DropDownList asp.net Control

Sometimes we need a solution where we have to append certain hardcoded values which are given in the markup and then we have to append some values from the database after these hardcoded values.

These hardcoded value can be a single item saying “Select” or “Remove” or a list of asp list items.

So if we are not following the right steps in the sequence of databinding and clearing items from the dropdownlist control, this control may act a little different as we would have thought and create havoc in our programming life.

Today while building an application i came accross the similar situation where i have two dropdownlists one is “ddlCategories ” where current categories to which a post belongs are coming form the datasource it alos has a listitem value which is hardcoded in the markup saying Remove Existing Categories which have a value of -1 and index value 0.

There is one more list called “ddlAddUserCategories” in which all the categories related to particular user are databound using the datasource.

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Difference between ADO.net Dataset and ADO Recordset

A DataSet can represent an entire relational database in memory, complete with tables, relations, and views.

· A DataSet is designed to work without any continuing connection to the original data source.
· Data in a DataSet is bulk-loaded, rather than being loaded on demand.
· There's no concept of cursor types in a DataSet.
· DataSets have no current record pointer You can use For Each loops to move through the data.
· You can store many edits in a DataSet, and write them to the original data source in a single operation.
· Though the DataSet is universal, other objects in ADO.NET come in different versions for different data sources.

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The Future of WebForms And ASP.NET MVC

ASP.NET Themes

If you watch the ASP.NET 4.0 Roadmap talk at PDC, you’ll see that there are five main areas of investment that the ASP.NET team is working on. I’ll provide a non-comprehensive brief summary of the five here.

Core Infrastructure

With our core infrastructure, we’re looking to address key customer pain points and
improve scale and performance.

One feature towards this goal is cache extensibility which will allow plugging in other cache products such as Velocity as a cache provider. We’ll also enhance ASP.NET Session State APIs. There are other scalability investments I don’t even personally understand all too deeply. ;)

To learn more about our cache extensibility plans, check out this PDC talk by Stefan Schackow.

Web Forms

In WebForms, we’re looking to address Client IDs which allow developers to control the id attribute value rendered by server controls. We’re adding support for URL routing with Web Forms. We’re planning to improve ViewState management by providing fine grain control over it. And we’re making investments in making our controls more CSS friendly. There are many other miscellaneous improvements to various control we’re making that would require me to query and filter the bug database to list, and I’m too lazy to do that right now.

AJAX

With Ajax, we’re implementing client side templates and data binding. Our team now owns the Ajax Control Toolkit so we’re looking at opportunities to possibly roll some of those server controls into the core framework. And of course, we’ve added jQuery to our offerings along with jQuery Intellisense.

To see more about our investments here, check out Bertrand Le Roy’s Ajax talk at PDC.
Data and Dynamic Data

In Dynamic Data (which technically could fall in the Web Forms bucket) we’re looking to add support for an abstract data layer which would allow for POCO scaffolding. We’re implementing many-to-many relationships, enhanced filtering, enhanced meta-data, and adding new field templates.

There’s a lot of cool stuff happening here. To get more details on this, check out Scott Hunter’s Dynamic Data talk at PDC.
ASP.NET MVC

We’re still working on releasing 1.0. In the future, we hope to leverage some of the Dynamic Data work into ASP.NET MVC.

Notice here that ASP.NET MVC is just one of these five areas we’re investing in moving forward. It’s not somehow starving our efforts in other areas.

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Advantages of ASP.NET

* Any application can talk to a host of other applications, running on diverse technology and hardware, in turn lowering the operation costs. Consider this one case, wherein the stock management system is connected to the accounting system, resulting in ample savings.
* Bring on one platform all your internal applications, your partners as well as your customers.
* Microsoft Visual Studio® .NET and the .NET Framework supports varied languages, in turn helping developers to focus on work at hand instead of trying to learn a new language that can do the job.
* Employees can look for updated information on desktop applications, internet browsers or even mobile devices.
* Optimum speed of development
* Ability of cross platform migration
* High Reliability
* Rigorous Security
* Easy configurations of applications
* Vast and enriched Class library, features, controls
* ASP.NET Framework supports varied languages

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Dot net Framework

1. What is .NET?

.NET - is the Microsoft Web services strategy to connect information, people, systems, and devices through software. Integrated across the Microsoft platform, .NET technology provides the ability to quickly build, deploy, manage, and use connected, security-enhanced solutions with Web services. .NET-connected solutions enable businesses to integrate their systems more rapidly and in a more agile manner and help them realize the promise of information anytime, anywhere, on any device. Reference


2. Which versions of .NET have been released so far?

The final version of the .NET 1.0 SDK & runtime were made publically available on 15 - Jan -2002. At the same time, the final version of Visual Studio.NET was made available to MSDN subscribers.

