如何將全局字符串變量從ASP.NET頁后面的C＃代碼傳遞到經典ASP頁？

Question

所有人，我正在為通過電子郵件請求工單的網站維護一些舊的.ASP代碼。 該站點正常工作，直到最近將其遷移到IIS 7.5服務器為止。 我必須重新編碼在ASP.NET中執行文件上傳的部分，后面帶有C＃代碼，並且無法使String從新傳遞到舊。

以前，.ASP代碼使用ASPupload組件，出於可靠的原因，新的托管服務器不再支持該組件。 ASPupload用於將兩個上傳的文件名（通過JavaScript作為隱藏輸入值）傳遞到.ASP代碼的一部分，該部分將這些文件名用作字符串（加上它已經具有的路徑String）。 然后，.ASP代碼將文件附加到發送給履行工作訂單的公司的電子郵件中。

我想使用新的C＃全局字符串變量並將其傳遞給執行電子郵件發送的舊.ASP代碼，因為它仍然像一種魅力一樣工作。

我在這個問題上改進了Behind Code和ASP.NET，以反映Manoj Kumar Sharma出色的JavaScript，該JavaScript將C＃全局字符串變量作為JavaScript變量發送到ASP.NET代碼，而我最初遇到了麻煩。 謝謝！！！ 現在我們需要彌合新的ASP.NET代碼和舊的.ASP代碼之間的鴻溝。

這是C＃代碼背后的內容（感謝Mason所做的編輯，現在更容易更新此帖子）：

// From https://support.microsoft.com/en-us/kb/323246
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace CSharpUpload
{
    /// <summary>
    /// Browse to two files, upload to path on Server. Check if files haven't been downloaded, pass name.
    /// </summary>

    public class Scott_upload : System.Web.UI.Page
    {
        protected System.Web.UI.HtmlControls.HtmlInputFile File_Upload_1;
        protected System.Web.UI.HtmlControls.HtmlInputFile File_Upload_2;
        protected System.Web.UI.HtmlControls.HtmlInputButton Submit_Upload;

        public string UpFileName1 { get; set; }
        public string UpFileName2 { get; set; }
        public int File_Count;

        public bool Dont_show_buttons;

        private void Page_Load(object sender, System.EventArgs e)
        {
            // Put user code to initialize the page here

        }

        #region Web Form Designer generated code
        override protected void OnInit(EventArgs e)
        {
            // 
            // CODEGEN: This call is required by the ASP.NET Web Form Designer.
            // 
            InitializeComponent();
            base.OnInit(e);
        }

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {    
            this.Submit_Upload.ServerClick += new System.EventHandler(this.Submit_Upload_ServerClick);
            this.Load += new System.EventHandler(this.Page_Load);
        }
        #endregion

        private void Submit_Upload_ServerClick(object sender, System.EventArgs e)
        {
            bool no_file_selected = true;

            File_Count = 0;

            if( ( File_Upload_1.PostedFile != null ) && ( File_Upload_1.PostedFile.ContentLength > 0 ) )
            {
                string fn_1 = System.IO.Path.GetFileName(File_Upload_1.PostedFile.FileName);
                string server_path_string_1 = @"Data\";
                string SaveLocation_1 = Server.MapPath(server_path_string_1) + fn_1;
                try
                {
                    File_Upload_1.PostedFile.SaveAs(SaveLocation_1);
                    this.UpFileName1 = fn_1;
                    File_Count = File_Count + 1;
                    Dont_show_buttons = true;
                    no_file_selected = false;

                    Response.Write("\nUpload Document 1 \"");
                    Response.Write(fn_1);
                    Response.Write("\" has been SUCCESSFULLY uploaded!\n");
                }
                catch ( Exception ex )
                {
                    Response.Write("Error: " + ex.Message);
                    //Note: Exception.Message returns a detailed message that describes the current exception. 
                    //For security reasons, we do not recommend that you return Exception.Message to end users in 
                    //production environments. It would be better to return a generic error message. 
                }
            }

            if( ( File_Upload_2.PostedFile != null ) && ( File_Upload_2.PostedFile.ContentLength > 0 ) )
            {
                string fn_2 = System.IO.Path.GetFileName(File_Upload_2.PostedFile.FileName);
                string server_path_string_2 = @"Data\";
                string SaveLocation_2 = Server.MapPath(server_path_string_2) + fn_2;
                try
                {
                    File_Upload_2.PostedFile.SaveAs(SaveLocation_2);
                    this.UpFileName2 = fn_2;
                    File_Count = File_Count + 1;
                    Dont_show_buttons = true;
                    no_file_selected = false;

                    Response.Write("\nUpload Document 2 \"");
                    Response.Write(fn_2);
                    Response.Write("\" has been SUCCESSFULLY uploaded!\n");
                }
                catch ( Exception ex )
                {
                    Response.Write("Error: " + ex.Message);
                    //Note: Exception.Message returns a detailed message that describes the current exception. 
                    //For security reasons, we do not recommend that you return Exception.Message to end users in 
                    //production environments. It would be better to return a generic error message. 
                }
            }

            if (no_file_selected)
            {
                Response.Write("\nPLEASE SELECT A FILE TO UPLOAD\n");
            }
        }
    }
}

