.Net Special Support: November 2011

Sunday, 20 November 2011

Difference between Session object and Application object in asp.Net

Session variables are used to store user specific information where as in application variables we can't store user specific information.

Default lifetime of the session variable is 20 mins and based on the requirement we can change it.Application variables are accessible till the application ends.

sessions allows information to be stored in one page and accessed in another,and it supports any type of object, including your own custom data types. Application state allows you to store global objects that can be accessed by any client.

The common thing between session and application is both support the same type of objects,retain information on the server, and uses the same dictionary -based syntax.

Tuesday, 15 November 2011

What methods are fired during the page load?

Init() - when the page is instantiated
Load() - when the page is loaded into server memory
PreRender() - the brief moment before the page is displayed to the user as HTML
Unload() - when page finishes loading.

difference between Inline and Codebehind code in asp.net ?

Inline Code is mixing client and serverside code on the same page like HTML and JavaScript. So precompilation is no need.
CodeBehind .aspx separately only for serverside code. So it provides good performance than inline code. Why because CodeBehind needs to be compile in advance.

Thursday, 10 November 2011

Generate Excel files without using Microsoft Excel

http://www.codeproject.com/KB/office/biffcsharp.aspx

Wednesday, 9 November 2011

Google API to get distance between two cities.

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
    <title>Google Maps JavaScript API Example: Extraction of Geocoding Data</title>
    <script src="http://maps.google.com/maps?file=api&v=2&key=ABQIAAAA7j_Q-rshuWkc8HyFI4V2HxQYPm-xtd00hTQOC0OXpAMO40FHAxT29dNBGfxqMPq5zwdeiDSHEPL89A" type="text/javascript"></script>

    <script type="text/javascript">

    var geocoder, location1, location2;
    function initialize() {
        geocoder = new GClientGeocoder();
    }

    function showLocation() {
        geocoder.getLocations(document.forms[0].address1.value, function (response) {
            if (!response || response.Status.code != 200)
            {
                alert("Sorry, we were unable to geocode the first address");
            }
            else
            {
                location1 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
                geocoder.getLocations(document.forms[0].address2.value, function (response) {
                    if (!response || response.Status.code != 200)
                    {
                        alert("Sorry, we were unable to geocode the second address");
                    }
                    else
                    {
                        location2 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
                        calculateDistance();
                    }
                });
            }
        });
    }

    function calculateDistance()
    {
        try
        {
            var glatlng1 = new GLatLng(location1.lat, location1.lon);
            var glatlng2 = new GLatLng(location2.lat, location2.lon);
            var miledistance = glatlng1.distanceFrom(glatlng2, 3959).toFixed(1);
            var kmdistance = (miledistance * 1.609344).toFixed(1);

            document.getElementById('results').innerHTML = '<strong>Address 1: </strong>' + location1.address + '<br /><strong>Address 2: </strong>' + location2.address + '<br /><strong>Distance: </strong>' + miledistance + ' miles (or ' + kmdistance + ' kilometers)';
            //document.getElementById('results').innerHTML = '<strong>Distance: </strong>' + miledistance + ' miles (or ' + kmdistance + ' kilometers)';
        }
        catch (error)
        {
            alert(error);
        }
    }

    </script>
</head>

<body onload="initialize()">

    <form action="#" onsubmit="showLocation(); return false;">
      <p>
        <input type="text" name="address1" value="Address 1" class="address_input" size="40" />
        <input type="text" name="address2" value="Address 2" class="address_input" size="40" />
        <input type="submit" name="find" value="Search" />
      </p>
    </form>
    <p id="results"></p>

</body>
</html>

Saturday, 5 November 2011

How to zoom In and zoom Out image in asp.net through javascript

ASPX Code :
<div>
    <img border="0" src="img1.jpg" width="100"height="100"
    onmouseover="zoom('247px','268px','296px','336px',this);"
    onmouseout="zoom('47px','68px','47px','68px',this);" />
    </div>
JavaScript Java :
   <script language="javascript" type="text/javascript" >
    var nW,nH,oH,oW;
    function zoom(iWideSmall,iHighSmall,iWideLarge,iHighLarge,whichImage)
    {
        oW=whichImage.style.width;
        oH=whichImage.style.height;
        if((oW==iWideLarge)||(oH==iHighLarge))
        {
            nW=iWideSmall;
            nH=iHighSmall;
        }
        else
        {
            nW=iWideLarge;
            nH=iHighLarge;
        }
        whichImage.style.width=nW;
        whichImage.style.height=nH;
    }
</script>

Friday, 4 November 2011

Reduce Page Loading Time

http://www.appelsiini.net/projects/lazyload