C#

public byte[] ReadFile(string filePath)
        {
            byte[] buffer;
            FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            try
            {
                int length = (int)fileStream.Length;  // get file length
                buffer = new byte[length];            // create buffer
                int count;                            // actual number of bytes read
                int sum = 0;                          // total number of bytes read

                // read until Read method returns 0 (end of the stream has been reached)
                while ((count = fileStream.Read(buffer, sum, length - sum)) > 0)
                    sum += count;  // sum is a buffer offset for next reading
            }
            finally
            {
                fileStream.Close();
            }
            return buffer;
        }

grmihel2 wrote:

when I store it as .txt there is just binary numbers.

public void DownloadFile(string filSti, StoredFile fil)
{
    byte[] file = WriteFile(filSti, fil);
    BinaryWriter bw = new BinaryWriter(File.Open(@"d:\temp\doctest.docx", FileMode.OpenOrCreate));
    bw.Write(file);
    bw.Close();
}

grmihel2 wrote:

had no clue where to start

byte[] file = WriteFile(filSti, fil);

public byte[] WriteFile(string filePath, StoredFile file)
{
	byte[] buffer = file.FilContent.ToArray();
        FileStream fileStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite);
        try
        {
        	int length = (int)fileStream.Length;  // get file length
                buffer = new byte[length];            // create buffer
                int count;                            // actual number of bytes read
                int sum = 0;                          // total number of bytes read

                // read until Read method returns 0 (end of the stream has been reached)
                while ((count = fileStream.Read(buffer, sum, length - sum)) > 0)
                    sum += count;  // sum is a buffer offset for next reading
        }
        finally
        {
	        fileStream.Close();
        }

        return buffer;
}

public void WriteFile(string filePath, StoredFile file)
{
    byte[] data = file.FilContent.ToArray();
    FileStream fileStream = new FileStream(@"d:\temp\doctest.docx", FileMode.OpenOrCreate, FileAccess.ReadWrite);
    try
    {
        int length = (int)data.Length;
        int buffer = 1000;

        fileStream.SetLength(length);
        fileStream.Seek(length - buffer, SeekOrigin.Begin);
        fileStream.Write(data, 0, buffer);
        fileStream.Flush();
    }
    finally
    {
        fileStream.Close();
    }
}

                int length = (int)data.Length;
                int buffer = 1000;  // what is this for?

                fileStream.SetLength(length);  // what is this for?
                fileStream.Seek(length - buffer, SeekOrigin.Begin);  // what is this for?
//                 fileStream.Write(data, 0, buffer);
// instead do
                fileStream.Write(data, 0, data.Length);
                fileStream.Flush();