Web API Query Data sample (C#)


Unsure about entity vs. table? See Developers: Understand terminology in Microsoft Dataverse.

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#).


This sample implements the Dataverse operations and console output detailed in Web API Query Data Sample and uses the common C# constructs described in Web API Samples (C#).


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 you@yourorg.onmicrosoft.com 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.


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


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


  • 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


  • 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


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

Section 4 Limit and count results


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

Section 5 Pagination


  • 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


  • $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.
  • Multi-level $expand.

Section 7 Aggregate results

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

Section 8 FetchXML queries


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

Section 9 Using predefined queries


  • 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 Metadata Operations Sample (C#)
Web API WebApiService Parallel Operations Sample (C#)
Web API Parallel Operations with TPL Dataflow components Sample (C#)