Upload an image and draw a shadow watermark. (C #)

ASP. after uploading an image, add a watermark. for example, the URL. the text is white. however, when the background is white, the watermark cannot be seen at all. search for materials and find a method to draw text shadow. I found several, finally found a foreigner's article, and. net comes with the same statement in the documentation. instead, draw 2-5 gray texts with different alpha values as shadows .. then, draw the text of the normal color .... khan !!!!!!!!!!!!!!!!!! 111 there is no way, so I have to use it. the effect is normal. 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; // new watermark 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); // draw the Shadow character 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 (); // draw the LOGO character fg. smoothingMode = System. drawing. drawing2D. smoothingMode. highQuality; // fg. clear (Color. black); fg. drawString ("ImgGood. com ", font, new SolidBrush (Color. white), pt. x, pt. y, StringFormat. genericDefault); // watermark to the big image fg. save (); fg. dispose (); // set the color attribute float [] [] ptsArray = {new float [] {1, 0, 0, 0} of the transparent image }, new float [] {0, 1, 0, 0, 0}, new float [] {0, 0, 1, 0, 0}, new float [] {0, 0, 0, 0.5f, 0}, new float [] {0, 0, 0, 0, 1 }}; ColorMatrix clrMatrix = new ColorMatrix (ptsArray ); imageAttributes imgAttributes = new ImageAttributes (); imgAttributes. setColorMatrix (clrMatrix, ColorMatrixFlag. default, ColorAdjustType. bitmap); g. drawImage (floatBmp, new Rectangle (10, 10, (int) sf. width, (int) sf. height), 0, 0, (int) sf. width, (int) sf. height, GraphicsUnit. pixel, imgAttributes ); // ================================================ ======================================== g. save (); g. dispose (); bigBmp. save (filePath + "B/" + fileName); bigBmp. dispose (); the Code is not hard to solve.