长期做WEB对GDI不熟，画的不对的还请多多指教
public abstract class DrawImageBord
{
protected virtual string BordRuleName
{
get { return string.Empty; }
} protected virtual System.Collections.Hashtable Roles
{
get { return new System.Collections.Hashtable(); }
} string drawString;
int width = 800; //画布的宽度(可计算)
int height = 36;//1CM
int unitWidth = 1; // int currentLocation = 0; public DrawImageBord(string s)
{
drawString = s;
} public virtual void Draw(System.IO.Stream target)
{
Bitmap bm = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bm);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias; //画布和边的设定
g.Clear(Color.White); g.DrawRectangle(Pens.White, 0, 0, width, height); for (int i = 0; i < drawString.Length; i++)
{
this.DrawString(drawString[i].ToString(), g);
}
//
bm.Save(target, ImageFormat.Jpeg);
} protected virtual void DrawString(string s, Graphics g)
{
System.Collections.Hashtable hash = this.Roles;
object o = hash[s];
if (o == null) return;
char[] chars = o.ToString().ToCharArray();
if (chars.Length > 9) return;
SolidBrush blackBrush = new SolidBrush(Color.Black);
SolidBrush witeBrush = new SolidBrush(Color.White); for (int i = 0; i < 5; i++)
{
//画第一个 0 黑条
if (chars[i] == '0')
{
Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(blackBrush, re1);
currentLocation += unitWidth;
}
else
{
Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height);
g.FillRectangle(blackBrush, re1);
currentLocation += 3 * unitWidth;
} //画第6个 5 白条
if ((i + 5) < 9)
{
if (chars[i + 5] == '0')
{
Rectangle re1 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(witeBrush, re1);
currentLocation += unitWidth;
}
else
{
Rectangle re1 = new Rectangle(currentLocation, 0, 3 * unitWidth, height);
g.FillRectangle(witeBrush, re1);
currentLocation += 3 * unitWidth;
}
}
} Rectangle re2 = new Rectangle(currentLocation, 0, unitWidth, height);
g.FillRectangle(witeBrush, re2);
currentLocation += unitWidth; }
} public class CODE39DrawImageBord : DrawImageBord
{
private System.Collections.Hashtable hash = new System.Collections.Hashtable();
protected override string BordRuleName
{
get { return "CODE39"; }
}
public CODE39DrawImageBord(string s) : base(s)
{
} protected override System.Collections.Hashtable Roles
{
get {
if (hash.Count > 0) return hash;
hash.Add("0", "001100100");
hash.Add("1", "100010100");
hash.Add("2", "010010100");
hash.Add("3", "110000100");
hash.Add("4", "001010100");
hash.Add("5", "101000100");
hash.Add("6", "011000100");
hash.Add("7", "000110100"); hash.Add("8", "100100100");
hash.Add("9", "010100100");
hash.Add("A", "100010010");
hash.Add("B", "010010010");
hash.Add("C", "110000010");
hash.Add("D", "001010010");
hash.Add("E", "101000010"); hash.Add("F", "011000010");
hash.Add("G", "000110010");
hash.Add("H", "100100010");
hash.Add("I", "010100010");
hash.Add("J", "001100010");
hash.Add("K", "100010001");
hash.Add("L", "010010001"); hash.Add("M", "110000001");
hash.Add("N", "001010001");
hash.Add("O", "101000001");
hash.Add("P", "011000001");
hash.Add("Q", "000110001");
hash.Add("R", "100100001");
hash.Add("S", "010100001");
hash.Add("T", "001100001");
hash.Add("U", "100011000");
hash.Add("V", "010011000");
hash.Add("W", "110001000");
hash.Add("X", "001011000");
hash.Add("Y", "101001000");
hash.Add("Z", "011001000");
hash.Add("-", "000111000");
hash.Add("%", "100101000");
hash.Add("$", "010101000");
hash.Add("*", "001101000"); return hash; }
}
}//调用
protected void Page_Load(object sender, EventArgs e)
{ CODE39DrawImageBord dr = new CODE39DrawImageBord("*3949178*");
dr.Draw(Response.OutputStream);
//然后print用扫描器读.
}// 39码前后要画*号，如果不画* 号，我这边的扫描器不读.....
:D
还是建议用CODE39的字体. 为什么要自己画呢?