if(fileupload.PostedFile!=null)

{

//addto為要添加的屬性，aboutfile為文件說明

string nam = fileupload.PostedFile.FileName ;

//取得文件名(抱括路徑)里最后一個"."的索引

int i= nam.LastIndexOf(".");

//取得文件擴展名

string newext =nam.Substring(i);

//這里我自動根據(jù)日期和文件大小不同為文件命名,確保文件名不重復

DateTime now = DateTime.Now;

string newname=now.DayOfYear.ToString()+fileupload.PostedFile.ContentLength.ToString();

//保存文件到你所要的目錄,這里是IIS根目錄下的upload目錄.你可以改變.

//注意: 我這里用Server.MapPath()取當前文件的相對目錄.在asp.net里"/"必須用"http://"代替，把"https://upload.ynpxrz.com/upload//"改成"http://upload//"就成了取當前文件的絕對目錄了

fileupload.PostedFile.SaveAs(Server.MapPath("https://upload.ynpxrz.com/upload//"+newname+newext));

//得到這個文件的相關屬性:文件名,文件類型,文件大小

//fname.Text=myFile.PostedFile.FileName;

//fenc.Text=myFile.PostedFile.ContentType ;

//fsize.Text=myFile.PostedFile.ContentLength.ToString();

//下面是生成縮略圖

System.Drawing.Image image,aNewImage;

int width,height,newwidth,newheight;

image=System.Drawing.Image.FromFile(Server.MapPath("https://upload.ynpxrz.com/upload/"+newname.ToString()+newext.ToString()));

System.Drawing.Image.GetThumbnailImageAbort callb =new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);

width=image.Width;

height=image.Height;

if(firstpageshow.SelectedValue.ToString()=="1"&&fenlei.SelectedValue.ToString()=="5")

{

newwidth=203;newheight=86;

newheight=height*newwidth/width;

}

else if(isweekman.SelectedValue.ToString()=="1")

{

newwidth=171;newheight=111;

newheight=height*newwidth/width;

}

else if(firstpageshow.SelectedValue.ToString()=="1"&&fenlei.SelectedValue.ToString()=="3")

{

newwidth=171;newheight=111;

newheight=height*newwidth/width;

}

else

{

newwidth=62;newheight=80;

newheight=height*newwidth/width;

}

aNewImage=image.GetThumbnailImage(newwidth,newheight,callb,new System.IntPtr());

aNewImage.Save(Server.MapPath("https://upload.ynpxrz.com/upload//"+"small_"+newname+newext));

image.Dispose();

//生成縮略圖 生成并保存完畢，保存名是在原圖名前加了一個small_。

pic="https://upload.ynpxrz.com/upload/"+newname.ToString()+newext.ToString();

smallpic="https://upload.ynpxrz.com/upload/small_"+newname.ToString()+newext.ToString();

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