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(fù)
??????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(dāng)前文件的相對目錄.在asp.net里"/"必須用"//"代替，把"upload//"改成"//upload//"就成了取當(dāng)前文件的絕對目錄了
??????fileupload.PostedFile.SaveAs(Server.MapPath("upload//"+newname+newext));
??????//得到這個文件的相關(guān)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("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("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="upload/"+newname.ToString()+newext.ToString();
??????smallpic="upload/small_"+newname.ToString()+newext.ToString();
?????}

?

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