Error handling can be a drag, but it’s essential for the stability of your app. Naturally, I’m interested in ways to streamline the error handling process to make it as stable as it can be for the app whilst also being convenient for me to write. The async callback standard in Node.js suggests that the first parameter of the callback is an error object. If that's null, you can move along. If it's not, or you have an error thrown elsewhere, you have to figure out what to do. Let's take a look at our options!

Callback can carry on assuming the operation succeeded. Otherwise, it can deal with the error in an appropriate way, such as logging it along with any contextual information. It can then decide whether or not to carry on depending on the severity of the error or whether or not the resultant data is required to continue operation.

Let’s implement some error handling for our query error:

var log = console.log;
// We misspell 'SELECT' in this query so it fails
var query = 'SLECT 1 + 1';
con.query(query, function(err){
  if (err) return log("Query failed. Error: %s. Query: %s", err, query);
});

Our favourite library for asynchronous flow control is async. Both async.parallel and async.series accept a collection of operations, and if any of them pass an error to its callback, async will immediately invoke your completion callback with the error:

var async = require('async');
var log = console.log;
var op1 = function(cb) {
  // We misspell 'SELECT' in this query so it fails
  var query = 'SLECT 1 + 1';
  con.query(query, cb);
}

var op2 = function(cb) {
  // This query is fine
  con.query('SELECT 1 + 1', cb);
}

var ops = [op1, op2];

async.parallel(ops, function(err, results) {
  if (err) return log("Something went wrong in one of our ops. Err: %s", err);

  // Otherwise, process results
});

async.parallel will execute both op1 and op2 in parallel but if either or both fail it will invoke our completion callback with the error that occurred first.

Standard callbacks are all well and good when we’re following Node’s convention, but it’s a little bit laborious to check the result of every operation, and this can quickly get messy when there are many nested callbacks each with their own error handling code.


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Websocket implements the server side of the WebSocket protocol. The WebSocket protocol is a protocol introduced in HTML5, intended to replace Comet and other long-polling solutions, to provide a rich communication mechanism over HTTP. The WebSocket protocol was standardized by IETF as RFC 6455. We could find introductions and more information on Wikipedia and W3C.

Microsoft .NET 4.5 provides several ways in using WebSocket. On the server side, we can host our WebSocket server through any one of the ways below:

• Using HttpContext.AcceptWebSocketRequest
• Creating a WCF service with CallbackContract and the new netHttpBinding
• Using WebSocketHandler or WebSocketHost provided in Microsoft.WebSockets.dll
  

Here is the step by step how to enable WebSocket Protocol on Windows Server 2012 and Windows 8 on server side:

NOTE: The web server must be IIS 8 and above.

Enable WebSocket Protocol in Windows Server 2012

On Windows Server 2012, you could do that through Server Manager -> Manage -> Add Roles and Features. -> Expand the Web Server (IIS) role and check Web Server -> Application Development -> WebSocket Protocol.

Enable WebSocket Protocol in Windows 8

Open "Control Panel" -> Open "Turn Windows features on or off" -> Expand “Internet Information Services” -> Expand “World Wide Web Services” -> Expand “Application Development Features" -> Checklist WebSocket Protocol and click “OK”

Disable WebSocket when using socket.io on node.js

If you are using the WebSocket support in socket.io on node.js in your site, you will need to disable the default IIS WebSockets module by adding the below snippet to your web.config or applicationHost.config. If this is not done, the IIS WebSockets module will attempt to handle the WebSocket communication rather than letting this task fall through to node.js (and hence your application). This will result in unexpected errors when you attempt to access your site.

<system.webServer>
    ...
    <webSocket enabled=”false”/>
</system.webServer>

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This article discusses integration of PayPal Payment in ASP.NET web application. Nowadays PayPal is the most popular payment gateway worldwide because it is totally free to integrate and PayPal does not charge anything for opening an account, you will pay PayPal when you get paid. And the amount is also lower than other payment gateways.

