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

This abstract class is the basis for all mobile validation controls,
and it plays the same role as the
System.Web.UI.WebControls.BaseValidator class in a
full-blown ASP.NET web form, with some minor limitations and the
ability for device-specific support. The
BaseValidator class includes a Validate(
) method, which does not return a value, but updates the
IsValid property. When using validation controls
on a mobile page, you should check the
MobilePage.IsValid property. This value will only
be True if all validation controls on the page
have successfully validated their input.

The ControlToValidate property specifies the
control that a validator will verify. The ASP.NET mobile controls
that support validation include the TextBox (in
which case the TextBox.Text property is validated)
and the SelectionList control (in which case the
SelectionList.SelectedIndex property is
validated). You can create custom controls that can participate in
validation using the
System.Web.UI.ValidationPropertyAttribute
attribute.

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 on the page. By default, ASP.NET will not render any
output 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
System.Web.UI.WebControls.ValidatorDisplay.Static,
which may be required if your validation control is in a table. You
can also set this property to
System.Web.UI.WebControls.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  : TextControl, System.Web.UI.IValidator {
// Protected Constructorsprotected 
BaseValidator ( );
// Public Instance Properties
public string 
ControlToValidate {set; get; }
public ValidatorDisplay 
Display {set; get; }
public string 
ErrorMessage {set; get; } // implements System.Web.UI.IValidator
public bool 
IsValid {set; get; } // implements System.Web.UI.IValidator
public override string 
StyleReference {set; get; } // overrides MobileControl
public override int 
VisibleWeight {get; } // overrides MobileControl
// Public Instance Methods
public void 
Validate ( );   // implements System.Web.UI.IValidator
// Protected Instance Methods
protected void 
CheckControlValidationProperty (string 
name , string 
propertyName );
protected virtual bool 
ControlPropertiesValid ( );
protected virtual BaseValidator 
CreateWebValidator ( );
protected abstract bool 
EvaluateIsValid ( );
protected override void 
OnInit (EventArgs 
e );                 // overrides MobileControl
protected override void 
OnPreRender (EventArgs 
e );            // overrides MobileControl
}

Hierarchy

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

MobileControl(System.Web.UI.IAttributeAccessor)
TextControl
BaseValidator(System.Web.UI.IValidator)

Subclasses

CompareValidator,
CustomValidator,
RangeValidator,
RegularExpressionValidator,
RequiredFieldValidator

Returned By

System.Web.UI.MobileControls.Adapters.HtmlValidatorAdapter.Control,
System.Web.UI.MobileControls.Adapters.WmlValidatorAdapter.Control