c# - 如何在 aspx (c#) 中编写一个简单的服务器端脚本？

Question

我是一名 php 开发人员，我正在尝试将一些 php 脚本(重复脚本)转换为 aspx。我正在尝试制作一个简单的上传脚本，纯服务器端(带有单独的 html)。此脚本必须将文件保存在服务器中并停止。在此示例中，我无法声明函数。这是我不工作的脚本，我不知道为什么:

<%@ LANGUAGE ='C#' %>
<%
        string filePath = Server.MapPath(Request.QueryString["ax-file-path"]);
        string fileName = Request.QueryString["ax-file-name"];

        string allowExtstr  = Request.QueryString["ax-allow-ext"];
        string[] allowExt   = allowExtstr.Split('|');


        if (!System.IO.File.Exists(filePath) && filePath.Length > 0)
        {
            System.IO.Directory.CreateDirectory(filePath);
        }

        if (!System.IO.File.Exists(thumbPath) && thumbPath.Length > 0)
        {
            System.IO.Directory.CreateDirectory(thumbPath);
        }

        if(Request.Files.Count>0)
        {
            for (int i = 0; i < Request.Files.Count; ++i)
            {
                HttpPostedFile file = Request.Files[i];
                if(file.FileName!="")
                {
                    string fullPath = checkFilename(file.FileName, allowExt, filePath);
                    file.SaveAs(fullPath);
                    Response.Write(@"{""name"":"""+System.IO.Path.GetFileName(fullPath)+@""",""size"":""0"",""status"":""uploaded"",""info"":""File/chunk uploaded""}");
                }
            }
        }


        public string checkFilename(string filename, string[] allowExt, string filePath)
        {   
            string[] windowsReserved    = new string[] {"CON", "PRN", "AUX", "NUL","COM1", "COM2", "COM3", "COM4", "COM5", "COM6", "COM7", "COM8", "COM9",
                                    "LPT1", "LPT2", "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9"};    
            string[] badWinChars        = new string[] {"<", ">", ":", @"\", "/", "|", "?", "*"};

            for (int i = 0; i < badWinChars.Length; i++)
            {
                filename.Replace(badWinChars[i], "");        
            }
            string fileExt      = System.IO.Path.GetExtension(filename);
            string fileBase     = System.IO.Path.GetFileName(filename);

            //check if legal windows file name
            if(windowsReserved.Contains(fileBase))
            {
                Response.Write(@"{""name"":"""+fileBase+@""",""size"":""0"",""status"":""error"",""info"":""File name not allowed. Windows reserverd.""}");
                return "error";
            }

            //check if is allowed extension
            if(!allowExt.Contains(fileExt) && allowExt.Length>0)
            {
                Response.Write(@"{""name"":"""+fileBase+@""",""size"":""0"",""status"":""error"",""info"":""Extension "+fileExt+@" not allowed.""}");
                return "error";
            }

            string fullPath = filePath+fileBase;
            int c=0;
            while(System.IO.File.Exists(fullPath))
            {
                c++;
                fileBase= fileBase+"("+c+")."+fileExt;
                fullPath    = filePath+fileBase;
            }
            return fullPath;
        }
%>

和简单的 html 代码:

<form action="upload.aspx" method=post enctype=......>
<input type=file />
</form>

我应该如何以正确的方式编写这段代码？

编辑:我只是想要一些帮助。如果这不是编写 aspx c# 的良好形式，请告诉我该怎么做，而不是说我编写的 aspx 代码很差。我是一名 c#、php 开发人员，没有 aspx 方面的经验，这就是我问的原因

Answer 1

<%@ Page Language="C#">
<script runat="server">
   // your code
</script>

web form