All technologies, only pure source code
.NET (dotnet) is a developer platform made up of tools, programming languages, and libraries for building many different types of applications.
So, there are various implementations of .NET (dotnet). Each implementation allows .NET code to execute in different places—Linux, macOS, Windows, iOS, Android, and many more. This framework has two main versions:
Then, Xamarin/Mono is a .NET (dotnet) implementation for running apps on all the major mobile operating systems, including iOS and Android.
The .NET Standard is a formal specification of the APIs that are common across .NET implementations. This allows the same code and libraries to run on different implementations.
Therefore, the two major components of .NET (dotnet) Framework are the Common Language Runtime and the .NET Framework Class Library.
Summarize, .NET (dotnet) applications are written in the C#, F#, or Visual Basic programming language. Code is compiled into a language-agnostic Common Intermediate Language (CIL). Compiled code is stored in assemblies—files with a .dll or .exe file extension.
At the end, when an app runs, the CLR takes the assembly and uses a just-in-time compiler (JIT) to turn it into machine code that can execute on the specific architecture of the computer it is running on.
Some people asked me the different between those two following code: Code 1 try { … } catch (Exception ex) { throw ex; } Code 2 try { … } catch (Exception ex) { throw; } I don’t think there is ever a good reason to write catch (Exception e) { throw e; }. This loses the original stacktrace. When you use throw; the original stacktrace is preserved. This is good because it means that the cause of the error is easier to find.
Very often I found this problem and now I got a solution! I’ve compared some methods and I was decided which one. But I verified time (if you want to know how, read this post) of them and the final solutions are: static string TruncateLongString(string str, int maxLength) { return str.Substring(0, Math.Min(str.Length, maxLength)); } or string TruncateString(string str, int maxLength) { return new string(str.Take(maxLength).ToArray()); } The best solution than even is the second one!
I found a simple code to know the execution time of a method. First of all you have to import the following namespace: using System.Diagnostics; Then you use Stopwatch to know the execution time. Stopwatch sw = Stopwatch.StartNew(); DoSomeWork(); sw.Stop(); Console.WriteLine("Time taken: {0}ms", sw.Elapsed.TotalMilliseconds); Happy coding!
You can convert a string to hex or vice-versa with this methods. Example for real world; You want set / get some data from URL, but if your data has some special chars (like ^$ %) it’ll be problem… In this case, you can use this methods and convert your data to hex. public string ConvertStringToHex(string asciiString) { string hex = ""; foreach (char c in asciiString) { int tmp = c; hex += String.Format("{0:x2}", (uint)System.Convert.ToUInt32(tmp.ToString())); } return hex; } public string ConvertHexToString(string HexValue) { string StrValue = ""; while…
I’m looking for an answer to my regular expresssion problem in c#. I’m looking for a match on a specific postcode format and have run into problems. Here you can find my solution with the regex pattern. C# public bool IsPostCode (string postcode) { return ( Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][0-9][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) || Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][0-9][0-9][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) || Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][A-HK-Ya-hk-y][0-9][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) || Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][A-HK-Ya-hk-y][0-9][0-9][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) || Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][0-9][A-HJKS-UWa-hjks-uw][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) || Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][A-HK-Ya-hk-y][0-9][A-Za-z][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z{2}$)”) || Regex.IsMatch(postcode, “(^[Gg][Ii][Rr][]*0[Aa][Aa]$)”) ); } Visual Basic Public Function IsPostCode(postcode As String) As Boolean Return (Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][0-9][ ]*[0-9][ABD-HJLNP-UW-Zabd-hjlnp-uw-z]{2}$)”) OrElse Regex.IsMatch(postcode, “(^[A-PR-UWYZa-pr-uwyz][0-9][0-9][…
Did you received this error when you try to login in your Owin app with Facebook? App Not Set Up: This app is still in development mode, and you don’t have access to it. Switch to a registered test user or ask an app admin for permissions. Solution Go to https://developers.facebook.com/ Click on the My Apps menu on the top bar and select your appThe circle next to your app name is not fully green. When you hover mouse on it, you’ll see a popup saying, "Not available to all…
