HtmlSelect::DataSource Property
Gets or sets the source of information to bind to the HtmlSelect control.
Assembly: System.Web (in System.Web.dll)
public: virtual property Object^ DataSource { Object^ get (); void set (Object^ value); }
<asp:HtmlSelect DataSource="Object" />
Property Value
Type: System::ObjectAn IEnumerable or IListSource that contains a collection of values used to supply data to this control. The default value is nullptr.
| Exception | Condition |
|---|---|
| ArgumentException | The specified data source is not compatible with either System.Collections::IEnumerable or System.ComponentModel::IListSource, and it is not nullptr. |
| HttpException | The data source cannot be resolved because a value is specified for both the DataSource property and the DataSourceID property. |
Use the DataSource property to specify the data source to bind to the HtmlSelect control. A data source must be an object that implements either the System.Collections::IEnumerable interface (such as System.Data::DataView, System.Collections::ArrayList, or System.Collections::Hashtable) or the IListSource interface. When you set the DataSource property, you must manually write the code to perform data binding.
If the data source contains multiple sets of data, such as a System.Data::DataSet object with multiple tables, use the DataMember property to specify which data set to bind to the control.
You can specify which fields from the data source to bind to the ListItem::Text and ListItem::Value properties of each item in the control by setting the DataTextField and DataValueField properties, respectively.
Alternately, you can use the DataSourceID property to automatically bind to a data source represented by a data source control. When you set the DataSourceID property, the data listing control automatically binds to the specified data source control. You do not need to write code that explicitly calls the DataBind method.
If values are specified for both the DataSource property and the DataSourceID property, ASP.NET is not able to resolve the data source and a System.Web::HttpException exception is thrown.
The following code example demonstrates how to use the DataSource property to specify the source of information to bind to the HtmlSelect control.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.