Lanap.BotDetect.CodeTypeEnum Reference

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Lanap.BotDetect.CodeTypeEnum is a member of the BotDetect ASP.NET CAPTCHA interface that 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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