Lanap.BotDetect.ImageFormatEnum Reference (BotDetect v2.0; deprecated)

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Please Note

The information on this page is out of date and applies to a deprecated version of BotDetect™ CAPTCHA (v2.0).

An up-to-date equivalent page for the latest BotDetect Captcha release (v3) is BotDetect v3 ASP.NET Captcha API reference.

General information about the major improvements in the current BotDetect release can be found at the What's New in BotDetect v3.0 page.

Lanap.BotDetect.ImageFormatEnum is a member of the BotDetect ASP.NET CAPTCHA interface that contains all valid values of the Lanap.BotDetect.Captcha control's ImageFormat property. It represents the CAPTCHA image target binary format and MIME type.

Members

[VB.NET]

Public Enum ImageFormatEnum
  Jpeg
  Bmp
  Gif
  Png
End Enum

[C#]

public enum ImageFormatEnum
{
  Jpeg,
  Bmp,
  Gif,
  Png
}

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Default value

If the ImageFormat property is not set, ImageFormatEnum.Jpeg is used by default.

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Usage

[VB.NET]

' Example 1: simple assignment
SampleCaptcha.ImageFormat = ImageFormatEnum.Png

[C#]

// Example 1: simple assignment
SampleCaptcha.ImageFormat = ImageFormatEnum.Png;

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Notes

All of the 50 TextStyle values give good results with the default ImageFormatEnum.Jpeg image format. However, some algorithms give low-quality results when using the ImageFormatEnum.Gif image format, so you should take care not to change the image format without checking the resulting impact on CAPTCHA readability.

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