.net如何从后台获取repeater中的控件值

repeater OnItemCommand 事件中
TextBox txt = (TextBox)e.Item.FindControl("repeater中控件名称");
然后执行数据库更新操作,更新数据

foreach (RepeaterItem item in Repeater1.Items)
        {
            TextBox txtNiName = (TextBox)item.FindControl("txtNiName");
            string name=txtNiName.text;
         ｝