浏览器关闭时调用页面方法

发布于 2024-07-26 11:27:36 字数 476 浏览 5 评论 0原文

您好，我正在尝试在 bodyunload 方法上调用 [webmethod]。

但它仅在页面加载本身时被触发。我该如何预防？

这是我正在使用的代码：

[WebMethod]
public static void AbandonSession()
{
    HttpContext.Current.Session.Abandon();
}


<script language="javascript" type="text/javascript">
//<![CDATA[

function HandleClose() {
    PageMethods.AbandonSession();
}

//]]>
</script>

<body onunload="HandleClose()">
....
....
....
</body>

谢谢，纳古

原文

Hi here I'm trying to call a [webmethod] on bodyunload method.

But it is getting fired on page load itself only. How do i prevent it?

Here's the code I am using:

[WebMethod]
public static void AbandonSession()
{
    HttpContext.Current.Session.Abandon();
}


<script language="javascript" type="text/javascript">
//<![CDATA[

function HandleClose() {
    PageMethods.AbandonSession();
}

//]]>
</script>

<body onunload="HandleClose()">
....
....
....
</body>

Thank you,
Nagu

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人海汹涌 2024-08-02 11:27:36

我已经用下面的代码进行了测试，它工作正常。

在 Aspx 页面中

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>

    <script type="text/javascript">
        //<![CDATA[

        function HandleClose()
        {


            PageMethods.AbandonSession();
        }

        //]]>    
    </script>

</head>
<body onunload="HandleClose()">
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
    </asp:ScriptManager>
    </form>
</body>
</html>

在代码隐藏中

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;

public partial class ClearSessionOnPageUnload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    [WebMethod]
    public static void AbandonSession()
    {
        HttpContext.Current.Session.Abandon();
    }

}

您可以在 AbandonSession 方法处放置断点，以验证它在卸载时是否受到命中。

I have tested with below code and it is working fine.

In Aspx page

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>

    <script type="text/javascript">
        //<![CDATA[

        function HandleClose()
        {


            PageMethods.AbandonSession();
        }

        //]]>    
    </script>

</head>
<body onunload="HandleClose()">
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
    </asp:ScriptManager>
    </form>
</body>
</html>

In Codebehind

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;

public partial class ClearSessionOnPageUnload : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    [WebMethod]
    public static void AbandonSession()
    {
        HttpContext.Current.Session.Abandon();
    }

}

You can put breakpoint at AbandonSession method to verify that it is getting hit at unload.

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