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ASP.NET Hosting - ASPHostPortal.com :: Creating Help Desk Web Application using ASP.NET Core

clock January 17, 2017 05:28 by author Armend

Suppose you work for a small to midsize company that employs 50-100 workers. The Help Desk -- a subsidiary of the Information Services Division -- is in charge of trouble tickets regarding general PC issues such as email, viruses, network issues, etc. Initially, the Help Desk team stored this information in Excel spreadsheets, but as the company has grown, managing these spreadsheets has become tedious and time consuming.

The Help Desk has asked you to devise a more efficient solution that could be developed internally, saving the company money. As you start to think about it, the following requirements are apparent: fields for the submitter's first and last name, as well as their email address. You'll also need combo boxes for indicating ticket severity (low, medium, high), department, status (new, open, resolved), employee working on the issue, as well as an area for comments. Of all the solutions available, creating an internal help desk Web application with ASP.NET is relatively simple.

In the following article, we'll see how to implement these features in an ASP.NET help desk Web application using a database-driven approach,
Creating the JavaScript File
Because creating the JavaScript file is the easiest of the work left, we'll do this next. From the Solution Explorer, follow these steps:

Creating the Help Desk Class

Now that we have our data coming in, we need to be able to record a help desk ticket submission. We need to create an event handler in a class to handle it. Let's first create a help desk class by doing the following:

  •     Right click the project solution.
  •     Choose Add>New Item.
  •     In the Add New Item window, select Class.cs.
  •     In the name text field, type "HelpDesk" and then click Add.

Double click HelpDesk.cs from the Solution Explorer, which will show the empty class as shown below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace HelpDesk
{
    public class HelpDesk
    {
    }
}

We need to import three libraries as shown below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
namespace HelpDesk
{
    public class HelpDesk
    {
    }
}

The first library (System.Data) allows us to work with stored procedures in ADO.NET, the second (System.Configuration) allows us to reference a connection key from configuration file and the last (System.Data.SqlClient) one allows us to connect to SQL Server.


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ASP.NET Hosting - ASPHostPortal.com :: Trick to Run Website in Many Browser in Visual Studio

clock January 13, 2017 11:12 by author Dan

According to dailydotnettips article, As a web developer, for performing cross browser testing, we need to run our web site in multiple browser from Visual Studio. Generally, in a common way, we select particular browser from browser selection menu and run the application. 

However, you can set multiple browser as your default browser. When you run the application with out debugging ( Ctrl+ F5) , Visual Studio will run the application in all the browser, in case of debugging (F5),  Visual Studio will prompt you to select particular browser from the selected default browser list. You can link this feature very much with Refreshing browsers directly from Visual Studio 2013, where you can refresh the browser directly from Visual Studio.

In the browser list drop-down, by default you will be able to see all the list of added browser, with default browser as checked.

When you select the “Browse With…” option, following dialog will appear, and you can see all the list of browser along with the browser which marked as “(Default)”.

Now, there can be more than one default browser, and same has been written in the dialog control as well – “Browsers (Select one or more):” . So, select all the browser in which you want run the application together, and click on “Set as Default”.  That’s all. Now if you click on “Browse” button in the same dialog control, you will find your web application starts on all the selected browser same time.

If you back to Visual Studio main menu, a new option “Multiple Browser” will appear.

Now, if you want to debug the application, and press “F5” or select the multiple browsers options, following dialog will appear, and you need to select a specific browser from the list of selected browsers.

If you run the application without debugging mode and wanted to run the application to verify the cross browser compatibility, Visual Studio will invoke all the browser for the same application.

This feature is really useful for web developer and who spends time on for cross browser testing ! and of courser – all the web developer spends time for the same !! So, from next time, apply this feature!

Note: This is note new features with Visual Studio 2013, it was available in previous version as well.

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ASP.NET Hosting - ASPHostPortal.com :: How to implement Windows authentication and authorization in ASP.NET

clock January 10, 2017 05:21 by author Armend

This step-by-step article describes how to implement Windows authentication and authorization in an ASP.NET application. To use the built in security of Windows and ASP.NET, implement Windows authentication and authorization on groups and users. To use Windows authentication, you must adjust settings in both Microsoft Internet Information Services (IIS) and the ASP.NET application Web.config file.

