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DevExpress Data Sources

In addition to a regular data binding mode, DevExpress Data Grid supports two more operation modes suitable for different business scenarios. For each operation mode, DevExpress Data Grid provides special data sources, which implement the required functionality.

Expanded Server Mode

The Server Mode has been specifically designed to work with large volumes of data. Bound data is not loaded into the memory in its entirety. Instead, the grid control loads data in small portions on demand. When the grid starts, it loads and displays the first portion of data from the data store. Then, as an end-user scrolls the grid, the grid requests the data store to return a subsequent section of data when the last record of the loaded subset is reached.

DevExpress Datasource
WCF Data Services WcfServerModeDataSource
Entity Framework 4 EntityServerModeDataSource
LINQ to Objects LinqServerModeDataSource
Parallel LINQ (PLINQ) PLinqServerModeDataSource

Expanded Instant Feedback™ UI Mode

In an Instant Feedback UI Mode (asynchronous data loading mode), the grid control and the host application will always remain responsive to end-user actions regardless of data operations initiated against the grid; be it record scrolling, sorting, grouping and/or data filtering (since data loading is performed asynchronously in a background thread). This is a read-only mode.

DevExpress Datasource
WCF Data Services WcfInstantFeedbackDataSource
Entity Framework 4 EntityInstantFeedbackDataSource
LINQ to Objects LinqInstantFeedbackDataSource
Parallel LINQ (PLINQ) (read-only) PLinqInstantFeedbackDataSource

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