Link button should be visble false in gridview

Question

I have grigview as follows

Course                                Code          Days       Startdate        Enddate

Clickhere(Link Button)       ASM              5       05 May 2016 10 May 2016

Clickhere(Link Button)                                     12 May 2016 17 May 2016

Clickhere(Link Button)                                      21 May 2016 25 May 2016

I dont want 2nd row and third row link button in gridview because in gridview

Code(2nd column) second and thrid row code is empty.

Whenever empty in Code i do not want link button. i want to set visble false.

for that my code as follows in Gridview row databound

protected void gvRank_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowType == DataControlRowType.DataRow)

{

LinkButton lnk= (LinkButton)e.Row.FindControl("LinkButton2");

TextBox text = (TextBox)e.Row.FindControl("Code");

if (text == null && lnk == null)

{

lnk.Visble = false;

}

else

{

lnk.Visible = True;

}

}

}

But in gridview output i get as follows

Course                      Code                 Days                 Startdate            Enddate

                                 ASM                     5                05 May 2016 10 May 2016

                                                                                 12 May 2016 17 May 2016

                                                                                 21 May 2016 25 May 2016

In course column all the link button are visible false. i want only the second row and third row link button only visible false.