PayPal supports several types of payments:

• Payments for goods in the PayPal cart. PayPal is responsible for all operations supporting the cart in this case. Unfortunately, this option does not provide the maximum flexibility that is required to implement some projects, so the article does not consider this option.
• Recurring billing or subscription. PayPal provides a subscription capability; that means that a definite sum will be periodically transferred from the user's account to the seller's account. The user can unsubscribe anytime. The seller can specify the subscription's period and cost. He also can organize a trial period to let the user assess the quality of services he provides. The trial period can be either paid or free.
• "One click" shopping. Goods are not put into the cart in this case. This method also is used to pay for goods in a cart that was filled without PayPal. That's why this option provides maximum flexibility and full control of the cart.

Let’s start step by step work to integrate PayPal payment :

1.  Create PayPal account on PayPal Sandbox: Basically, PayPal provides an environment to developer that how they can integrate PayPal payment in their website. So just open URL: https://developer.paypal.com/ and click on SignUp option.

2. Create buyer (Personal Account) and one seller account (Business Account) PayPal account.

3. Having a valid PayPal API Token Key

4. Having PayPal business account email id

5. Create New Page on ASP.NET project and copy this script :

On ASPX PAGE:

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"

    CodeFile="Default.aspx.cs" Inherits="_Default" %>

 

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

</asp:Content>

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

    <div>

        <table width="700" align="center" cellpadding="0" cellspacing="0">

            <tr>

                <td height="60">

                    <b>Paypal Integration in ASP.NET</b>

                </td>

            </tr>

            <tr>

                <td height="40" align="center">

                    <asp:GridView ID="gvPayPal" runat="server" AutoGenerateColumns="False" OnRowCommand="gvPayPal_RowCommand"

                        BackColor="#DEBA84" BorderColor="#DEBA84" BorderStyle="None" BorderWidth="1px"

                        CellPadding="3" CellSpacing="2">

                        <RowStyle ForeColor="#8C4510" BackColor="#FFF7E7" />

                        <Columns>

                            <asp:TemplateField HeaderText="Product Name">

                                <ItemTemplate>

                                    <asp:Label ID="lblName" runat="server" Text='<%#Eval("prodName") %>'></asp:Label>

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField HeaderText="Product Description">

                                <ItemTemplate>

                                    <asp:Label ID="lblDescription" runat="server" Text='<%#Eval("prodDesc") %>'></asp:Label>

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField HeaderText="Product price">

                                <ItemTemplate>

                                    <asp:Label ID="lblProductPrice" runat="server" Text='<%#Eval("prodPrice") %>'></asp:Label>

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField HeaderText="Buy Now">

                                <ItemTemplate>

                                    <asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/images/buy.png"

                                       Width="64" Height="64" CommandName="buy" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" />

                                </ItemTemplate>

                            </asp:TemplateField>

                        </Columns>

                        <FooterStyle BackColor="#F7DFB5" ForeColor="#8C4510" />

                        <PagerStyle ForeColor="#8C4510" HorizontalAlign="Center" />

                        <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="White" />

                        <HeaderStyle BackColor="#A55129" Font-Bold="True" ForeColor="White" />

                        <SortedAscendingCellStyle BackColor="#FFF1D4" />

                        <SortedAscendingHeaderStyle BackColor="#B95C30" />

                        <SortedDescendingCellStyle BackColor="#F1E5CE" />

                        <SortedDescendingHeaderStyle BackColor="#93451F" />

                    </asp:GridView>

                </td>

            </tr>

        </table>

        <!-- PayPal Logo -->

        <table border="0" cellpadding="10" cellspacing="0" align="center">

            <tr>

                <td align="center">

                </td>

            </tr>

            <tr>

                <td align="center">

                    <a style="cursor:pointer;" title="Paypal payment gateway center" onclick="javascript:window.open('https://www.paypal.com/cgi-bin/webscr?cmd=xpt/Marketing/popup/OLCWhatIsPayPal-outside','olcwhatispaypal','toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, width=400, height=350');">

                        <img src="https://www.paypal.com/en_US/i/bnr/horizontal_solution_PPeCheck.gif" border="0"

                            alt="Solution Graphics"></a>

                </td>

            </tr>

        </table>

        <!-- PayPal Logo -->

    </div>

</asp:Content>

On CS PAGE :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Configuration;

using System.Data.SqlClient;

using System.Data;

