public PagingDataSource <T> GetPagingDataSource <T>(string withSql, OrderPagingQuery <T> query,
string tableName = "TResult") where T : class
{
string pageSql = SqlBuildHelper.BuildPageSql(withSql, query, tableName);
string countSql = SqlBuildHelper.BuildCountSql(withSql, tableName);
IList <T> pagedList = Database.SqlQuery <T>(pageSql).ToList();
int count = Database.SqlQuery <int>(countSql).FirstOrDefault();
var result = new PagingDataSource <T>(pagedList, query, count);
return(result);
}
public async Task <PagingQueryResult <OrderPagingQueryDTO> > Handle(OrderPagingQuery request, CancellationToken cancellationToken)
{
var result = new PagingQueryResult <OrderPagingQueryDTO>();
request.CheckPagingParam();
var specification = new OrderPagingSpecification(identityService.GetOrganizationId(), request.Page, request.PageSize, request.OrderBy, request.Desc, request.Search);
result.Total = await orderRepository.Get(specification).CountAsync();
result.Data = await orderRepository.Paging(specification).Select(x => OrderPagingQueryDTO.From(x)).ToListAsync();
return(result);
}
public async Task <IActionResult> Get([FromQuery] OrderPagingQuery query)
{
var list = await _mediator.Send(query);
return(Ok(list));
}
public static PagingDataSource <T> ToPagingDataSource <T>(this IQueryable <T> queryableSource, OrderPagingQuery <T> orderPagingQuery, int recordCount = 0) where T : class
{
if (recordCount == 0 && orderPagingQuery.IsGetRecordCount)
{
recordCount = queryableSource.Count();
}
bool ordered = false;
foreach (OrderField <T> orderfield in orderPagingQuery.OrderFieldStore.OrderFields)
{
string orderType = string.Empty;
if (orderfield.OrderType == OrderType.Descending)
{
orderType = ordered ? "ThenByDescending" : "OrderByDescending";
}
else
{
orderType = ordered ? "ThenBy" : "OrderBy";
}
if (!string.IsNullOrEmpty(orderType))
{
Expression sortExpression = UnBox(orderfield.FieldExpression.Body);
Type sortType = sortExpression.Type;
Type funType = typeof(Func <,>);
funType = funType.MakeGenericType(typeof(T), sortType);
LambdaExpression lambda = Expression.Lambda(funType, sortExpression, orderfield.FieldExpression.Parameters);
MethodCallExpression method = Expression.Call(typeof(Queryable), orderType,
new Type[] { typeof(T), sortExpression.Type }, queryableSource.Expression, lambda);
queryableSource = queryableSource.Provider.CreateQuery <T>(method);
ordered = true;
}
}
return(ToPagingDataSource(queryableSource.Skip(orderPagingQuery.GetSkipCount()).Take(orderPagingQuery.PageSize).ToList(),
orderPagingQuery, recordCount));
}
