/// <summary>
/// 保存商品图片的公共方法
/// 后台上传商品图片，会自动噶呢句输入的缩略图尺寸
/// 生成相应的缩略图
/// </summary>
/// <param name="context"></param>
/// <param name="uploader"></param>
/// <param name="resizedWidth"></param>
/// <param name="resizedHeight"></param>
/// <param name="Msg"></param>
/// <returns></returns>
public static ProductImage SaveProductImg(HttpContext context, FileUpload uploader, int resizedWidth, out string Msg)
{
Msg = String.Empty;
string newImageFile = String.Empty;
string newResizedImageFile = String.Empty;
ProductImage image = new ProductImage();
try
{
//直接取得文件名
string fileName = uploader.FileName.ToString();
//取得上传文件路径
string url = uploader.PostedFile.FileName.ToString();
//获取文件MIME内容类型
string type = uploader.PostedFile.ContentType;
string type2 = fileName.Substring(fileName.IndexOf(".") + 1);
//获取文件大小
int size = uploader.PostedFile.ContentLength;
//判断同名文件
if (File.Exists(url))
{
Msg = "存在同名文件，请修改文件名重新上传";
}
else
{
if (type2 == "gif" || type2 == "jpg" || type2 == "bmp" || type2 == "png")
{
if (size <= 4134904)
{
string basePath = String.Concat(YoeJoyConfig.ImgPhysicalPathBase, "products\\");
string newFileName = String.Concat(Guid.NewGuid(), fileName);
//保存原始图片
uploader.SaveAs(String.Concat(basePath, newFileName));
newImageFile = newFileName;
//保存缩略图片
using (System.Drawing.Image imageObj = System.Drawing.Image.FromStream(uploader.FileContent, true))
{
int originalImageWidth = imageObj.Width;
string thumbnailImageFileName = String.Concat("thumbnail_", newFileName);
string thumbnailImagePath = String.Concat(YoeJoyConfig.ImgPhysicalPathBase, "products\\", thumbnailImageFileName);
//当原始图片的宽度小于设定缩小的宽度，则直接保存该文件
if (resizedWidth >= originalImageWidth)
{
uploader.SaveAs(thumbnailImagePath);
}
else
{
//当原始图片的宽度大于需要缩小的宽度则等比例缩放
int originalImageHeight = imageObj.Height;
int resizedHeight = (resizedWidth * originalImageHeight) / originalImageWidth;
using (System.Drawing.Image thumbnailImg = new Bitmap(resizedWidth, resizedHeight))
{
using (Graphics thumbnailGraphic = Graphics.FromImage(thumbnailImg))
{
//绘制缩略图
thumbnailGraphic.DrawImage(imageObj, new Rectangle(0, 0, resizedWidth, resizedHeight), new Rectangle(0, 0, originalImageWidth, originalImageHeight), GraphicsUnit.Pixel);
//保存缩略图
thumbnailImg.Save(thumbnailImagePath);
}
}
}
newResizedImageFile = thumbnailImageFileName;
}
image.LargeImg = newImageFile;
image.SmallImg = newResizedImageFile;
Msg = "保存成功！";
return(image);
}
else
{
Msg = "文件大于4M，请重新上传";
image = null;
}
}
}
return(image);
}
catch
{
Msg = "Server Error: 保存图片失败";
return(null);
}
}
/// <summary>
/// 保存商品图片的公共方法
/// 后台上传商品图片，会自动噶呢句输入的缩略图尺寸
/// 生成相应的缩略图
/// </summary>
/// <param name="context"></param>
/// <param name="uploader"></param>
/// <param name="resizedWidth"></param>
/// <param name="resizedHeight"></param>
/// <param name="Msg"></param>
/// <returns></returns>
public static ProductImage SaveProductImg(HttpContext context, FileUpload uploader, int resizedWidth, out string Msg)
{
Msg = String.Empty;
string newImageFile = String.Empty;
string newResizedImageFile = String.Empty;
ProductImage image = new ProductImage();
try
{
//直接取得文件名
string fileName = uploader.FileName.ToString();
//取得上传文件路径
string url = uploader.PostedFile.FileName.ToString();
//获取文件MIME内容类型
string type = uploader.PostedFile.ContentType;
string type2 = fileName.Substring(fileName.IndexOf(".") + 1);
//获取文件大小
int size = uploader.PostedFile.ContentLength;
//判断同名文件
if (File.Exists(url))
{
Msg = "存在同名文件，请修改文件名重新上传";
}
else
{
if (type2 == "gif" || type2 == "jpg" || type2 == "bmp" || type2 == "png")
{
if (size <= 4134904)
{
string basePath = String.Concat(YoeJoyConfig.ImgPhysicalPathBase, "products\\");
string newFileName = String.Concat(Guid.NewGuid(), fileName);
//保存原始图片
uploader.SaveAs(String.Concat(basePath, newFileName));
newImageFile = newFileName;
//保存缩略图片
using (System.Drawing.Image imageObj = System.Drawing.Image.FromStream(uploader.FileContent, true))
{
int originalImageWidth = imageObj.Width;
string thumbnailImageFileName = String.Concat("thumbnail_", newFileName);
string thumbnailImagePath = String.Concat(YoeJoyConfig.ImgPhysicalPathBase, "products\\", thumbnailImageFileName);
//当原始图片的宽度小于设定缩小的宽度，则直接保存该文件
if (resizedWidth >= originalImageWidth)
{
uploader.SaveAs(thumbnailImagePath);
}
else
{
//当原始图片的宽度大于需要缩小的宽度则等比例缩放
int originalImageHeight = imageObj.Height;
int resizedHeight = (resizedWidth * originalImageHeight) / originalImageWidth;
using (System.Drawing.Image thumbnailImg = new Bitmap(resizedWidth, resizedHeight))
{
using (Graphics thumbnailGraphic = Graphics.FromImage(thumbnailImg))
{
//绘制缩略图
thumbnailGraphic.DrawImage(imageObj, new Rectangle(0, 0, resizedWidth, resizedHeight), new Rectangle(0, 0, originalImageWidth, originalImageHeight), GraphicsUnit.Pixel);
//保存缩略图
thumbnailImg.Save(thumbnailImagePath);
}
}
}
newResizedImageFile = thumbnailImageFileName;
}
image.LargeImg = newImageFile;
image.SmallImg = newResizedImageFile;
Msg = "保存成功！";
return image;
}
else
{
Msg = "文件大于4M，请重新上传";
image = null;
}
}
}
return image;
}
catch
{
Msg = "Server Error: 保存图片失败";
return null;
}
}