Class CaptchaControl

The CaptchaControl control provides a Captcha Challenge control.

Inheritance
System.Object
CaptchaControl
Implements
INamingContainer
IPostBackDataHandler
Namespace: DotNetNuke.UI.WebControls
Assembly: DotNetNuke.dll
Syntax
public class CaptchaControl : WebControl

Constructors

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CaptchaControl()

Initializes a new instance of the CaptchaControl class.

Declaration
public CaptchaControl()

Properties

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BackGroundColor

Gets or sets the BackGroundColor.

Declaration
public Color BackGroundColor { get; set; }
Property Value
Type Description
Color
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BackGroundImage

Gets or sets the BackGround Image.

Declaration
public string BackGroundImage { get; set; }
Property Value
Type Description
System.String
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CaptchaChars

Gets or sets the list of characters.

Declaration
public string CaptchaChars { get; set; }
Property Value
Type Description
System.String
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CaptchaHeight

Gets or sets the height of the Captcha image.

Declaration
public Unit CaptchaHeight { get; set; }
Property Value
Type Description
Unit
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CaptchaLength

Gets or sets the length of the Captcha string.

Declaration
public int CaptchaLength { get; set; }
Property Value
Type Description
System.Int32
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CaptchaWidth

Gets or sets the width of the Captcha image.

Declaration
public Unit CaptchaWidth { get; set; }
Property Value
Type Description
Unit
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EnableViewState

Gets or sets a value indicating whether the Viewstate is enabled.

Declaration
public override bool EnableViewState { get; set; }
Property Value
Type Description
System.Boolean
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ErrorMessage

Gets or sets the ErrorMessage to display if the control is invalid.

Declaration
public string ErrorMessage { get; set; }
Property Value
Type Description
System.String
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ErrorStyle

Gets and sets the BackGroundColor.

Declaration
public Style ErrorStyle { get; }
Property Value
Type Description
Style
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Expiration

Gets or sets the Expiration time in seconds.

Declaration
public int Expiration { get; set; }
Property Value
Type Description
System.Int32
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IsValid

Gets a value indicating whether the control is valid.

Declaration
public bool IsValid { get; }
Property Value
Type Description
System.Boolean
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RenderUrl

Gets or sets the Url to use to render the control.

Declaration
public string RenderUrl { get; set; }
Property Value
Type Description
System.String
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Text

Gets or sets the Help Text to use.

Declaration
public string Text { get; set; }
Property Value
Type Description
System.String
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TextBoxStyle

Gets the Style to use for the Text Box.

Declaration
public Style TextBoxStyle { get; }
Property Value
Type Description
Style

Methods

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CreateChildControls()

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected override void CreateChildControls()
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GetNextCaptcha()

Gets the next Captcha.

Declaration
protected virtual string GetNextCaptcha()
Returns
Type Description
System.String

The challenge string.
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LoadPostData(String, NameValueCollection)

LoadPostData loads the Post Back Data and determines whether the value has change.

Declaration
public virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection)
Parameters
Type Name Description
System.String postDataKey

A key to the PostBack Data to load.
NameValueCollection postCollection

A name value collection of postback data.
Returns
Type Description
System.Boolean

Always false.
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LoadViewState(Object)

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected override void LoadViewState(object savedState)
Parameters
Type Name Description
System.Object savedState
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OnPreRender(EventArgs)

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected override void OnPreRender(EventArgs e)
Parameters
Type Name Description
EventArgs e
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OnUserValidated(ServerValidateEventArgs)

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected virtual void OnUserValidated(ServerValidateEventArgs e)
Parameters
Type Name Description
ServerValidateEventArgs e
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RaisePostDataChangedEvent()

RaisePostDataChangedEvent runs when the PostBackData has changed.

Declaration
public void RaisePostDataChangedEvent()
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Render(HtmlTextWriter)

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected override void Render(HtmlTextWriter writer)
Parameters
Type Name Description
HtmlTextWriter writer
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SaveViewState()

The CaptchaControl control provides a Captcha Challenge control.

Declaration
protected override object SaveViewState()
Returns
Type Description
System.Object
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Validate(String)

Validates the posted back data.

Declaration
public bool Validate(string userData)
Parameters
Type Name Description
System.String userData

The user entered data.
Returns
Type Description
System.Boolean

true if the data is valid, otherwise false.

Events

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UserValidated

The CaptchaControl control provides a Captcha Challenge control.

Declaration
public event ServerValidateEventHandler UserValidated
Event Type
Type Description
ServerValidateEventHandler

Implements

INamingContainer
IPostBackDataHandler

Extension Methods