public int Delete <T>(object id) where T : class, new()
{
OrmMap map = mappingPool[typeof(T)];
string whereStatement = String.Format("{0}=@id", map.ID);
string deleteQuery = map.BuildDeleteQuery(whereStatement);
using (DbConnection connection = GetOpenConnection())
{
DbCommand command = connection.CreateCommand();
command.CommandText = deleteQuery;
DbParameter param = command.CreateParameter();
param.DbType = map.GetDbType(map.ID);
param.ParameterName = "@id";
param.Value = id;
command.Parameters.Add(param);
return(command.ExecuteNonQuery());
}
}
public int Insert(object o)
{
Type type = o.GetType();
OrmMap map = mappingPool[type];
StringBuilder argListBuilder = new StringBuilder();
List <KeyValuePair <string, string> > colNameToNamedParam = new List <KeyValuePair <string, string> >();
foreach (string col in map.Columns)
{
string namedParam = '@' + col;
colNameToNamedParam.Add(new KeyValuePair <string, string>(col, namedParam));
argListBuilder.Append(namedParam);
argListBuilder.Append(',');
}
argListBuilder.Remove(argListBuilder.Length - 1, 1);
string insertQuery = map.BuildInsertQuery(argListBuilder.ToString());
using (DbConnection connection = GetOpenConnection())
{
DbCommand command = connection.CreateCommand();
command.CommandText = insertQuery;
foreach (var pair in colNameToNamedParam)
{
DbParameter param = command.CreateParameter();
param.DbType = map.GetDbType(pair.Key);
param.ParameterName = pair.Value;
param.Value = map[pair.Key].GetValue(o) ?? DBNull.Value;
command.Parameters.Add(param);
}
try
{
return(command.ExecuteNonQuery());
}
catch (Exception e)
{
return(0);
}
}
}
public T SelectById <T>(object id) where T : class, new()
{
OrmMap map = mappingPool[typeof(T)];
string whereStatement = String.Format("{0}=@id", map.ID);
string selectQuery = map.BuildSelectWhereQuery(whereStatement);
using (DbConnection connection = GetOpenConnection())
{
DbCommand command = connection.CreateCommand();
command.CommandText = selectQuery;
DbParameter param = command.CreateParameter();
param.DbType = map.GetDbType(map.ID);
param.ParameterName = "@id";
param.Value = id;
command.Parameters.Add(param);
DbDataReader reader = command.ExecuteReader();
DbReaderAdapter adapter = new DbReaderAdapter(reader, map);
return(adapter.GetSingleResult <T>());
}
}