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DropDownList asp.net Control

Sometimes we need a solution where we have to append certain hardcoded values which are given in the markup and then we have to append some values from the database after these hardcoded values.

These hardcoded value can be a single item saying “Select” or “Remove” or a list of asp list items.

So if we are not following the right steps in the sequence of databinding and clearing items from the dropdownlist control, this control may act a little different as we would have thought and create havoc in our programming life.

Today while building an application i came accross the similar situation where i have two dropdownlists one is “ddlCategories ” where current categories to which a post belongs are coming form the datasource it alos has a listitem value which is hardcoded in the markup saying Remove Existing Categories which have a value of -1 and index value 0.

There is one more list called “ddlAddUserCategories” in which all the categories related to particular user are databound using the datasource.

Read More..

7 ways to do Performance Optimization of an ASP.NET 3.5 Web 2.0 portal

Web 2.0 applications are widely developed. These applications often work with third party contents, aggregate them make various use of them and then make something useful and meaningful to the users. For the past few years, developers were also engaged with such endeavors and a lot of their websites have not addressed performance issues, thus resulting in an unpleasant experience to the users.

Performance is a vast area and great results can never be achieved by a silver bullet. This article explores some of the key performance issues that can occur while developing a Web 2.0 portal using server side multitasking and caching. It also demonstrates model driven application development using Windows Work flow Foundation.
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An Introduction to AJAX and Atlas with ASP.NET 2.0

Traditionally, web applications have left a lot to be desired from a user experience standpoint, due primarily to the "request/response" life cycle. Any interaction with a page typically requires a post back to the web server (a "request"), which then performs any server-side tasks needed and returns the updated page's markup (the "response"). Outside of intranet-based applications, such behavior adds a bit of a lag when interacting with a page. One approach to improving the end user's experience is to use AJAX. AJAX is a technique for using JavaScript and the XMLHttpRequest object to make light-weight HTTP requests back to the web server from client-side script. Once a response is received, the web page's layout can be seamlessly refreshed using JavaScript to message the page's Document Object Model (DOM) and CSS settings. AJAX-enabled pages provide a slick, responsive user experience, making web-based applications function more like desktop-based ones.
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Are Server Controls Still Useful?

ASP.NET pages are made of code, markup tags, literal text, and server controls. Based on the request, the server controls generate the right markup language. The ASP.NET runtime combines the output of all controls and serves the client a page to display in a browser. The programming richness of ASP.NET springs from the wide library of server controls that covers the basic tasks of HTML interaction -- for example, collecting text through input tags-as well as more advanced functionalities such as calendaring, menus, tree views, and grid-based data display.

When the ASP.NET platform was introduced, server controls looked like the panacea of all evil. They were just perfect for the job making a reasonable tradeoff between performance and productivity. It goes without saying that server controls make it so easy to generate complex markup for pages. All that it requires is a simple step-by-step procedure. You drag one from the toolbox and drop it on the Web Form drawing surface. You select some of its properties and set them declaratively through Visual Studio. You point the browser to the page and see the result.

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Widgets, Gadgets, Search Bars and FUN!

Again its been far too long since I last posted, and the developments have piled up, so today I’m going to be giving you a quick update of the Students Work technical progress and then giving you my thoughts on the ASP.NET framework.

Technical Updates

- Students Work now has two new offices, one located in Rickmansworth, in Buckinghamshire where James and Marco will be based and a brand new office in Leeds city centre, which will be home for Stew and Oliver.

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Encrypt ASP.net Database Password

When connecting the ASP.net with a database. You will need to configure its database connection in the web.config file.

However exposing the sensitiive data like the password and user name in the web config file can bring big damage to your system when it being seen by unauthorized user.

In the ASP.net 2.0 this problem can solve by adding an encryption method. This encryption can be applied by normal without any programming background. To do this you will need the aspnet_regiis.exe a built in framework tool provided by Microsoft.

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