Find Age

To Find the age of a person there is another class avaliable in VS
C#

TimeSpan
Datetime myBirthday=DateTime.Parse("7/7/1982");
TimeSpan objTimeSpan=DateTime.Now.Subtract(myBirthDay);

How to find if the assembly is strongly named

Three ways to tell if a .NET Assembly is Strongly Named (or has Strong Name)

Approach #1: Testing for Strong Name on Command Line or in a Script
Approach #2: Viewing Strong Name Details with IL DASM
Approach #3: Viewing Strong Name Details with Reflector

for details refer
http://blog.codingoutloud.com/2010/03/13/three-ways-to-tell-whether-an-assembly-dl-is-strong-named/

Jquery Tabs

There are some common fuctions for tabs

Property
Default Value
Usage

ajaxOptions
{}
Options for remote AJAX tabs

cache
"false"
Load remote tab content only once (lazy-load)

cookie
null
Show active tab using cookie data on page load

disabled
[]
Disable specified tabs on pageload

idPrefix
"ui-tabs-"
Used when a remote tab's link element has no title attribute

event
"click"
Tabs event that triggers display of content

fx
null
Specify a transition effect when changing tabs

panelTemplate

A string specifying the elements used for the content section of a dynamically created tab

selected
0
The tab selected by default when the widget renders

spinner
"Loading&#B230"
Specify the loading spinner for remote tabs

tabTemplate

#{label}

A string specifying the elements used when creating new tabs dynamically

unselect
false
Hides an already selected tab when it is clicked

Property
Default Value

disabledCLass
"ui-tabs-disabled"

hideClass
"ui-tabs-hide"

loadingClass
"ui-tabs-loading"

navClass
"ui-tabs-nav"

panelClass
"ui-tabs-panel"

selectedClass
"ui-tabs-selected"

unselectClass
"ui-tabs-unselect

E.X.

If you want nothing should be selected on load
$(document).ready(function () {
var tabOpts = {

selected:null

};
$("#tabs").tabs(tabOpts);
});
else type 0,1,2 are index starts with 0

If you wanna disable TAB$(document).ready(function () {
var tabOpts = {

disables:[0]
};
$("#tabs").tabs(tabOpts);
});
disable first tab , change [0] to disable other or for mutliple [0,1] etc.

Transition Effects
$(document).ready(function () {
var tabOpts = {
fx: {
opacity:"toggle", duration:"slow" }
};
$("#tabs").tabs(tabOpts);
});
duration could be slow, normal, or fast

To only show the animation once, when a tab closes for example, we would need to nest the fx object within an array
$(function(){
//define config object
var tabOpts = {
fx: [{
opacity: "toggle",
duration: "slow"
},
null]
};
//create the tabs
$("#myTabs").tabs(tabOpts);
});
/script>

executable functions on an event
Property
Usage

add
Execute a function when a new tab is added

disable
Execute a function when a tab is disabled

enable
Execute a function when a tab is enabled

load
Execute a function when a tab's remote data has loaded

remove
Execute a function when a tab is removed

select
Execute a function when a tab is selected

show
Execute a function when the content section of a tab is shown

tab's custom binding events and their triggers

Event
Trigger

tabsselect
A tab is selected

tabsload
A remote tab has loaded

tabsshow
A tab is shown

tabsadd
A tab has been added to the interface

tabsremove
A tab has been removed from the interface

tabsdisable
A tab has been disabled

tabsenable
A tab has been enabled

Functions
$(function(){
//alert the id of the tab that was selected
function handleSelect(event, tab) {
alert("The tab at index " + tab.index + " was
selected");
}
//define config object
var tabOpts = {
select:handleSelect
};
//create the tabs
$("#myTabs").tabs(tabOpts);
});

Using Jquery in Master Pages

There are few things to notice :

1) try google CDN's
link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/sunny/jquery-ui.css" rel="stylesheet" type="text/css"/>
script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4/jquery.min.js" type="text/javascript">/script>
script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js" type="text/javascript">/script>

