how to disable link button link when gridview row is empty

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            LinkButton lnk= e.Row.FindControl("yourlinkbuttonID") as LinkButton;
            //assuming the text9 27 may 2015) is written on link button
            if (lnk.Text == "")
            {
                lnk.Visible = false;
            }
        }
    }

private void grdview1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
        {
            try
            {
                if (this.grdview1.Columns[e.ColumnIndex].Name == "Availabledate")
                {
                    if (this.grdview1.Rows[e.RowIndex] != null)
                    {
                        if (string.IsNullOrEmpty(this.grdview1["Availabledate", e.RowIndex].Value.ToString()) )
                        {
                            this.grdview1.Rows.RemoveAt(e.RowIndex);
                        }
                    }
                }
            }
            catch(Exception ex)
            {
            }
}