/// <summary>
/// 异步查询记录数
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="connection"></param>
/// <param name="param"></param>
/// <param name="predicate"></param>
/// <param name="transaction"></param>
/// <param name="commandTimeout"></param>
/// <returns></returns>
public static Task <int> CountAsync <TEntity>(this IDbConnection connection, object param = null,
Expression <Func <TEntity, bool> > predicate = null,
IDbTransaction transaction = null, int?commandTimeout = null)
where TEntity : BaseEntity
{
ISqlAdapter adapter = GetSqlAdapter(connection);
var sql = adapter.GetCount(predicate);
if (param == null)
{
param = adapter.ParamValues;
}
var result = connection.ExecuteScalarAsyncExt <int>(sql, param, transaction, commandTimeout);
return(result);
}