asp.netasplinkbutton

Disable the postback on an <ASP:LinkButton>

I have an ASP.NET linkbutton control on my form. I would like to use it for javascript on the client side and prevent it from posting back to the server. (I'd like to use the linkbutton control so I can skin it and disable it in some cases, so a straight up tag is not preferred).

How do I prevent it from posting back to the server?

Solution

  • ASPX code:

    <asp:LinkButton ID="someID" runat="server" Text="clicky"></asp:LinkButton>

    Code behind:

    public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        someID.Attributes.Add("onClick", "return false;");
    }
}

    What renders as HTML is:

    <a onclick="return false;" id="someID" href="javascript:__doPostBack('someID','')">clicky</a>

    In this case, what happens is the onclick functionality becomes your validator. If it is false, the "href" link is not executed; however, if it is true the href will get executed. This eliminates your post back.