Page.ClientScript是否可用于class.cs？

Question

我有一个class.cs文件,如下所示,但我的"Page.ClientScript"有一个错误,它说"非静态字段,方法或属性需要一个对象引用"System.Web.UI.Page .ClientScript.get'".所以我想知道page.clientscript是不是可以在class.cs中使用？使用任何其他方法而不是page.clientscript？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.Security;
using System.Data;
using System.Web.Script.Services;


public class SessionExpired
{

    public SessionExpired()
    {
        string csname = "timeoutWarning";
        Type cstype = this.GetType();
        if (!Page.ClientScript.IsStartupScriptRegistered(cstype, csname))
        {
             string strconfirm = "<script>" +
                "window.setTimeout('SessionTimeOutHandler()', 60000);" +
                "function SessionTimeOutHandler() { " +
                "alert('Your login session is expired');" +
                "window.location='../Processing.aspx';" +
                "}</script>";
            Page.ClientScript.RegisterStartupScript(cstype, csname, strconfirm, false);
        }

    }
}

Answer 1

您遇到了问题,因为它看起来像是在使用不是派生自的类System.Web.UI.Page.但是,只要您有权访问HttpContext,您只需说:

using System.Web;
using System.Web.UI;

...

var page = HttpContext.Current.CurrentHandler as Page;

if( page == null ){
     // throw an exception, something bad happened
}

// now you have access to the current page...
page.ClientScript.RegisterStartupScript();