c# - 如何在内存中创建一个文本文件并在其上写一些东西并在客户端中打开记事本并在其中打开该文件？

Question

我如何在内存中创建一个文本文件（Ram -> Save NoWhere）并在其上写一些东西并在客户端浏览器顶部打开记事本并在其中打开该文本文件并让用户自己保存它？-> 在后面的代码中

在未来提前感谢

最好的祝福

Answer 1

你不能那样做。
您所能做的就是将文件内容写入响应，并在标头中使用正确的MIME类型（例如“text/plain”），客户端浏览器将使用为提供的 MIME 类型配置的查看器打开文本数据。

<%@ Page language="vb" runat="server" explicit="true" strict="true" %>
2   <script language="vb" runat="server">
3   Sub Page_Load(Sender As Object, E As EventArgs)
4       Dim strRequest As String = Request.QueryString("file") '-- if something was passed to the file querystring
5       If strRequest <> "" Then 'get absolute path of the file
6           Dim path As String = Server.MapPath(strRequest) 'get file object as FileInfo
7           Dim file As System.IO.FileInfo = New System.IO.FileInfo(path) '-- if the file exists on the server
8           If file.Exists Then 'set appropriate headers
9               Response.Clear()
10              Response.AddHeader("Content-Disposition", "attachment; filename=" & file.Name) ' comment this line if needed
11              Response.AddHeader("Content-Length", file.Length.ToString())
12              Response.ContentType = "application/octet-stream" 'this is MIME type
13              Response.WriteFile(file.FullName)
14              Response.End 'if file does not exist
15          Else
16              Response.Write("This file does not exist.")
17          End If 'nothing in the URL as HTTP GET
18      Else
19          Response.Write("Please provide a file to download.")
20      End If
21  End Sub
22  </script>

http://www.xefteri.com/articles/show.cfm?id=8

这是稍微修改的c#示例代码

<%@ Page Title="Home Page" Language="C#" AutoEventWireup="true"%>
<script language="cs" runat="server">
    public void Page_Load(object sender, EventArgs e)
    {

        byte[] buffer;
        using (var memoryStream = new System.IO.MemoryStream())
        {
            buffer = Encoding.Default.GetBytes("Hello StackOverflow"); //Dummy data
            memoryStream.Write(buffer, 0, buffer.Length);
            Response.Clear();
            Response.AddHeader("Content-Disposition", "attachment; filename=hello.txt"); //This wil force browser to silently download file. you can comment this line to see difference
            Response.AddHeader("Content-Length", memoryStream.Length.ToString());
            Response.ContentType = "text/plain"; //This is MIME type
            memoryStream.WriteTo(Response.OutputStream);
        }
        Response.End();

    }
</script>