Lanap.BotDetect.CodeTypeEnum Reference

Lanap.BotDetect.CodeTypeEnum contains all valid values of the Lanap.BotDetect.Captcha control's CodeType property. It represents the type of code rendered in CAPTCHA images and spoken in the audio CAPTCHAs.

• CodeTypeEnum Members
• CodeTypeEnum Default
• CodeTypeEnum Usage
• CodeTypeEnum Notes
• CodeTypeEnum Screenshots

Members

[VB.NET]

Public Enum CodeTypeEnum
  Alpha = 0
  Numeric
  AlphaNumeric
End Enum

[C#]

public enum CodeTypeEnum
{
  Alpha = 0,
  Numeric,
  AlphaNumeric
}

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Default value

If the CodeType property is not set, CodeTypeEnum.AlphaNumeric is used by default.

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Usage

[VB.NET]

' Example 1: simple assignment
SampleCaptcha.CodeType = CodeTypeEnum.Alpha

' Example 2: basic randomization
Dim max As Integer = _ 
  System.Enum.GetValues(GetType(CodeTypeEnum)).Length
SampleCaptcha.CodeType = CType(rand.Next(max), CodeTypeEnum)

' the above assumes a global RNG is initialized as follows:  
Public Shared ReadOnly rand As Random = New Random()

' Example 3: basic randomization using RandomizationHelper.vb
SampleCaptcha.CodeType = RandomizationHelper.GetRandomCodeType()

' Example 4: advanced randomization using RandomizationHelper.vb
Dim types As CodeTypeEnum()  = { _
  CodeTypeEnum.Alpha, _
  CodeTypeEnum.Numeric _
}

SampleCaptcha.CodeType = _
  RandomizationHelper.GetRandomCodeType(types)

[C#]

// Example 1: simple assignment
SampleCaptcha.CodeType = CodeTypeEnum.Alpha;

// Example 2: basic randomization
int max = Enum.GetValues(typeof(CodeTypeEnum)).Length;
SampleCaptcha.CodeType = (CodeTypeEnum)(rand.Next(max));

// the above assumes a global RNG is initialized as follows:  
public static readonly Random rand = new Random();

// Example 3: basic randomization using RandomizationHelper.cs
SampleCaptcha.CodeType = RandomizationHelper.GetRandomCodeType();

// Example 4: advanced randomization using RandomizationHelper.cs
CodeTypeEnum[] types = { 
  CodeTypeEnum.Alpha, 
  CodeTypeEnum.Numeric
};

SampleCaptcha.CodeType = 
  RandomizationHelper.GetRandomCodeType(types)

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Notes

To improve user-friendliness, the CodeTypeEnum.AlphaNumeric code generation algorithm doesn't use the full range of available characters, but excludes some easily confused character pairs - for example, '1', 'I', '7', 'L', '0', 'O', '5' and 'S' are not used.

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Screenshots

(Using the "Strippy" Text Style)

Alpha

Numeric

AlphaNumeric

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