Query String and Custom Controls in asp.net

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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

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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

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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

Query String and Custom Controls in asp.net

2 solutions

Solution 1

Solution 2

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Query String and Custom Controls in asp.net

2 solutions

Solution 1

Solution 2

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