我想在asp.net页面中处理图像,我想在一个图片上添上另一个图片,比如我有一个大海的图片,还有一个太阳的图片,我怎样把太阳加到大海那张图片上,形成新的一张日出的图片,谢谢!

解决方案 »

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    缩略图水印组件wsImage3.5  
      

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    我在网上找到一个代码,如下:
    private void Btn_Upload_Click(object sender, System.EventArgs e)
            {
                if(UploadFile.PostedFile.FileName.Trim()!="")
                {
                    //上传文件
                    string extension = Path.GetExtension(UploadFile.PostedFile.FileName).ToUpper();
                    string fileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString();
                    string path = Server.MapPath(".") + "/UploadFile/" + fileName + extension;
                    UploadFile.PostedFile.SaveAs(path);                //加文字水印,注意,这里的代码和以下加图片水印的代码不能共存
                    System.Drawing.Image image = System.Drawing.Image.FromFile(path);
                    Graphics g = Graphics.FromImage(image);
                    g.DrawImage(image, 0, 0, image.Width, image.Height);
                    Font f = new Font("Verdana", 32);
                    Brush b = new SolidBrush(Color.White);
                    string addText = AddText.Value.Trim();
                    g.DrawString(addText, f, b, 10, 10);
                    g.Dispose();                //加图片水印
                    System.Drawing.Image image = System.Drawing.Image.FromFile(path);
                    System.Drawing.Image copyImage = System.Drawing.Image.FromFile( Server.MapPath(".") + "/Alex.gif");
                    Graphics g = Graphics.FromImage(image);
                    g.DrawImage(copyImage, new Rectangle(image.Width-copyImage.Width, image.Height-copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel);
                    g.Dispose();                //保存加水印过后的图片,删除原始图片
                    string newPath = Server.MapPath(".") + "/UploadFile/" + fileName + "_new" + extension;
                    image.Save(newPath);
                    image.Dispose();
                    if(File.Exists(path))
                    {
                        File.Delete(path);
                    }                Response.Redirect(newPath);
                }
            }
    那位大侠帮忙给详细解释一下,万分感谢!