从字节返回文件下载[] [英] Return file download from byte[]

问题描述

这code

 字符串XML = XmlHelper.ToXml（queryTemplate）;字节[] = xmlb StringHelper.GetBytes（XML）;VAR CD =新System.Net.Mime.ContentDisposition
{
    //例如foo.bak
    文件名=的String.Format（{0} _V {1}的.xml，queryModel.Name，queryModel.Version）    //总是提示用户下载，如果你想设置为true
    //浏览器试图显示文件内嵌
    内嵌=假，
};
Response.AppendHeader（内容处置，cd.ToString（））;
返回文件（xmlb，应用程序/ XML）;
 

原来的字符串编码不正确，它转换成字节后[]

所以，我需要立即把字符串转换成文件，这样

 的FileStream xfile =新的FileStream（Path.Combine（dldir，文件名），FileMode.Create，System.IO.FileAccess.Write）;
hssfwb.Write（xfile）;
 

但我并不想这样做，我并不需要的文件下载后。我只是需要将其返回到浏览器的文件下载，不希望有后处理文件删除它可以成为pretty忙碌的时候有很多的要求。

如何纠正从字符串的字符编码​​为byte []并将其正确返回到浏览器？

该getBytes函数看起来像这样

 公共静态的byte [] GetBytes会（字符串str）
    {
        字节[]字节=新的字节[str.Length *的sizeof（字符）];
        System.Buffer.BlockCopy（str.ToCharArray（），0，字节，0，bytes.Length）;
        返回字节;
    }
 

解决方案

我有这个答案，原来的问题是字符编码。

解决方案链接低于

<一个href=\"http://stackoverflow.com/questions/14181866/converting-string-to-byte-creates-zero-character\">Converting字符串为byte []创建零字符

This code

string xml = XmlHelper.ToXml(queryTemplate);

byte[] xmlb = StringHelper.GetBytes(xml);

var cd = new System.Net.Mime.ContentDisposition
{
    // for example foo.bak
    FileName = String.Format("{0}_v{1}.xml", queryModel.Name, queryModel.Version),

    // always prompt the user for downloading, set to true if you want
    // the browser to try to show the file inline
    Inline = false,
};
Response.AppendHeader("Content-Disposition", cd.ToString());
return File(xmlb, "application/xml");

Turns out the string encoding is incorrect after it's converted into byte[]

So I need to put the string immediately into file, like this

FileStream xfile = new FileStream(Path.Combine(dldir, filename), FileMode.Create, System.IO.FileAccess.Write);
hssfwb.Write(xfile);

But I don't want to do this, I don't need the file after the download. I just need to return it to browser as file download and don't want to have to deal with file deletion afterward which can become pretty hectic when there's a lot of request.

How to correct the character encoding from string to byte[] and correctly return it to browser?

The GetBytes function looks like this

    public static byte[] GetBytes(string str)
    {
        byte[] bytes = new byte[str.Length * sizeof(char)];
        System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
        return bytes;
    }

解决方案

I have had the answer for this, it turns out the problem was character encoding.

The solution link is below

Converting string to byte[] creates zero character

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