ScriptCam Integration for .Net: ScriptCamForDotNet Repository

Hi all,

Recently I had to take pictures from web camera in my Asp.Net page. There’s a great flash-based plugin works with jQuery, named ScriptCam. So I been dealing integration of this to my Asp.Net page.

You can see my bio above, I hate (unnecessary) postbacks. So it all works on client, faster, then I store the binary data of captured image in my Session variable. Next page I show it on Page_Load event.

You can see the working example here,
Or you can download the project from here.

That’s my first repository, I hope it becomes helpful for some fellas.

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Asp.Net Server Side: How to get Iframe’s Parent Window Url?

In Asp.Net server sided button’s click event, I somehow needed to find parent window url of an iframe, which means the url you see in the address bar of your web browser.

Let’s think of 2 pages: Parent.aspx and Child.aspx. Child.aspx is loading to an iframe in Parent.aspx. If you have a button in Child.aspx, you will be getting “Child.aspx” result when you use Request.Url method in this button’s click event.

But you see “Parent.aspx” in the address bar, right? So how to get it?

Here you need to work with client side peacefully. Otherwise the server will keep giving you the same result.

First, place a button running at server, add a click event and a client-click event.

    <asp:Button ID="btnFindParentUrl" runat="server" Text="Get Url!" OnClick="btnFindParentUrl_Click" OnClientClick="fillHidden();"></asp:Button>

Put a hidden textbox inside a div with style=”display: none;” (not Visible=”false” for button because if you do client can’t see and fill it):

    <div style="display: none;">
        <asp:TextBox ID="txtHiddenUrlField" runat="server" BorderStyle="None" Font-Size="0px" ForeColor="#F6F6F6" Height="0px" Width="0px"></asp:TextBox>
    </div>

Now place javascript code of fillHidden() function:

    <script type="text/javascript">
        function fillHidden() {
            document.getElementById('<%= txtHiddenUrlField.ClientID %>').value = parent.document.location.href;
        };
    </script>

That’s all you have to do at client side.
Let’s go to the server:

    protected void btnFindParentUrl_Click(object sender, EventArgs e)
    {
        string parentUrl = txtHiddenUrlField.Text;
    }

This way, you should be getting parent url from button in an iframe.

3 Comments

Add a Link Button to Navigate Previous Page

In my Asp.Net web page, I had a trouble with navigating to the previous URL. I guess possibly because of postback, my linkbutton was navigating to the current page when I use this method:

Response.Redirect(Request["HTTP_REFERER"]);

I was unable to give previous page’s URL as a link simply, because there were a lot of data so it always was taking a while when I “navigated to the last page” with this method.

Then I saw this great JavaScript method and it works perfectly so far. All you have to do is to insert a Asp:LinkButton then add this to your Page_Load event:

lnkBtnPreviousPage.Attributes.Add("onClick", "javascript:history.back(); return false;");
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