 

public partial class _Default : System.Web.UI.Page

{

    SqlConnection Con = new SqlConnection(ConfigurationManager.ConnectionStrings["ApplicationServices"].ToString());

    SqlCommand cmd = new SqlCommand();

    SqlDataAdapter da = new SqlDataAdapter();

    DataTable dt = new DataTable();

    DataRow dr;

 

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            //Add some column to datatable display some products information           

            dt.Columns.Add("prodName");

            dt.Columns.Add("prodDesc");

            dt.Columns.Add("prodPrice");

 

            //Add rows with datatable and bind in the grid view

            dr = dt.NewRow();

            dr["prodName"] = "MindStick Cleaner";

            dr["prodDesc"] = "Cleans all system dummy data";

            dr["prodPrice"] = "$100.00";

            dt.Rows.Add(dr);

 

            dr = dt.NewRow();

            dr["prodName"] = "MindStick DataConverter";

            dr["prodDesc"] = "Helps to import export data in different format";

            dr["prodPrice"] = "$120.00";

            dt.Rows.Add(dr);

 

            dr = dt.NewRow();

            dr["prodName"] = "MindStick SurveyManager";

            dr["prodDesc"] = "Helps creating survey page with specified format dll";

            dr["prodPrice"] = "$140.00";

            dt.Rows.Add(dr);

 

            dr = dt.NewRow();

            dr["prodName"] = "MindStick TeraByte Importer";

            dr["prodDesc"] = "Data transfer utility";

            dr["prodPrice"] = "$30.00";

            dt.Rows.Add(dr);

 

            gvPayPal.DataSource = dt;

            gvPayPal.DataBind();

        }

    }

 

    protected void gvPayPal_RowCommand(object sender, GridViewCommandEventArgs e)

    {

        if (e.CommandName == "buy")

        {

            ImageButton ib = (ImageButton)e.CommandSource;

            int index = Convert.ToInt32(ib.CommandArgument);

            GridViewRow row = gvPayPal.Rows[index];

 

            //Get each Column label value from grid view and store it in label

            Label pName = (Label)row.FindControl("lblName");

            Label pDescription = (Label)row.FindControl("lblDescription");

            Label pPrice = (Label)row.FindControl("lblProductPrice");

 

            //Here store that person name who are going to make transaction

            Session["user"] = "Arun Singh";

 

            // make query string to store logged in user information in sql server table         

            string query = "";

            query = "insert into purchase(pname,pdesc,price,uname) values('" + pName.Text + "','" + pDescription.Text + "','" + pPrice.Text.Replace("$", "") + "','" + Session["user"].ToString() + "')";

            Con.Open();

            cmd = new SqlCommand(query, Con);

            cmd.ExecuteNonQuery();

            Con.Close();

 

            //Pay pal process Refer for what are the variable are need to send http://www.paypalobjects.com/IntegrationCenter/ic_std-variable-ref-buy-now.html

 

            string redirectUrl = "";

 

            //Mention URL to redirect content to paypal site

            redirectUrl += "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_xclick&business=" + ConfigurationManager.AppSettings["paypalemail"].ToString();

 

            //First name I assign static based on login details assign this value

            redirectUrl += "&first_name=Arun_Seller";

           

            //Product Name

            redirectUrl += "&item_name=" + pName.Text;

 

            //Product Amount

            redirectUrl += "&amount=" + pPrice.Text;

 

            //Business contact paypal EmailID

            redirectUrl += "&[email protected]";

 

            //Shipping charges if any, or available or using shopping cart system

            redirectUrl += "&shipping=5";

 

            //Handling charges if any, or available or using shopping cart system

            redirectUrl += "&handling=5";

 

            //Tax charges if any, or available or using shopping cart system

            redirectUrl += "&tax=5";

 

            //Quantiy of product, Here statically added quantity 1

            redirectUrl += "&quantity=1";

 

            //If transactioin has been successfully performed, redirect SuccessURL page- this page will be designed by developer

            redirectUrl += "&return=" + ConfigurationManager.AppSettings["SuccessURL"].ToString();

 

