/// <summary>
/// 将文字转换成图片
/// </summary>
/// <param name="checkCode"></param>
/// <returns></returns>
private System.Drawing.Bitmap CreateCheckCodeImage(string checkCode)
{
if (checkCode == null || checkCode.Trim() == String.Empty)
{
return null;
}
System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 27.0)), 25);
Graphics g = Graphics.FromImage(image);
try
{
//清空图片背景色
g.Clear(Color.White);
//Font font = new System.Drawing.Font("Arial", 16, (System.Drawing.FontStyle.Bold System.Drawing.FontStyle.Italic));
System.Drawing.Font font = new System.Drawing.Font("楷体_GB2312", 16, (System.Drawing.FontStyle.Bold));
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new System.Drawing.Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(checkCode, font, brush, 2, 2);
//画图片的波形滤镜效果
//画图片的边框线
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
return image;
}
finally
{
//g.Dispose();
//image.Dispose();
}
}