public void ProcessRequest(HttpContext context)
{
System.Drawing.Image Cover;
//判断请求的物理路径中，是否存在文件
if (File.Exists(context.Request.PhysicalPath))
{
//加载文件
Cover = Image.FromFile(context.Request.PhysicalPath);
//加载水印图片
Image watermark = Image.FromFile(context.Request.MapPath(WATERMARK_URL));
//实例化画布
Graphics g = Graphics.FromImage(Cover);
//在image上绘制水印
g.DrawImage(watermark, new Rectangle(Cover.Width - watermark.Width, Cover.Height - watermark.Height, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel);
//释放画布
g.Dispose();
//释放水印图片
watermark.Dispose();
}
else
{
//加载默认图片
Cover = Image.FromFile(context.Request.MapPath(DEFAULTIMAGE_URL));
}
//设置输出格式
context.Response.ContentType = "images/jpg";
//将图片存入输出流
Cover.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
Cover.Dispose();
context.Response.End();
}
public void ProcessRequest(HttpContext context)
{
System.Drawing.Image Cover;
//判断请求的物理路径，是否存在文件
if (File.Exists(context.Request.PhysicalPath))
{
//加载文件
Cover = System.Drawing.Image.FromFile(context.Request.PhysicalPath);
//加载水印图片
System.Drawing.Image watermark =
System.Drawing.Image.FromFile(context.Request.MapPath(WATERMARK_URL));
//实例化画布
try
{
Graphics g = Graphics.FromImage(Cover);
//在Cover上绘制水印
//if (Cover.Width > 150 && Cover.Height > 180)
//{
// Cover.Width = 160;
// Cover.Height = 177;
//先第一次是原有图片的属性 第二次就是800 100 操控了第一次又不能左右 第二次的 。。
//g.DrawImage(watermark, new Rectangle(Cover.Width - 1000,
// Cover.Height - 650, 1000, 650),
// 0, 0, 1000, 650, GraphicsUnit.Pixel);
//}
//else
//{
g.DrawImage(watermark, new Rectangle(Cover.Width - watermark.Width,
Cover.Height - watermark.Height, watermark.Width, watermark.Height),
0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel);
//}
//释放画布
g.Dispose();
//释放水印图片
watermark.Dispose();
}catch (Exception ex)
{
ex.Message.ToString();
Cover = System.Drawing.Image.FromFile(context.Request.MapPath(DEFAULTMARK_URL));
}
}
else
{
//加载默认图片
Cover = System.Drawing.Image.FromFile(context.Request.MapPath(DEFAULTMARK_URL));
}
//设置输出格式
context.Response.ContentType = "image/jpeg";
//将图片存入输出流
Cover.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
Cover.Dispose();
context.Response.End();
}
private const string DEFAULTIMAGE_URL = "~/Images/default.jpg"; //无图片时显示的图片
public void ProcessRequest(HttpContext context)
{
string isbn = context.Request.QueryString["isbn"];
//用户请求图片的url路径
string imgUrl = "~/images/bookcovers/" + isbn + ".jpg";
//用户请求图片的物理路径
string filePath = context.Server.MapPath(imgUrl);
Image Cover;
if (File.Exists(filePath))
{
//如果文件存在
//加载封面文件
Cover = Image.FromFile(filePath);
//加载水印图片
Image watermark = Image.FromFile(context.Server.MapPath(WATERMARK_URL));
//实例化画布
Graphics g = Graphics.FromImage(Cover);
//new Rectangle(
//在image上绘制水印
g.DrawImage(watermark, new Rectangle(Cover.Width - watermark.Width, Cover.Height - watermark.Height, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel);
//释放画布
g.Dispose();
//释放水印图片
watermark.Dispose();
}
else
{
//封面图片不存在
//加载默认图片
Cover = Image.FromFile(context.Server.MapPath(DEFAULTIMAGE_URL));
}
//设置输出格式
context.Response.ContentType = "image/jpeg";
//将图片存入输出流
Cover.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
Cover.Dispose();
context.Response.End();
}
void ReleaseDesignerOutlets()
{
if (Cover != null)
{
Cover.Dispose();
Cover = null;
}
if (PlaylistISongArtist != null)
{
PlaylistISongArtist.Dispose();
PlaylistISongArtist = null;
}
if (PlaylistISongTitle != null)
{
PlaylistISongTitle.Dispose();
PlaylistISongTitle = null;
}
}
void ReleaseDesignerOutlets()
{
if (AddToQueueButton != null) {
AddToQueueButton.Dispose ();
AddToQueueButton = null;
}
if (Cover != null) {
Cover.Dispose ();
Cover = null;
}
if (FavouritesArtist != null) {
FavouritesArtist.Dispose ();
FavouritesArtist = null;
}
if (FavouritesTitle != null) {
FavouritesTitle.Dispose ();
FavouritesTitle = null;
}
}
public void ProcessRequest(HttpContext context)
{
Image Cover;
//判断请求的物理路径中，是否存在该文件
if (File.Exists(context.Request.PhysicalPath))
{
//加载文件
Cover = Image.FromFile(context.Request.PhysicalPath);
//加载水印图片
Image watermark = Image.FromFile(context.Request.MapPath(WATERMARK_URL));
//实例化画布
Graphics g = Graphics.FromImage(Cover);
StringFormat fmort = new StringFormat();
fmort.Alignment = StringAlignment.Center;
fmort.LineAlignment = StringAlignment.Center;
//Cover上绘制水印
g.DrawImage(watermark, new Rectangle(Cover.Width - watermark.Width, Cover.Height - watermark.Height, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel);
#region 文字水印
//string logoText = "天府星空(http://www.tfxk.com) 版权所有 盗版必究";
//float fontSize = 9; //字体大小
//float textWidth = logoText.Length * fontSize; //文本的长度
////下面定义一个矩形区域，以后在这个矩形里画上白底黑字
//float rectX = 0;
//float rectY = Cover.Height - 18;
//float rectWidth = Cover.Width;
//float rectHeight = 18;
////声明矩形域
//RectangleF textArea = new RectangleF(rectX, rectY, rectWidth, rectHeight);
//Font font = new Font("宋体", fontSize); //定义字体
//Brush whiteBrush = new SolidBrush(Color.White); //白笔刷，画文字用
//Brush blackBrush = new SolidBrush(Color.FromArgb(207, 207, 207)); //黑笔刷，画背景用
//g.FillRectangle(blackBrush, rectX, rectY, rectWidth, rectHeight);
////创建GDI+绘图图面
//g.DrawString(logoText, font, whiteBrush, textArea, fmort);
////在背景图片上绘制水印文字
//// g.DrawImage(Cover, new System.Drawing.Point(400, 300));
#endregion
//释放画布
g.Dispose();
//释放水印图片
watermark.Dispose();
}
else
{
//加载默认图片
Cover = Image.FromFile(context.Request.MapPath(DEFAULT_PIC));
}
//设置输出格式
context.Response.ContentType = "image/jpeg";
//将图片存入输出流
Cover.Save(context.Response.OutputStream, ImageFormat.Jpeg);
//释放资源
Cover.Dispose();
//停止HTTP响应
context.Response.End();
}