如何在javascript之前调用代码

本文介绍了如何在javascript之前调用代码的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我有2页 第1页包含一个asp按钮，它应该调用函数后面的代码然后打开page2作为弹出窗口 on page2还有一个asp按钮应该从自己的代码后面调用一个函数而另一个函数从page1代码后面然后关闭弹出窗口 换句话说：我需要传输数据来自page1到page2，并在关闭之前准备page2中的另一个数据，并通知page1关于关闭以接收数据 注意：我想在没有用户权限的情况下执行此操作，所以从代码注册脚本？不是我要找的！ 我用会话来传输数据 我尝试了什么： 我试图使用javascript调用隐形asp按钮点击事件 它适用于page1但是并不总是 page1使用母版页 page2 webform 在这段代码中，我使用了I have 2 pagespage 1 contains an asp button which should call a code behind function then open the page2 as a popup windowon page2 there is also an asp button which should call a function from its own code behind and another function from page1 code behind then close the popup windowin other words: I need to transfer data from page1 to page2, and prepare another data in page2 before closing and inform page1 about closing to receive the datanote: I want to do this without user permission for the popup, so registering scripts from code behind? not what I am looking for!"I use sessions to transfer data"What I have tried:I tried to call an invisible asp buttons click event using javascriptIt works in page1 but not always"page1 using master page""page2 webform"At this code I used document.getElementById('ContentPlaceHolder1_HiddenButton').click();在打开弹出窗口之前创建数据会话。并使用 in page1 to create the data session before opening the popup. and used document.getElementById('HiddenButton').click();在第2页中准备另一个数据会话以便返回。还使用了 in page2 to prepare another data session for return. also used opener.document.getElementById('ContentPlaceHolder1_HiddenButton1').click();告知第1页关于新数据会话和弹出结束的信息。 in page2 to inform page1 about new data session and popup closing.<script type="text/jscript"> function OpenPopup() { document.getElementById('ContentPlaceHolder1_HiddenButton').click(); window.open("WebForm1.aspx", "List", "scrollbars=yes,resizable=no,width=1000,height=600"); return false; } </script> <asp:Button ID="HiddenButton1" runat="server" Text="Button" style="display:none" OnClick="HiddenButton1_Click"/> <asp:Button ID="HiddenButton" runat="server" Text="Button" style="display:none"OnClick="HiddenButton_Click"/><asp:Button ID="btnOffer" runat="server" Text="Add Offer" onclientclick="javascript:return OpenPopup();"/> <script type="text/javascript"> function returnValues() { document.getElementById('HiddenButton').click(); opener.document.getElementById('ContentPlaceHolder1_HiddenButton1').click(); window.close(); } </script> <asp:Button ID="HiddenButton" runat="server" Text="Button" style="display:none" OnClick="HiddenButton_Click"/><asp:Button ID="btnFinish" runat="server" OnClientClick="javascript:return returnValues()" Text="finish and close" /> 推荐答案 我刚刚在父页面（page1）上创建了一个函数，如下所示： I just created a function on parent page(page1) as below:function InformedFromPage2() { alert('from page2'); } 在第2页，我调用了以下函数： And on page 2 I called the function as followed:function returnValues() { opener.InformedFromPage2(); document.getElementById('HiddenButton').click(); opener.document.getElementById('HiddenButton1').click(); window.close(); } 为什么不学习和使用AJAX来调用服务器方法。这样你就不会处理回调，这可能会让你在与JavaScript逻辑混合时感到痛苦。这是一个可以帮助您入门的快速参考：使用jQuery AJAX和ASP.NET与数据库进行通信的许多方法 [ ^ ] why not learn and use AJAX to invoke server methods. That way you won't be dealing with postbacks which could cause you pain when mixing with JavaScript logic. Here's a quick reference that may help you get started: Many ways to communicate with your database using jQuery AJAX and ASP.NET[^] 这篇关于如何在javascript之前调用代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！