DynamicValidator Class

Definition

Namespace:

System.Web.DynamicData

Assembly:

System.Web.DynamicData.dll

Enforces and catches exceptions that are thrown in a data model and displays the error.

public ref class DynamicValidator : System::Web::UI::WebControls::BaseValidator

[System.Drawing.ToolboxBitmap(typeof(System.Web.DynamicData.DynamicValidator), "DynamicValidator.bmp")]
public class DynamicValidator : System.Web.UI.WebControls.BaseValidator

[<System.Drawing.ToolboxBitmap(typeof(System.Web.DynamicData.DynamicValidator), "DynamicValidator.bmp")>]
type DynamicValidator = class
    inherit BaseValidator

Public Class DynamicValidator
Inherits BaseValidator

Inheritance

Object

Control

WebControl

Label

BaseValidator

DynamicValidator

Attributes

ToolboxBitmapAttribute

Examples

The following example shows how to create a DynamicValidator control class that displays other exceptions in all pages.

''' <summary>   
''' Display other exceptions in all pages.   
''' </summary>   
Public Class MyDynamicValidator   
    Inherits DynamicValidator   

    Protected Overloads Overrides Sub ValidateException(ByVal exception As Exception)   
        ' If it's not an exception that DynamicValidator displays find   
        ' the innermost exception.   
        If Not (TypeOf exception Is IDynamicValidatorException) AndAlso _  
                Not (TypeOf exception Is ValidationException) Then   
            While exception.InnerException IsNot Nothing   
                exception = exception.InnerException   
            End While   

            ' Wrap it in a ValidationException so that the base code   
            ' does not ignore it.   
            If ExceptionShouldBeDisplayedInPage(exception) Then   
                exception = New ValidationException(Nothing, exception)   
            End If   
        End If   

        ' Call the base class for the exception that is modified.  
        MyBase.ValidateException(exception)   
    End Sub   

    Private Function ExceptionShouldBeDisplayedInPage(ByVal e As Exception) _  
            As Boolean   
        ' Add code to find the exception and   
        ' decide whether it should be shown in the page.  

        Return True   
    End Function   
End Class  

/// <summary>  
/// Display other exceptions in all pages.   
/// </summary>  
public class MyDynamicValidator : DynamicValidator {  

    protected override void ValidateException(Exception exception) {  
        // If it's not an exception that DynamicValidator displays find   
        // the innermost exception.  
        if (!(exception is IDynamicValidatorException) && !(exception   
              is ValidationException)) {  
            while (exception.InnerException != null) {  
                exception = exception.InnerException;  
            }  

            // Wrap it in a ValidationException so that the base code   
            // does not ignore it.  
            if (ExceptionShouldBeDisplayedInPage(exception)) {  
                exception = new ValidationException(null, exception);  
            }  
        }  

        // Call the base class on the exception that is modified.  
        base.ValidateException(exception);  
    }  

    private bool ExceptionShouldBeDisplayedInPage(Exception e) {  
        // Add your code to find the exception and  
        // decides whether it should be shown in the page.  

           return true;  
    }  
}  

The following example shows how to use tag remapping in the web.config file to display the exception in all the Web pages.

<pages>  
  <tagMapping>  
    <add tagType="System.Web.DynamicData.DynamicValidator"   
        mappedTagType="MyDynamicValidator"/>  
  </tagMapping>  
</pages>  

Remarks

The DynamicValidator control can be used with data fields or data entities. It catches exceptions that are thrown in LINQ-to-SQL classes or entity in extensibility methods in the data model. The DynamicValidator control is associated with the controls that accept user input. For example, a DynamicValidator control that is associated with a text box that accepts user input for a UnitsInStock field in a Products table catches and displays the exception that is thrown if the input is greater or less than the allowable units in the data model.

By default, ASP.NET Dynamic Data does not display all exceptions from the data model in the page, because some database exceptions might contain confidential information. Dynamic Data displays ValidationException values only. If you want your application to display other exceptions, you can create a DynamicValidator control, provide the exceptions that you want to display, and attach the exceptions to the DynamicValidator control. The exceptions that are thrown in the data model will be displayed in all pages in the application.

Constructors

DynamicValidator()

Initializes a new instance of the DynamicValidator class.