。 這是新的ASP.NET，可以將文件名視為“ upFileName1”和“ upFileName2”：

<%@ Page language="c#" src="Scott_upload.aspx.cs" AutoEventWireup="false" Inherits="CSharpUpload.Scott_upload"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>
  <HEAD>
    <title>Scott_upload</title>
    <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0">
    <meta name="CODE_LANGUAGE" Content="C#">
    <meta name=vs_defaultClientScript content="JavaScript">
    <meta name=vs_targetSchema content="http://schemas.microsoft.com/intellisense/ie5">
  </HEAD>
  <body MS_POSITIONING="GridLayout">

        <form id="Scott_file_upload" method="post" enctype="multipart/form-data" runat="server">

            <% if (Dont_show_buttons == false) { %>
                <div>
                    Schedule A&B are required to complete the survey within 3 days.
                    <br><br>
                    Upload Document 1 <INPUT type=file id=File_Upload_1 name=File_Upload_1 runat="server" />
                    <br>
                </div>
                <div>
                    <br>
                    Upload Document 2 <INPUT type=file id=File_Upload_2 name=File_Upload_2 runat="server" />
                    <br>
                </div>
                <div>
                    <br><br>
                    <input type="submit" id="Submit_Upload" value="Click To Upload File(s)" NAME="Submit_Upload" runat="server" />
                    <br>
                </div>
            <% } %>
            <% else { %>
                <div>
                    <br><br>
                    Upload(s) COMPLETE.
                    <br>
                </div>
            <% } %>
        </form>

<script type="text/javascript">

    var upFileName1 = '<%= this.UpFileName1 %>';
    var upFileName2 = '<%= this.UpFileName2 %>';

    ' The code behind filenames are now appearing in the ASP.NET
    document.write(upFileName1);
    document.write(upFileName2);

</script>

</body>
</HTML>

現在，第三個請求的部分是舊的.ASP代碼。 請原諒，我沒有寫它，但是必須維護它（我對變量名更加具體）。 首先是一個從訂單請求表單內的iframe調用“ Scott_upload.aspx”的部分（請注意ASPupload過去使用的舊的隱藏輸入“ UploadedFile”）：

<html>
<!-- ... -->
<body>
<!-- ... -->
<table class="tblw" border="0" cellpadding="0" cellspacing="0" align="center" ID="Table5">
<tr>
<form name="frmRequest" method="post" action="format_email.asp">
<!-- ... -->
    <table class="tblw" border="0" cellpadding="0" cellspacing="0" align="center" ID="Table13">
    <tr>
        <input type="hidden" name="UploadedFile1" value="" ID="UploadedFile1id">
        <input type="hidden" name="UploadedFile2" value="" ID="UploadedFile2id">
        <td class="container" align="center">
            <iframe src="Scott_upload.aspx" width=520 height=140 name="upload" scrolling="yes" scrollbars="yes" frameborder="0" border="0" style="border:0px;padding:0px;margin:0px;overflow:visible;">
            </iframe>
        </td>
    </tr>
    </table>
<!-- ... -->
    <input type="button" name="btn" value="REQUEST ORDER" class="submitbtn" onClick="validateForm();">
</tr>
</form>
</table>

<% Server.Execute %>

</body>
</html>

現在，別人寫的舊的上載代碼對隱藏的輸入值（在另一個iframe中，在另一個表單IKR中！）進行了JavaScript操作，這在我的.ASPX中不起作用：

<script language="javascript">

<% If Count = 1 Or Count = 2 Then %>
window.parent.document.getElementById("UploadedFile1id").value = document.frmUpload.FileName1.value;
<% End If %>

<% If Count = 2 Then %>
window.parent.document.getElementById("UploadedFile2id").value = document.frmUpload.FileName2.value;
<% End If %>

</script>

然后在“ format_email.asp”文件名字符串中分配以下行：

strUpload1 = Trim(Request.Form("UploadedFile1"))
strUpload2 = Trim(Request.Form("UploadedFile2"))

如何從“ Scott_upload.aspx”頁面獲取“ upFileName1”和“ upFileName2”，以在舊的“ format_email.asp”頁面中分配給“ strUpload1”和“ strUpload2”？

Answer 1

您可以嘗試以下方法：

將兩個變量聲明為“頁面的屬性”（類似這樣）：

public class Scott_upload : System.Web.UI.Page
{
    public string UpFileName1 { get; set; }
    public string UpFileName2 { get; set; }
...

然后在擁有您的Javascript代碼的.ASPX頁面中，將值嵌入到javascript變量中（類似這樣）：

<script type="text/javascript">

    var upFileName1 = '<%= this.UpFileName1 %>';
    var upFileName2 = '<%= this.UpFileName2 %>';

</script>

希望這可以幫助。