/// <summary>
/// 生成验证码
/// </summary>
/// <returns></returns>
public bool ProcessCode()
{
StrCode = GenerateCheckCode(intLength);
if (StrCode == null || StrCode.Trim() == String.Empty)
{
return(false);
}
Bitmap image = new Bitmap((int)Math.Ceiling((intLength * fontSize)), intHeigth);
Graphics g = Graphics.FromImage(image);
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
g.Clear(Color.White);
//画图片的背景噪音线
for (int i = 0; i < 25; i++)
{
int x1 = random.Next(image.Width);
int x2 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int y2 = random.Next(image.Height);
g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
}
Font font = new Font("Times New Roman", fontSize, (FontStyle.Italic | FontStyle.Bold)); // FontStyle.Strikeout
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Black, Color.FromArgb(random.Next(256), random.Next(256), random.Next(256)), 1.2f, true);
g.DrawString(StrCode, font, brush, 2, (float)(intHeigth / 2.0 - fontSize + 4));
//画图片的前景噪音点
for (int i = 0; i < 100; i++)
{
int x = random.Next(image.Width);
int y = random.Next(image.Height);
image.SetPixel(x, y, Color.FromArgb(random.Next()));
}
//画图片的边框线
g.DrawRectangle(new Pen(Color.Gray), 0, 0, image.Width - 1, image.Height - 1);
ImageStream.Close();
ImageStream = new MemoryStream();
image.Save(ImageStream, ImageFormat.Gif);
return(true);
}
catch (Exception ex)
{
LogHelper.WriteLog(ex);
return(false);
}
finally
{
g.Dispose();
image.Dispose();
}
}
public void Byte2Image(ref Image NewImage, byte[] ByteArr, int startIndex)
{
MemoryStream ImageStream = null;
byte[] newArr = new byte[ByteArr.GetUpperBound(0) - startIndex + 1];
Array.Copy(ByteArr, startIndex, newArr, 0, ByteArr.Length - startIndex);
try
{
if (newArr.GetUpperBound(0) > 0)
{
ImageStream = new MemoryStream(newArr);
NewImage = Image.FromStream(ImageStream);
}
else
{
NewImage = null;
}
ImageStream.Close();
}
catch (Exception ex)
{
NewImage = null;
}
}
