在MVC3或asp.net中修改KindEditor实现上传图片时添加水印

'<input type="button" class="ke-upload-button" value="' + lang.upload + '" />',

 '<label style="width:60px;">添加水印</label>',
            '<input type="text" name="water" value="请输入水印文字"/>',

String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo) + fileExt;
        String filePath = dirPath + newFileName;
        imgFile.SaveAs(filePath);
        String fileUrl = saveUrl + newFileName;

String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", DateTimeFormatInfo.InvariantInfo);
        String filePath = dirPath + newFileName + fileExt;
        imgFile.SaveAs(filePath);       
        String fileUrl = saveUrl + newFileName + fileExt;
        //添加文字水印
        Image image = System.Drawing.Image.FromFile(filePath);
        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.Red);
        string addText = context.Request.Form["water"];
        g.DrawString(addText, f, b, 10, 10);
        g.Dispose();
        //保存加水印过后的图片,删除原始图片
        string newPath = dirPath + newFileName + "_new" + fileExt;
        image.Save(newPath);
        image.Dispose();
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
        }
        fileUrl = saveUrl + newFileName + "_new" + fileExt;