Requirements

  • Microsoft Windows 2000 Professional, Windows 2000 Server, Windows 2000 Advanced Server, or Windows XP Professional
  • Microsoft .NET Framework
  • Microsoft Internet Information Services (IIS)
  • Microsoft Visual Studio .NET

Authentication and authorization

Windows authentication and Windows authorization are two terms that are frequently interchanged. However, they do not have the same meaning. Windows authentication permits the recipient to determine the user's identity. Windows authorization determines the resources to which a user may gain access.

Configure Web application for Windows authentication

To configure your Web application for Windows authentication, follow these steps:

  • Create an ASP.NET Web Application named ASPNETWinAuth. By default, theWebForm1.aspx file appears.
  • In the HTML view of WebForm1.aspx, replace the existing code with the following sample code:

    <%=User.Identity.Name%>

  • Click Start, point to Programs, point to Administrative tools, and then click Internet Information Services.
  • The Internet Information Services MMC appears. Expand Computer, and then expand a Web site that uses Windows authentication.
  • Click the ASPNETWinAuth Web site application.
  • On the Action menu, click Properties.
  • In Properties, click the Directory Security tab.
  • Under Anonymous access and authentication control, click Edit.
  • In Authentication Methods, click to select Integrated Windows authentication. Click to clear all other check boxes.
  • Click OK.
  • In Properties, click OK. The ASPNETWinAuth Web application is now configured to accept valid user accounts.

Configure the ASP.NET application

After you configure the IIS Web site for Integrated Windows Authentication, you must configure the ASP.NET application to recognize authenticated users. To do this, you must change the Web.config file. In the Web.config file, locate the <authentication> tag, and then set the mode attribute to Windows, as in the following example:

<authentication mode="Windows" />

Test authentication

To test your Windows authentication setting, follow these steps:

  • In Microsoft Internet Explorer, view the WebForm1.aspx page. This page is located in the Http://Localhost folder. For example:

    http://Localhost/ASPNETWinAuth/WebForm1.aspx

  • Because Integrated Windows Authentication uses the current Windows user information on the client computer for the authentication, it does not immediately prompt the user for a user name and password. However, if the authentication exchange cannot identify the user, a dialog box appears that prompts the user for a Windows user account user name and password.
  • Type a valid user name and password. When the page loads, your user name appears in the following format:

    Domain Name\User Name

Restrict access

In ASP.NET, you set authorization to the application by adding settings in the Web.config file. You can specify which users or groups are permitted to have access to what resources as follows:
To permit all users of an NT Group named Managers to have access to your resources, use the following code:

<configuration>
      <system.web>
        <authorization>
          <allow roles="domainname\Managers" />
          <deny users="*" />
        </authorization>
      </system.web>
    </configuration>

To permit only specific users to have access, use the following code:

<configuration>
      <system.web>
        <authorization>
          <allow users="domainname\user1,domainname\user2,domainname\user3" />
          <deny users="*" />
        </authorization>
      </system.web>
    </configuration>

Note You can specify multiple roles or users by using a comma separated list. Verify that you use the correct case when you specify the configuration file element and the associated attribute values. This code is case sensitive.

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ASP.NET Hosting - ASPHostPortal.com :: Protect Web Pages Using .htaccess Files

clock January 8, 2017 13:47 by author Armend

A .htaccess file (pronounced ‘dot aitch tee access’ or simply ‘aitch tee access’) is aspecial configuration file used on web servers running the Apache httpd web server software. When someone visits a page that is sitting in a directory alongside, or in the same branch as, a .htaccess file then that configuration file will be loaded by the server and processed.

.htaccess files are used to reconfigure the web server without needing to restart it. These files can be used to enable or disable additional functionality and features, such as creating redirects, disabling directory listings and password protecting directories.

If you want to password protect some of your web pages, then you need to use a .htaccess file with a .htpasswd password file. This tutorial will tell you step-by-step what you need to do.


