清空页面上所有textBox的值

private void ClearText()
{
foreach (Control ctl in this.Controls)
{
this.txtClear(ctl);
}
//this.txtBillNo.Text = par;//147
}
private void txtClear(Control ctls)
{
if (ctls.HasControls())
{
foreach (Control ctl in ctls.Controls)
{
txtClear(ctl);
}
}
else
{
if (ctls.GetType().Name == "TextBox")
{
TextBox tb = new TextBox();
tb = (TextBox)this.FindControl(ctls.ID);
//这里是清空所有的值，你想赋什么值直接改tx.Text即可.
tb.Text = "";
}
//else if (ctls.GetType().Name == "DropDownList")
//{
//    DropDownList ddl = new DropDownList();
//    ddl = (DropDownList)this.FindControl(ctls.ID);
//    ddl.SelectedIndex = 1;
//}
}
}