我们在ASP.NET项目中使用了reCAPTCHA,并将ascx的验证码发送到页面后面的代码(服务器端),没有任何问题。但是,在2018年3月之后,我们不得不将验证码更新为v2并进行以下更改:
用户控制(cs):
....
protected Recaptcha.Web.UI.Controls.Recaptcha Captcha;
protected override Recaptcha.Web.UI.Controls.Recaptcha ReCaptcha
{ get { return this.Captcha; } }
protected void btnSend_Click(object sender, EventArgs e)
{
if (this.Submit(sender))
this.mvMain.ActiveViewIndex++;
}
reCAPTCHA v1(ascx): 在此版本中,网站密钥在web.config中定义。
<%@ Control Language="C#" AutoEventWireup="true" Inherits="Tools.WebUI._ContactForm"%>
<%@ Register Assembly="Recaptcha.Web" Namespace="Recaptcha.Web.UI.Controls" TagPrefix="cc1"%>
<asp:MultiView ID="mvMain" ActiveViewIndex="0" runat="server">
<asp:View runat="server">
<div id="divCaptcha">
<!-- code omitted for brevity -->
<div id="captcha">
<cc1:Recaptcha ID="Captcha" Theme="Clean" runat="server" />
</div>
<asp:TextBox ID="txtBotCheck" style="display:none !important" runat="server" />
<asp:Button ID="btnSend" runat="server" OnClick="btnSend_Click" />
<asp:Label ID="lblMessage" runat="server" CssClass="captchaMessage"></asp:Label>
</div>
</asp:View>
<asp:View runat="server">
Message was sent...
</asp:View>
</asp:MultiView>
reCAPTCHA v2(ascx):
<%@ Control Language="C#" AutoEventWireup="true" Inherits="Crema.Tools.WebUI._ContactForm"%>
<%@ Register Assembly="Recaptcha.Web" Namespace="Recaptcha.Web.UI.Controls" TagPrefix="cc1"%>
<asp:MultiView ID="mvMain" ActiveViewIndex="0" runat="server">
<asp:View runat="server">
<script src="http://www.google.com/recaptcha/api.js" async defer></script>
<div id="divCaptcha">
<!-- code omitted for brevity -->
<div id="captcha">
<div class="g-recaptcha" data-sitekey="tlcUAAACV...............FhQ"></div>
</div>
<asp:TextBox ID="txtBotCheck" style="display:none !important" runat="server" />
<asp:Button ID="btnSend" runat="server" OnClick="btnSend_Click" />
<asp:Label ID="lblMessage" runat="server" CssClass="captchaMessage"></asp:Label>
</div>
</asp:View>
<asp:View runat="server">
Message was sent...
</asp:View>
</asp:MultiView>
发送此表单时,我们遇到错误pge,相关日志中出现以下错误。另一方面,当我们查看Firebug网络时,我们观察到 g-recaptcha-response ,但是即使我们使用&#34; name&#34;属性名称为&#34;验证码&#34;。
例外信息:
异常类型:NullReferenceException 异常消息:未将对象引用设置为对象的实例。 在Tools.Domain.FormUserControl.Submit(对象发送者) 在Tools.WebUI._ContactForm.btnSend_Click(Object sender,EventArgs e) 在System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) 在System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint,Boolean includeStagesAfterAsyncPoint)
有什么想法吗?
答案 0 :(得分:1)
我按照这个很棒的教程在ASP.NET WebForms中实现了reCaptcha v2:
https://www.aspsnippets.com/Articles/Google-RECaptcha-Code-with-Example-in-ASPNet.aspx
P.S。:这家伙有很多优秀的技巧和文章,我不时检查。