            //If transactioin has been failed, redirect FailedURL page- this page will be designed by developer

            redirectUrl += "&cancel_return=" + ConfigurationManager.AppSettings["FailedURL"].ToString();

 

            Response.Redirect(redirectUrl);

        }

    }

}

 

On DESIGN PAGE :

USE [MyDatabase]

GO

 

/****** Object:  Table [dbo].[purchase]    Script Date: 01/27/2013 09:26:07 ******/

SET ANSI_NULLS ON

GO

 

SET QUOTED_IDENTIFIER ON

GO

 

SET ANSI_PADDING ON

GO

 

CREATE TABLE [dbo].[purchase](

      [Id] [int] IDENTITY(1,1) NOT NULL,

      [PName] [nvarchar](100) NULL,

      [PDesc] [nvarchar](100) NULL,

      [Price] [money] NULL,

      [Uname] [varchar](50) NULL,

 CONSTRAINT [PK_purchase] PRIMARY KEY CLUSTERED

(

      [Id] ASC

)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]

) ON [PRIMARY]

 

GO

 

SET ANSI_PADDING OFF

GO

On web.config file:

<?xml version="1.0"?>

<!--

  For more information on how to configure your ASP.NET application, please visit

  http://go.microsoft.com/fwlink/?LinkId=169433

  -->

<configuration>

  <connectionStrings>

    <add name="ApplicationServices" connectionString="data source=Arun-PC;Integrated Security=true; Initial Catalog= MyDatabase; User Id= Arun-PC; Password= mindstick;" providerName="System.Data.SqlClient"/>

  </connectionStrings>

  <system.web>

    <compilation debug="true" targetFramework="4.0"/>

    <authentication mode="Forms">

      <forms loginUrl="~/Account/Login.aspx" timeout="2880"/>

    </authentication>

    <membership>

      <providers>

        <clear/>

        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/"/>

      </providers>

    </membership>

    <profile>

      <providers>

        <clear/>

        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>

      </providers>

    </profile>

    <roleManager enabled="false">

      <providers>

        <clear/>

        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/"/>

        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/"/>

      </providers>

    </roleManager>

  </system.web>

  <appSettings>

    <add key="token" value="(insert your paypal API Signature) "/>

    <add key="paypalemail" value="(insert with paypal login email id)"/>

    <!--Here i used sandbox site url only if you hosted in live change sandbox to live paypal URL-->

    <add key="PayPalSubmitUrl" value="https://www.sandbox.paypal.com/cgi-bin/webscr"/>

    <add key="FailedURL" value="http://localhost:49666/PayPalIntegration/Failed.aspx"/> <!--Failed Page URL-->

    <add key="SuccessURL" value="http://localhost:49666/Default.aspx"/> <!--Success Page URL-->

  </appSettings>

  <system.webServer>

    <modules runAllManagedModulesForAllRequests="true"/>

  </system.webServer>

</configuration>

6. Run the project to see the result.

 

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ASP.NET is a web programming platform developed by Microsoft. It is the successor to Active Server Pages. The term "classic ASP" is often used to distinguish previous versions of Active Server Pages with the .NET (pronounced "dot net") versions. How many ways do you know to send the data between ASP.NET Pages? In this post I’m going to list 8 different ways.

Now, let me explain how to learn multiple ways to transfer data from one ASP.NET page to another. Some of these include using the cache, http posts, querystring variables, ASP.NET session state, etc. Each button in the demo has the required code in it's Click event handler, and brings you to a separate target page that gets and displays the data that was sent. Let’s check here are the methods:

1. Use the querystring:
The QueryString collection is used to retrieve the variable values in the HTTP query string.  Using this technique I will add my data with URL and on the next page will grab it.

 protected void QueryStringButton_Click(object sender, EventArgs e)

          {

              Response.Redirect("QueryStringPage.aspx?Data=" + Server.UrlEncode(DataToSendTextBox.Text));

         }

2. Use HTTP POST:
The Hypertext Transfer Protocol (HTTP) is a communication protocol that is designed to enable request-response between clients and servers.  Using this technique I will call a post back url and the on next page using Request.From I will grab it.