Properties

AccessKey	Gets or sets the access key that allows you to quickly navigate to the Web server control. (Inherited from WebControl)
Adapter	Gets the browser-specific adapter for the control. (Inherited from Control)
AppRelativeTemplateSourceDirectory	Gets or sets the application-relative virtual directory of the Page or UserControl object that contains this control. (Inherited from Control)
AssociatedControlID	This property is not supported. (Inherited from BaseValidator)
Attributes	Gets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control. (Inherited from WebControl)
BackColor	Gets or sets the background color of the Web server control. (Inherited from WebControl)
BindingContainer	Gets the control that contains this control's data binding. (Inherited from Control)
BorderColor	Gets or sets the border color of the Web control. (Inherited from WebControl)
BorderStyle	Gets or sets the border style of the Web server control. (Inherited from WebControl)
BorderWidth	Gets or sets the border width of the Web server control. (Inherited from WebControl)
ChildControlsCreated	Gets a value that indicates whether the server control's child controls have been created. (Inherited from Control)
ClientID	Gets the control ID for HTML markup that is generated by ASP.NET. (Inherited from Control)
ClientIDMode	Gets or sets the algorithm that is used to generate the value of the ClientID property. (Inherited from Control)
ClientIDSeparator	Gets a character value representing the separator character used in the ClientID property. (Inherited from Control)
Column	Gets or sets the column to validate.
ColumnName	Gets the name of the column to validate.
Context	Gets the HttpContext object associated with the server control for the current Web request. (Inherited from Control)
Controls	Gets a ControlCollection object that represents the child controls for a specified server control in the UI hierarchy. (Inherited from Control)
ControlStyle	Gets the style of the Web server control. This property is used primarily by control developers. (Inherited from WebControl)
ControlStyleCreated	Gets a value indicating whether a Style object has been created for the ControlStyle property. This property is primarily used by control developers. (Inherited from WebControl)
ControlToValidate	Gets or sets the input control to validate. (Inherited from BaseValidator)
CssClass	Gets or sets the Cascading Style Sheet (CSS) class rendered by the Web server control on the client. (Inherited from WebControl)
DataItemContainer	Gets a reference to the naming container if the naming container implements IDataItemContainer. (Inherited from Control)
DataKeysContainer	Gets a reference to the naming container if the naming container implements IDataKeysControl. (Inherited from Control)
DesignMode	Gets a value indicating whether a control is being used on a design surface. (Inherited from Control)
Display	Gets or sets the display behavior of the error message in a validation control. (Inherited from BaseValidator)
EnableClientScript	Gets or sets a value indicating whether client-side validation is enabled. (Inherited from BaseValidator)
Enabled	Gets or sets a value that indicates whether the validation control is enabled. (Inherited from BaseValidator)
EnableTheming	Gets or sets a value indicating whether themes apply to this control. (Inherited from WebControl)
EnableViewState	Gets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client. (Inherited from Control)
ErrorMessage	Gets or sets the text for the error message displayed in a ValidationSummary control when validation fails. (Inherited from BaseValidator)
Events	Gets a list of event handler delegates for the control. This property is read-only. (Inherited from Control)
Font	Gets the font properties associated with the Web server control. (Inherited from WebControl)
ForeColor	Gets or sets the color of the message displayed when validation fails. (Inherited from BaseValidator)
HasAttributes	Gets a value indicating whether the control has attributes set. (Inherited from WebControl)
HasChildViewState	Gets a value indicating whether the current server control's child controls have any saved view-state settings. (Inherited from Control)
Height	Gets or sets the height of the Web server control. (Inherited from WebControl)
ID	Gets or sets the programmatic identifier assigned to the server control. (Inherited from Control)
IdSeparator	Gets the character used to separate control identifiers. (Inherited from Control)
IsChildControlStateCleared	Gets a value indicating whether controls contained within this control have control state. (Inherited from Control)
IsEnabled	Gets a value indicating whether the control is enabled. (Inherited from WebControl)
IsTrackingViewState	Gets a value that indicates whether the server control is saving changes to its view state. (Inherited from Control)
IsUnobtrusive	Gets a value that indicates whether the control generates unobtrusive JavaScript. (Inherited from BaseValidator)
IsValid	Gets or sets a value that indicates whether the associated input control passes validation. (Inherited from BaseValidator)
IsViewStateEnabled	Gets a value indicating whether view state is enabled for this control. (Inherited from Control)
LoadViewStateByID	Gets a value indicating whether the control participates in loading its view state by ID instead of index. (Inherited from Control)
NamingContainer	Gets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same ID property value. (Inherited from Control)
Page	Gets a reference to the Page instance that contains the server control. (Inherited from Control)
Parent	Gets a reference to the server control's parent control in the page control hierarchy. (Inherited from Control)
PropertiesValid	Gets a value that indicates whether the control specified by the ControlToValidate property is a valid control. (Inherited from BaseValidator)
RenderingCompatibility	Gets a value that specifies the ASP.NET version that rendered HTML will be compatible with. (Inherited from Control)
RenderUplevel	Gets a value that indicates whether the client's browser supports "uplevel" rendering. (Inherited from BaseValidator)
SetFocusOnError	Gets or sets a value that indicates whether focus is set to the control specified by the ControlToValidate property when validation fails. (Inherited from BaseValidator)
Site	Gets information about the container that hosts the current control when rendered on a design surface. (Inherited from Control)
SkinID	Gets or sets the skin to apply to the control. (Inherited from WebControl)
Style	Gets a collection of text attributes that will be rendered as a style attribute on the outer tag of the Web server control. (Inherited from WebControl)
SupportsDisabledAttribute	Gets a value that indicates whether the control should set the disabled attribute of the rendered HTML element to "disabled" when the control's IsEnabled property is false. (Inherited from Label)
TabIndex	Gets or sets the tab index of the Web server control. (Inherited from WebControl)
TagKey	Gets the HTML tag that is used to render the Label control. (Inherited from Label)
TagName	Gets the name of the control tag. This property is used primarily by control developers. (Inherited from WebControl)
TemplateControl	Gets or sets a reference to the template that contains this control. (Inherited from Control)
TemplateSourceDirectory	Gets the virtual directory of the Page or UserControl that contains the current server control. (Inherited from Control)
Text	Gets or sets the text displayed in the validation control when validation fails. (Inherited from BaseValidator)
ToolTip	Gets or sets the text displayed when the mouse pointer hovers over the Web server control. (Inherited from WebControl)
UniqueID	Gets the unique, hierarchically qualified identifier for the server control. (Inherited from Control)
ValidateRequestMode	Gets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values. (Inherited from Control)
ValidationException	Gets or sets validation exception that occurs during validation.
ValidationGroup	Gets or sets the name of the validation group to which this validation control belongs. (Inherited from BaseValidator)
ViewState	Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page. (Inherited from Control)
ViewStateIgnoresCase	Gets a value that indicates whether the StateBag object is case-insensitive. (Inherited from Control)
ViewStateMode	Gets or sets the view-state mode of this control. (Inherited from Control)
Visible	Gets or sets a value that indicates whether a server control is rendered as UI on the page. (Inherited from Control)
Width	Gets or sets the width of the Web server control. (Inherited from WebControl)

