dim x = (From y In context.MyTable _
             Where y.MyField = value _
             Select y.MyCounter _
             Order By MyCounter Descending).FirstOrDefault

but that feels a little obtuse for such a simple request. Am I missing a better way to do it?

UPDATE: Here&#39;s the back story: I&#39;m trying to retrieve the next eligibility counter from a child table (legacy system, don&#39;t get me started...). The first eligibility row for each patient is always 1, the second is 2, etc. (obviously this is not the primary key of the child table). So, I&#39;m selecting the max existing counter value for a patient, and then adding 1 to it to create a new row. When there are no existing child values, I need the query to return 0 (so adding 1 will give me a counter value of 1). Note that I don&#39;t want to rely on the raw count of child rows, in case the legacy app introduces gaps in the counter values (possible). My bad for trying to make the question too generic.

Max or Default?

I have the following code in WCF service to throw a custom fault based on certain situations.  I am getting a &quot;The creator of this fault did not specify a Reason&quot; exception.  What am I doing wrong?

    //source code
    if(!DidItPass)
    {
        InvalidRoutingCodeFault fault = new InvalidRoutingCodeFault(&quot;Invalid Routing Code - No Approval Started&quot;);
        throw new FaultException&lt;InvalidRoutingCodeFault&gt;(fault);
    }
    
    //operation contract
    [OperationContract]
    [FaultContract(typeof(InvalidRoutingCodeFault))]
    bool MyMethod();
    
    //data contract
    [DataContract(Namespace=&quot;http://myuri.org/Simple&quot;)]
    public class InvalidRoutingCodeFault
    {
        private string m_ErrorMessage = string.Empty;
            
        public InvalidRoutingCodeFault(string message)
        {
            this.m_ErrorMessage = message;
        }
    
        [DataMember]
        public string ErrorMessage
        {
            get { return this.m_ErrorMessage; }
            set { this.m_ErrorMessage = value; }
        }
    }

&quot;The creator of this fault did not specify a Reason&quot; Exception

I want to make a simple server application where people can connect using a browser-based client (which I will make later) to watch streaming video. And I want to use C#.

What do I need to capture video or rapid images through a webcam and send them over the network?


How can I stream webcam video with C#?

Suppose I have this interface

    public interface IFoo
    {
        ///&lt;summary&gt;
        /// Foo method
        ///&lt;/summary&gt;
        void Foo();

        ///&lt;summary&gt;
        /// Bar method
        ///&lt;/summary&gt;
        void Bar();

        ///&lt;summary&gt;
        /// Situation normal
        ///&lt;/summary&gt;
        void Snafu();
    }

And this class

    public class Foo : IFoo
    {
        public void Foo() { ... }
        public void Bar() { ... }
        public void Snafu() { ... }
    }

Is there a way, or is there a tool that can let me automatically put in the comments of each member in a base class or interface?

Because I hate re-writing the same comments for each derived sub-class!



Inheriting comments from an interface in an implementing class?

To do DataBinding of the `Document` in a WPF `RichtextBox`, I saw 2 solutions so far, which are to derive from the `RichtextBox` and add a `DependencyProperty`, and also the solution with a &quot;proxy&quot;.

Neither the first or the second are satisfactory. Does somebody know another solution, or instead, a commercial RTF control which is capable of **DataBinding**? The normal `TextBox` is not an alternative, since we need text formatting.

Any idea?

Richtextbox wpf binding

I&#39;m matching ASP.Net generated elements by ID name, but I have some elements which may render as text boxes or labels depending on the page context. I need to figure out whether the match is to a textbox or label in order to know whether to get the contents by val() or by html().

    $(&quot;[id$=&quot; + endOfIdToMatch + &quot;]&quot;).each(function () {
        //determine whether $(this) is a textbox or label
        //do stuff
    });

I found a solution that doesn&#39;t work, it just returns &quot;undefined&quot;:

    $(&quot;[id$=&quot; + endOfIdToMatch + &quot;]&quot;).each(function () {
        alert($(this).tagName);
    });

What am I missing?

