Dynamic Button Visibility

Question

I have some checkbox on page,like checkhold,

 

i get some rows from database ,which have control name,i want to use that sql data and using that set the control visibility false .

i m stuck in that ,cant find the solution.

 

 

 string checkhold=dt.rows[0]["checkhold"].tostring();

HtmlGenericControl chkforward = (HtmlGenericControl)obj.Form.Page.FindControl(checkhold);

chkforward .Visible = false; 

 

 

where i am wrong?