This class represents the HTML <select> tag, which allows the user to choose an option from a drop-down list box. To add an item to the list, use the Add( ) method of the Items property. The HtmlSelect control also supports data binding to its Items property.
To retrieve the currently selected item, you can use SelectedIndex property to find the ordinal number of the chosen item (-1 if no selection has been made), or the Value property to retrieve the text of the selected item. If you have set Multiple to True, more than one item may be selected and only the first item will be returned by the SelectedIndex and Value properties. Instead, you will have to iterate through the Items collection and check the System.Web.UI.WebControls.ListItem.Selected property for each one.
You can also react to the ServerChange event, which will fire only after a postback is triggered (for example, when the user clicks a submit button).
public class HtmlSelect : HtmlContainerControl, System.Web.UI.IPostBackDataHandler { // Public Constructors public HtmlSelect( ); // Public Instance Properties public virtual string DataMember{set; get; } public virtual object DataSource{set; get; } public virtual string DataTextField{set; get; } public virtual string DataValueField{set; get; } public override string InnerHtml{set; get; } // overrides HtmlContainerControl public override string InnerText{set; get; } // overrides HtmlContainerControl public ListItemCollection Items{get; } public bool Multiple{set; get; } public string Name{set; get; } public virtual int SelectedIndex{set; get; } public int Size{set; get; } public string Value{set; get; } // Protected Instance Properties protected virtual int[ ] SelectedIndices{get; } // Protected Instance Methods protected override void AddParsedSubObject(object obj); // overrides System.Web.UI.Control protected virtual void ClearSelection( ); protected override ControlCollection CreateControlCollection( ); // overrides HtmlContainerControl protected override void LoadViewState(object savedState); // overrides HtmlContainerControl protected override void OnDataBinding(EventArgs e); // overrides System.Web.UI.Control protected override void OnPreRender(EventArgs e); // overrides System.Web.UI.Control protected virtual void OnServerChange(EventArgs e); protected override void RenderAttributes(System.Web.UI.HtmlTextWriter writer); // overrides HtmlContainerControl protected override void RenderChildren(System.Web.UI.HtmlTextWriter writer); // overrides System.Web.UI.Control protected override object SaveViewState( ); // overrides System.Web.UI.Control protected virtual void Select(int[ ] selectedIndices); protected override void TrackViewState( ); // overrides System.Web.UI.Control// Events public event EventHandler ServerChange; }
System.Web.UI.Control(System.ComponentModel.IComponent, System.IDisposable, System.Web.UI.IParserAccessor, System.Web.UI.IDataBindingsAccessor) 