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Friday, January 15, 2010

ASP.NET Page Life Cycle Overview

Page Event

Typical Use

PreInit

Use this event for the following:

· Check the IsPostBack property to determine whether this is the first time the page is being processed.

· Create or re-create dynamic controls.

· Set a master page dynamically.

· Set the Theme property dynamically.

· Read or set profile property values.

Note:

If the request is a postback, the values of the controls have not yet been restored from view state. If you set a control property at this stage, its value might be overwritten in the next event.

Init

Raised after all controls have been initialized and any skin settings have been applied. Use this event to read or initialize control properties.

InitComplete

Raised by the Page object. Use this event for processing tasks that require all initialization be complete.

PreLoad

Use this event if you need to perform processing on your page or control before the Load event.

Before the Page instance raises this event, it loads view state for itself and all controls, and then processes any postback data included with the Request instance.

Load

The Page calls the OnLoad event method on the Page, then recursively does the same for each child control, which does the same for each of its child controls until the page and all controls are loaded.

Use the OnLoad event method to set properties in controls and establish database connections.

Control events

Use these events to handle specific control events, such as a Button control's Click event or aTextBox control's TextChanged event.

Note:

In a postback request, if the page contains validator controls, check the IsValid property of the Page and of individual validation controls before performing any processing.

LoadComplete

Use this event for tasks that require that all other controls on the page be loaded.

PreRender

Before this event occurs:

· The Page object calls EnsureChildControls for each control and for the page.

· Each data bound control whose DataSourceID property is set calls its DataBind method. For more information, see Data Binding Events for Data-Bound Controls later in this topic.

The PreRender event occurs for each control on the page. Use the event to make final changes to the contents of the page or its controls.

SaveStateComplete

Before this event occurs, ViewState has been saved for the page and for all controls. Any changes to the page or controls at this point will be ignored.

Use this event perform tasks that require view state to be saved, but that do not make any changes to controls.

Render

This is not an event; instead, at this stage of processing, the Page object calls this method on each control. All ASP.NET Web server controls have a Render method that writes out the control's markup that is sent to the browser.

If you create a custom control, you typically override this method to output the control's markup. However, if your custom control incorporates only standard ASP.NET Web server controls and no custom markup, you do not need to override the Render method.

A user control (an .ascx file) automatically incorporates rendering, so you do not need to explicitly render the control in code.

Unload

This event occurs for each control and then for the page. In controls, use this event to do final cleanup for specific controls, such as closing control-specific database connections.

For the page itself, use this event to do final cleanup work, such as closing open files and database connections, or finishing up logging or other request-specific tasks.

Note:

During the unload stage, the page and its controls have been rendered, so you cannot make further changes to the response stream. If you attempt to call a method such as the Response.Writemethod, the page will throw an exception.

Wednesday, January 13, 2010

Whats are the New Features in Microsoft Office 2010


1. Built-In Screen Capture Tool

A really handy addition & at the same time a beautiful implementation of the same. Word & Powerpoint both have the ‘Screenshot’ feature under ‘Insert’ & the useful part is that it caches screen shots of the currently open windows for one-click insert. At the same time also gives you the marquee select option.

2. Background Removal Tool (for images)

A new addition to picture properties is ‘Background Removal’.

3. Protected Mode

Every time you download a document from the internet & open it, Word 2010 will open it in a ‘Protected mode’ that won’t allow you to edit the document unless you enable editing of the document. You can edit which file types are to be opened in the protect mode from the Trust Center panel.

4. New Smart Art Templates

Smart Art It’s right up there amongst the best features in Office and in Office 2010 there are new templates added. Existing categories have new templates & there’s a new category as well.

5. Author Permissions

Co-authoring a document & collaborating over the Internet will be one of Office 2010’s USPs, the ‘Protect Document’ option under ‘Review’ in Office 2007 has now been renamed to ‘Restrict Editing’ & a new tab titled ‘Block Authors’ has been added.

