ASP.NET.in.a.Nutshell.Second.Edition [Electronic resources] نسخه متنی

This abstract class is the basis for all validation controls. It
supplies a Validate( ) method, which does not
return a value, but updates the IsValid property.
When using validation controls on a Web Forms page, you should check
the System.Web.UI.Page.IsValid property. This
value will be True only if all validation controls
on the page have successfully validated their input. The
BaseValidator class also provides various other
methods that are not used directly when creating a Web Forms page.

The ControlToValidate property specifies the
control that a validator will verify. The
ErrorMessage property specifies the message that
will be displayed in the validation control if validation fails,
although this text can be overridden by changing the validation
control's Text property. The
ErrorMessage will also appear in a
page's ValidationSummary control,
if present.

By default, ASP.NET will not render any HTML for a control if it is
not visible. This means that space will not be allocated for a
validation control unless validation fails. The
Display property allows you to allocate space for
a validation control by specifying
ValidatorDisplay.Static, which may be required if
your validation control is in a table. You can also set this property
to ValidatorDisplay.None to specify that no
validation message will be displayed in the control, although one
will still be shown in the ValidationSummary
control, if used.

public abstract class 
BaseValidator  : Label, System.Web.UI.IValidator {
// Protected Constructors
   protected 
BaseValidator ( );
// Public Instance Properties
public string 
ControlToValidate {set; get; }
public ValidatorDisplay 
Display {set; get; }
public bool 
EnableClientScript {set; get; }
public override bool 
Enabled {set; get; }// overrides WebControl
public string 
ErrorMessage {set; get; }// implements System.Web.UI.IValidator
public override Color 
ForeColor {set; get; }// overrides WebControl
public bool 
IsValid {set; get; }// implements System.Web.UI.IValidator
// Protected Instance Properties
protected bool 
PropertiesValid {get; }
protected bool 
RenderUplevel {get; }
// Public Static Methods
public static PropertyDescriptor 
GetValidationProperty (object 
component );
// Public Instance Methods
public void 
Validate ( );// implements System.Web.UI.IValidator
// Protected Instance Methods
protected override void 
AddAttributesToRender (System.Web.UI.HtmlTextWriter 
writer );// overrides WebControl
protected void 
CheckControlValidationProperty (string 
name , string 
propertyName );
protected virtual bool 
ControlPropertiesValid ( );
protected virtual bool 
DetermineRenderUplevel ( );
protected abstract bool 
EvaluateIsValid ( );
protected string 
GetControlRenderID (string 
name );
protected string 
GetControlValidationValue (string 
name );
protected override void 
OnInit (EventArgs 
e );                 // overrides System.Web.UI.Control
protected override void 
OnPreRender (EventArgs 
e );            // overrides System.Web.UI.Control
protected override void 
OnUnload (EventArgs 
e );               // overrides System.Web.UI.Control
protected void 
RegisterValidatorCommonScript ( );
protected virtual void 
RegisterValidatorDeclaration ( );
protected override void 
Render (System.Web.UI.HtmlTextWriter 
writer );// overrides WebControl
}

Hierarchy

System.Object
System.Web.UI.Control(System.ComponentModel.IComponent,
System.IDisposable,
System.Web.UI.IParserAccessor,
System.Web.UI.IDataBindingsAccessor)

WebControl(System.Web.UI.IAttributeAccessor)
Label
BaseValidator(System.Web.UI.IValidator)

Subclasses

BaseCompareValidator,
CustomValidator,
RegularExpressionValidator,
RequiredFieldValidator

Returned By

System.Web.UI.MobileControls.BaseValidator.CreateWebValidator(
)