Developer's Guide - EPiServer World

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20 | Developer’s Guide EPiServer Community 3.1 2.6.2 Filter on custom attributes This is a simple example of how to filter on an attribute. In this case it’s a primitive string attribute, but it could very well also be a complex attribute. If for example it was a Forum attribute, a ForumCriterion would be set instead of a StringCriterion. Nesting of this criterion would then also be possible. //Create a blog query BlogQuery bq = new BlogQuery(); StringCriterion strCriterion = new StringCriterion(); strCriterion.Value = "Stringvalue"; bq["stringattrib"] = strCriterion; bq.Author = new AuthorCriterion(); bq.Author.Name = new StringCriterion(); bq.OrderBy.Add( new CriterionSortOrder(bq.Author.Name, SortingDirection.Ascending)); BlogCollection blogs = BlogHandler.GetQueryResult(bq); 2.6.3 Using And / Or conditions Criteria can be grouped and delimeted with And / Or. In this example we group the Name and NumEntries criteria, which will return Blogs with the name “Blog Test” OR with 7 entries. //Create a new BlogQuery BlogQuery bq = new BlogQuery() //Initialize criterions bq.Name = new StringCriterion(); bq.NumEntries = new IntegerCriterion(); bq.Author = new AuthorCriterion(); bq.Author.Name = new StringCriterion(); //Set values to filter on bq.Name.Value = "Blog Test"; bq.NumEntries.Value = 7; // We group Name and NumEntries and put OR inbetween CriteriaGroup cg = new CriteriaGroup(); cg.AddCriterion(bq.Name); cg.AddCriterion(LogicalOperator.Or, bq.NumEntries); bq.AddCriteriaGroup(cg); //Order by author name bq.OrderBy.Add( new CriterionSortOrder(bq.Author.Name, SortingDirection.Ascending)); //Get the filtered blog collection BlogCollection blogs = BlogHandler.GetQueryResult(bq); © EPiServer AB
Tutorials | 21 2.6.4 Remove Query Result Cache Removes the cached result of a query by passing the original query or a close replica. Import Necessary Namespaces using StarCommunity.Core.Modules; using StarCommunity.Core.Modules.Queries; using StarCommunity.Modules.Blog; using StarCommunity.Modules.Blog.Queries; There are two possible ways a query can be passed to this method: If using exactly as the original query, with the same criteria and parameter values. This will remove the cache for this exact result set, example: // Creating a new blog string name = "My Blog"; Blog blog1 = new Blog(name); blog1 = BlogHandler.AddBlog(blog1); // New blog query BlogQuery bq1 = new BlogQuery(); bq1.Name = new StringCriterion(); bq1.Name.Value = name; bq1.NumEntries = new IntegerCriterion(); bq1.NumEntries.Value = 0; bq1.OrderBy.Add(new CriterionSortOrder(bq1.Name, SortingDirection.Ascending)); // fill up the cache with the query result BlogCollection bc1 = BlogHandler.GetQueryResult(bq1); // remove the cache QueryHandler.RemoveQueryResultCache(bq1); © EPiServer AB
Page 1 and 2: Release 3.1.0 Developer’s Guide
Page 3 and 4: Table of Contents | 3 Table of Cont
Page 5 and 6: Basic Understanding | 5 2.10.5 Addi
Page 7 and 8: Basic Understanding | 7 1 Basic Und
Page 9 and 10: Basic Understanding | 9 1.2.2 EPiSe
Page 11 and 12: Basic Understanding | 11 StarCommun
Page 13 and 14: Basic Understanding | 13 1.2.4 EPiS
Page 15 and 16: Basic Understanding | 15 If MyClass
Page 17 and 18: Basic Understanding | 17 1.3.4 Star
Page 19 and 20: Basic Understanding | 19 1.3.18 Sta
Page 21 and 22: Table of Contents | 3 2 Tutorials 2
Page 23 and 24: Tutorials | 5 Note that when changi
Page 25 and 26: Tutorials | 7 IUser user = (IUser)S
Page 27 and 28: Tutorials | 9 user.BirthDate = new
Page 29 and 30: Tutorials | 11 Attaching the Group
Page 31 and 32: Tutorials | 13 The Tag object is de
Page 33 and 34: Tutorials | 15 2.3.4 Retrieving ent
Page 35 and 36: Tutorials | 17 //Get the category b
Page 37: Tutorials | 19 2.6 Queries The Quer
Page 41 and 42: Tutorials | 23 // Create a blog ent
Page 43 and 44: Tutorials | 25 Below an example of
Page 45 and 46: Tutorials | 27 The logging frequenc
Page 47 and 48: Tutorials | 29 Committing the chang
Page 49 and 50: Tutorials | 31 Get All Blog Entries
Page 51 and 52: Tutorials | 33 2.10 Calendar Calend
Page 53 and 54: Tutorials | 35 Create a New Event C
Page 55 and 56: Tutorials | 37 Create Recurrent Eve
Page 57 and 58: Tutorials | 39 Import Necessary Nam
Page 59 and 60: Tutorials | 41 2.11 Chat The Chat M
Page 61 and 62: Tutorials | 43 2.11.2 Base The base
Page 63 and 64: Tutorials | 45 2.11.5 MessageBox Th
Page 65 and 66: Tutorials | 47 2.12.2 Removing a Cl
Page 67 and 68: Tutorials | 49 Adding an Ad with an
Page 69 and 70: Tutorials | 51 Import Necessary Nam
Page 71 and 72: Tutorials | 53 Get the contact rela
Page 73 and 74: Tutorials | 55 Then create a new Co
Page 75 and 76: Tutorials | 57 2.14.5 Configuration
Page 77 and 78: Tutorials | 59 Then we get the cont
Page 79 and 80: Tutorials | 61 To get a UserCollect
Page 81 and 82: Tutorials | 63 Now we are ready to
Page 83 and 84: Tutorials | 65 Folder inbox = dmc.G
Page 85 and 86: Tutorials | 67 Then we remove it: D
Page 87 and 88: Tutorials | 69 2.17.6 Configuration
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Tutorials | 71 2.18.2 Add a Member
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Tutorials | 73 Check if a User is a
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Tutorials | 75 Assign a Question To
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Tutorials | 77 Get Questions Assign
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Tutorials | 79 2.19 Forum Forums ar
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Tutorials | 81 Locking the Topic To
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Tutorials | 83 2.19.7 Removing a Re
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Tutorials | 85 First we need the Im
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Tutorials | 87 To begin with, we ne
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Tutorials | 89 2.21 Moblog The Mobl
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Tutorials | 91 2.22 MyPage The EPiS
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Tutorials | 93 Getting Blocked User
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Tutorials | 95 2.23 NML NML is a ma
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Tutorials | 97 Limiting Maximum Wor
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Tutorials | 99 Getting a User’s L
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Tutorials | 101 Add a Poll In this
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Tutorials | 103 Voting in a Poll To
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Tutorials | 105 2.25.6 Add Choices
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Tutorials | 107 Import Necessary Na
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Tutorials | 109 2.27.2 Adding video
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Tutorials | 111 Calling AddVideo pr
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Tutorials | 113 2.27.6 Get preview
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Tutorials | 115 2.28 Webmail Webmai
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Tutorials | 117 Import Necessary Na
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Tutorials | 119 Accessing a Mailbox
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Tutorials | 121 Note that it is rec
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Extending EPiServer Community | 123
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