遍历页面控件

       
 int cntControl = this.Page.Controls.Count;
        StringBuilder sb = new StringBuilder();
        sb.Append("<table border='1' style='width:500px;'>");
        for (int i = 0; i < cntControl ; i++)
        {
            foreach (Control ctrl in this.Page.Controls[i].Controls)
            {
                if (ctrl is Button)
                {
                    if (ctrl.ID.Substring(0, 3).Equals("btn"))
                    {
                        sb.Append("<tr><td>" + ctrl.ID + "</td></tr>");
                    }
                    else
                    {
                        sb.Append("<tr><td><span style='color:red;'>" + ctrl.ID + "</span></td></tr>");
                    }
                }

                if (ctrl is GridView)
                {
                    if (ctrl.ID.Substring(0, 3).Equals("gvw"))
                    {
                        sb.Append("<tr><td>" + ctrl.ID + "</td></tr>");
                    }
                    else
                    {
                        sb.Append("<tr><td><span style='color:red;backgroud-color:yellow'>" + ctrl.ID + "</span></td></tr>");
                    }
                }
            }
        }
        sb.Append("</table>");
        Label lblPageCheck = new Label();
        lblPageCheck.Text = sb.ToString();
        Page.Controls.Add(lblPageCheck);