后台查找页面上所有的TextBox控件

 

      foreach (Control txtobj in this.Page.Controls)
        {
   
            if (txtobj.GetType().Name == "TextBox")
            {
   
                //((TextBox)txtobj).Text = ""; 
                TextBox tb = new TextBox();
                tb = (TextBox)this.FindControl(txtobj.ID);
                tb.Text = "";
            }
        }