asp.net調用網頁右鍵另存爲圖片方法,這樣可以點擊圖片的時候默認是下載而不是簡單的打開圖片功能。
網頁根目錄新建一個DownloadFile.aspx頁面,下面代碼直接放去DownloadFile.aspx前臺頁面。其他頁面需要用到下面功能,超鏈接中使用: DownloadFile.aspx?file=要下載的圖片Url
<%@ Page Language="C#" %>
<%
//使用方法
//DownloadFile.aspx?file=要下載的圖片url
string url = HttpContext.Current.Request.Url.Query.ToLower();
//file=dddd.jpg
url = url.Replace("?file=", "");
Response.BufferOutput = false;
Response.Clear();
Response.ContentType = "application/x-msdownload";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + url);
Response.ContentType = "application/octstream";
Response.CacheControl = "Private";
System.IO.Stream stm = new System.IO.FileStream(Server.MapPath(url), System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read);
Response.AppendHeader("Content-length", stm.Length.ToString());
System.IO.BinaryReader br = new System.IO.BinaryReader(stm);
byte[] bytes;
for (Int64 x = 0; x < (br.BaseStream.Length / 4096 + 1); x++)
{
bytes = br.ReadBytes(4096);
Response.BinaryWrite(bytes);
System.Threading.Thread.Sleep(5); //休息一下,防止耗用帶寬太多。
}
stm.Close();
%>