2) Put stepone in the head section of the Master page before Head Content Placeholder
head runat="server">
title>/title>
link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/sunny/jquery-ui.css" rel="stylesheet" type="text/css"/>


link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />



/head>

Add pop up message box in c#

ClientScript.RegisterStartupScript(GetType(), "Message", "");

Request.PathInfo

Request.PathInfo is a little known property that returns the path information for a resource with a URL extension

User doesnot hace permission to do this action

When you receieve this error as "User doesnot hace permission to do this action" This is maily because the application run under a process which doen't have sufficient permissions to perform action. In case of Visual Studio if you receieve tis error then it means that the ASPNET doesn't have permissions to perform this action. to overcome this errror you should do the following:
1) Give permission for the ASPNET to perform this action
2) or make your application run under another account than ASPNET.

Read about (1) and let me know too.

But for the second option use the impersonate setting account in the web config file that would resolve this issue. This would tell the ASPNET that use specified crenditials to update information.
identity impersonate="true" userName="xx" password="xx"/

I would also recommend following article with it.
http://support.microsoft.com/default.aspx?scid=kb;en-us;329290

There is a duplicate ‘system.web.extensions/scripting/scriptResourceHandler’ section defined

Above issue screwed up my head, I spent couple of hours on it and finally I got the solution. Some reasons behind these issues are

1) You might changed “sharepoint – 80” application pool’s .net framework version 2 to 4
2) You might have the web.config file in your site or sub site it contains the duplicate section of scriptresourceHandler, You should retain this section only on root web.config file.

Microsoft.Web.GeneratedImage.dll

The GeneratedImage control is a combination of an ASP.NET Web Control and a set of classes that facilitate programmatically creating, serving, caching, and transforming images. If you store images in the database that need to be served from a web page, if you need to create images on the fly, or if you need to resize, add watermarks, or perform some other image transform, then the GeneratedImage control can help.

This article looks at using the GeneratedImage control. Specifically, we'll see how to generate dynamic images on the fly based on a variety of inputs.

Dueling Assembly References

If you have a problem of Dueling Assembly References

follow below article

http://weblogs.asp.net/scottgu/archive/2006/07/30/Common-Gotcha_3A00_-Slow-VS-2005-Web-Site-Build-Performance-Because-of-_1C20_Dueling-Assembly-References_1D20_.aspx

VS Project Models

There are 2 types
VS 2005 Web Site Projects and VS 2005 Web Application Projects
1)
-->provide a project-less based model for doing web development that uses that same dynamic compilation system that ASP.NET 2.0 uses at runtime
--> while a lot of web developers love the VS 2005 Web Site model because of its "just hit save" dynamic model and flexibility.
--> no namespace is generated

2)
-->project model that uses a MSBuild based build system that compiles all code in a project into a single assembly
-->a lot of enterprise developers love the VS 2005 Web Application option because it provides a lot more build control and team integration support
--> namespace is generated automatically

To create a virtual directory in IIS 7.0 or 7.5

1) From the Start menu, click Run, then type inetmgr to open the Internet Information Services (IIS) MMC snap-in.

2) In the left pane, expand the node with the computer's name, and then expand the Sites node.

3) Right-click Default Web Site, and then select Add Application to open the Add Application window.

4) In the window, type servicemodelsamples as the alias for the virtual directory that you are creating.

5) Create the following directory: %SystemDrive%\inetpub\wwwroot\servicemodelsamples

6) Set the physical path to %SystemDrive%\inetpub\wwwroot\servicemodelsamples.
Click OK. The Web application is now created.

To set additional virtual directory properties in IIS 7.0 or 7.5

7) Click the servicemodelsamples node. Along the bottom of the window, two views are listed. Select Features View if it isn’t already selected.

8) Double-click the entry for Directory Browsing.

9) In the Actions pane, select the Enable option. This enables you to access the directory of the directory by using Internet Explorer, which helps when debugging a service.

10) Finally, you must set the security properties of the servicemodelsamples folder to allow it to be accessed by others. See below for details.

To set security properties of the folder in IIS 7.0 or 7.5

11) Navigate to %SystemDrive%\inetpub\wwwroot\servicemodelsamples.

12) Right-click the servicemodelsamples folder and click Share or Share With.

13) Click the down arrow to the left of the Add button.

