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In this article Mahesh Sabnis shows how to implement Drag and Drop in a DataGrid Row.

Source: .NET Curry

I recently had a discussion with a colleague about the capabilities of WPF for application development. We had discussions on the various new features in WPF including the capabilities of the WPF DataGrid control. The WPF DataGrid control has lots of features for data representations and manipulation. One of the nicest features of the DataGrid, is that we can change the column position using Drag-Drop. When my colleague asked me if the Drag-Drop effect is possible for the DataGridRow too, I was clueless. But this question gave me enough motivation to try my hands on implementing a Drag drop with the DataGridRow. This article demonstrates how to do so.

In this article, Mahesh Sabnis demonstrates how to use the Enterprise Library 5.0 Caching Application block in a WPF application.

Source: Dot Net Curry

In this article, I have used the Caching Application block provided in Enterprise Library 5.0. This caching framework can be manipulated through simple programming classes to store and retrieve data, to and from the cache. For the application, more than one cache can be configured. In this article I have demonstrated a simple implementation of cache for the WPF application. The application makes a call to the database table and fetches the data. The scenario is that if this data is frequently required by the application, then it will be stored in a Cache or future use. Further this can be stored in an Isolated Stored by caching it in Cache, using a Cache Manager.

Source: Dot Net Curry

NET 4.0 adds a new set of API's called Parallel Extensions, to simplify the process of adding parallelism and concurrency to applications. This allows you to effectively utilize Multi-Core systems which are commonly available now days. Parallel Extensions are composed of PLINQ and Task Parallel Library (TPL). With .NET 4.0, we have been provided a new namespace ‘System.Threading.Task’ in comprising of TPL classes. This namespace defines classes for performing Parallel looping operations, asynchronous task operations etc.

In this article Mahesh Sabnis explains how a Silverlight 4 DataGrid application may read data from a .CSV file.

Source: Dot Net Curry

I was having a discussion about an application with one of my students who was using Silverlight 4 for business application development. During the discussion, he told about me a scenario in his application, where the data instead of coming from a database using WCF service or for that matter any other service, was instead coming from the File system (or downloaded from the Web Host etc.). His question was how could we read this data and bind it to a Silverlight 4 DataGrid application. This discussion drove me to develop a simple Proof-of-Concept (POC) and present it in the form of an article. I hope you all benefit from it. For this article, I have used a Comma-Separated-Values (.csv) file.

In this article, Mahesh Sabnis shows how to establish communication between two Views of the same Module (intra-module) or two Views of different Modules in Silverlight 4 and Prism 4.

Source: Dot Net Curry

A lot of times, we think of using patterns in our Silverlight applications for implementing loose-coupling, modularity, reusability etc. Using MVVM/Prism can make this possible. Prism 4 has provided several features for implementing such type of applications. Typically Modularity is one of the most important segments in Prism. A Module contains application specific logic, models, views etc. We can say that our Prism enabled Silverlight application consist of several such Modules. In such cases, based upon a business requirement, it is necessary to establish communication between two Views of the same Module (intra-module) or two Views of different Modules. So the question is how we can achieve this.

In this article, Mahesh Sabnis explains how to use DelegateCommand for implementing loosely coupled applications in Silverlight 4 using Prism 4.

Source: Dot Net Curry

For developing loosely coupled applications using Silverlight 4 or WPF, it is suggested that Prism 4 libraries be used in most scenarios. These libraries provide various features like Modularity, UI Composition, EventAggregator, MVVM using DelegateCommand and CompositeCommand etc. All these features are important for building Composite applications.

In this article, Mahesh Sabnis explains the module loading features in Silverlight 4 when using Prism.

Source: Dot Net Curry

Prism provides guidance, in the form of quick starts and a set of libraries consisting patterns, for developing composite applications using Silverlight, WPF and Windows Phone 7. These libraries help in designing and building WPF and Silverlight client applications which are modular, easy to build and flexible to maintain.

In the article, Mahesh Sabnis demonstrates how to use Prism in Silverlight by creating a sample application.

Source: Dot Net Curry

With an increasing popularity and availability of advanced features, Silverlight is being used by many developers to create rich browser applications as well as Line-Of-Business (LOB) applications. The focus is on creating rich, flexible, easy-to-maintain application keeping in mind the separation of concerns and loose coupling.

Prism is a guidance designed and developed by Microsoft which provides a set of libraries consisting of patterns for developing composite applications using Silverlight, WPF and Windows Phone 7. These libraries help in designing and building WPF and Silverlight client applications which are easy and flexible to maintain. The current version of Prism as of this writing is Prism 4.

Mahesh Sabnis discusses the WCF service security integration with ASP.NET Membership provider which is very useful while building Silverlight business applications.

Source: Dot Net Curry

WCF has provided many benefits for developing secure, scalable distributed applications. One of the nice features of WCF service security is its integration with ASP.NET Membership provider. Using this provider, a caller can be authenticated by the WCF service against the user credentials stored in the SQL Server ASPNETDB database. In this article, we will see how a Silverlight client caller can be authenticated against the WCF service using this membership provider.