如何将数据附加到二进制文件？

I have a binary file to which I want to append a chunk of data at the end of the file, how can I achieve this using C# and .net? also are there any considerations to take when writing to the end of a binary file? thanks a lot for your help.

我有一个二进制文件，我想在文件的末尾添加一大块数据，我怎样才能使用C＃和.net实现这一点？在写入二进制文件的末尾时还有什么需要考虑的事项吗？非常感谢你的帮助。

3 个解决方案

#1

private static void AppendData(string filename, int intData, string stringData, byte[] lotsOfData)
{
    using (var fileStream = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.None))
    using (var bw = new BinaryWriter(fileStream))
    {
        bw.Write(intData);
        bw.Write(stringData);
        bw.Write(lotsOfData);
    }
}

#2

You should be able to do this via the Stream:

您应该可以通过Stream执行此操作：

using (FileStream data = new FileStream(path, FileMode.Append))
{
    data.Write(...);
}

As for considerations - the main one would be: does the underlying data format support append? Many don't, unless it is your own raw data, or text etc. A well-formed xml document doesn't support append (without considering the final end-element), for example. Nor will something like a Word document. Some do, however. So; is your data OK with this...

至于考虑因素 - 主要的是：基础数据格式支持是否附加？除非它是您自己的原始数据或文本等，否则很多都不会。例如，格式良好的XML文档不支持追加（不考虑最终的结束元素）。也不会像Word文档那样。但有些人会这样做。所以;这是你的数据好......

#3

Using StreamWriter and referencing DotNetPerls, make sure to add the True boolean to the StreamWriter constructor, if otherwise left blank, it'll overwrite as usual:

使用StreamWriter并引用DotNetPerls，确保将True布尔值添加到StreamWriter构造函数中，如果另外留空，它将像往常一样覆盖：

using System.IO;

class Program
{
    static void Main()
    {
    // 1: Write single line to new file
    using (StreamWriter writer = new StreamWriter("C:\\log.txt", true))
    {
        writer.WriteLine("Important data line 1");
    }
    // 2: Append line to the file
    using (StreamWriter writer = new StreamWriter("C:\\log.txt", true))
    {
        writer.WriteLine("Line 2");
    }
    }
}

Output
    (File "log.txt" contains these lines.)

Important data line 1
Line 2

This is the solution that I was actually looking for when I got here from Google, although it wasn't a binary file though, hope it helps someone else.

这是我从谷歌来到这里时实际寻找的解决方案，虽然它不是二进制文件，但希望它可以帮助其他人。

#1

private static void AppendData(string filename, int intData, string stringData, byte[] lotsOfData)
{
    using (var fileStream = new FileStream(filename, FileMode.Append, FileAccess.Write, FileShare.None))
    using (var bw = new BinaryWriter(fileStream))
    {
        bw.Write(intData);
        bw.Write(stringData);
        bw.Write(lotsOfData);
    }
}

#2