How can I determine the element type of a matched element in jQuery?

I have a custom error page set up for my application:

    &lt;customErrors mode=&quot;On&quot; defaultRedirect=&quot;~/errors/GeneralError.aspx&quot;
    /&gt;

In Global.asax, Application_Error(), the following code works to get the exception details:

      Exception ex = Server.GetLastError();
      if (ex != null)
        {
            if (ex.GetBaseException() != null)
                ex = ex.GetBaseException();
        }


By the time I get to my error page (~/errors/GeneralError.aspx.cs), Server.GetLastError() is null

Is there any way I can get the exception details on the Error Page, rather than in Global.asax.cs ?

ASP.NET 3.5 on Vista/IIS7

ASP.NET custom error page - Server.GetLastError() is null

This question relates to an ASP.NET website, originally developed in VS 2005 and now in VS 2008.

This website uses two unmanaged external DLLs which are not .NET and I do not have the source code to compile them and have to use them as is.

This website runs fine from within Visual Studio, locating and accessing these external DLLs correctly. However, when the website is published on a webserver (runnning IIS6 and ASP.NET 2.0) rather than the development PC it cannot locate and access these external DLLs, and I get the following error:

`Unable to load DLL &#39;XYZ.dll&#39;: The specified module could not be found. (Exception from HRESULT: 0x8007007E)`

The external DLLs are located in the bin directory of the website, along with the managed DLLs that wrap them and all the other DLLs for the website.

Searching this problem reveals that many other people seem to have the same problem accessing external non.NET DLLs from ASP.NET websites, but I haven&#39;t found a solution that works.
 
I have tried the following:

  * Running DEPENDS to check the dependencies to establish that the first three
    are in System32 directory in the path, the last is in the .NET 2
    framework.
  * I put the two DLLs and their dependencies in
    System32 and rebooted the server, but website still
    couldn&#39;t load these external DLLs.
  * Gave full rights to ASPNET, IIS_WPG and IUSR (for that server) to
    the website bin directory and rebooted, but website still couldn&#39;t
    load these external DLLs.
  * Added the external DLLs as existing items to the projects and set
    their &quot;Copy to Output&quot; property to &quot;Copy Always&quot;, and website
    still can&#39;t find the DLLs.
  * Also set their &quot;Build Action&quot; property to &quot;Embedded resource&quot; and
    website still can&#39;t find the DLLs.

Any assistance with this problem would be greatly appreciated!

Unmanaged DLLs fail to load on ASP.NET server

I redirect the user to the login page when user click log out however I don&#39;t think it clears any application or session because all the data persisted when the user logs back in.

Currently the login page has a login control and the code behind on the page is only wired up the login Authenticate.

Can someone direct me to a good tutorial or article about handling log in and out of ASP.NET web sites?

How to clear out session on log out

After trying to setup my site for Google Webmaster Tools I found that my Custom ASP.NET 404 page was not returning the 404 status code. It displayed the correct custom page and told the browser that everything is OK. This is consider a soft 404 or false 404. Google doesn&#39;t like this. So I found many articles on the issue but the solution I want didn&#39;t seem to work.

The solution I want to work is adding the following two lines to the code behind Page_Load method of the custom 404 page.

    Response.Status = &quot;404 Not Found&quot;;
    Response.StatusCode = 404;

This doesn&#39;t work. The page still returns 200 OK. I found however that if I hard code the following code into the design code it will work properly.

    
    &lt;asp:Content ID=&quot;ContentMain&quot; ContentPlaceHolderID=&quot;ContentPlaceHolderMaster&quot; runat=&quot;server&quot;&gt;

	&lt;%
		Response.Status = &quot;404 Not Found&quot;;
		Response.StatusCode = 404;
	%&gt;

     ... Much more code ...

    &lt;/asp:content&gt;

The page is using a master page. And I am configuring custom error pages in my web.config. I would really rather use the code behind option but I can&#39;t seem to make it work without putting a the hack inline code in the design / layout.




