Water Marked 浮水印

from : Pro ASPnetMVCFramework

 

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.Mvc;using System.Drawing;using System.Drawing.Imaging;using System.IO;namespace TestMvcWebApp1.ActionResultEx{    public class WatermarkedImageResult : ActionResult    {        public WatermarkedImageResult() { }        public string ImageFileName { get; private set; }        public string WatermarkText { get; private set; }        public WatermarkedImageResult(string imageFileName, string watermarkText)        {            ImageFileName = imageFileName;            WatermarkText = watermarkText;        }        public override void ExecuteResult(ControllerContext context)        {            using (var image = Image.FromFile(ImageFileName))            using (var graphics = Graphics.FromImage(image))            using (var font = new Font("Arial", 10))            using (var memoryStream = new MemoryStream())            {                // Render the watermark text in bottom-left corner                var textSize = graphics.MeasureString(WatermarkText, font);                graphics.DrawString(WatermarkText, font, Brushes.Black, 10,                    image.Height - textSize.Height - 10);                // Transmit the image in PNG format (note: must buffer it in                // memory first due to GDI+ limitation)284 CHAPTER 9 n CONTROLLERS AND ACTIONS                image.Save(memoryStream, ImageFormat.Png);                var response = context.RequestContext.HttpContext.Response;                response.ContentType = "image/png";                response.BinaryWrite(memoryStream.GetBuffer());            }        }    }}

使用：

 public ActionResult ViewmarkedImage()        {            string ImageFileName = @"C:\Documents and Settings\Administrator\My Documents\My Pictures\oem.gif";            string WatermarkText = "這是我的浮水印";            WatermarkedImageResult result = new WatermarkedImageResult(ImageFileName, WatermarkText);            return result;        }