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//配置文件
项目当前地址+虚拟路径地址
<add key="SaveFilePath" value="E:\项目代码\研发部\zzjz\源码\Hzjg.AutoBulidSite\Hzjg.AutoBulidSite.Web\files\infopic\"/>
protected void Page_Load(object sender, EventArgs e)
{
try
{
string sPathOld = "";
string sPathNew = "";
bool isSuccess = false;
//虚拟路径
string ficPath = "";
//返回图片存放地址
Hashtable hash = new Hashtable();
#region 附件信息
HttpFileCollection files = Request.Files;
for (int j = 0; j < files.Count; j++)
{
var file = files[j];
if (!string.IsNullOrEmpty(file.FileName))
{
try
{
string keyid = Request.QueryString["keyid"];
if (!string.IsNullOrWhiteSpace(keyid))
{
#region 上传图片，并返还地址
//组合虚拟路径
ficPath = "/files/infopic/" + DateTime.Now.Year.ToString() + "/" + DateTime.Now.Month.ToString() + "/" + DateTime.Now.Day.ToString() + "/" + keyid + Path.GetExtension(file.FileName);
//旧的物理路径
sPathOld = Hzjg.Common.Config.ConfigManage.fGetAppConfig("SaveFilePath") + DateTime.Now.Year.ToString() + "\\" + DateTime.Now.Month.ToString() + "\\" + DateTime.Now.Day.ToString() + "\\old" + keyid + Path.GetExtension(file.FileName);
string sPath = Path.GetDirectoryName(sPathOld);
if (!Directory.Exists(sPath))
{
Directory.CreateDirectory(sPath);
}
file.SaveAs(sPathOld);
//压缩过的图片，新的物理路径
sPathNew = Hzjg.Common.Config.ConfigManage.fGetAppConfig("SaveFilePath") + DateTime.Now.Year.ToString() + "\\" + DateTime.Now.Month.ToString() + "\\" + DateTime.Now.Day.ToString() + "\\" + keyid + Path.GetExtension(file.FileName);
isSuccess = GetPicThumbnail(sPathOld, sPathNew, 500, 500, 80);
File.Delete(sPathOld);
#endregion
}
}
catch (Exception ex) { }
}
}
#endregion
if (isSuccess)
{
hash["PHOTOID"] = ficPath;
}
else
{
hash["PHOTOID"] = "";
}
Response.AddHeader("Content-Type", "text/html; charset=UTF-8");
Response.Write(Hzjg.GlobalExpand.ToJson(hash));
}
catch (Exception ex)
{
Hzjg.Common.Utility.Log.fWriterLog("信息图片上传操作页面加载出错", ex);
}
}
#region 无损压缩图片
/// <summary>
/// 无损压缩图片
/// </summary>
/// <param name="sFile">原图片</param>
/// <param name="dFile">压缩后保存位置</param>
/// <param name="dHeight">高度</param>
/// <param name="dWidth">宽度</param>
/// <param name="flag">压缩质量 1-100</param>
/// <returns></returns>
public bool GetPicThumbnail(string sFile, string dFile, int dHeight, int dWidth, int flag)
{
System.Drawing.Image iSource = System.Drawing.Image.FromFile(sFile);
ImageFormat tFormat = iSource.RawFormat;
int sW = 0, sH = 0;
//按比例缩放
Size tem_size = new Size(iSource.Width, iSource.Height);
if (tem_size.Width > dHeight || tem_size.Width > dWidth)
{
if ((tem_size.Width * dHeight) > (tem_size.Height * dWidth))
{
sW = dWidth;
sH = (dWidth * tem_size.Height) / tem_size.Width;
}
else
{
sH = dHeight;
sW = (tem_size.Width * dHeight) / tem_size.Height;
}
}
else
{
sW = tem_size.Width;
sH = tem_size.Height;
}
Bitmap ob = new Bitmap(dWidth, dHeight);
Graphics g = Graphics.FromImage(ob);
g.Clear(Color.WhiteSmoke);
g.CompositingQuality = CompositingQuality.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(iSource, new Rectangle((dWidth - sW) / 2, (dHeight - sH) / 2, sW, sH), 0, 0, iSource.Width, iSource.Height, GraphicsUnit.Pixel);
g.Dispose();
//以下代码为保存图片时，设置压缩质量
EncoderParameters ep = new EncoderParameters();
long[] qy = new long[1];
qy[0] = flag;//设置压缩的比例1-100
EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
ep.Param[0] = eParam;
try
{
ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo jpegICIinfo = null;
for (int x = 0; x < arrayICI.Length; x++)
{
if (arrayICI[x].FormatDescription.Equals("JPEG"))
{
jpegICIinfo = arrayICI[x];
break;
}
}
if (jpegICIinfo != null)
{
ob.Save(dFile, jpegICIinfo, ep);//dFile是压缩后的新路径
}
else
{
ob.Save(dFile, tFormat);
}
return true;
}
catch
{
return false;
}
finally
{
iSource.Dispose();
ob.Dispose();
}
}
#endregion
项目配置文件虚拟路径
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原文地址：http://www.cnblogs.com/zecVip/p/5783362.html
