public static IQueryable <T> ApplySortingPaging <T>(this IOrderedQueryable <T> query, SortingPagingDto sortingPaging)
{
var firstPass = true;
foreach (var sortOrder in sortingPaging.SortOrders)
{
if (firstPass)
{
firstPass = false;
query = sortOrder.ColumnOrder == SortOrderDto.SortOrder.Ascending
? query.OrderBy(sortOrder.ColumnName) :
query.OrderByDescending(sortOrder.ColumnName);
}
else
{
query = sortOrder.ColumnOrder == SortOrderDto.SortOrder.Ascending
? query.ThenBy(sortOrder.ColumnName) :
query.ThenByDescending(sortOrder.ColumnName);
}
}
//var result = query.Skip((sortingPaging.PageNumber - 1) *
// sortingPaging.NumberRecords).Take(sortingPaging.NumberRecords);
return(query.AsQueryable());
}
public static IQueryable <TEntity> SortQuery <TEntity>(this IQueryable <TEntity> query, IList <SortOrderModel> sortOrders)
{
var paramExpression = Expression.Parameter(typeof(TEntity), "o");
IOrderedQueryable <TEntity> sortedQuery = null;
for (int i = 0; i < sortOrders.Count; i++)
{
var order = sortOrders[i];
var propertyExpression = Expression.PropertyOrField(paramExpression, order.Field);
var convertExpression = Expression.Convert(propertyExpression, typeof(object));
var lambdaExpression = Expression.Lambda <Func <TEntity, object> >(convertExpression, paramExpression);
if (order.Direction == SortDirectionEnum.ASC)
{
sortedQuery = i == 0 ? query.OrderBy(lambdaExpression) : sortedQuery.ThenBy(lambdaExpression);
}
else
{
sortedQuery = i == 0 ? query.OrderByDescending(lambdaExpression) : sortedQuery.ThenByDescending(lambdaExpression);
}
}
return(sortedQuery.AsQueryable());
}
public static IQueryable <T> ApplySort <T>(this IQueryable <T> queryable, Dictionary <Expression <Func <T, object> >, ListSortDirection> sort)
{
if (sort != null)
{
IOrderedQueryable <T> orderedQueryable = null;
foreach (var sortProperty in sort)
{
if (sortProperty.Value == ListSortDirection.Ascending)
{
orderedQueryable = orderedQueryable is null
? queryable.OrderBy(sortProperty.Key)
: orderedQueryable.ThenBy(sortProperty.Key);
}
else
{
orderedQueryable = orderedQueryable is null
? queryable.OrderByDescending(sortProperty.Key)
: orderedQueryable.ThenByDescending(sortProperty.Key);
}
}
queryable = orderedQueryable is null
? queryable
: orderedQueryable.AsQueryable();
}
return(queryable.AsQueryable());
}
protected void ApplyOrderByExpressions(ref IQueryable <TEntity> query, params OrderByExpression <TEntity>[] orderByExpressions)
{
//append order bys
if (orderByExpressions == null)
{
return;
}
IOrderedQueryable <TEntity> queryOrdered = null;
var isFirstExpr = true;
foreach (var obe in orderByExpressions)
{
if (isFirstExpr)
{
queryOrdered = obe.IsDescending ?
query.OrderByDescending(obe.Expression) :
query.OrderBy(obe.Expression);
isFirstExpr = false;
}
else
{
queryOrdered = obe.IsDescending ?
queryOrdered.ThenByDescending(obe.Expression) :
queryOrdered.ThenBy(obe.Expression);
}
}
//now convert it back to iqueryable
query = queryOrdered.AsQueryable <TEntity>();
}
/// <summary>
/// This method retrieves all Branches.
/// Change this method to alter how records are retrieved.
/// </summary>
public IQueryable <Branch> GetAllBranches()
{
IOrderedQueryable <Branch> query = from branch in DbContext.Branches
orderby branch.Name
select branch;
return(query.AsQueryable());
// return DbContext.Branches.;
}
void IListServer.Apply(DevExpress.Data.Filtering.CriteriaOperator filterCriteria, ICollection <ServerModeOrderDescriptor[]> sortInfo, int groupCount, ICollection <ServerModeSummaryDescriptor> groupSummaryInfo, ICollection <ServerModeSummaryDescriptor> totalSummaryInfo)
{
isCountDirty = true;
isResultDirty = true;
isKeysDirty = true;
count = -1;
startKeyIndex = -1;
startRowIndex = -1;
this.query = this.origQuery;
if (sortInfo != null)
{
Boolean first = true;
IOrderedQueryable <Contact> oq = null;
foreach (ServerModeOrderDescriptor[] info in sortInfo)
{
if (info.Length > 1)
{
throw new NotImplementedException("Multi-grouping is not supported by ASPxGridView");
}
String propertyName = (info[0].SortExpression as OperandProperty).PropertyName;
if (first)
{
if (info[0].IsDesc)
{
oq = LinqHelper.OrderByDescending <Contact>(this.query, propertyName);
}
else
{
oq = LinqHelper.OrderBy <Contact>(this.query, propertyName);
}
first = false;
}
else
{
if (info[0].IsDesc)
{
oq = LinqHelper.ThenByDescending <Contact>(oq, propertyName);
}
else
{
oq = LinqHelper.ThenBy <Contact>(oq, propertyName);
}
}
}
this.query = oq.AsQueryable <Contact>();
}
}
private static IOrderedQueryable <T> OrderBy <T>(this IQueryable <T> source, PageModel pageModel)
{
IOrderedQueryable <T> sorted = null;
for (var index = 0; index < pageModel.SortFields.Count; index++)
{
