/// <summary>
/// 从颜色列表中随机选取颜色
/// </summary>
/// <param name="Color_L"></param>
/// <returns></returns>
private FontStyleExt GetColor(List <FontStyleExt> Color_L)
{
Random rnd = new Random();
int i = rnd.Next(0, Color_L.Count);
FontStyleExt l = Color_L[i];
Color_L.RemoveAt(i);
return(l);
}
//将验证码生成图片显示
public byte[] CreateCheckCodeImage(out string checkCode)
{
checkCode = this.GenerateCheckCode();
Bitmap image = new Bitmap(55, 20);
Graphics g = Graphics.FromImage(image);
System.IO.MemoryStream ms = new System.IO.MemoryStream();
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 < 8; 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.FromArgb(random.Next(255), random.Next(255), random.Next(255))
), x1, y1, x2, y2);
}
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
List <FontStyleExt> a = GetColorList;
for (int i = 0; i < checkCode.Length; i++)
{
FontStyleExt Ftyle = GetColor(a);
Font font = new Font("Verdana", Ftyle.FontSize, (System.Drawing.FontStyle.Bold));
SolidBrush brush = new SolidBrush(Ftyle.FontColor);
g.DrawString(checkCode.Substring(i, 1), font, brush, GetCodeRect(i), sf);
}
//画图片的边框线
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
//Response.ClearContent();
//Response.ContentType = "image/Gif";
//Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
return(ms.ToArray());
}
