循环页面控件，并设置属性的问题

[乾K大挪移]

            for (int i = 0; i < this.Controls.Count; i++)
            {
                foreach (Control control in this.Controls[i].Controls)
                {
                    if (control.HasControls())
                    {
                        //子控件          
                    }
                    else
                    {
                        if (control is TextBox)
                        {
                            ((TextBox)control).Enabled = false;
                        }
                    }
                }
            }

我要循环页面上的TextBox控件，并且设置为不可用，为什么这样不行？有什么好方法？

[风骑士之怒]

      foreach (Control control in this.Form.Controls)
        {
            if (control is TextBox)
            {
                TextBox textbox = (TextBox)control;
                textbox.Text = "1";
            }
        }

[柳泉青云]

protected void Button1_Click(object sender, EventArgs e)
{
SetPageAllTextBox(this.Controls);
}
public void SetPageAllTextBox(ControlCollection objControlCollection)
{
foreach (System.Web.UI.Control objControl in objControlCollection)
{
if (objControl.HasControls())
{
SetPageAllTextBox(objControl.Controls);
}
else
{
//判断objControl的类型
if (objControl is System.Web.UI.WebControls.TextBox)
{
((TextBox)objControl).Enabled =false;
}
}
}
}

[shaoliang520xi]

foreach (Control control in this.Form.Controls)
{
if (control is TextBox)
{
TextBox textbox = (TextBox)control;
textbox.Enabled = false;
}
}