ashx文件的下载

页面的下载应用

<a href="HandlerDownLoad.ashx?file=07.jpg">下载</a>

HandlerDownLoad.ashx代码

public class HandlerDownLoad : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        string fileName = context.Request.QueryString["file"];
        context.Response.AddHeader("Content-Disposition","attachment;filename=" + context.Server.UrlEncode( fileName));
        string path = context.Request.MapPath("images/upload/" + fileName);//找到路径
        context.Response.WriteFile(path);

    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}