Query String and Custom Controls in asp.net

Question

0.00/5 (No votes)

See more:

I am working on a website which allows users to upload videos to my site. I want to display the uploaded videos dynamically i.e. the videos should be visible whenever an user uploads a video. To do this I have a custom control video player built. It works fine if I provide the "mp4url" directly. However, if I pass the mp4url using querystring, it is not working.

I have a submit page which allows users to upload videos using a fileupload control, and these are uploaded to "Uploads" folder

//Move through the "Uploads" folder and display the thumbnails of the videos after file has been uploaded
    private void LoadThumbnails()
    {
        foreach (string strfile in Directory.GetFiles(Server.MapPath("~/Uploads")))
        {
            ImageButton imageButton = new ImageButton();
            FileInfo fi = new FileInfo(strfile);
            imageButton.ImageUrl = "~/Uploads/" + fi.Name;
            imageButton.Height = Unit.Pixel(100);
            imageButton.Style.Add("padding", "5px");
            imageButton.Width = Unit.Pixel(100);
            imageButton.Click += new ImageClickEventHandler(imageButton_Click);
            Panel1.Controls.Add(imageButton);
        }
    }

    //Redirect to the "Videos" page using Querystring
    protected void imageButton_Click(object sender, ImageClickEventArgs e)
    {
        Response.Redirect("Videos.aspx?VideoURL=" + ((ImageButton)sender).ImageUrl);
    }

There is a page called "Videos" which has a video player, it receives "Mp4Url" using the querystring

ASP.NET

<cc1:VideoPlayer ID="VideoPlayer1"  runat="server" Mp4Url='<%# Request.QueryString["VideoURL"]%>'  Width="400" Height="300" />

This is not working, any idea of what changes will rectify this issue?(Issue is the video player is not playing the video)

P.S.

C#

protected void Page_Load(object sender, EventArgs e)
      {
        VideoPlayer1.Mp4Url = Request.QueryString["VideoURL"];
      }

Even the above code in the code behind file for the Videos page is not working.

If i use

ASP.NET

<cc1:VideoPlayer ID="VideoPlayer1"  runat="server" Mp4Url="Uploads/movie.mp4"  Width="400" Height="300" />

it's working fine. However, that requires manual allocation of the mp4url.

Posted 20-Sep-13 4:51am

GlBr

Add a Solution

2 solutions

Solution 1

This does not look valid to me, trying to assign the url from the query string.

You redirect to "Videos.aspx" using this line:

Response.Redirect("Videos.aspx?VideoURL=" + ((ImageButton)sender).ImageUrl);

In the Page_Load (or the suitable page method as per your need) of "Videos.aspx", you can check the query string and assign it to the custom control?

protected void Page_Load(object sender, EventArgs e)
{
   var url = Request.QueryString["VideoURL"];
   
   if (!string.IsNullOrEmpty(url))
   {
       VideoPlayer1.Mp4Url = url;
   }
}

The <%# .. %> format should be used for "data-binding" and this is not a suitable case for data binding. For example, you could use this in a grid view to bind the value of a property to a grid view column.

Posted 20-Sep-13 5:41am

Karthik. A

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

GlBr · Accepted Answer · 2013-09-20T07:16:00

Solution 2

I managed to correct the code. It was the "~/" which was causing the problem

imageButton.ImageUrl = "Uploads/" + fi.Name;

The above change made it work!

Posted 20-Sep-13 7:16am

GlBr