Methods

AddAttributesToRender(HtmlTextWriter)	Adds the HTML attributes and styles that need to be rendered for the control to the specified HtmlTextWriter object. (Inherited from BaseValidator)
AddedControl(Control, Int32)	Called after a child control is added to the Controls collection of the Control object. (Inherited from Control)
AddParsedSubObject(Object)	Notifies the control that an element was parsed and adds the element to the Label control. (Inherited from Label)
ApplyStyle(Style)	Copies any nonblank elements of the specified style to the Web control, overwriting any existing style elements of the control. This method is primarily used by control developers. (Inherited from WebControl)
ApplyStyleSheetSkin(Page)	Applies the style properties defined in the page style sheet to the control. (Inherited from Control)
BeginRenderTracing(TextWriter, Object)	Begins design-time tracing of rendering data. (Inherited from Control)
BuildProfileTree(String, Boolean)	Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page. (Inherited from Control)
CheckControlValidationProperty(String, String)	Verifies whether the specified control is on the page and contains validation properties. (Inherited from BaseValidator)
ClearCachedClientID()	Sets the cached ClientID value to null. (Inherited from Control)
ClearChildControlState()	Deletes the control-state information for the server control's child controls. (Inherited from Control)
ClearChildState()	Deletes the view-state and control-state information for all the server control's child controls. (Inherited from Control)
ClearChildViewState()	Deletes the view-state information for all the server control's child controls. (Inherited from Control)
ClearEffectiveClientIDMode()	Sets the ClientIDMode property of the current control instance and of any child controls to Inherit. (Inherited from Control)
ControlPropertiesValid()	Indicates whether the properties of the specified DynamicValidator control are valid.
CopyBaseAttributes(WebControl)	Copies the properties not encapsulated by the Style object from the specified Web server control to the Web server control that this method is called from. This method is used primarily by control developers. (Inherited from WebControl)
CreateChildControls()	Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering. (Inherited from Control)
CreateControlCollection()	Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control. (Inherited from Control)
CreateControlStyle()	Creates the style object that is used internally by the WebControl class to implement all style related properties. This method is used primarily by control developers. (Inherited from WebControl)
DataBind()	Binds a data source to the invoked server control and all its child controls. (Inherited from Control)
DataBind(Boolean)	Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event. (Inherited from Control)
DataBindChildren()	Binds a data source to the server control's child controls. (Inherited from Control)
DetermineRenderUplevel()	Determines whether the validation control can perform client-side validation. (Inherited from BaseValidator)
Dispose()	Enables a server control to perform final clean up before it is released from memory. (Inherited from Control)
EndRenderTracing(TextWriter, Object)	Ends design-time tracing of rendering data. (Inherited from Control)
EnsureChildControls()	Determines whether the server control contains child controls. If it does not, it creates child controls. (Inherited from Control)
EnsureID()	Creates an identifier for controls that do not have an identifier assigned. (Inherited from Control)
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
EvaluateIsValid()	Determines whether the value in the input control to validate is valid.
FindControl(String, Int32)	Searches the current naming container for a server control with the specified id and an integer, specified in the pathOffset parameter, which aids in the search. You should not override this version of the FindControl method. (Inherited from Control)
FindControl(String)	Searches the current naming container for a server control with the specified id parameter. (Inherited from Control)
Focus()	Sets input focus to a control. (Inherited from Control)
GetControlRenderID(String)	Gets the client ID of the specified control. (Inherited from BaseValidator)
GetControlValidationValue(String)	Gets the value associated with the specified input control. (Inherited from BaseValidator)
GetDesignModeState()	Gets design-time data for a control. (Inherited from Control)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetRouteUrl(Object)	Gets the URL that corresponds to a set of route parameters. (Inherited from Control)
GetRouteUrl(RouteValueDictionary)	Gets the URL that corresponds to a set of route parameters. (Inherited from Control)
GetRouteUrl(String, Object)	Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control)
