如何用foreach遍历页面上所有的TextBox，判断他们是否为空？

 
1.整个页面的判断
foreach(Control ctl in this.Controls[1].Controls)
{
 if(ctl.GetType().Name=="TextBox")
 {
    TextBox tb =new TextBox();
    tb=(TextBox)this.FindControl(ctl.ID);
    
    if(tb.Text==string.Empty)
    {
     Response.Write("");
     break;
    }
 }
}
2.指定formID里TextBox 判断
先找出你的Form的ID
protected HtmlForm yourformID;
foreach (object obj in yourformID.Controls)
{
     if (obj is TextBox)
     {
      TextBox tb = (TextBox)obj;
      if (tb.Text = string.Empty)
      {
     Response.Write(";")
      }
     }
}