 <asp:Button ID="HttpPostButton" runat="server" Text="Use HttpPost" 

              PostBackUrl="~/HttpPostPage.aspx" onclick="HttpPostButton_Click"/>

 protected void HttpPostButton_Click(object sender, EventArgs e)

         {

      // The PostBackUrl property of the Button takes care of where to send it!

         }

3. Use Session State:
Sessions can be used to store even complex data for the user just like cookies. Actually, sessions will use cookies to store the data, unless you explicitly tell it not to. Sessions can be used easily in ASP.NET with the Session object. Using this technique I will store the data in session variable on the client machine and on the next page will grab it. Using Application Variable instead of Session Variable is recommended by experts.

    protected void SessionStateButton_Click(object sender, EventArgs e)

          {

              Session["Data"] = DataToSendTextBox.Text;

              Response.Redirect("SessionStatePage.aspx");

         }

4.  Use public properties:
Properties are not just to provide access to the fields; rather, they are supposed to provide controlled access to the fields of our class. Using this technique I will send the using a public method and on the next page will grab it using PreviousPage.MethodName.

    public string DataToSend

         {

             get

             {

                  return DataToSendTextBox.Text;

              }

         }

         protected void PublicPropertiesButton_Click(object sender, EventArgs e)

          {

              Server.Transfer("PublicPropertiesPage.aspx");

         }

5. Use PreviousPage Control Info:
Using this technique I will just redirect the user on next page and on the next page will use PreviousPage.FindControl to grab the data.

 protected void ControlInfoButton_Click(object sender, EventArgs e)

          {

              Server.Transfer("ControlInfoPage.aspx");

         }

   // target page:

 protected void Page_Load(object sender, EventArgs e)

         {

             var textbox = PreviousPage.FindControl("DataToSendTextbox") as TextBox;

              if (textbox != null)

             {

                 DataReceivedLabel.Text = textbox.Text;

             }

         }

6. Use HttpContext Items Collection:

   protected void HttpContextButton_Click(object sender, EventArgs e)

          {

              HttpContext.Current.Items["data"] = DataToSendTextBox.Text;

              Server.Transfer("HttpContextItemsPage.aspx");

         }

 // target page:

 protected void Page_Load(object sender, EventArgs e)

          {

              this.DataReceivedLabel.Text =(String) HttpContext.Current.Items["data"];

         }

7. Use Cookies:
Cookies are small pieces of text that are passed between browser and web server with every request. As a consequence, their values are available to any page within the site. Cookies are commonly used to store user preferences which help the site remember which features to turn on or off, for example. They might be used to record the fact that the current user has authenticated and is allowed to access restricted areas of the site. It is the browser's job to store persistent cookies as text files on the client machine. The storage duration is determined by the type of cookie and the expiry date that it is given. Cookies with no expiry date are not stored on the client machine and are cleared at the end of the user's session.

 protected void CookiesButton_Click(object sender, EventArgs e)

         {

             HttpCookie cook =  new HttpCookie("data");

             cook.Expires = DateTime.Now.AddDays(1);

             cook.Value = DataToSendTextBox.Text;

              Response.Cookies.Add(cook);

              Response.Redirect("HttpCookiePage.aspx");

         }

 // target page:

 protected void Page_Load(object sender, EventArgs e)

         {

             DataReceivedLabel.Text = Request.Cookies["data"].Value;

         }

8. Use Cache:
The Cache is primarily intended to be used to improve performance of web pages, in that you can add any arbitrary object to it and retrieve it at will. Cache items are stored in memory on the server, and can be considered as special global variables. In fact, pre-ASP.NET, Application state used to be treated as a kind of cache. The difference between Application variables and Cache is that Cache offers a management API. In Web Pages, cache is managed via a WebCache helper. When you want to add something to the Cache, you use the WebCache.Set method. This method takes four parameters: the name you want to give the cache item, the item itself, the number of minutes that the item should remain in the Cache (default: 20) and whether those minutes should restart everytime the item is referenced or not (default: true). This is called Sliding Expiration.

 protected void CacheButton_Click(object sender, EventArgs e)

          {

              Cache["data"] = DataToSendTextBox.Text;

              Server.Transfer("CachePage.aspx");

