制作图片水印过程中的颜色缺失问题(有图片说明)

Question

画笔:
SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(0,HexToInt(strColor,"red"), HexToInt(strColor,"green"), HexToInt(strColor,"blue")));

Answer 1

System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(@"E:\quick_template\DefaultPageTemplate\11\DefaultPageBanner.gif");
 Bitmap bmPhoto = new Bitmap(600, 200, PixelFormat.Format32bppRgb);
 
 Graphics grPhoto = Graphics.FromImage(bmPhoto); 
  

// Create string to draw.
String drawString = "文字叠加到图片上";

// Create font and brush.
Font drawFont = new Font("方正舒体", 36);
SolidBrush drawBrush = new SolidBrush(Color.Black);

// Create point for upper-left corner of drawing.
float x = 150.0F;
float y =  50.0F;

// Set format of string.
StringFormat drawFormat = new StringFormat();
//drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;

// Draw string to screen.

 
grPhoto.DrawImage(
imgPhoto,                               // Photo Image object
new Rectangle(0, 0, 600, 200), // Rectangle structure
0,                                      // x-coordinate of the portion of the source image to draw. 
0,                                      // y-coordinate of the portion of the source image to draw. 
600,                                // Width of the portion of the source image to draw. 
200,                               // Height of the portion of the source image to draw. 
GraphicsUnit.Pixel);  

grPhoto.DrawString(drawString, drawFont, drawBrush, x, y, drawFormat);
imgPhoto=bmPhoto;
imgPhoto.Save("c:\\test.gif", ImageFormat.Gif);