Defines the interface a control implements to get or set its text content.
<AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ <AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _ Public Interface ITextControl
Dim instance As ITextControl
[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)] [AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)] public interface ITextControl
[AspNetHostingPermissionAttribute(SecurityAction::InheritanceDemand, Level = AspNetHostingPermissionLevel::Minimal)] [AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)] public interface class ITextControl
public interface ITextControl
The ITextControl interface defines the Text property a control implements to allow the getting or setting of its text content. The Text property can be set programmatically or through user input.
A control implementing this interface can be used to display user input. Before displaying user input, the input must be checked for malicious client script, such as executable script or SQL statements. ASP.NET provides an input request validation feature to block script and HTML in user input. Validation server controls are also provided to assess user input. For more information, see Validation Server Control Syntax.
The following code example shows a custom control that implements the [T:System.Web.UI.]ITextControl interface. A default value is assigned to the Text property if nullNothingnullptra null reference (Nothing in Visual Basic) is passed to the property.
Public Class CustomTextControl Inherits System.Web.UI.Control Implements System.Web.UI.ITextControl Private _text As String Public Property Text() As String Implements System.Web.UI.ITextControl.Text Get Return _text End Get Set(ByVal value As String) If (value <> Nothing) Then _text = value Else _text = "No Value." End If End Set End Property ' Provide the remaining code to implement a text control. End Class
public class CustomTextControl : Control, ITextControl { private string _text; public CustomTextControl() { } public string Text { get { return _text; } set { if (value != null) { _text = value; } else { _text = "No Value."; } } } // Provide the remaining code to implement a text control. }
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