How to Call D365 Custom API from C#

To call a Dynamics 365 (D365) custom API from C#, you can follow the steps outlined below:

1.Import the necessary namespaces:

using System;

using System.Net.Http;

using System.Threading.Tasks;

2. Create an instance of the HttpClient class:

HttpClient httpClient = new HttpClient();

3. Set the base URL of your D365 environment and the API endpoint:

string baseApiUrl = "https://your-d365-environment-url/api/data/v9.1";

string apiEndpoint = "/your-custom-api-endpoint";

4. Set the request headers, including the authorization header if required:

httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");

httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0");

httpClient.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

// Add any other required headers, such as authorization

5. Make the HTTP request to the custom API endpoint:

HttpResponseMessage response = await httpClient.GetAsync($"{baseApiUrl}{apiEndpoint}");

6. Check the response status and process the result:

if (response.IsSuccessStatusCode)

{

    string jsonResponse = await response.Content.ReadAsStringAsync();

    // Process the JSON response as needed

}

else

{

    Console.WriteLine($"API call failed with status code: {response.StatusCode}");

    // Handle the error response as needed

}

Note that the above example assumes that you are making a GET request to the custom API endpoint. Depending on your API, you may need to modify the request method (GetAsync, PostAsync, etc.) and include any required request body or parameters.

Additionally, if your API requires authentication, you will need to include the appropriate authorization headers in step 4. The method of authentication will depend on your D365 environment and the security mechanisms in place.

Remember to handle exceptions and dispose of the HttpClient object properly to prevent resource leaks.

By following these steps, you can call a D365 custom API from your C# application and process the response accordingly.