C# Graphics给图片添加水印

原图 效果图

Image img = Image.FromFile(imgFile);
using (Graphics g = Graphics.FromImage(img))
{
	// 画水印
	if (!String.IsNullOrWhiteSpace(this.Mask))
	{
		Font drawFont = new Font(FamilyName, 12f);
		SolidBrush drawBrush = new SolidBrush(Color.FromArgb(75, Color.White));
		g.DrawString(this.Mask, drawFont, drawBrush, 243, 158);
	}
	// 写文本
	if (!String.IsNullOrWhiteSpace(keyword))
	{
		Font drawFont = new Font(FamilyName, 20f, FontStyle.Bold);
		SolidBrush drawBrush = new SolidBrush(Color.White);
		g.DrawString(keyword, drawFont, drawBrush, 240, 122);
	}
}