We have an MVC project using OWIN Framework to allow our users to authenticate using Twitter. However starting today, we have been getting this exception when trying to authenticate: System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure. Thanks to the power of open source we can see that the thumbprints for the twitter certificates have been coded in the Katana Project. Microsoft.Owin.Security.Twitter.TwitterAuthenticationOptions Recently some certificates must have changed and now the thumbprints no longer match. Please add a new thumb print for the "VeriSign Class 3 Public…
If you have problem returning dynamically drawn image from controller below informations may help. The task looks easy and should be achieved with this code: public ActionResult Image(string text) { //Create new image Image img = new Bitmap(100, 50); Graphics g = Graphics.FromImage(img); //Do some drawing Font font = new Font("Arial", 24); PointF drawingPoint = new PointF(10, 10); g.DrawString(text, font, Brushes.Black, drawingPoint); //Return Image MemoryStream ms = new MemoryStream(); img.Save(ms, ImageFormat.Png); return new FileStreamResult(ms, "image/png"); } Unfortunately this won’t work. At least not in .NET 4.0. Perceptive person will…
Register an app in the Microsot Account Developer Center Go to the Microsoft Account Developer Center and create a new application. After you have registered the application take note of the App ID and App Secret: Install the Nuget Package Install the Nuget Package which contains the Microsoft OAuth provider. Install-Package Microsoft.Owin.Security.MicrosoftAccount Register Provider Locate the file in your project called \App_Start\Startup.Auth.cs. Ensure that you have imported the Owin namespace: using Owin; In the ConfigureAuth method add the following lines of code: app.UseMicrosoftAccountAuthentication( clientId: "Your client ID", clientSecret: "Your client…
You might have missed to register your Interface and class (which implements that inteface) registration in your code. e.g if the error is "The current type, xyznamespace. Imyinterfacename, is an interface and cannot be constructed. Are you missing a type mapping?" Then you must register the class which implements the Imyinterfacename in the UnityConfig class in the Register method. Using the following code as an example using System; using Microsoft.Practices.Unity; using Microsoft.Practices.Unity.Configuration; using PSC.Shorturl.Web.Business; using PSC.Shorturl.Web.Business.Implementations; namespace PSC.Shorturl.Web.App_Start { /// /// Specifies the Unity configuration for the main container. ///…
How to setting IIS for .mobi extensions? Open IIS and click on its name Double click on MIME Then right click and in the menu click on Add. Then add as file name extension .mobi and as MIME type application/x-mobipocket-ebook
Hold on to your hats, cowboys and cowgirls! A lot of exciting things are coming out of the .NET Managed Languages team for Visual Studio 2015 Update 1. Read on to learn more about new IDE features, interactive C#, new code analysis management, Visual F# improvements, and the new F5 experience for Roslyn open source development. New Editor Features Now that we have Roslyn in Visual Studio 2015, we can leverage its power to create the smartest IDE out there. The improvements we’ve made to the IDE experience in Update…
Implement the inversion of control pattern is linked with the Dependency Injection Principle states. Here we analyse a simple implementation
These code samples demonstrate how to generate a strong random password, which does not contain ambiguous characters (such as [1,l,I] or [O,0]). A strong password must be at least eight characters long and contain a combination of lower- and upper-case letters, numbers, and special characters. /////////////////////////////////////////////////////////////////////////////// // SAMPLE: Generates random password, which complies with the strong password // rules and does not contain ambiguous characters. // // To run this sample, create a new Visual C# project using the Console // Application template and replace the contents of the Class1.cs…
SQL has an incredibly useful function, REPLACE(), which replaces all occurrences of a specified string with another string, returning a new string. It works great with all forms of NCHAR and NVARCHAR fields. It does not, however, work with NTEXT fields. Fear not — there’s an easy workaround, thanks to type-casting and SQL 2005’s NVARCHAR(max) datatype. Here’s the process in an nutshell. Cast the NTEXT field to the NVARCHAR(max) datatype using the CAST function. Perform your REPLACE on the output of #1. Cast the output of #2 back to NTEXT.…
One of the common requirement of web applications is to provide users a way to download some contents. In case of a report, almost all of the reporting tools have the export to pdf kind of function available. But sometime, it is not a report that needs to be generated in pdf. But it could be simple web page or content of a page or sometimes a plain text needs to be generated in pdf format. There are many third party tools are available for this task. We can import…