         }

    // target page:

     protected void Page_Load(object sender, EventArgs e)

          {

              this.DataReceivedLabel.Text = (string) Cache["data"];

         }

ASP.NET is built on the .NET framework, which provides an application program interface (API) for software programmers. The .NET development tools can be used to create applications for both the Windows operating system and the Web. You've probably heard the word ASP.net fairly often these days, especially on developer sites and news. This article will explain what the fuss is all about. ASP.NET is not just the next version of ASP; it is the next era of web development. ASP.NET allows you to use a full featured programming language such as C# (pronounced C-Sharp) or VB.NET to build web applications easily.

New version of ASP.NET, .Net 4.5.2 was released on May 5th. Starting with the recently released version 4.5.2 of the .NET Framework, ASP.NET now supports the HostingEnvironment.QueueBackgroundWorkItem which lets you queue background threads from within an ASP.Net web application.

Well, the new HostingEnvironment.QueueBackgroundWorkItem method that lets you schedule small background work items. ASP.NET tracks these items and prevents IIS from abruptly terminating the worker process until all background work items have completed. These will enable ASP.NET applications to reliably schedule Async work items.

Remember that the QueueBackgroundWorkItem can only be called inside an ASP.NET managed app domain. It won't work if the runtime host is either Internet Explorer or some Windows shell. This is useful for long running tasks that don’t need to complete before returning a response to the user.

 using System;

 using System.Diagnostics;

 using System.Threading;

 using System.Threading.Tasks;

 using System.Web.Hosting;

 using System.Web.Mvc; 

 namespace QueueBackgroundWorkItem.Controllers

 {

     public class HomeController : Controller

     {

         // notice that the action did need to be declared async

         public ActionResult Index()

         {

             Func<CancellationToken, Task> workItem = DelayWrite;

             HostingEnvironment.QueueBackgroundWorkItem(workItem);

              // the view is returned before the work item is complete

            return View();

         } 

         // Background work items should use async/await to avoid tying up IIS threads

         // the runtime will provide the cancellation token

         private async Task DelayWrite(CancellationToken cancellationToken)

         {

             // perform a long running operation, e.g. network service call, computation, file IO

             await Task.Delay(5000);

             Trace.WriteLine("Executed from a background work item");         

         }  

     }

 }

ASP.NET 4.5.2 is the latest ASP.NET version; it is a highly compatible, in-place update to the .NET Framework 4, 4.5 and 4.5.1. The new ASP.NET 4.5.2 some new features that very useful for ASP.NET developer. What's new in this release of .NET 4.5.2 Framework?

• New APIs for ASP.NET apps;
• Resizing in Windows Forms controls;
• New workflow features;
• Profiling improvements;
• Debugging improvements;
• Event tracing changes.
  

  

Well, now I will be talking about one of them. It is about “Event tracing”. As you know that Event Tracing for Windows or ETW is an efficient kernel-level tracing facility that lets you log kernel or application-defined events to a log file. It makes you can consume the events in real time or from a log file and use them to debug an application or to determine where performance issues are occurring in the application.

And not only that, ETW has more function again. ETW lets you enable or disable event tracing dynamically, allowing you to perform detailed tracing in a production environment without requiring computer or application restarts. Use ETW when you want to instrument your application, log user or kernel events to a log file, and consume events from a log file or in real time.

In the new ASP.NET 4.5.2 Event Tracing has great change. The new .NET Framework 4.5.2 enables out-of-process, Event Tracing for Windows based activity tracing for a larger surface area. Not only that, this enables Advanced Power Management (APM) vendors to provide lightweight tools that accurately track the costs of individual requests and activities that cross threads. These events are raised only when ETW controllers enable them; therefore, the changes don’t affect previously written ETW code or code that runs with ETW disabled.

Are you interest with other new features in ASP.NET 4.5.2? So just stay tune in this blog. We will always give you up to date news about ASP.NET.

Finally, the long awaited release of ASP.NET 4.5.2, ASPHostPortal are happy to announce the availability of the .NET Framework 4.5.2 for all our hosting packages. It is a highly compatible, in-place update to the .NET Framework 4, 4.5 and 4.5.1.