6. Completely Revamped Options Under the Office Button

Office 2010 has introduced a huge a change in the document options that are presented to you under the Office button. One of biggest pains was the meta-data that can be added in a
document. Quick access to permissions, document meta-data under document info. With Office 2010 you now have the option of saving your document to a SharePoint location as well.

7. Print Control Panel Under the Office Button

This is a fantastic addition, clicking ‘Print’ under the Office 2010 button opens a plethora of printing options. No need go through a ‘Print Wizard’ you can select all your print options from here & hit print.

8. Jumplists in Outlook 2010

As you’ll might have seen, Outlook 2010 now makes use of Windows 7’s Jumplist feature for quick access to certain processes.

9. Broadcast Presentations To Your Clients

Now you can broadcast your presentations by sending the intended viewer a URL, this works along with Office Live Workspaces & you need an account of the same.

10. Inserting & Editing Videos Is Painless & Fun

11. Compress Media While Saving Presentations

The all new file menu, known as — Backstage gives you options to compress the media files inserted in the presentation to reduce file size, it even gives an esitmate of the presentation size.

12. New Animations & Slide Transitions

My favorite from the new ones is the Gallery transition effect. Another addition to transitions is that the % can be defined.

13. Save File Notification

When closing an unsaved file Office 2010 now lets you know that it has auto-saved a draft.

14. Hide Ribbon

With Office 2010, a cleaner interface has been worked upon. There is now a single-click show/hide option for the Ribbon.


Wednesday, January 6, 2010

What is 'GodMode' in Windows 7

Although its name suggests perhaps even grander capabilities, Windows enthusiasts are excited over the discovery of a hidden "GodMode" feature that lets users access all of the operating system's control panels from within a single folder.

By creating a new folder in Windows 7 and renaming it with a certain text string at the end, users are able to have a single place to do everything from changing the look of the mouse pointer to making a new hard-drive partition.

The trick is also said to work in Windows Vista, although some are warning that although it works fine in 32-bit versions of Vista, it can cause 64-bit versions of that operating system to crash.

To enter "GodMode", one need only create a new folder and then rename the folder to the following:

GodMode.{ED7BA470-8E54-465E-825C-99712043E01C}

Once that is done, the folder's icon will change to resemble a control panel and will contain dozens of control options. I'm not sure it's my idea of playing God, but it is a handy way to get to all kinds of controls.

I've asked Microsoft for more details on the feature and how it came to be. But so far, Redmond is silent on the topic.

This article was first published as a blog post on CNET News.
Source : http://www.zdnetasia.com/news/software/0,39044164,62060303,00.htm?scid=rss_z_nw


How to Encrypt or Decrypt Connection Strings in ASP .Net 3.5


We can encrypt the section of a web configuration file (web.config).

After the Encryption of Connection Strings is done, you will notice a change in web.config file, that the contents of the section are no longer visible.

However, an ASP.NET page can continue to read the values of the Corresponding Database (For e.g. GuestBook connections string by using the <%$ ConnectionStrings:GuestBook %> expression.

The easiest way to encrypt the section is to use the aspnet_regiis
command-line tool. This tool is located in the following folder:

C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\

Executing the following command encrypts the section of a
Web.Config file located in a folder with the path c:\Websites\myGuestBook

aspnet_regiis -pef connectionStrings “c:\Websites\ myGuestBook”

The -pef option (Protect Encrypt Filepath) encrypts a particular configuration section
located at a particular path.

You can decrypt a section with the -pdf option like this:

aspnet_regiis -pdf connectionStrings “c:\Websites\myGuestBook”


how do you programmatically raise a button-click event


You can use the following C# code raise the event:

((IPostBackEventHandler)Button1).RaisePostBackEvent(null);

This code will raise the button-click event for Button1 just as though the user clicked the button. Since we are passing a null as the EventArgs for the event, the registered methods must not attempt to do anything with it. Or, you could create an EventArgs object and pass it.