dataverse_create_update_delete.cs

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

public class DataverseCreateUpdateDeleteExample
{
    public static async Task Main()
    {
        var environmentUrl = "https://yourorg.crm.dynamics.com";
        var accessToken = "YOUR_ACCESS_TOKEN";
        var accountId = await CreateAccountAsync(environmentUrl, accessToken);

        await UpdateAccountAsync(environmentUrl, accessToken, accountId);
        await DeleteAccountAsync(environmentUrl, accessToken, accountId);
    }

    private static HttpClient CreateClient(string accessToken)
    {
        var client = new HttpClient();
        client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        client.DefaultRequestHeaders.Add("OData-Version", "4.0");
        client.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");
        return client;
    }

    private static async Task<string> CreateAccountAsync(string environmentUrl, string accessToken)
    {
        using var client = CreateClient(accessToken);
        var payload = """
        {
          "name": "Contoso Example Account",
          "telephone1": "03 9000 0000"
        }
        """;

        using var content = new StringContent(payload, Encoding.UTF8, "application/json");
        var response = await client.PostAsync(environmentUrl + "/api/data/v9.2/accounts", content);
        response.EnsureSuccessStatusCode();

        var entityId = response.Headers.GetValues("OData-EntityId");
        foreach (var headerValue in entityId)
        {
            var start = headerValue.LastIndexOf('(');
            var end = headerValue.LastIndexOf(')');
            if (start >= 0 && end > start)
            {
                var id = headerValue[(start + 1)..end];
                Console.WriteLine($"Created account: {id}");
                return id;
            }
        }

        throw new InvalidOperationException("Could not determine the created record ID.");
    }

    private static async Task UpdateAccountAsync(string environmentUrl, string accessToken, string accountId)
    {
        using var client = CreateClient(accessToken);
        var payload = """
        {
          "telephone1": "03 9555 1234"
        }
        """;

        using var content = new StringContent(payload, Encoding.UTF8, "application/json");
        var response = await client.PatchAsync(environmentUrl + $"/api/data/v9.2/accounts({accountId})", content);
        response.EnsureSuccessStatusCode();
        Console.WriteLine($"Updated account: {accountId}");
    }

    private static async Task DeleteAccountAsync(string environmentUrl, string accessToken, string accountId)
    {
        using var client = CreateClient(accessToken);
        var response = await client.DeleteAsync(environmentUrl + $"/api/data/v9.2/accounts({accountId})");
        response.EnsureSuccessStatusCode();
        Console.WriteLine($"Deleted account: {accountId}");
    }
}