[英]How to read a binary file using c#?
I have got a binary file. 我有一个二进制文件。 I have no clue how to read this binary file using C#.
我不知道如何使用C#读取这个二进制文件。
The definition of the records in the binary file as described in C++ is: C ++中描述的二进制文件中记录的定义是:
#define SIZEOF_FILE(10*1024)
//Size of 1234.dat file is: 10480 + 32 byte (32 = size of file header)
typedef struct FileRecord
{
WCHAR ID[56];
WCHAR Name[56];
int Gender;
float Height;
WCHAR Telephne[56];
and........
}
How do I read a binary file containing those records in C# and write it back after editing it? 如何在C#中读取包含这些记录的二进制文件,并在编辑后将其写回?
There's actually a nicer way of doing this using a struct
type and StructLayout
which directly maps to the structure of the data in the binary file (I haven't tested the actual mappings, but it's a matter of looking it up and checking what you get back from reading the file): 实际上有一种更好的方法是使用
struct
类型和StructLayout
直接映射到二进制文件中的数据结构(我没有测试过实际的映射,但这是一个查找并检查你得到的内容的问题从阅读文件回来):
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode, Pack = 1)]
public struct FileRecord
{
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 56)]
public char[] ID;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = 56)]
public char[] Name;
public int Gender;
public float height;
//...
}
class Program
{
protected static T ReadStruct<T>(Stream stream)
{
byte[] buffer = new byte[Marshal.SizeOf(typeof(T))];
stream.Read(buffer, 0, Marshal.SizeOf(typeof(T)));
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
T typedStruct = (T)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(T));
handle.Free();
return typedStruct;
}
static void Main(string[] args)
{
using (Stream stream = new FileStream(@"test.bin", FileMode.Open, FileAccess.Read))
{
FileRecord fileRecord = ReadStruct<FileRecord>(stream);
}
}
See the sample below. 请参阅下面的示例。
public byte[] ReadByteArrayFromFile(string fileName)
{
byte[] buff = null;
FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
long numBytes = new FileInfo(fileName).Length;
buff = br.ReadBytes((int)numBytes);
return buff;
}
Hope that helps... 希望有帮助......
您可以使用FileStream来读取文件 - 使用File.Open
方法打开文件并获取FileStream
- 查看此处了解更多详细信息
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