Asp.Net文件下载

文件下载

public void ProcessRequest(HttpContext context)
{
    context.Response.ContentType = "text/plain";
    //下载当前路径下的   QQ截图20160720184811.png， 如果文件名不Encode的话，IE下载会文件名乱码
    string encodeFileName = context.Server.UrlEncode("QQ截图20160720184811.png");
    context.Response.AddHeader("Content-Disposition", $"attachment;filename=\"{encodeFileName}\"");
    context.Response.WriteFile("QQ截图20160720184811.png");
}