/// <summary>
/// Factory method to creates a new, empty sequential access file.
/// </summary>
public static SequentialFile Create(string filepath, int recordlength)
{
//create new instance
SequentialFile file = new SequentialFile();
//set file path & record length
file.FilePath = filepath;
file.RecordLength = recordlength;
//create file, init stream, reader & writer
file.fs = new FileStream(file.FilePath, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.None, file.RecordLength);
//write metadata to file header
file.WriteHeader();
//set isopen flag to true
file.IsOpen = true;
//return file to caller
return file;
}
/// <summary>
/// Factory method to open an existing sequential access file.
/// </summary>
public static SequentialFile Open(string filepath)
{
//create new instance
SequentialFile file = new SequentialFile();
//set file path
file.FilePath = filepath;
//read file header
file.ReadHeader();
//open file & init stream
file.fs = new FileStream(file.FilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.None, file.RecordLength);
//set isopen flag to true
file.IsOpen = true;
//return file to caller
return file;
}