Step By Step Instructions
Let's suppose you want to restrict files in a directory called members to username memberone with password memberonepassword. Here's what to do:
1. Create a file called .htaccess in directory members that looks like this:

AuthType Basic
AuthName "Restricted access"
AuthUserFile /home/USERNAME/.htpasswd
require valid-user


Notes
:

  • In the AuthUserFile line, replace USERNAME with your ftp username.
  • The .htaccess file must be an ASCII text document.
  • A .htaccess file can be created in any word processor but must be saved as text only.
  • IF you upload your .htaccess file via FTP, the FTP client must be set to ASCII mode for transfer.
  • For security reasons, the .htaccess file on the server cannot be seen in a directory listing. If you don't see it after uploading it, don't worry.
    Also note that AuthName can be anything you want. The AuthName field gives the Realm name for which the protection is provided. This name is usually given when a browser prompts for a password, and is also usually used by a browser in correlation with the URL to save the password information you enter so that it can authenticate automatically on the next challenge.

2. Use the htpasswd command, from your home directory, to create a password file called .htpasswd in your home directory:
SSH to your home directory. This is simply done by connecting with your SSH client and NOT entering any path, and NOT changing directories after connecting. After connecting to your home directory via SSH, enter:

# htpasswd -c .htpasswd memberone

Type the password -- memberonepassword -- twice as instructed.
3. That's the setup done. Now test by trying to access a file in the directory members; your browser should demand a username and password, and not give you access to the file if you don't enter memberone and memberonepassword.


Multiple Usernames/Passwords

If you want to give access to a directory to more than one username/password pair, follow the steps above to create the .htaccess file and to create the .htpasswd file with one user. Then, add additional users to the .htpasswd file by using the htpasswd command without the -c:

# htpasswd .htpasswd membertwo
New password:
Re-type new password:
Adding password for user membertwo


Changing Passwords

If you want to change the password for an existing user, simply issue the same command as when you added the user. You will then be prompted for a new password. For example, if the user membertwo already exists and you want to change the password, just SSH to your home directory and enter:

# htpasswd .htpasswd membertwo


Password Protecting Multiple Directories
If you want to password protect multiple directories, and allow all users access to all password protected directories, then all you need to do is put the same .htaccess file in each directory that you want to password protect.

However, if you want to password protect multiple directories, and only allow certain users access to each directory, then you can create a different password file (all in your home directory) for each password protected directory.

Let's say you have 3 different directories (members, admins, board) you want password protected, and each one has a different set of users that you want to allow access. Then just do the following:

Create three .htaccess files and put them in their appropriate directory:

AuthType Basic
AuthName "Restricted access"
AuthUserFile /home/USERNAME/.htpasswd.members
require valid-user
AuthType Basic
AuthName "Restricted access"
AuthUserFile /home/USERNAME/.htpasswd.admins
require valid-user
AuthType Basic
AuthName "Restricted access"
AuthUserFile /home/USERNAME/.htpasswd.board
require valid-user

Remember to replace USERNAME with your ftp username (in lower case).

Create three .htpasswd files in your home directory:

# htpasswd -c .htpasswd.members memberone
# htpasswd -c .htpasswd.admins adminone
# htpasswd -c .htpasswd.board boardmemberone

That's it. Now when you need to add a user to one of the directories, just issue the htpasswd command on the appropriate .htpasswd file.

 

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ASP.NET Hosting - ASPHostPortal.com :: How to Stop AutoFill Browser in TextBox with ASP.NET

clock January 8, 2017 04:03 by author Dan

According to dotmettrick's website. Today’s browsers like Chrome, Firefox, Internet Explorer and Safari has functionality of auto complete values in TextBoxes. If you have enabled this features in your browser, then each and every time when you start to enter value in TextBox you get a drop down of prefilled values in that TextBox. This feature of browser can be disabled by the programming for a specific web form like payment form and other confidential information form of a web application.

In chrome browser, we can enable auto-fill as shown below:

Suppose we have a below form for online payment of product by credit card or debit card then it is mandatory to stop auto complete functionality of browser so that browser doesn’t save the confidential information of a customer’s credit card or debit card.


We can turn off auto-fill for our complete form by setting autocomplete attribute value to off as shown below:

     <form id="Form1" method="post" runat="server" autocomplete="off">
     .
     .
    </form>


We can also turn off auto-fill for a particular TextBox by setting autocomplete attribute value to off as shown below:

     <asp:TextBox Runat="server" ID="txtConfidential" autocomplete="off"></asp:TextBox>

We can also do this from code behind also like as:

     txtConfidential.Attributes.Add("autocomplete", "off");

After doing one of above code you will see that there is no auto-fill.


