Using Databinder.eval to generate a hyperlink

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I am using the following code to create a table of hyperlinks. <BR><ASP:Repeater id="categories" runat="server"><BR> <itemtemplate><BR> <a href=http://aspmessageboard.com/archive/index.php/results.aspx?category=<%# DataBinder.Eval(Container.DataItem, "catCategory")%>><%# Container.DataItem("catCategory")%></a><BR><BR> </itemtemplate><BR> </ASP:Repeater><BR>The problem is that some of the categories have spaces in them. On the ones that have spaces the link ends at the space. For example, I have a category of "Hard Drives" and the generated link ends up like this: <BR>http://192.168.0.99/results.aspx?category=Hard<BR><BR>Does anyone know how to fix this? I have tried several different ways but none of them seem to work.<BR><BR><BR>Thanks!