Hyperlink won't work when creating a unique url? C# asp.net

Question

<asp:SqlDataSource ID="itemsforsale" runat="server"
     ConnectionString="<%$ ConnectionStrings:ElmtreeConnection  %>"
     SelectCommand="SELECT * FROM Products WHERE Products.CategoryId = @CategoryId">

     <SelectParameters>
         <asp:QueryStringParameter Name="CategoryId" 
              QueryStringField="CategoryId" Type="Int32" />
     </SelectParameters>
</asp:SqlDataSource>

<asp:HyperLink ID="hyperlink" runat="server" 
     NavigateUrl='<%# "ItemsForSale.aspx?CategoryId"+Eval("CategoryId") %>' 
     Text="Beauty"></asp:HyperLink>

This is my markup. I'm not getting any errors when loading the page, however the link is not working. Can anyone give me any insight as to why?

Martin Parenteau · Accepted Answer · 2016-05-06 12:06:34Z

3

An equal sign is missing in the URL:

NavigateUrl='<%# "ItemsForSale.aspx?CategoryId=" + Eval("CategoryId") %>'

If the HyperLink is not in a databound control, you must call its DataBind method (or the DataBind method of the Page itself) in Page_Load to make sure that its databinding expression is evaluated:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        hyperlink.DataBind();
        ...
    }
}

edited May 6, 2016 at 12:06

answered May 6, 2016 at 0:11

Martin Parenteau

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3 Comments

Ash Over a year ago

Thanks for your answer, however this still hasn't solved the problem.

Martin Parenteau Over a year ago

I added another suggestion in my answer.

Ash Over a year ago

Thanks, this worked! Been at this for days, you're a life saver.

Jonathon Chase · Accepted Answer · 2016-05-05 23:30:06Z

1

You're essentially creating a Url to the address ItemsForSale.aspx. Prefix your URL with ~/ to have it recognized as a route relative to your base url.

answered May 5, 2016 at 23:30

Jonathon Chase

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3 Comments

Ash Over a year ago

I tried that, and it's still not working. When I click the hyperlink, it's dead. It's not directing me to any page.

Jonathon Chase Over a year ago

Have you confirmed that you can navigate to that page at all?

Ash Over a year ago

Yes, can definitely navigate to the page.

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