/// <summary>
/// check data exist by filter
/// 检查表中是否存在指定内容
/// </summary>
/// <returns></returns>
public Boolean Exist()
{
//数据库连接
if (_connectionConfig.IsAutoCloseConnection == false)
{
if (_database.CheckStatus() == false)
{
throw new Exception("databse connect not open");
}
}
if (_connectionConfig.IsAutoCloseConnection == true)
{
_database.Open();
}
long Count;
if (filterDefinition != null)
{
Count = _database.GetDataCount(_databasename, _TableName, filterDefinition);
}
else
{
Count = _database.GetDataCount(_databasename, _TableName, filterDefinition);
}
if (_connectionConfig.IsAutoCloseConnection == true)
{
_database.Close();
}
if (Count == 0)
{
return(false);
}
else
{
return(true);
}
}