problem with gridview

I'me giving an example code using this you can control property on any control in Gridview in Templated Field

protected void loadcontrols()
    {
        for (int i = 0; i < gvReply.Rows.Count; i++)
        {
            Button btnDelete = gvReply.Rows[i].FindControl("btnDelete") as Button;
            
            HiddenField hf=gvReply.Rows[i].FindControl("hfID") as HiddenField;
            
            if (Session["userid"].ToString() == hf.Value)
            {
               btnDelete.Visible = true;
              
            }
        }
    } 

it is the example of a Button control , instead you can control the property of checkbox also.