Summary

In this article, I explain how can you stop auto-complete in TextBox by programming. I hope you will use this trick in your web form. I would like to have feedback from my blog readers. Please post your feedback, question, or comments about this article.

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ASP.NET Hosting - ASPHostPortal.com :: Change Startup.cs and wwwroot folder name in ASP.NET Core

clock November 22, 2016 06:45 by author Armend

ASP.NET Core runs on conventions. It expects Startup.cs file for starting up the ASP.NET Core application and wwwroot folder for the application’s static contents. But what if you want to change the name of Startup.cs and wwwroot to your choice? Well, that can be done. In this short post, we will see how to change Startup.cs and wwwroot folder name in ASP.NET Core.

 

Change Startup.cs class name

You can easily change the startup class name. Open the Startup.cs file and change the startup class name from Startup to “MyAppStartup” (or anything of your choice). And also change the name of the constructor.

public class MyAppStartup
{
    public MyAppStartup(IHostingEnvironment env)
    {
       
    }
}

Now you need to tell ASP.NET Core about new Startup class name, otherwise application will not start. So open Program.cs file and change the UseStartup() call as follows:

public static void Main(string[] args)
{
    var host = new WebHostBuilder()
        .UseKestrel()
        .UseContentRoot(Directory.GetCurrentDirectory())
        .UseIISIntegration()
        .UseStartup<MyAppStartup>()
        .Build();
    host.Run();
}

That’s it.

Change wwwroot folder name

Earlier, I posted how to rename the wwwroot folder via hosting.json file but that doesn’t seem to work now. To change the name, right on wwwroot folder and rename it to “AppWebRoot” (or anything of your choice).
Now, open Program.cs file and add highlighted line of code to Main().

public static void Main(string[] args)
{
    var host = new WebHostBuilder()
        .UseKestrel()
        .UseWebRoot("AppWebRoot")
        .UseContentRoot(Directory.GetCurrentDirectory())
        .UseIISIntegration()
        .UseStartup<MyStartup>()
        .Build();
 
    host.Run();
}

That’s it.
Hope you liked it. Thank you for reading.

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ASP.NET Hosting - ASPHostPortal.com :: All About ASP.NET Master Pages

clock November 11, 2016 10:31 by author Dan

According to venkataspinterview blog, What are Master Pages in ASP.NET? or What is a Master Page? ASP.NET master pages allow you to create a consistent layout for the pages in your application. A single master page defines the look and feel and standard behavior that you want for all of the pages (or a group of pages) in your application. You can then create individual content pages that contain the content you want to display. When users request the content pages, they merge with the master page to produce output that combines the layout of the master page with the content from the content page.

What are the 2 important parts of a master page?
The following are the 2 important parts of a master page
1. The Master Page itself
2. One or more Content Pages

Can Master Pages be nested?
Yes, Master Pages be nested.

What is the file extension for a Master Page?
.master

How do you identify a Master Page?
The master page is identified by a special @ Master directive that replaces the @ Page directive that is used for ordinary .aspx pages.

Can a Master Page have more than one ContentPlaceHolder?
Yes, a Master Page can have more than one ContentPlaceHolder

What is a ContentPlaceHolder?
ContentPlaceHolder is a region where replaceable content will appear.

How do you bind a Content Page to a Master Page?
MasterPageFile attribute of a content page's @ Page directive is used to bind a Content Page to a Master Page.

Can the content page contain any other markup outside of the Content control?
No.

What are the advantages of using Master Pages?
1. They allow you to centralize the common functionality of your pages so that you can make updates in just one place.
2. They make it easy to create one set of controls and code and apply the results to a set of pages. For example, you can use controls on the master page to create a menu that applies to all pages.
3. They give you fine-grained control over the layout of the final page by allowing you to control how the placeholder controls are rendered.
4. They provide an object model that allows you to customize the master page from individual content pages.

