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DataSourceView.ExecuteSelect Method

Gets a list of data from the underlying data storage.

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

abstract ExecuteSelect : 
        arguments:DataSourceSelectArguments -> IEnumerable 


Type: System.Web.UI.DataSourceSelectArguments
A DataSourceSelectArguments that is used to request operations on the data beyond basic data retrieval.

Return Value

Type: System.Collections.IEnumerable
An IEnumerable list of data from the underlying data storage.

The ExecuteSelect method is called to retrieve data from the underlying data store and return it as an IEnumerable object. All data source controls support data retrieval from their underlying data storage, even if other operations such as insertion and sorting are not supported. Because a data-bound control can request a list of data at any time as a result of a DataSourceChanged event or a DataBind method call, the data retrieval must be performed on demand.

The following code example demonstrates how to override the ExecuteSelect method in a class that extends the DataSourceView class. The CsvDataSourceView opens a comma-separated value (.csv) file, parses it line by line, and creates a DataTable object and a DataView object to hold the data in memory. Finally, a sort expression is applied if one is supplied by the DataSourceSelectArguments object, and the DataView object is returned as an IEnumerable instance. This code example is part of a larger example provided for the DataSourceView class.


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0



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