ASP.NET Custom 404 Returning 200 OK Instead of 404 Not Found

I&#39;m looking for a way in .NET (2.0, C# in particular) for source code to trigger a debugging break as if a breakpoint was set at that point, without having to remember to set a specific breakpoint there in the debugger, and without interfering with production runtime.

Our code needs to swallow exceptions in production so we don&#39;t disrupt a client application that links to us, but I&#39;m trying to set it up so that such errors will pop up to be analyzed if it happens to be running in a debugger, and otherwise will be safely ignored.

My attempt to use &lt;code&gt;Debug.Assert(false)&lt;/code&gt; has been less than ideal, and I assume that &lt;code&gt;Debug.Fail()&lt;/code&gt; would behave the same way.  It should theoretically have no effect in production, and it does successfully stop when debugging, but by design there is (as far as I can tell) no way to continue execution if you want to ignore that error, like you could with an actual breakpoint, and like it would do in production where we swallow the error.  It also apparently breaks evaluation of variable state because the debugger actually stops down in native system code and not in ours, so it&#39;s debugging help is limited.  (Maybe I&#39;m missing some way of getting back into things to look at the variables and so on where it happened. ???)

I was hoping for something like &lt;code&gt;Debug.Break()&lt;/code&gt;, but it doesn&#39;t seem to exist (unless maybe in a later version of .NET?), and no other &lt;code&gt;Debug&lt;/code&gt; methods seem applicable, either.

**Update:** While ctacke&#39;s answer is the best match for what I was looking for, I have since also discovered a trick with Debug.Assert()--when running in the debugger--Pause the debugger, go to the code for the Debug.Assert call pending (highlighted in green because it is down in the framework code) and hit Step-Out (shift-F11), then hit Ignore in the assert dialog box.  This will leave the debugger paused upon the return of the assert (and able to continue execution as if it hadn&#39;t occurred, because it was ignored).  There may be other ways to do much the same thing (does hitting Retry do this more directly?), but this way was intuitive.

Can .NET source code hard-code a debugging breakpoint?

Regardless of what the user&#39;s local time zone is set to, using C# (.NET 2.0) I need to determine the time (DateTime object) in the Eastern time zone.

I know about these methods but there doesn&#39;t seem to be an obvious way to get a DateTime object for a different time zone than what the user is in.

     DateTime.Now
     DateTime.UtcNow
     TimeZone.CurrentTimeZone

Of course, the solution needs to be daylight savings time aware.



Get DateTime For Another Time Zone Regardless of Local Time Zone

I need to access the assembly of my project in C# .NET 2.0.

I can see the GUID in the &#39;Assembly Information&#39; dialog in under project properties, and at the moment I have just copied it to a const in the code. The GUID will never change, so this is not that bad of a solution, but it would be nice to access it directly. Is there a way to do this?


How do I programmatically get the GUID of an application in .NET 2.0

This works just fine:

        protected void txtTest_Load(object sender, EventArgs e)
        {
            if (sender is TextBox) {...}

        }

Is there a way to check if sender is NOT a TextBox, some kind of an equivalent of != for &quot;is&quot;?

Please, don&#39;t suggest moving the logic to ELSE{} :)

Check if object is NOT of type (!= equivalent for &quot;IS&quot;) - C#

I&#39;m trying to customize the location of the `user.config` file. Currently it&#39;s stored with a hash and version number 

    %AppData%\[CompanyName]\[ExeName]_Url_[some_hash]\[Version]\

I want to it be agnostic to the version of the application

    %AppData%\[CompanyName]\[ProductName]\

**Can this be done and how? What are the implications?** Will the user lose their settings from the previous version after upgrading?

Content Type	Original Author	Original Content on Stackoverflow
Question	anonym0use	View Question on Stackoverflow
Solution 1 - C#	Blair Conrad	View Answer on Stackoverflow
Solution 2 - C#	bert	View Answer on Stackoverflow

datetime.parse and making it work with a specific format

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Checking to see if a DateTime variable has had a value assigned

Do you put unit tests in same project or another project?

Attributions