Web API Query Data sample (C#)

This .NET 6.0 sample demonstrates how to perform common data operations using the Dataverse Web API.

This sample uses the common helper code in the WebAPIService class library (C#).

Prerequisites

The following is required to build and run this sample:

• Microsoft Visual Studio 2022.
• Access to Dataverse with privileges to perform data operations.

How to run this sample

1. Clone or download the PowerApps-Samples repository.

2. Locate the /dataverse/webapi/C#-NETx/QueryData/ folder.

3. Open the QueryData.sln file using Visual Studio 2022

4. Edit the appsettings.json file to set the following property values:

   Property	Instructions
   Url	The Url for your environment. Replace the placeholder https://yourorg.api.crm.dynamics.com value with the value for your environment. See View developer resources to find this.
   UserPrincipalName	Replace the placeholder [email protected] value with the UPN value you use to access the environment.
   Password	Replace the placeholder yourPassword value with the password you use.

5. Save the appsettings.json file

6. Press F5 to run the sample.

Code

The code for this sample is here: PowerApps-Samples/dataverse/webapi/C#-NETx/QueryData/Program.cs

Demonstrates

This sample has 11 regions:

Section 0: Create Records to query

Operations: Create 1 account record with 9 related contact records. Each contact has 3 related task records.

This is the data that will be used in this sample.

Section 1 Selecting specific properties

Operations:

• Using $select against a contact entity to get the properties you want.
• Including annotations provides access to formatted values with the @OData.Community.Display.V1.FormattedValue annotation

Section 2 Using query functions

Operations:

• Using standard query functions (contains, endswith, startswith) to filter results.
• Using Dataverse query functions (LastXhours, Last7Days, Today, Between, In)
• Using filter operators and logical operators (eq, ne, gt, and, or)
• Set precedence using parenthesis ((criteria1) and (criteria2)) or (criteria3)

Section 3 Ordering and aliases

Operations:

• Using $orderby
• Using parameterized aliases (?@p1=fullname) with $filter and $orderby

Section 4 Limit and count results

Operations:

• Limiting results using $top.
• Get a count value using $count.

Section 5 Pagination

Operations:

• Use the Prefer: odata.maxpagesize request header to limit the number of rows returned.
• Use the url returned with the @odata.nextLink annotation to retrieve the next set of records.

Section 6 Expanding results

Operations:

• $expand with single-valued navigation properties.
• $expand with partner property.
• $expand with collection-valued navigation properties.
• $expand with multiple navigation property types in a single request.
• Nested $expand.
• Nested $expand having both single-valued and collection-valued navigation properties.

Section 7 Aggregate results

Operations: Using $apply=aggregate with average, sum, min, & max.

Section 8 FetchXML queries

Operations:

• Sending requests using fetchXml using ?fetchXml=
• Paging using the page and count attributes.

Section 9 Using predefined queries

Operations:

• Using {entitysetname}?savedQuery={savedqueryid} to return the results of a saved query (system view)
• Using {entitysetname}?userQuery={userquery} to return the results of a user query (saved view)

Section 10: Delete sample records

Operations: A reference to each record created in this sample was added to a list as it was created. In this sample the records are deleted using a $batch operation.

See also

Query Data using the Web API
Web API Query Data Sample
Use the Dataverse Web API Web API Basic Operations Sample (C#)
Web API Conditional Operations sample (C#)
Web API Functions and Actions Sample (C#)
Web API table schema operations sample (C#)
Web API WebApiService Parallel Operations Sample (C#)
Web API Parallel Operations with TPL Dataflow components Sample (C#)