ASP.NET上传图片后,要加上水印.比如网址. 文字为白色.但是当背景是白色的时候,水印根本看不到. 到处搜索资料,找画文字阴影的办法. 找了好几个,最后找了个老外的文章,和.Net自带文档里的说法一样. 居然是先画2-5个alpha值不同的灰色文字当阴影.. 再在上面,画正常颜色的文本....汗!!!!!!!!!!!!!!!!!!111 没有办法了,只好将就用了.效果还一般.

Font font=new Font("Arial Black",15,FontStyle.Bold);

 SizeF sf=g.MeasureString("ImgGood.Com",font);

 PointF pf=new PointF(); pf.X=(250-sf.Width)/2;

 pf.Y=(bHeight-sf.Height)/2;

 //新建水印bmp

 Bitmap floatBmp=new Bitmap((int)sf.Width+3,(int)sf.Height+3,System.Drawing.Imaging.PixelFormat.Format32bppArgb);

 //Bitmap floatBmp=new Bitmap(250,100); //Bitmap floatBmp=new Bitmap((int)sf.Width,(int)sf.Height); Graphics fg=Graphics.FromImage(floatBmp);

//画上阴影字符 PointF pt=new PointF(0,0);

 System.Drawing.Brush TransparentBrush0 = new System.Drawing.SolidBrush( System.Drawing.Color.FromArgb(50,System.Drawing.Color.Black ) ) ;

 System.Drawing.Brush TransparentBrush1 = new System.Drawing.SolidBrush( System.Drawing.Color.FromArgb(20,System.Drawing.Color.Black ) ) ;

 fg.DrawString("ImgGood.Com",font,TransparentBrush0,pt.X,pt.Y+1);

 fg.DrawString("ImgGood.Com",font,TransparentBrush0,pt.X+1,pt.Y);

 fg.DrawString("ImgGood.Com",font,TransparentBrush1,pt.X+1,pt.Y+1);

 fg.DrawString("ImgGood.Com",font,TransparentBrush1,pt.X,pt.Y+2);

 fg.DrawString("ImgGood.Com",font,TransparentBrush1,pt.X+2,pt.Y);

 TransparentBrush0.Dispose();

 TransparentBrush1.Dispose();

 //画上LOGO字符 fg.SmoothingMode=System.Dra

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在google里搜索更多上传图片画带阴影的水印.(C#)

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