Moved CE content to CDS

Author: phecke

powerapps-docs/developer/common-data-service/org-service/test-null-value.md

@@ -0,0 +1,55 @@
+---
+title: "Test for a null value (Common Data Service) | Microsoft Docs" # Intent and product brand in a unique string of 43-59 chars including spaces
+description: "This sample shows how to test for a null value by using the FilterExpression and QueryByAttribute classes"
+ms.custom: ""
+ms.date: 05/03/2019
+ms.reviewer: ""
+ms.service: powerapps
+ms.topic: "article"
+author: "KumarVivek" # GitHub ID
+ms.author: "kvivek" # MSFT alias of Microsoft employees only
+manager: "amyla" # MSFT alias of manager or PM counterpart
+search.audienceType: 
+  - developer
+search.app: 
+  - PowerApps
+  - D365CE
+---
+
+# Test for a null value
+
+The following code example shows how to test for a null value by using the <xref:Microsoft.Xrm.Sdk.Query.FilterExpression> and <xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute> classes.  
+  
+## Example  
+ Use this code to test for equality by using the <xref:Microsoft.Xrm.Sdk.Query.FilterExpression> class.  
+  
+```csharp  
+FilterExpression null_filter = new FilterExpression(LogicalOperator.And);   
+null_filter.FilterOperator = LogicalOperator.And;   
+null_filter.AddCondition("leadid", ConditionOperator.Null);  
+  
+```  
+  
+## Example  
+ Use this code to test for inequality by using the <xref:Microsoft.Xrm.Sdk.Query.FilterExpression> class.  
+  
+```csharp  
+  
+FilterExpression filter = new FilterExpression(LogicalOperator.And);   
+filter.FilterOperator = LogicalOperator.And;   
+filter.AddCondition("leadid", ConditionOperator.NotNull);  
+```  
+  
+## Example  
+ Use this code to test for equality by using the <xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute> class.  
+  
+```csharp  
+  
+QueryByAttribute qba = new QueryByAttribute("account");   
+qba.ColumnSet = new ColumnSet("name","address1_stateorprovince");   
+qba.AddAttributeValue("donotfax", null);  
+```  
+  
+### See also  
+ [Build Queries with QueryExpression](build-queries-with-queryexpression.md)   
+ [Page large result sets with FetchXML](page-large-result-sets-with-fetchxml.md)

powerapps-docs/developer/common-data-service/org-service/use-querybyattribute-class.md

@@ -1,8 +1,8 @@
 ---
 title: "Use the QueryByAttribute class (Common Data Service) | Microsoft Docs" # Intent and product brand in a unique string of 43-59 chars including spaces
-description: "<Description>" # 115-145 characters including spaces. This abstract displays in the search result.
+description: "You can use the QueryByAttribute class to build queries that test a set of attributes against a set of values"
 ms.custom: ""
-ms.date: 10/31/2018
+ms.date: 05/03/2019
 ms.reviewer: ""
 ms.service: powerapps
 ms.topic: "article"
@@ -15,6 +15,48 @@ search.app:
   - PowerApps
   - D365CE
 ---
+
 # Use the QueryByAttribute class
 
-<!-- https://docs.microsoft.com/dynamics365/customer-engagement/developer/org-service/use-querybyattribute-class -->
+You can use the <xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute> class to build queries that test a set of attributes against a set of values. Use this class with the <xref:Microsoft.Xrm.Sdk.IOrganizationService.RetrieveMultiple*> method or the <xref:Microsoft.Xrm.Sdk.IOrganizationService>.<xref:Microsoft.Xrm.Sdk.Messages.RetrieveMultipleRequest> method.
+  
+ The following table lists the properties that you can set to create a query expression using the <xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute> class.  
+  
+|Property|Description|  
+|--------------|-----------------|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.EntityName>|Specifies which type of entity is retrieved. A query expression can only retrieve a collection of one entity type. You can also pass this value by using the <xref:Microsoft.Xrm.Sdk.Query.QueryExpression> constructor.|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.ColumnSet>|Specifies the set of attributes (columns) to retrieve.|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.Attributes>|Specifies the set of attributes selected in the query.|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.Values>|Specifies the attribute values to look for when the query is executed.|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.Orders>|Specifies the order in which the records are returned from the query.|  
+|<xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute.PageInfo>|Specifies the number of pages and the number of records per page returned from the query.|  
+  
+ The following code example shows how to use the `QueryByAttribute` class.  
+  
+```csharp  
+//  Create query using querybyattribute      
+QueryByAttribute querybyexpression = new QueryByAttribute("account");      
+querybyexpression.ColumnSet = new ColumnSet("name", "address1_city", "emailaddress1");  
+  
+//  Attribute to query      
+querybyexpression.Attributes.AddRange("address1_city");  
+  
+//  Value of queried attribute to return      
+querybyexpression.Values.AddRange("Detroit");      
+  
+//  Query passed to the service proxy      
+EntityCollection retrieved = _serviceProxy.RetrieveMultiple(querybyexpression);     
+  
+//  Iterate through returned collection      
+foreach (var c in retrieved.Entities)      
+{  
+      System.Console.WriteLine("Name: " + c.Attributes["name"]);  
+      System.Console.WriteLine("Address: " + c.Attributes["address1_city"]);        
+      System.Console.WriteLine("E-mail: " + c.Attributes["emailaddress1"]);      
+}  
+  
+```  
+  
+### See also  
+ [Build Queries with QueryExpression](build-queries-with-queryexpression.md)   
+ <xref:Microsoft.Xrm.Sdk.Query.QueryByAttribute>