Read binary file in C# from specific position

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Is it possible to read a large binary file from a particular position?

I don't want to read the file from the beginning because I can calculate the start position and the length of the stream I need.


        using (FileStream sr = File.OpenRead("someFile.dat"))
        {
            sr.Seek(100, SeekOrigin.Begin);
            int read = sr.ReadByte();
            //...
        }

Read binary file in C# from specific position, Read binary file in C# from specific position. Seek locates a position in a file. It allows data to be read from a binary file at a certain part. For example, we can read 20,000 bytes from any part of a file. Seek locates a position in a file. It allows data to be read from a binary file at a certain part. For example, we can read 20,000 bytes from any part of a file. This is useful for certain file formats—particularly binary ones. Example. To begin our tutorial, we use the Seek method.


According to @shenhengbin answord.

Use BinaryReader.BaseStream.Seek.

using (BinaryReader b = new BinaryReader(File.Open("perls.bin", FileMode.Open)))                                                     
{
    int pos = 50000;
    int required = 2000;

    // Seek to our required position.
    b.BaseStream.Seek(pos, SeekOrigin.Begin);

    // Read the next 2000 bytes.
    byte[] by = b.ReadBytes(required);
}

C# Seek File Examples: ReadBytes, Use BinaryReader and File.Open. Seek locates a position in a file. It allows data to be read from a binary file at a certain part. For  Reads, from the current stream, the same number of characters as the length of the provided buffer, writes them in the provided buffer, and advances the current position in accordance with the Encoding used and the specific character being read from the stream. Read (Byte [], Int32, Int32) Reads the specified number of bytes from the stream


Well if you know streams, why not using (File)Stream.Seek(...) ?

BinaryWriter.Seek(Int32, SeekOrigin) Method (System.IO), Sets the position within the current stream. C# Copy. public virtual long Seek (​int offset, System.IO.SeekOrigin origin); BinaryWriter bw = new BinaryWriter(fs, utf8); // write a series of bytes to the file, each time Read(rawbytes, 0, (int)fs. Read a binary file in C#. How to read a binary file in C# and .NET. The Read overloaded method is used to write primitive data types to a stream. The Write method can write a Boolean, Byte, Char, Decimal, Double, and Integer data types. The BinaryReader also provides data type specific methods such as ReadString, ReadInt32 and so on.


Of course it is possible.See this here.See the offset.you can read from the offset

BinaryReader.Read Method (System.IO), Reads the specified number of bytes from the stream, starting from a specified point C# Copy. using System; using System.IO; class BinaryRW { static void Main() BinaryReader does not restore the file position after an unsuccessful read. After all, I opened the FileStream using the FileShare.Read option, so there was no danger of the file’s length changing, but it appears as though the position and file length are not cached by the class, so every call to Position or Length results in another file system query.


FileStream.Seek(Int64, SeekOrigin) Method (System.IO), Sets the current position of this stream to the given value. Begin); // Read and verify the data. for(int i = 0; i < fileStream.Length from the end of file to the beginning of the file, by using the various SeekOrigin values with the Seek method. C# ReadChars(Int32) ReadChars(Int32) ReadChars(Int32) ReadChars(Int32) Reads the specified number of characters from the current stream, returns the data in a character array, and advances the current position in accordance with the Encoding used and the specific character being read from the stream.


BinaryReader Class (System.IO), Reads primitive data types as binary values in a specific encoding. demonstrates how to store and retrieve application settings in a file. C# Copy Exists(fileName)) { using (BinaryReader reader = new BinaryReader(File. read the next byte as a Boolean value and advance the current position in the stream by one byte. The BinaryReader and BinaryWriter classes are used for reading from and writing to a binary file. The BinaryReader Class. The BinaryReader class is used to read binary data from a file. A BinaryReader object is created by passing a FileStream object to its constructor.


Reading from and Writing into Binary files, The BinaryReader class is used to read binary data from a file. current position of the stream in accordance with the Encoding used and the specific character  Binary files have two features that distinguish them from text files: You can instantly use any structure in the file. You can change the contents of a structure anywhere in the file. After you have opened the binary file, you can read and write a structure or seek a specific position in the file.