I have an asp:hyperlink control as part of a gridview template. The code in the aspx page is given below:

asp:HyperLink runat="server" ID="lnkEdit" ToolTip="Edit article" NavigateUrl='<%# GetUrl(Eval("ID").ToString(), Eval("CategoryID").ToString()) %>' ImageUrl="~/Images/Edit.gif"

The NavigateUrl value is obtained from the codebehind method GetUrl(string, string). The code works fine and is as follows:

protected string GetUrl(string id, string categoryID) { var CategoryID = string.Empty; if (!String.IsNullOrEmpty(Request.QueryString["CatID"])) { CategoryID = Request.QueryString["CatID"].ToString(); } else if (!String.IsNullOrEmpty(categoryID)) { CategoryID = categoryID; } return "~/TBSArticles/WriteOrEditArticle.aspx?ID=" + id + "&CatID=" + CategoryID; }

I want to replace the code behind method by using a ternary operator within the aspx page. I tried something like below, but didn't work:

asp:HyperLink runat="server" ID="lnkEdit" ToolTip="Edit article" NavigateUrl='<%# "~/TBSArticles/WriteOrEditArticle.aspx?ID=" + Eval("ID") + "&CatID=" + Eval(this.Request.QueryString["CatID"].ToString()) != ""? this.Request.QueryString["CatID"] : Eval("CategoryID")) %>' ImageUrl="~/Images/Edit.gif"

Any help will be greatly appreciated.

Thanks