我正在尝试构建一个下载视频文件的网页,它可以工作,但我的 android 智能手机有问题。有 2 种形式:Index和frmDownloadFile
索引.aspx
public partial class Index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//process code and redirect to frmDownloadFile.aspx
Response.Redirect("frmDownloadFile.aspx?id=" + id + "&Name=" + name);
}
}
具有 2 个属性重载(id 和 name)的 URL:
192.168.93.194/DownloadVideo/Index.aspx?id=0096170731874&name=video.3gp
索引表单重定向到:
frmDownloadFile.aspx:
public partial class frmDownloadFile : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//cBusinessRules is a class where i put methods that perform database tasks
cBusinessRules cb = new cBusinessRules();
string req = Request.QueryString["name"];
string fName = System.String.Format(@"C:\{0}", req);//since I've located the video file on C:\ directory
FileInfo fi = new FileInfo(fName);
long sz = fi.Length;
Response.ClearContent();
Response.AppendHeader("Content-Disposition", string.Format("attachment; filename={0}", System.IO.Path.GetFileName(fName)));
Response.ContentType = "video/3gp";
Response.TransmitFile(fName);
//the function below calls a query to increment the number of times the video was downloaded
cb.IncrementFlag(Request.QueryString["id"], Request.QueryString["name"]);
Response.End();
}
}
}
现在,当我将 URL 启动到我的 android 浏览器中时,我注意到frmDownloadFile的页面加载被访问了两次,并且回发未设置为 true,这与我在台式计算机浏览器上测试时不同。此外,当我在 iphone 上测试它时,它被访问了 5 次......所以问题是视频下载的次数在数据库中增加了两次。有什么建议么?