Radgrid Itemtemplate how to use If else condition to set Preprocessor directives

[win]

In the radgrid Itemtemplate how to use if else in the Preprocessor directives .Following code im using <%#eval("user-id)%> ,i need a check if user_id is null then #eval(secondcolumnid)  so i used
<ItemTemplate>
                                                    <a href="Userinfo.aspx?User_Id=<%if(#Eval("User_Id")!=null){#Eval("User_Id")} %>">edit</a> <%#Eval("Last_Name") %>,
                                                    <%#Eval("First_Name") %>
                                                </ItemTemplate>
If i use like this it throws me an error Preprocessor directives must appear as the first non-whitespace character on a line .
So what is the best way to solve this solution.

<telerik:RadGrid ID="Grd1" runat="server" AutoGenerateColumns="False" AllowPaging="True">
<MasterTableView DataKeyNames="userid" CellSpacing="1">
<Columns>
<telerik:GridClientSelectColumn ButtonType="PushButton" />
<telerik:GridTemplateColumn HeaderText="Manager">
<ItemTemplate>
<a href="userinfo.aspx?User_Id=<%#Eval("User_Id") %>">edit</a> <%#Eval("Last_Name") %>,<%#Eval("First_Name") %>
</ItemTemplate>
</telerik:GridTemplateColumn>
</Columns>
</MasterTableView>
<ClientSettings Selecting-AllowRowSelect="true">
<Selecting AllowRowSelect="True" />
</ClientSettings>
</telerik:RadGrid>

[Iana Tsolova]

Hello win,

I am afraid the desired directives are not supported in ASP.NET. Therefore I suggest that you add the two labels for the both conditions and make only one of the visible at a time.

I hope this helps.

Kind regards,
Iana
the Telerik team

[win]

Thank you will try that.