sorted = source.OrderByOrThenBy <T>(pageModel.SortFields[index], index);
source = sorted.AsQueryable();
}
return(sorted);
}
public IQueryable <T> GetAll <T>(string sortColumn, string sortOrder)
where T : class, IEntityWithKey
{
if (string.IsNullOrEmpty(sortColumn))
{
return(GetAll <T>().AsQueryable());
}
else
{
IOrderedQueryable <T> objectquery = _container.CreateObjectSet <T>().OrderBy("it." + sortColumn + " " + sortOrder);
return(objectquery.AsQueryable());
}
}
public static EntityList <TEntity> GetPagedEntitys <TEntity, Sort1, Sort2>(DbContext db, int pageIndex, int pageSize, Expression <Func <TEntity, bool> > whereLambds, bool isAsc1, Expression <Func <TEntity, Sort1> > orderByLambd1, bool isAsc2, Expression <Func <TEntity, Sort2> > orderByLambd2) where TEntity : class, new()
{
var temp = db.Set <TEntity>().Where <TEntity>(whereLambds);
var rows = temp.Count();
var totalPage = rows % pageSize == 0 ? rows / pageSize : rows / pageSize + 1;
IOrderedQueryable <TEntity> temp1 = isAsc1 ? temp.OrderBy <TEntity, Sort1>(orderByLambd1) : temp.OrderByDescending <TEntity, Sort1>(orderByLambd1);
temp1 = isAsc2 ? temp1.ThenBy <TEntity, Sort2>(orderByLambd2) : temp1.ThenByDescending <TEntity, Sort2>(orderByLambd2);
var temp2 = temp1.AsQueryable <TEntity>().Skip <TEntity>(pageSize * (pageIndex - 1)).Take <TEntity>(pageSize);
var list = temp2.ToList <TEntity>();
var dataList = Activator.CreateInstance(typeof(EntityList <TEntity>)) as EntityList <TEntity>;
dataList.List = list;
dataList.TotalRows = rows;
dataList.TotalPages = totalPage;
return(dataList);
}
private static IQueryable <TEntity> GetQuery(IQueryable <TEntity> query, IList <SortOrderModel> sortOrders, Expression <Func <TEntity, object> >[] includes)
{
if (includes != null)
{
foreach (var include in includes)
{
query = query.Include(include);
}
}
if (sortOrders != null && sortOrders.Any())
{
var paramExpression = Expression.Parameter(typeof(TEntity), "o");
IOrderedQueryable <TEntity> sortedQuery = null;
for (int i = 0; i < sortOrders.Count; i++)
{
var order = sortOrders[i];
var propertyExpression = Expression.PropertyOrField(paramExpression, order.Field);
var convertExpression = Expression.Convert(propertyExpression, typeof(object));
var lambdaExpression = Expression.Lambda <Func <TEntity, object> >(convertExpression, paramExpression);
if (order.Direction == SortDirectionEnum.ASC)
{
sortedQuery = i == 0 ? query.OrderBy(lambdaExpression) : sortedQuery.ThenBy(lambdaExpression);
}
else
{
sortedQuery = i == 0 ? query.OrderByDescending(lambdaExpression) : sortedQuery.ThenByDescending(lambdaExpression);
}
}
query = sortedQuery.AsQueryable();
}
return(query);
}
public static async Task <PagedResult <T> > PaginateAsync <T>(this IOrderedQueryable <T> collection,
int page = 1, int resultsPerPage = 10)
{
return(await collection.AsQueryable().PaginateAsync(page, resultsPerPage));
}
public static PagedResult <T> Paginate <T>(this IOrderedQueryable <T> source, Paging paging)
{
return(source.AsQueryable().Paginate(paging));
}
public static async Task <PagedResult <T> > PaginateAsync <T>(this IOrderedQueryable <T> source, Paging paging)
{
return(await source.AsQueryable().PaginateAsync(paging));
}
public static IQueryable <T> Sort <T>(IQueryable <T> query, IEnumerable <SortableItem> sortables) where T : AbstractEntity
{
IOrderedQueryable <T> _query = null;
foreach (SortableItem sortable in sortables)
{
if (sortable.Mode != 0)
{
Console.WriteLine(sortable.Name);
var type = typeof(T);
var property = type.GetProperty(sortable.Name);
var _parameter = Expression.Parameter(type);
var _property = Expression.Property(_parameter, property);
Console.WriteLine(type + ":" + property.PropertyType.ToString());
switch (property.PropertyType.ToString())
{
case ("System.Int32"):
{
By(ref query, ref _query, sortable.Mode,
Expression.Lambda <Func <T, int> >(_property, _parameter));
break;
}
case ("System.Int64"):
{
By(ref query, ref _query, sortable.Mode,
Expression.Lambda <Func <T, long> >(_property, _parameter));
break;
}
case ("System.String"):
{
By(ref query, ref _query, sortable.Mode,
Expression.Lambda <Func <T, string> >(_property, _parameter));
break;
}
case ("System.DateTime"):
{
By(ref query, ref _query, sortable.Mode,
Expression.Lambda <Func <T, DateTime> >(_property, _parameter));
break;
}
default:
Console.WriteLine("未支持的排序类型.");
break;
}
}
}
Console.WriteLine("完成排序组装");
if (_query != null)
{
return(_query.AsQueryable());
}
return(query);
}
public static IOrderedQueryable <TSource> ThenBy <TSource, TProp>(this IOrderedQueryable <TSource> query, ISortParams sortParams, string prop, Expression <Func <TSource, TProp> > expression)
{
return(query.AsQueryable().OrderBy(sortParams, prop, expression));
}
