Dev Source Code: 2011

Saturday, December 3, 2011

HTML 5 async attribute

Async attribute can be used to load an external file and allows developers to load the file asynchronously. So, this means async attribute load the script in the background as soon as script is available without causing other page elements to delay while it loads.

<script async src="Script.js" onload="Init()"></script>

async attribute would benefit the user experience if the script is loaded as soon as possible, rather than after the page loads. So, this attribute will speed up the web by loading script asynchronously.

Saturday, November 12, 2011

ASP.NET vNEXT - Strongly Typed Data Controls

The next release of ASP.NET provides the ability to have strongly-typed data templates on data controls and introduces new property called "ModelType". This property has two expressions: Item and BindItem. And, also provides full Intellisense and compile-time checking support.

This means developers who used Eval() and Bind() helper methods to bind data into a control,

First Name: <%# Eval("FirstName") %><br />

<asp:TextBox ID="firstName" runat="server" Text='<%# Bind("FirstName") %>' />

can use the property called "ModelType" on data controls introduced in ASP.NET vNEXT as below:

<asp:TextBox ID="firstName" Text='<%# BindItem.FirstName %>' runat="server" />

Monday, September 19, 2011

ASP.NET MVC 4 Developer Preview for Visual Studio 2010

Microsoft has released MVC 4 Developer Preview for Visual Studio 2010 and available to download from ASP.NET MVC 4 Developer Preview. ASP.NET MVC 4 can be installed and run with ASP.NET MVC 3 side-by-side.

Software Requirements:
1. .NET 4.o
2. Visual Studio 2010 SP1 or Visual Web Developer Express 2010

New features:
1. Enhanced ASP.NET MVC 4 project template allows you to create more modernized websites. The size of website is adjusted according to screen resolution.
2. Mobile project template - Develop web applications that can run on any phone. The MVC4 mobile template is based on JQuery Mobile framework.
3. Enhanced support for asynchronous methods.

Tuesday, September 6, 2011

HTML 5 Input Type - Number

HTML 5 Number Input type control allows user to increase or decrease the value of the textbox by clicking on up or down arrow buttons. As of today, only Chrome 13 and Safari 5 support this feature.

<!DOCTYPE html>
<html>
<head>     
    <title>Testing HTML 5 Number Input Type</title>
</head>
<body>
   <form>
        <label for="date">
            Please enter date:
            <input type="number" name="date" id="date"
                min="1" max="31" step="1" value="15">              
        </label>
    </form>
</body>
</html

Friday, September 2, 2011

Method Overloading in ASMX and WCF services

Both ASMX and WCF services do not support method overloading by default. However, it is possible to enable method overloading with ASMX or WCF service by decorating a ASMX web method or a WCF method as follows.

In ASMX:

[WebMethod (MessageName="HelloWorld")]
public string HelloWorld()
{
return "HelloWorld";
}

[WebMethod (MessageName="HelloWorldWithName")]
public string HelloWorld(string name)
{
return "HelloWorld " + name;
}

In WCF:

[ServiceContract]
public interface IMyCalculator
{
[OperationContract(Name="AddFloats")]
float Add(float operand1, float operand2);

[OperationContract(Name="AddIntegers")]
int Add(int operand1,int operand2);
}

Thursday, September 1, 2011

Silverlight 5 Release Candidate is available to download.

Microsoft has published (8/31/2011) Silverlight 5 Release Candidate and available to download from the following link.
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=27220

Tuesday, August 30, 2011

HTML 5 support in Visual Studio 2010

HTML 5 support in Visual Studio 2010 was something development community was asking for a long time. Web Standards Update for Microsoft Visual Studio 2010 SP1 adds support to Visual Studio and the editor for HTML5 and CSS3 and provides intellisense and validation according to W3C specification.
http://visualstudiogallery.msdn.microsoft.com/a15c3ce9-f58f-42b7-8668-53f6cdc2cd83

Tuesday, August 23, 2011

How to enable WCF Tracing?

Tracing is not enabled by default. Trace source should be defined in the assembly level. The System.ServiceModel and System.ServiceModel.MessageLogging are the most important and frequently used WCF trace sources.

For each trace source trace listener should be defined. You can configure tracing by editing the web.config for web-hosted applications, or Appname.exe.config for self-hosted applications.

<configuration>
<system.diagnostics>
   <sources>
    <source name="System.ServiceModel" switchValue="Information, ActivityTracing" propagateActivity="true">
    <listeners>
   <add name="traceListener"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData= "c:\log\Traces.svclog" />
    </listeners>
   </source>
</sources>
</system.diagnostics>
</configuration>

You can also configure each trace source to use the same shared listener, as shown below.

<configuration>
<system.diagnostics>
   <sources>
    <source name="System.ServiceModel"
switchValue="Information, ActivityTracing"
propagateActivity="true">
     <listeners>
      <add name="xml" />
       </listeners>
        </source>
         <source name="CardSpace">
       <listeners>
     <add name="xml" />
   </listeners>
</source>
<source name="System.IO.Log">
<listeners>
   <add name="xml" />
     </listeners>
      </source>
       <source name="System.Runtime.Serialization">
     <listeners>
    <add name="xml" />
</listeners>
   </source>
      <source name="System.IdentityModel">
       <listeners>
          <add name="xml" />
       </listeners>
   </source>
</sources>

<sharedListeners>
<add name="xml"
type="System.Diagnostics.XmlWriterTraceListener"
initializeData="c:\log\Traces.svclog" />
</sharedListeners>
</system.diagnostics>
</configuration>

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