如何在asp.net中验证Recaptcha
问题描述：
我无法验证重新输入验证码的文字.
我首先在更新面板中使用了recaptacha，但是它在部分回发时消失了，所以我将其移到了更新面板的外部.
我虽然使用page.isvalid属性，但是即使我在recaptcha中写错或将其留空，页面也仍然有效.我应该如何用图片验证recaptcha的文本.
需要帮助
谢谢
Hi ,
im unable to validate recaptcha text.
I first used recaptacha inside update panel but it disappears on partial postback so i moved it outside to update panel.
I am using page.isvalid property although but page become valid even i write wrong in recaptcha or leave it empty. How should i validate the text of recaptcha with the picture.
need help
Thanks