/// <summary>
/// 保存文件 返回对象
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
public UserPictureFile SavePostedFile(HttpPostedFile file)
{
byte[] btImgs = new byte[file.ContentLength];
file.InputStream.Read(btImgs, 0, btImgs.Length);
///压缩图片
System.Drawing.Image original_image = System.Drawing.Image.FromStream(file.InputStream); //使用流创建图片
int width = original_image.Width; //图片的宽度
int height = original_image.Height; //图片的高度
ComputWidthHeight(ref width, ref height);
System.Drawing.Image newImg = PictureFileConverter.GetThumbnailImage("", width, height, file.InputStream);
byte[] newBytes = PictureFileConverter.ImageToByteArray(newImg, System.Drawing.Imaging.ImageFormat.Jpeg);
string fileBase64Str = Convert.ToBase64String(newBytes);
newImg.Dispose(); //释放
file.InputStream.Dispose(); //释放
original_image.Dispose(); //释放
///压缩图片 结束
UserPictureFile model = new UserPictureFile();
model.FileContent = fileBase64Str;
model.Extension = file.ContentType;
model.FileName = file.FileName;
model.OperatorId = string.Empty;
model.PictureFileNo = DateTime.Now.ToString("yyyyMMddHHmmssfff") + ThreadSafeRandom.Next(1000).ToString("000");
InsertPicFile(model);
return(model);
}
public void ProcessRequest(HttpContext context)
{
int width = Convert.ToInt32(context.Request.QueryString["width"]);
int height = Convert.ToInt32(context.Request.QueryString["height"]);
string pictureFileNo = context.Request.QueryString["pictureFileNo"].ToString();
string type = context.Request.QueryString["type"].ToString();
//V2版 CDN图片
//string picUrl = ServicePic.ResolveUGCImage(GetType(type), pictureFileNo, width, height);
//context.Response.Redirect(picUrl, true);
#region V1版读取--直接读取数据库中的二进制
CommonService service = new CommonService();
string extension = string.Empty;
Image outImage = service.GetPic(width, height, pictureFileNo, type, out extension);
context.Response.ContentType = "image/jpeg";
context.Response.Clear();
context.Response.BufferOutput = true;
if (null == outImage)
{
//输出默认图片
Bitmap defalut = PictureFileConverter.GetDefalutPic(width, height);
defalut.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
context.Response.End();
}
switch (extension)
{
case "jpg":
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case "gif":
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
break;
case "png":
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png);
break;
default:
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
}
context.Response.End();
#endregion
}
public ImageModel GetPic(int width, int height, string pictureFileNo, string type)
{
//如果图片不存在的错误----
string filecontent = string.Empty;
string picExtension = string.Empty;
try
{
switch (type)
{
case "1":
ProductPictureFile model = DapperUtil.QueryByIdentityWithNoLock <ProductPictureFile>(pictureFileNo);
filecontent = model.FileContent;
picExtension = model.Extension;
break;
case "2":
SystemPictureFile model2 = DapperUtil.QueryByIdentityWithNoLock <SystemPictureFile>(pictureFileNo);
filecontent = model2.FileContent;
picExtension = model2.Extension;
break;
case "3":
UserPictureFile model3 = DapperUtil.QueryByIdentityWithNoLock <UserPictureFile>(pictureFileNo);
filecontent = model3.FileContent;
picExtension = model3.Extension;
break;
}
}
catch (Exception)
{
return(new ImageModel());
}
Image outImage = PictureFileConverter.GetThumbnailImage(filecontent, width, height);
ImageModel imgModel = new ImageModel
{
Extension = picExtension,
Image = outImage
};
return(imgModel);
}
public void ProcessRequest(HttpContext context)
{
int width = Convert.ToInt32(context.Request.QueryString["width"]);
int height = Convert.ToInt32(context.Request.QueryString["height"]);
string pictureFileNo = context.Request.QueryString["pictureFileNo"].ToString();
string type = context.Request.QueryString["type"].ToString();
CommonService service = new CommonService();
string extension = string.Empty;
string cacheKey = string.Format("PicRead_{0}_{1}_{2}_{3}", pictureFileNo, width, height, type);
Image outImage;
ImageModel imageModel = (ImageModel)HttpRuntime.Cache.Get(cacheKey);
if (imageModel == null)
{
imageModel = service.GetPic(width, height, pictureFileNo, type);
if (imageModel != null)
{
HttpRuntime.Cache.Add(cacheKey, imageModel, null, DateTime.Now.AddMinutes(15), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null);
}
}
outImage = imageModel.Image;
switch (imageModel.Extension)
{
case ".jpg":
context.Response.ContentType = "image/jpeg";
break;
case ".gif":
context.Response.ContentType = "image/gif";
break;
case ".png":
context.Response.ContentType = "image/png";
break;
default:
context.Response.ContentType = "image/jpeg";
break;
}
context.Response.Clear();
context.Response.BufferOutput = true;
if (null == outImage)//输出默认图片--图片不存在时
{
Bitmap defalut = PictureFileConverter.GetDefalutPic(width, height);
defalut.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
context.Response.End();
}
switch (imageModel.Extension)
{
case ".jpg":
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case ".gif":
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);
break;
case ".png":
using (MemoryStream ms = new MemoryStream())
{
outImage.Save(ms, ImageFormat.Png);
ms.WriteTo(context.Response.OutputStream);
}
//outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Png);
break;
default:
outImage.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
}
context.Response.End();
}