What are the 3 levels at which content pages can be attached to Master Page?
At the page level - You can use a page directive in each content page to bind it to a master page

At the application level - By making a setting in the pages element of the application's configuration file (Web.config), you can specify that all ASP.NET pages (.aspx files) in the application automatically bind to a master page.

At the folder level - This strategy is like binding at the application level, except that you make the setting in a Web.config file in one folder only. The master-page bindings then apply to the ASP.NET pages in that folder.

What is @MasterType directive used for?
@MasterType directive is used to create a strongly typed reference to the master page.

Are controls on the master page accessible to content page code?
Yes, controls on the master page are accessible to content page code.

At what stage of page processing master page and content page are merged?
During the initialization stage of page processing, master page and content page are merged.

Can you dynaimically assign a Master Page?
Yes, you can assign a master page dynamically during the PreInit stage using the Page class MasterPageFile property as shown in the code sample below.
void Page_PreInit(Object sender, EventArgs e)
{
this.MasterPageFile = "~/MasterPage.master";
}


Can you access non public properties and non public methods of a master page inside a content page?
No, the properties and methods of a master page must be public in order to access them on the content page.

From the content page code how can you reference a control on the master page?
Use the FindControl() method as shown in the code sample below.
void Page_Load()
{
// Gets a reference to a TextBox control inside
// a ContentPlaceHolder
ContentPlaceHolder ContPlaceHldr = (ContentPlaceHolder)Master.FindControl ("ContentPlaceHolder1");
if(ContPlaceHldr != null)
{
TextBox TxtBox = (TextBox)ContPlaceHldr.FindControl("TextBox1");
if(TxtBox != null)
{
TxtBox.Text = "TextBox Present!";
}
}
// Gets a reference to a Label control that not in
// a ContentPlaceHolder
Label Lbl = (Label)Master.FindControl("Label1");
if(Lbl != null)
{
Lbl.Text = "Lable Present";
}

}

Can you access controls on the Master Page without using FindControl() method?
Yes, by casting the Master to your MasterPage as shown in the below code sample.
protected void Page_Load(object sender, EventArgs e)
{
MyMasterPage MMP = this.Master;
MMP.MyTextBox.Text = "Text Box Found";
}

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ASP.NET Hosting - ASPHostPortal.com :: Handle Multiple Submit Buttons On The Same Form in MVC 6

clock November 8, 2016 07:11 by author Armend

In this post we will explain you about Handling multiple submit buttons on the same form in MVC.To fix this problem, I’m progressing to justify the varied techniques for handling multiple buttons on the same form in Sometimes you got situation like more than one submit buttons on a similar form in ASP.NET MVC 6. At that point, How we will handle the click event of every and each buttons on your form? Suppose you’ve got a user Login form.

On the above picture, we have the SignUp, SignIn and the Cancel buttons. Suppose on Signup button click you have to open Signup window & on SignIn button click you have to open Login window and on Cancel button click you are returning to home page. For handling all of the above buttons, we have the following methods:

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Now, Make the view Form with Multiple Button in Home Folder with the following code.

MultipleCommand.cshtml
@model Mvc4_Multiple_Submit_Button.Models.RegistrationModel
@{
ViewBag.Title = "Handling Multiple Command Buttons";
}
<script src="../../Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>
<script src="../../Scripts/jquery.validate.min.js" type="text/javascript"></script>
<script src="../../Scripts/jquery.validate.unobtrusive.min.js" type="text/javascript"></script>
<h2>User's Signup Form</h2>
@using (Html.BeginForm("MultipleCommand", "Home", FormMethod.Post, new { id = "submitForm" }))
{
<fieldset>
<legend>Registration Form</legend>
<ol>
<li>
@Html.LabelFor(m => m.Name)
@Html.TextBoxFor(m => m.Name, new { maxlength = 50 })
@Html.ValidationMessageFor(m => m.Name)
</li>
<li>
@Html.LabelFor(m => m.Address)
@Html.TextAreaFor(m => m.Address, new { maxlength = 200 })
@Html.ValidationMessageFor(m => m.Address)
</li>
<li>
@Html.LabelFor(m => m.MobileNo)
@Html.TextBoxFor(m => m.MobileNo, new { maxlength = 10 })
@Html.ValidationMessageFor(m => m.MobileNo)
</li>
</ol>
<button type="submit" id="btnSave" name="Command" value="Save">
Save</button>
<button type="submit" id="btnSubmit" name="Command" value="Submit">
Submit</button>
<button type="submit" id="btnCancel" name="Command" value="Cancel" onclick="$('#submitForm').submit()">
Cancel (Server Side)</button>
<button type="submit" id="btnCancelSecForm" name="Command" value="Cancel" onclick="$('#cancelForm').submit()">
Cancel (Server Side by Second Form)</button>
<button name="ClientCancel" type="button" onclick=" document.location.href = $('#cancelUrl').attr('href');">
Cancel (Client Side)</button>
<a id="cancelUrl" href="@Html.AttributeEncode(Url.Action("Index", "Home"))" style="display:none;">
</a>
</fieldset>
}
@using (Html.BeginForm("MultipleButtonCancel", "Home", FormMethod.Post, new { id = "cancelForm" })) { }