GetRouteUrl(String, RouteValueDictionary)	Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control)
GetType()	Gets the Type of the current instance. (Inherited from Object)
GetUniqueIDRelativeTo(Control)	Returns the prefixed portion of the UniqueID property of the specified control. (Inherited from Control)
HasControls()	Determines if the server control contains any child controls. (Inherited from Control)
HasEvents()	Returns a value indicating whether events are registered for the control or any child controls. (Inherited from Control)
IsLiteralContent()	Determines if the server control holds only literal content. (Inherited from Control)
LoadControlState(Object)	Restores control-state information from a previous page request that was saved by the SaveControlState() method. (Inherited from Control)
LoadViewState(Object)	Loads the previously saved state for the control. (Inherited from Label)
MapPathSecure(String)	Retrieves the physical path that a virtual path, either absolute or relative, maps to. (Inherited from Control)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
MergeStyle(Style)	Copies any nonblank elements of the specified style to the Web control, but will not overwrite any existing style elements of the control. This method is used primarily by control developers. (Inherited from WebControl)
OnBubbleEvent(Object, EventArgs)	Determines whether the event for the server control is passed up the page's UI server control hierarchy. (Inherited from Control)
OnDataBinding(EventArgs)	Raises the DataBinding event. (Inherited from Control)
OnInit(EventArgs)	Raises the Init event to initialize the DynamicValidator control.
OnLoad(EventArgs)	Raises the Load event. (Inherited from Control)
OnPreRender(EventArgs)	Raises the PreRender event. (Inherited from BaseValidator)
OnUnload(EventArgs)	Raises the Unload event. (Inherited from BaseValidator)
OpenFile(String)	Gets a Stream used to read a file. (Inherited from Control)
RaiseBubbleEvent(Object, EventArgs)	Assigns any sources of the event and its information to the control's parent. (Inherited from Control)
RegisterValidatorCommonScript()	Registers code on the page for client-side validation. (Inherited from BaseValidator)
RegisterValidatorDeclaration()	Registers an ECMAScript array declaration using the array name Page_Validators. (Inherited from BaseValidator)
RemovedControl(Control)	Called after a child control is removed from the Controls collection of the Control object. (Inherited from Control)
Render(HtmlTextWriter)	Displays the control on the client. (Inherited from BaseValidator)
RenderBeginTag(HtmlTextWriter)	Renders the HTML opening tag of the control to the specified writer. This method is used primarily by control developers. (Inherited from WebControl)
RenderChildren(HtmlTextWriter)	Outputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client. (Inherited from Control)
RenderContents(HtmlTextWriter)	Renders the contents of the Label into the specified writer. (Inherited from Label)
RenderControl(HtmlTextWriter, ControlAdapter)	Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object. (Inherited from Control)
RenderControl(HtmlTextWriter)	Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled. (Inherited from Control)
RenderEndTag(HtmlTextWriter)	Renders the HTML closing tag of the control into the specified writer. This method is used primarily by control developers. (Inherited from WebControl)
ResolveAdapter()	Gets the control adapter responsible for rendering the specified control. (Inherited from Control)
ResolveClientUrl(String)	Gets a URL that can be used by the browser. (Inherited from Control)
ResolveUrl(String)	Converts a URL into one that is usable on the requesting client. (Inherited from Control)
SaveControlState()	Saves any server control state changes that have occurred since the time the page was posted back to the server. (Inherited from Control)
SaveViewState()	Saves any state that was modified after the TrackViewState() method was invoked. (Inherited from WebControl)
SetDesignModeState(IDictionary)	Sets design-time data for a control. (Inherited from Control)
SetRenderMethodDelegate(RenderMethod)	Assigns an event handler delegate to render the server control and its content into its parent control. (Inherited from Control)
SetTraceData(Object, Object, Object)	Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value. (Inherited from Control)
SetTraceData(Object, Object)	Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value. (Inherited from Control)
ToString()	Returns a string that represents the current object. (Inherited from Object)
TrackViewState()	Causes the control to track changes to its view state so they can be stored in the object's ViewState property. (Inherited from WebControl)
Validate()	Performs validation on the associated input control and updates the IsValid property. (Inherited from BaseValidator)
ValidateException(Exception)	Sets up a validation exception if an exception occurs in the data model.

