/// <summary>
/// Modifies the ID of EMeter in Database.
/// </summary>
/// <param name="newID"> New value of ID field. </param>
/// <param name="eMeterOld"> EMeter object read from DB. </param>
public static void WriteModified(int newID, EMeter eMeterOld)
{
string destination = @"C:\Users\stefan\Desktop\blok22\db_tmp.txt";
string line = null;
using (var reader = new StreamReader(_dbPath))
using (var writer = new StreamWriter(destination))
{
while ((line = reader.ReadLine()) != null)
{
var lineContent = line.Split(' ');
int currentReading = Int32.Parse(lineContent[0]);
if (currentReading == eMeterOld.ID)
{
// Modify the eMeterOld and write to file.
eMeterOld.ID = newID;
writer.WriteLine(eMeterOld.ToString());
}
else
{
writer.WriteLine(line);
}
}
}
// Delete old db.txt and create new.
File.Delete(_dbPath);
File.Move(destination, _dbPath);
}
/// <summary>
/// Write EMeter to DB.
/// </summary>
/// <param name="eMeter"> EMeter object to be written to DB. </param>
public static void Write(EMeter eMeter)
{
// Check if EMeter with same ID already exists.
if (Read(eMeter.ID) != null)
{
throw new Exception("EMeter with ID = " + eMeter.ID + " already exists.");
}
using (var writer = new StreamWriter(_dbPath, true))
{
writer.WriteLine(eMeter.ToString());
}
}
