/// <summary>
/// 产生全数字的验证码
/// </summary>
/// <param name="length"></param>
/// <returns></returns>
public static string VCodeNumber(int length)
{
string result = string.Empty;
for (int i = 0; i < length; i++)
{
result += VerificationCode.GenerateRandomInteger(0, 10);
}
return(result);
}
/// <summary>
/// 根据字符串产生验证码
/// </summary>
/// <param name="_Text"></param>
/// <returns></returns>
public static System.Drawing.Bitmap CreateNewImage(string _Text)
{
int int_ImageWidth = _Text.Length * letterWidth;
Bitmap image = new Bitmap(int_ImageWidth, letterHeight);
Graphics g = Graphics.FromImage(image);
g.Clear(Color.White);
for (int i = 0; i < 2; i++)
{
int x1 = VerificationCode.GenerateRandomInteger(0, image.Width - 1);
int x2 = VerificationCode.GenerateRandomInteger(0, image.Width - 1);
int y1 = VerificationCode.GenerateRandomInteger(0, image.Height - 1);
int y2 = VerificationCode.GenerateRandomInteger(0, image.Height - 1);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
int _x = -12, _y = 0;
for (int int_index = 0; int_index < _Text.Length; int_index++)
{
_x += VerificationCode.GenerateRandomInteger(12, 16);
_y = VerificationCode.GenerateRandomInteger(-2, 2);
string str_char = _Text.Substring(int_index, 1);
str_char = VerificationCode.GenerateRandomInteger(0, 1) == 1 ? str_char.ToLower() : str_char.ToUpper();
Brush newBrush = new SolidBrush(GetRandomColor());
Point thePos = new Point(_x, _y);
g.DrawString(str_char, fonts[VerificationCode.GenerateRandomInteger(0, fonts.Length - 1)], newBrush, thePos);
}
for (int i = 0; i < 10; i++)
{
int x = VerificationCode.GenerateRandomInteger(0, image.Width - 1);
int y = VerificationCode.GenerateRandomInteger(0, image.Height - 1);
image.SetPixel(x, y, Color.FromArgb(VerificationCode.GenerateRandomInteger(0, 255), VerificationCode.GenerateRandomInteger(0, 255), VerificationCode.GenerateRandomInteger(0, 255)));
}
image = TwistImage(image, true, VerificationCode.GenerateRandomInteger(1, 3), VerificationCode.GenerateRandomInteger(4, 6));
g.DrawRectangle(new Pen(Color.LightGray, 1), 0, 0, int_ImageWidth - 1, (letterHeight - 1));
return(image);
}
/// <summary>
/// 创建数字加字母的验证码
/// </summary>
/// <param name="length"></param>
/// <returns></returns>
public static Bitmap CreateImage(int length)
{
string _Text = VerificationCode.VCodeStringNumber(length);
return(CreateNewImage(_Text));
}
