ASP.net生成文字图片

string _FontName = Request["fontname"].ToString();

int _FontSize = Convert.ToInt16(Request["fontsize"]);

string _ShowName = Request["str"].ToString();

Bitmap objBitmap = null;

Graphics g = null ;

Font stringFont = new Font(_FontName, _FontSize, FontStyle.Bold );

StringFormat stringFormat = new StringFormat();

stringFormat.FormatFlags = StringFormatFlags.NoWrap;

try

{

objBitmap = new Bitmap(1,1);

g = Graphics.FromImage(objBitmap);

SizeF stringSize = g.MeasureString(_ShowName, stringFont);

int nWidth = (int)stringSize.Width;

int nHeight = (int)stringSize.Height;

g.Dispose();

objBitmap.Dispose();

objBitmap = new Bitmap(nWidth,nHeight);

g = Graphics.FromImage(objBitmap);

g.FillRectangle(new SolidBrush(Color.Yellow), new Rectangle(0,0,nWidth,nHeight));

g.TextRenderingHint = TextRenderingHint.AntiAlias;

g.DrawString(_ShowName, stringFont, new SolidBrush(Color.Black), new PointF(0, 0), stringFormat);

objBitmap.Save(Response.OutputStream, ImageFormat.Gif);

}

catch (Exception ee)

{

Response.Write(ee.ToString());

}

finally

{

if (null != g) g.Dispose();

if (null != objBitmap) objBitmap.Dispose();

Response.End();

}