遍历panel 上的控件，然后操作

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using DevComponents.DotNetBar;
using DevComponents.DotNetBar.Controls;

namespace CsharpTest
{
public partial class Form1 : Form
    {
public Form1()
        {
            InitializeComponent();
        }

private void btnAdd_Click(object sender, EventArgs e)
        {
foreach(Control c in this.panelEx1.Controls)
            {
if(c is DevComponents.DotNetBar.Controls.TextBoxX)
                {
                    c.Text = "123";
                }else
                {
                    c.Text = "名称！";
                }
            }
        }

private void btnClear_Click(object sender, EventArgs e)
        {
foreach(Control d in this.panelEx1.Controls)
            {
if(d is DevComponents.DotNetBar.Controls.TextBoxX)
                {
                    d.Text = "";
                }
else
                {
                    d.Text = "更改后的名称";
                }
            }
        }
    }
}

        private void ClearText()
        {
foreach (Control myControl in this.panelTable.Controls)
            {
if (myControl is DevComponents.DotNetBar.LabelX)
                {
continue;
                }

                myControl.Text = "";
            }
        }