/// <summary>
/// 往write表写入 传入实体类
/// </summary>
/// <param name="sql"></param>
public static int InsertBluetoothWrite(BluetoothWriteEntity bluetoothWriteEntity)
{
// 确保连接打开
Open(connection);
int result = 0;
using (var tr = connection.BeginTransaction())
{
using (var command = connection.CreateCommand())
{
StringBuilder sql = new StringBuilder();
sql.Append("insert into bluetooth_write ( member_id,bluetooth_name,gmt_modified ,write_state) values ('");
sql.Append(bluetoothWriteEntity.Member_id);
sql.Append("','");
sql.Append(bluetoothWriteEntity.Bluetooth_name);
sql.Append("',");
sql.Append(bluetoothWriteEntity.Gmt_modified);
sql.Append(",");
sql.Append(bluetoothWriteEntity.Write_state);
sql.Append(")");
command.CommandText = sql.ToString();
result = command.ExecuteNonQuery();
}
tr.Commit();
}
return(result);
}
/// <summary>
/// 根据传入的用户id查询最新一条写入的记录
/// </summary>
public static List <BluetoothWriteEntity> ListBluetoothWriteRecord(string timestamp)
{
// 确保连接打开
Open(connection);
//实例化实体类
List <BluetoothWriteEntity> bluetoothWriteEntitys = new List <BluetoothWriteEntity>();
using (var tr = connection.BeginTransaction())
{
using (var command = connection.CreateCommand())
{
StringBuilder sql = new StringBuilder();
sql.Append("select * from bluetooth_write ");
sql.Append("where gmt_modified >= ");
sql.Append(timestamp);
sql.Append(" order by gmt_modified DESC");
command.CommandText = sql.ToString();
// 执行查询会返回一个SQLiteDataReader对象
var reader = command.ExecuteReader();
//reader.Read()方法会从读出一行匹配的数据到reader中。注意：是一行数据。
while (reader.Read())
{
//实例化一个读取实体类
var bluetoothWriteEntity = new BluetoothWriteEntity();
// 有一系列的Get方法，方法的参数是列数。意思是获取第n列的数据，转成Type返回。
// 比如这里的语句，意思就是：获取第0列的数据，转成int值返回。
bluetoothWriteEntity.Id = reader.GetInt64(0);
bluetoothWriteEntity.Member_id = reader.GetString(1);
bluetoothWriteEntity.Write_state = reader.GetInt32(2);
bluetoothWriteEntity.Bluetooth_name = reader.GetString(3);
bluetoothWriteEntity.Gmt_modified = reader.GetInt64(4);
bluetoothWriteEntitys.Add(bluetoothWriteEntity);
}
}
tr.Commit();
return(bluetoothWriteEntitys);
}
}
/// <summary>
/// 根据传入的用户id查询最新一条写入的记录
/// </summary>
public static BluetoothWriteEntity GetBluetoothWrite(string memberId)
{
// 确保连接打开
Open(connection);
//实例化实体类
BluetoothWriteEntity bluetoothWriteEntity = new BluetoothWriteEntity();
using (var tr = connection.BeginTransaction())
{
using (var command = connection.CreateCommand())
{
StringBuilder sql = new StringBuilder();
sql.Append("select * from bluetooth_write where bluetooth_name = '");
sql.Append(memberId);
sql.Append("' AND gmt_modified = (select MAX(gmt_modified) from bluetooth_write)");
command.CommandText = sql.ToString();
// 执行查询会返回一个SQLiteDataReader对象
var reader = command.ExecuteReader();
//reader.Read()方法会从读出一行匹配的数据到reader中。注意：是一行数据。
while (reader.Read())
{
//实例化一个读取实体类
// 有一系列的Get方法，方法的参数是列数。意思是获取第n列的数据，转成Type返回。
// 比如这里的语句，意思就是：获取第0列的数据，转成int值返回。
bluetoothWriteEntity.Id = reader.GetInt64(0);
bluetoothWriteEntity.Member_id = reader.GetString(1);
bluetoothWriteEntity.Write_state = reader.GetInt32(2);
bluetoothWriteEntity.Bluetooth_name = reader.GetString(3);
bluetoothWriteEntity.Gmt_modified = reader.GetInt64(4);
}
}
tr.Commit();
return(bluetoothWriteEntity);
}
}