The Microsoft .NET Framework 4.5.2 is a highly compatible, in-place update to the Microsoft .NET Framework 4, Microsoft .NET Framework 4.5 and Microsoft .NET Framework 4.5.1.

The .NET Framework 4.5.2 Preview is the first update of .NET Framework 4.5. It contains critical fixes, improvements, and opt-in features and is part of the Visual Studio 2013 and Windows 8.1 Previews. But it is also available as direct download without the requirement of having an existing .NET Framework 4.5 installation.

The .NET 4.5.2 Preview Framework update provides some fixes and multiple performance enhancements. There are no major language features, but nonetheless those upgrades become very handy and will allow for a more seamless and productive software development experience.

The .NET Framework 4.5.2 contains a variety of new features, such as:

• ASP.NET improvements
• High DPI Improvements - As part of recently released .NET 4.5.2, Windows Forms is seeing some improvements for its high DPI support.
• Distributed transactions enhancement - This service provides applications with a way to support transactions that span multiple processes or even multiple machines.
• More robust profiling
• Improved activity tracing support in runtime and framework - The .NET Framework 4.5.2 enables out-of-process, Event Tracing for Windows (ETW)-based activity tracing for a larger surface area.
• Event tracing changes - The ASP.NET Framework 4.5.2 enables out-of-process, Event Tracing for Windows (ETW)-based activity tracing for a larger surface area. This enables Advanced Power Management (APM) vendors to provide lightweight tools that accurately track the costs of individual requests and activities that cross threads.

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In this article I’m going to explain how to integrate ASP.NET applications in facebook.
Facebook has provided functionality that extends the Facebook Platform to any website that wants to integrate Facebook APIs for user authentication, sharing website content with friends, and publishing feed stories to generate traffic.
Here I’ll show you how to integrate ASP.NET Apps in Facebook.  Please follow the steps given below.

Setting up Facebook App

• To create facebook app click on Developer section
• Click on Set up New App button.
• Agree Facebook terms and click on Create App
• Put Security Check keywords.
• Click on Submit.
• Fill basic information about app

• Click on Facebook Integration tab.
• Put Name of Canvas page.
• Before putting URL of webpage of your website, I want to show how your page can get callback from facebook app. So first we create webpage in our website:
• Create asp.net website in Visual studio.
• Add reference of Facebook.dll from “C:\Program Files\Coding4Fun\Facebook\Binaries”. This dll will be placed after installing Facebook Developer kit on your machine.
• Create instance of FacebookService object. you can copy facebook app api key and secret key from application page on facebook in source code.

put above values in FACEBOOK_API_KEY and FACEBOOK_SECRET constants respectively.
you can get user_id of facebook who requested this application by calling
string userId = Session["Facebook_userId"] as String;

you can also get many information about user like name, sex, location,friends etc.
User usr=_fbService.GetUserInfo();

Source Code:

using System;
using Facebook;
public partial class Facebook_ConnectFacebook : System.Web.UI.Page
{
    Facebook.Components.FacebookService _fbService = new Facebook.Components.FacebookService();
    private const string FACEBOOK_API_KEY = "191856207506775";
    private const string FACEBOOK_SECRET = "820c0b05b14a09365e072c8d37a8c49f";

    protected void Page_Load(object sender, EventArgs e)
    {
        _fbService.ApplicationKey = FACEBOOK_API_KEY; _fbService.Secret = FACEBOOK_SECRET;
        _fbService.IsDesktopApplication = false;
        string sessionKey = Session["Facebook_session_key"] as String;
        string userId = Session["Facebook_userId"] as String;
       
    // When the user uses the Facebook login page, the redirect back here
    // will will have the auth_token in the query params
       
    string authToken = Request.QueryString["auth_token"];
       
    // We have already established a session on behalf of this user
        if (!String.IsNullOrEmpty(sessionKey))
        {
            _fbService.SessionKey = sessionKey; _fbService.UserId = userId;
        }
        // This will be executed when Facebook login redirects to our page        
        else if (!String.IsNullOrEmpty(authToken))
        {
            _fbService.CreateSession(authToken);
            Session["Facebook_session_key"] = _fbService.SessionKey;
            Session["Facebook_userId"] = _fbService.UserId;
            Session["Facebook_session_expires"] = _fbService.SessionExpires;
        }
        // Need to login        
        else
        {
            Response.Redirect(@"http://www.Facebook.com/login.php?api_key=" + _fbService.ApplicationKey + @"&v=1.0\");
        }