Next step, in Homecontroller include the MultipleCommand Method to handle the multiple button with the following code.

HomeController.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Mvc4_Multiple_Submit_Button.Models;
namespace Mvc4_Multiple_Submit_Button.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult MultipleCommand()
{
return View();
}
[HttpPost]
public ActionResult MultipleCommand(RegistrationModel mReg, string Command)
{
if (Command == "Save")
{
//TO DO : for Save button Click
}
else if (Command == "Submit")
{
//TO DO : for Submit button Click
}
else
{
//TO DO : for Cancel button Click
return RedirectToAction("Index");
}
return View();
}
[HttpPost]
public ActionResult MultipleButtonCancel()
{
//TO DO : for Cancel button Click
return RedirectToAction("Index");
}
}
}


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ASP.NET Hosting - ASPHostPortal.com :: How To Deploy an ASP.NET Core Application on Linux with Docker

clock October 25, 2016 08:41 by author Armend

Deploy an ASP.NET Core Application on Linux with Docker

Docker and containerization is all the rage these days. Adoption in the .NET community has been slow so far, but that’s changing. With the introduction of cross-platform .NET Core, it became much easier to run .NET code on Linux machines. And, since Docker is a primarily Linux-based technology, it’s now very straightforward to deploy ASP.NET Core applications using Docker. How? Let’s take a look.

 

At a high level, containerization solves problems related to deploying and running your application on a server somewhere “out there.” I have fond memories of deploying code for the first time as a junior developer by manually copy-pasting binaries into production. Fortunately, no one is doing that anymore (right?). Today, automated build tools can handle the steps required to push code to a production machine. Containerization can take you one step further… by abstracting away the machine itself.

How does Docker work?

Docker is similar to a virtual machine, but without the overhead. A service called Docker Engine runs on your server, ready to host one (or many) containers. Containers that run on top of Docker Engine are completely isolated. As far as the applications inside each container are concerned, they’re running on separate machines. In reality, they’re just isolated processes on the same machine.
Containers run Docker images, which are packages that represent everything needed to spin up your application or service inside the container: dependencies, shared libraries, application binaries, and so on. During development, you define the “recipe” that is built into the final image. This recipe is called a Dockerfile.

Why use Docker instead of a virtual machine?

If you’ve ever set up a web or application server, think of everything necessary to go from a “bare metal” virtual machine to a running production server: besides installing the OS, you have to get the latest patches, install framework runtimes and dependencies, grab third-party libraries, configure networking and routes to your other services, install your application code, and then configure it all. And, if you have multiple servers in your environment, or you’re frequently spinning up new servers, you have to do this a lot.
Containerization allows you to do all of the setup work once, and build the result into an image you can immediately run on any machine using Docker Engine. It moves the focus away from setting up servers, and lets you instead focus on building images that include everything needed to run anywhere.

  • Containerization doesn’t replace virtual machines – in fact, the two technologies go hand-in-hand. A common approach is to have a handful of virtual machines in a cluster, each running Docker Engine and hosting many containers.