14) Select the Find entry. The Select Users or Groups window opens.

15) Click Advanced.

16) Click Locations. The Locations window is now open.

17) Select the entry for the computer being used. It is important to select the local computer and not an entry for any domains or networks that are listed. After you have selected the computer, click OK.

18) Click Find Now. This populates the search results with objects associated with the local computer.

19) Find the IIS_IUSRS entry in the Name (Relative Distinguished Name) column. Select that entry and click OK to close the search results window.

20) Click OK to close the Select Users or Groups window.

21) Click Share to persist the changes.

22) After the changes to enable sharing are complete, click Done to close the File Sharing window.

How To Keep ASP.NET Session Alive

If visitor doesn't make any web request in time interval longer than specified as session timeout (20 minutes by default), session will expire. That means all session variables will be deleted. Sometimes, we want to keep session alive and wait while user is completing some long task.


Although it is possible to increase session timeout (see ASP.NET session timeout and expiration tutorial), this is not scalable option. every session variable requires some memory on server. If website has many visitors and a lot of session variables, increasing of timeout too much could spend all available memory and decrease website performances. If session timeout is increased, server will keep all sessions, including unimportant sessions from visitors who leaved website. As better solution, you can make periodical requests from client side, which will keep session alive only if browser is still showing your page. In that purpose, we can use JavaScript, jQuery, Meta Refresh or ASP.NET Ajax

How to keep ASP.NET session alive using JavaScript
ASP.NET just remembers time of last request and it doesn't know if visitor is closed browser window or is just doing something else and will return soon. It is certainly worthless to keep session values of user who leaved website. It would be better if we could keep live sessions of visitors who still have page opened.

Solution for this is to use JavaScript that will make periodic calls to some .aspx page on website, restart session timeout and keep session alive in that way. Implementation code will use JavaScript setInterval function. It could look like this:

<%--
In this example, image will be used to keep session alive,
By changing image's src parameter, we'll make periodical requests
to web server.
--%>





In this example, RefreshSessionState.aspx page will be called every minute. This is far less than default session timeout which is 20 minutes. If you just want to keep session alive, you can set this time for 19 minutes (19 * 60 * 1000 = 1140000).

But, with smaller intervals you could know almost instantly when visitor is closed a browser. If scalability is a problem, you can delete session variables almost immediately after user closed web browser. There is no need to wait 20 minutes for session to expire. You can even decrease session timeout to low value, like 2 minutes. JavaScript from previous example will make requests every minute, and keep sessions alive for active users (users that have opened web browser), but sessions where browser is closed will expire.

Since RefreshSessionState.aspx page is called every minute, you can use ASP.NET server side code for tasks like visitor tracking, how many visitors are currently online, which page each visitor is currently browsing etc.

This option will work fine, although it has its own small drawbacks. Some users could have JavaScript disabled or have a browser that doesn't support JavaScript (like some mobile web browsers). If JavaScript is not enabled, this code would not work and session will expire. Also, rarely but theoretically possible, especially on mobile browsers is, if user's Internet connection is temporally broken JavaScript will miss few requests while user is reconnecting.

This example manipulates image's src element to make request to web server. There is a second option to make web requests in JavaScript using Http Request, but this option requires browser specific code because Internet Explorer and Firefox use different objects. IE uses ActiveX object Msxml2.XMLHTTP or Microsoft.XMLHTTP, while Firefox uses XMLHttpRequest. So, final browser compatible code becomes large. In the other hand, using image's src property to make request requires

As very similar alternative we can use jQuery for same task. In this example, I will use jQuery post function to make a request to web server. Pages requested with POST are not cached, so we don't need unique URL like in previous JavaScript example.

Code for keeping ASP.NET session alive using jQuery is very short:




Keep ASP.NET session alive using Meta Refresh
One more way to keep ASP.NET session alive is by using Meta Refresh and postback. Of course, we can't refresh complete page because that will annoy visitor, especially if he or she is completing a large form. Instead of that, place small IFRAME tag somewhere on page, and set its src parameter to helper .aspx page. Let's call that page RefreshSessionState.aspx.

HTML code on main page will be: