show modal pop and redirect

I have a link on the page and i want when the user is pressing it, to evaluate a method where i check if the usser is logged in. If not, i want to show up a modal popup. I know how to do the back-end checking and how to redirect the user but i have problems with the link button:

<asp:LinkButton ID="LinkButton1" runat="server" 
                        OnClientClick="redirectToWishList()">LinkButton</asp:LinkButton>

When i press it, it does a full postback instead evaluating the method where i show up the modal pop.

Do you have any workaround to not fire a full postback but check the method where i am doing the redirec开发者_C百科t?

Ps: The method which has to fire:

 public void redirectToWishList(object sender, EventArgs e)
{
    ASP.usercontrols_loginpopup_ascx loginUserControl = (ASP.usercontrols_loginpopup_ascx)UtilsStatic.FindControlRecursive(Page, "loginPopUp");
    ModalPopupExtender modal = (ModalPopupExtender)loginUserControl.FindControl("loginPopUp");
    modal.Show();

}

You need to call redirectToWishList as a function (including the parens): redirectToWishList()

<asp:LinkButton ID="LinkButton1" runat="server" 
                        OnClientClick="redirectToWishList();return false;">LinkButton</asp:LinkButton>

Also, if you return false in your function, you do not need to in the tag.

UPDATE

I misunderstood. The OnClientClick is for invoking JavaScript, not running methods in your code-behind. You need to OnClick instead.

Do you return false from your redirectToWishList function?

You shouldn't need the return false in the LinkButton declaration.