Ultimately, there are use cases for both technologies. You probably don’t need to boot up an entire guest OS and tens or hundreds of background services just to run a single application – running inside a thin container makes more sense. Conversely, sometimes you do want to have an entire OS dedicated to a particular task, especially if it’s something CPU-intensive. Virtual machines are well-suited for the latter, and containerization makes the former easier to manage.
If you’ve never set up Docker or deployed an ASP.NET Core project as a Docker image, this is the tutorial for you! I’ll walk through the steps required to:

Setting up Docker

It’s easy to get started with Docker. First, you have to install the Docker Engine on your machine (or your server)
For my own testing, I installed Docker for Windows on my Windows 10 development environment, and also on my Mac. To make sure the service is installed correctly, run this from the terminal:

> docker --version
Docker version 1.12.0-rc4, build e4a0dbc, experimental

If you see a version number, everything is working!

Creating an ASP.NET Core project

If you don’t already have the latest .NET Core tooling installed, grab that at the official .NET Core site. Once it’s installed on your machine, you can create a new directory and scaffold a new ASP.NET Core project easily

mkdir AspNetCoreHelloWorld
cd AspNetCoreHelloWorld
dotnet new -t web

To make sure everything is working, try running the project locally first:

dotnet restore
dotnet run

Building a Dockerfile for ASP.NET Core

Docker needs a Dockerfile that contains the “recipe” for creating an image based on the project. Create a new file called Dockerfile in the project directory:

touch Dockerfile

On Windows, you can run notepad Dockerfile instead, or use your favorite text editor. Make sure that this file isn’t saved with an extension like .txt – it’s supposed to have no extension.
The Dockerfile contents are straightforward:

FROM microsoft/dotnet:latest
COPY . /app
WORKDIR /app
RUN ["dotnet", "restore"]
RUN ["dotnet", "build"]
EXPOSE 5000/tcp
ENV ASPNETCORE_URLS http://*:5000
ENTRYPOINT ["dotnet", "run"]

Here’s what each of these instructions does:

  • FROM tells Docker that you want to base your image on the existing image called microsoft/dotnet:latest. This image already contains all the dependencies for running .NET Core on Linux, so you don’t have to worry about setting those up.
  • COPY and WORKDIR copy the current directory’s contents into a new directory inside the container called /app, and set that to the the working directory for the subsequent instructions.
  • RUN executes dotnet restore and dotnet build, which restores the packages needed to run the ASP.NET Core application and compiles the project.
  • EXPOSE tells Docker to expose port 5000 (the default port for ASP.NET) on the container.
  • ENV sets the environment variable ASPNETCORE_URLS in the container. This will ensure that ASP.NET Core binds to the correct port and address.
  • ENTRYPOINT specifies the command to execute when the container starts up. In this case, it’s dotnet run.

Creating the Docker image

Once you’ve created the Dockerfile, you’re ready to build an image:

docker build -t mydemos:aspnetcorehelloworld .   
docker build -t mydemos:aspnetcorehelloworld .

See that trailing period? That tells docker to look in the current directory for a Dockerfile. The -t flag tags the image with tag mydemos:aspnetcorehelloworld.
When the image finishes building, you can spin it up:

docker run -d -p 8080:5000 -t mydemos:aspnetcorehelloworld
docker run -d -p 8080:5000 -t mydemos:aspnetcorehelloworld

The -d flag tells Docker to run the container in detached mode (in the background). The -p flag will map port 8080 on the host machine to port 5000 inside the container. Finally, the -t flag is used to specify which image to run. That’s it! You should see your container running when you check docker ps

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ASP.NET Hosting - ASPHostPortal.com :: Easy Steps to Use Method Overloading in C# ASP.NET

clock October 7, 2016 22:26 by author Dan

If a class have multiple methods by same name but different parameters, it is known as Method Overloading.

string sum(int A)
string sum(int A, int B)

C# no need to use any keyword while overloading a method either in same class or in derived class.

While overloading methods, a rule to follow is the overloaded methods must differ either in number of arguments they take or the data type of at least one argument.

Example

using System;
namespace MethodOverloading
{
    class Class1
    {
        public int Sum(int A, int B)
        {
            return A + B;
        }
        public float Sum(int A, float B)
        {
            return A + B;
        }
    }
    class MainClass
    {
        static void Main()
        {
            Class1 obj = new Class1();
            Console.WriteLine(obj.Sum(20, 30));
            Console.WriteLine(obj.Sum(20, 15.70f));
            Console.Read();
        }
    }
}

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