Events

DataBinding	Occurs when the server control binds to a data source. (Inherited from Control)
Disposed	Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested. (Inherited from Control)
Init	Occurs when the server control is initialized, which is the first step in its lifecycle. (Inherited from Control)
Load	Occurs when the server control is loaded into the Page object. (Inherited from Control)
PreRender	Occurs after the Control object is loaded but prior to rendering. (Inherited from Control)
Unload	Occurs when the server control is unloaded from memory. (Inherited from Control)

Explicit Interface Implementations

IAttributeAccessor.GetAttribute(String)	Gets an attribute of the Web control with the specified name. (Inherited from WebControl)
IAttributeAccessor.SetAttribute(String, String)	Sets an attribute of the Web control to the specified name and value. (Inherited from WebControl)
IControlBuilderAccessor.ControlBuilder	For a description of this member, see ControlBuilder. (Inherited from Control)
IControlDesignerAccessor.GetDesignModeState()	For a description of this member, see GetDesignModeState(). (Inherited from Control)
IControlDesignerAccessor.SetDesignModeState(IDictionary)	For a description of this member, see SetDesignModeState(IDictionary). (Inherited from Control)
IControlDesignerAccessor.SetOwnerControl(Control)	For a description of this member, see SetOwnerControl(Control). (Inherited from Control)
IControlDesignerAccessor.UserData	For a description of this member, see UserData. (Inherited from Control)
IDataBindingsAccessor.DataBindings	For a description of this member, see DataBindings. (Inherited from Control)
IDataBindingsAccessor.HasDataBindings	For a description of this member, see HasDataBindings. (Inherited from Control)
IExpressionsAccessor.Expressions	For a description of this member, see Expressions. (Inherited from Control)
IExpressionsAccessor.HasExpressions	For a description of this member, see HasExpressions. (Inherited from Control)
IParserAccessor.AddParsedSubObject(Object)	For a description of this member, see AddParsedSubObject(Object). (Inherited from Control)

Extension Methods

FindDataSourceControl(Control)	Returns the data source that is associated with the data control for the specified control.
FindFieldTemplate(Control, String)	Returns the field template for the specified column in the specified control's naming container.
FindMetaTable(Control)	Returns the metatable object for the containing data control.