How to disable link button if GridView is not present in a page

Put the break point on the GridView binding code and get it confirm that the data coming from data base or not ..... ? or the Method being called on not ... ?

Yes, data is binding to gridview and I can see the row count as 5(for example). After GridView1.DataBind(); I have added the following code

if(GridView1.Rows.Count>0) //Here rows count=5

{Page.Master.FindControl("LinkButtonExport").Visible = true;}

But it's not enabling the button. I have tried vice-versa too and it is not working and I'm not getting any errors. Is there any alternative approach.

Comment the "if " of the code u gave. i.e doing that it shoud be always visible after executeing the code .... What is the result ... ?

I had tried, still the same.