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Merge pull request #361 from nzdev/v4/bugfix/split-sorting
Split sorting and paging in docs
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--- | ||
title: Paging | ||
permalink: /paging | ||
uid: paging | ||
order: 4 | ||
--- | ||
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Paging | ||
=== | ||
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_**Tip**: There are many examples of sorting in the [`FluentApiTests` source code](https://github.com/Shazwazza/Examine/blob/master/src/Examine.Test/Search/FluentApiTests.cs) to use as examples/reference._ | ||
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## Paging and Limiting results | ||
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To limit results we can use the [`QueryOptions`](xref:Examine.Search.QueryOptions) class when executing a search query. The [`QueryOptions`](xref:Examine.Search.QueryOptions) class provides the ability to skip and take. | ||
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Examples: | ||
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```csharp | ||
var searcher = indexer.GetSearcher(); | ||
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var takeFirstTenInIndex = searcher | ||
.CreateQuery() | ||
.All() | ||
.Execute(QueryOptions.SkipTake(0, 10)) | ||
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var skipFiveAndTakeFirstTenInIndex = searcher | ||
.CreateQuery() | ||
.All() | ||
.Execute(QueryOptions.SkipTake(5, 10)) | ||
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var takeThreeResults = searcher | ||
.CreateQuery("content") | ||
.Field("writerName", "administrator") | ||
.OrderBy(new SortableField("name", SortType.String)) | ||
.Execute(QueryOptions.SkipTake(0, 3)); | ||
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var takeSevenHundredResults = searcher | ||
.CreateQuery("content") | ||
.Field("writerName", "administrator") | ||
.OrderByDescending(new SortableField("name", SortType.String)) | ||
.Execute(QueryOptions.SkipTake(0, 700)); | ||
``` | ||
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By default when using [`Execute()`](xref:Examine.Search.IQueryExecutor#Examine_Search_IQueryExecutor_Execute_Examine_Search_QueryOptions_) or `Execute(QueryOptions.SkipTake(0))` where no take parameter is provided the take of the search will be set to [`QueryOptions.DefaultMaxResults`](xref:Examine.Search.QueryOptions#Examine_Search_QueryOptions_DefaultMaxResults) (500). | ||
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## Deep Paging | ||
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When using Lucene.NET as the Examine provider it is possible to more efficiently perform deep paging. | ||
Steps: | ||
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1. Build and execute your query as normal. | ||
2. Cast the ISearchResults from IQueryExecutor.Execute to ILuceneSearchResults | ||
3. Store ILuceneSearchResults.SearchAfter (SearchAfterOptions) for the next page. | ||
4. Create the same query as the previous request. | ||
5. When calling IQueryExecutor.Execute. Pass in new LuceneQueryOptions(skip,take, SearchAfterOptions); Skip will be ignored, the next take documents will be retrieved after the SearchAfterOptions document. | ||
6. Repeat Steps 2-5 for each page. |
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- name: Sorting | ||
href: sorting.md | ||
- name: Paging | ||
href: sorting.md#paging-and-limiting-results | ||
href: paging.md |