        User usr = _fbService.GetUserInfo();
        string t = string.Format("User Name:{0}, Sex:{1}, Location: {2}", usr.Name, usr.Sex, usr.CurrentLocation.City);
        Response.Write(t);
    }
}

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The next version of the .NET Framework is .NET 4.5.1. It has been published as Preview version as announced yesterday during the BUILD conference. The new update builds on top of .NET 4.5 and includes new features such as async-aware debugging, ADO.NET idle connection resiliency, and ASP.NET app suspension. ASPHostPortal.com, a leading innovator in Windows Server hosting, announces a Free Trial ASP.NET 4.5.1 hosting on Windows Server 2012 R2 for the developer community.

Microsoft Visual Studio 2012 is loaded with new capabilities for Windows 8, the web, SharePoint, mobile, and cloud development—as well as the application management lifecycle tools you need to break down team barriers and reduce cycle times to deliver value continuously.

Visual Studio 2012 is New versions of Visual Studio usually coincide with updates to the .NET Framework and one of our biggest releases yet. It comes purpose-built to help you thrive in an environment in which ideas are at a premium and speed is of the essence.

This Article can tell you how to publish your asp.net 4.5 site in vistul studio 2012.
Steps to Publish Web Application in Visual Studio 2012:
Step 1: Right click on the web project in the solution explorer window and then select the option Publish.

Step 2: Publish Web Application Window will open .Here under the option Select or Import a publish profile Select the option New in the drop down.

Step 3: In New Profile Window give any name to Profile and then click on Ok.

Step 4: Next in Connection Select the Publish method File System.

Step 5: Again in Connection for Target location select the folder on your computer where you want to publish the web application and then click on Next Button.
Step 6: In Settings Select the Configuration Release in the drop down and then click on Next Button.

Step 7: Finally in the Preview Click on Publish to Publish the web Project to  folder selected in the Step 5 above.

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Designers need a solid foundation that gives us almost everything a typical website would require but is flexible enough for customization. Thanks to hundreds of hours spent by some developers and companies, we now have dozens of CSS Frameworks to choose from. Among all the available CSS frameworks out there, Bootstrap is my favorite and also one of the most widely used.

Bootstrap is the new technology that is integrated with the ASP.NET web project templates. It is builtin with the projects that provides responsive design and theming capabilities. Bootstrap is a sleek and powerful front-end framework for faster web development. The project templates based on bootstrap technology provides attractive themes for the web development. Bootstrap is front-end framework for easy and faster web development. This post explains how to use Bootstrap in  ASP.NET applications and outlines some of the features of this framework. Create a new ASP.NET project in Visual Studio 2013 and execute it then you will see the look and feel of the page as below.

If you want to get the above look without using Bootstrap then you have to write lot of custom CSS. Now all ASP.NET default templates like MVC, Web forms, Single Page applications and Web API are using Bootstrap framework. Bootstrap version 3 is integrated in Visual Studio 2013. The above screen scales well on different devices. If you look at the CSS code to achieve is very few lines as shown below

In order to get the Bootstrap into your project, go to Manage NuGet packages window and type Bootstrap in search box then you will find the package

Once you install the package then it brings the following files into your project, All the CSS and JavaScript files related Bootstrap framework are bundled for you to get you better performance.

Another integration feature for Bootstrap is Bootswatch, which helps you to theme your site. To apply theme to your site go to Bootswatch site and choose the theme which you like and download and copy the CSS and overwrite the  Bootstrap.css in your project. After applying one of the sample free theme then the site looks as below, In matter of seconds you can quickly change the theme of your site.
Another key feature of Bootstrap is dealing with the images, it makes the image experience as responsive without writing any code! just use the class name img-responsive.

It adds the responsive behaviour to the image and it make sure to render nicely in your site.

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