The founder of Microsoft and wealthiest man in the world turns 60 years old today. William Henry Gates III was born October 28th, 1955 in Seattle, Washington where he still resides in his post Microsoft years. He has much to celebrate as he turns 60. After leading Microsoft for decades it must be quite rewarding to see the company he founded grow in such a bold direction this year with a booming commercial cloud computing division, new category defining hardware that is leading the competition, and an incredibly fast adoption…
Open Source C# to JavaScript Compiler and Frameworks. Run Your App On Any Device Using JavaScript. Use Bridge.NET to build platform independent applications for mobile, web and desktop. Run on iOS, Windows, Mac, Linux and billions of other devices with JavaScript support. Compile your C# code into native JavaScript and deploy on Billions of devices. Try it on bridge.net or fork it on GitHub
If you google a bit about this problem, you can’t find a right solution because all people are speaking about Hardware Token. Unfortunately this functionality doesn’t exists for Universal Windows Application. There are at the moment only a way. You have to add the Extension reference “Windows Desktop Extensions for the UWP” or “Windows Mobile Extensions for the UWP“, then you can use the following code: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Windows.Security.ExchangeActiveSyncProvisioning; using Windows.System.Profile; namespace PSC.Code { public sealed class DeviceInfo { private static…
When you execute some queries on your SQL Server, are you sure the catalog is being imported? With this simple script you can know which is the Index status. DECLARE @CatalogName VARCHAR(MAX) SET @CatalogName = ‘TEST_FullIndex’ SELECT FULLTEXTCATALOGPROPERTY(@CatalogName,’ItemCount’) as NumberOfItems, FULLTEXTCATALOGPROPERTY(@CatalogName,’ImportStatus’) as ImportStatus, DATEADD(ss, FULLTEXTCATALOGPROPERTY(@CatalogName, ‘PopulateCompletionAge’), ‘1/1/1990′) AS LastPopulated, (SELECT CASE FULLTEXTCATALOGPROPERTY(@CatalogName,’PopulateStatus’) WHEN 0 THEN ‘Idle’ WHEN 1 THEN ‘Full Population In Progress’ WHEN 2 THEN ‘Paused’ WHEN 3 THEN ‘Throttled’ WHEN 4 THEN ‘Recovering’ WHEN 5 THEN ‘Shutdown’ WHEN 6 THEN ‘Incremental Population In Progress’ WHEN 7 THEN ‘Building…
The purpose of this article is to provide a way of cleaning up of HTML tags within the data. When we use various styles or tabular format data in UI using Rich Text Editor/ Rad Grid etc, it will save data in database with HTML tags. When you save in database this kind of field you have: An HTML element starts with a start tag (<p>) and ends with end tag (<p/>) and everything between Start tag and End tag is HTML element. e.g. <b>Following are the popular databases: <br…
As I am doing lots of experiments on my SQL Server test box, I sometime gets too many files in SQL Server data installation folder – the place where I have all the .mdf and .ldf files are stored. I often go to that folder and clean up all unnecessary files I have left there taking up my hard drive space. I run following query to find out which .mdf and .ldf files are used and delete all other files. If your SQL Server is up and running OS will…
I was encouraged to write this Tip/Trick because of so many questions received for this issue. Suppose you’re having a bunch of HTML strings, but you just want to remove all the HTML tags and want a plain text. You can use Regex to come to the rescue. The Regex I had developed before was more cumbersome, then Chris made a suggestion, so I will now go further with the regex suggested by Chris that is a "\<[^\>]*\>". I have tested it for many cases. It detects all types of…
What’s that? I’ll let the code do the speaking. @{ Func<dynamic, object> b = @<strong>@item</strong>; } <span>This sentence is @b(“In Bold”).</span> That could come in handy if you have friends who’ll jump on your case for using the bold tag instead of the strong tag because it’s “not semantic”. Note that the delegate that’s generated is a Func<T, HelperResult>. Also, the @item parameter is a special magic parameter. These delegates are only allowed one such parameter, but the template can call into that parameter as many times as it needs.…
Whilst working on a side project I started to notice I was using a lot of the same HTML to create floating boxes. Whilst these boxes looked the same, the content of them changed quite dramatically; for instance, some of the content boxes contained forms, others contained straight text, like so: <div class="panel"> <div class=panel-inner"> <h2 class="panel-title">Panel Title</h2> <div class="panel-content"> /* Can I pass content to be rendered in here here? */ </div> </div> </div> </div> As my side project progressed and grew, I found myself making more and…
