public DataModel.Media AddMedia(DataModel.Media newMedia)
{
string addQuery;
if (newMedia.File == null)
{
addQuery = "INSERT INTO Song (Title, Singer) VALUES ('" + newMedia.Title + "', '" + ((Song)newMedia).Singer + "');"
+ " SELECT CAST(scope_identity() AS int);";
}
else
{
addQuery = "INSERT INTO Song (Title, Singer, File) VALUES ('" + newMedia.Title + "', '" + ((Song)newMedia).Singer + "', '"
+ "0x" + BitConverter.ToString(newMedia.File).Replace("-", "") + "');"
+ " SELECT CAST(scope_identity() AS int);";
}
try
{
using (SqlConnection cn = MediaDB.GetConnection())
{
using (SqlCommand cmd = new SqlCommand(addQuery, cn))
{
cn.Open();
newMedia.Id = (int)cmd.ExecuteScalar();
}
}
}
catch (SqlException)
{
throw new SaveMediaFailedException();
}
return(newMedia);
}
public bool UpdateMedia(DataModel.Media updateMedia)
{
int updateCount = 0;
string updateQuery;
if (updateMedia.File == null)
{
updateQuery = "UPDATE Song SET Title = '" + updateMedia.Title + "', Singer = '" + ((Song)updateMedia).Singer + "' WHERE Id = " + updateMedia.Id;
}
else
{
updateQuery = "UPDATE Song SET Title = '" + updateMedia.Title + "', Singer = '" + ((Song)updateMedia).Singer + "', File = '"
+ "0x" + BitConverter.ToString(updateMedia.File).Replace("-", "")
+ "' WHERE Id = " + updateMedia.Id;
}
try
{
using (SqlConnection cn = MediaDB.GetConnection())
{
using (SqlCommand cmd = new SqlCommand(updateQuery, cn))
{
cn.Open();
updateCount = cmd.ExecuteNonQuery();
}
}
}
catch (SqlException)
{
throw new UpdateMediaFailedException();
}
return(updateCount > 0);
}
public bool DeleteMedia(DataModel.Media oldMedia)
{
int deleteCount = 0;
string deleteQuery = "DELETE FROM Song WHERE Id = " + oldMedia.Id;
try
{
using (SqlConnection cn = MediaDB.GetConnection())
{
using (SqlCommand cmd = new SqlCommand(deleteQuery, cn))
{
cn.Open();
deleteCount = cmd.ExecuteNonQuery();
}
}
}
catch (SqlException)
{
throw new RemoveMediaFailedException();
}
return(deleteCount > 0);
}
public byte[] GetMediaFile(int songId)
{
byte[] musicFile = null;
string SqlStatement = "SELECT File FROM Song WHERE Id = @songId";
try
{
using (SqlConnection cn = MediaDB.GetConnection())
{
using (SqlCommand cmd = new SqlCommand(SqlStatement, cn))
{
cmd.Parameters.AddWithValue("@songId", songId);
cn.Open();
musicFile = (byte [])cmd.ExecuteScalar();
}
}
}
catch (SqlException e)
{
throw new MediaReadFailedException(e);
}
return(musicFile);
}
public ObservableCollection <DataModel.Media> GetAllMedia()
{
ObservableCollection <DataModel.Media> songs = new ObservableCollection <DataModel.Media>();
string SqlStatement = "SELECT Id, Title, Singer FROM Song";
try {
using (SqlConnection cn = MediaDB.GetConnection())
{
using (SqlCommand cmd = new SqlCommand(SqlStatement, cn))
{
cn.Open();
using (SqlDataReader dr = cmd.ExecuteReader())
{
int idPos = dr.GetOrdinal("Id");
int titlePos = dr.GetOrdinal("Title");
int singerPos = dr.GetOrdinal("Singer");
Song song;
while (dr.Read())
{
song = new Song
{
Id = (int)dr[idPos],
Title = dr[titlePos].ToString(),
Singer = dr[singerPos].ToString()
};
songs.Add(song);
}
}
}
}
}
catch (SqlException e)
{
throw new MediaReadFailedException(e);
}
return(songs);
}
