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AL code for send email with multiple recipient

To send an email with multiple recipients using AL code in Microsoft Dynamics 365 Business Central, you can utilize the `EmailMgt` codeunit and the `Send` function. Here's an example of how you can achieve this:

```AL

PROCEDURE SendEmailWithMultipleRecipients@1()

VAR

EmailMgt@1: Codeunit 400;

EmailMessage@2: Record 441;

Recipients@3: Record 442;

BEGIN

EmailMessage.INIT;

EmailMessage.Subject := 'Test Email';

EmailMessage.Body := 'This is a test email sent to multiple recipients.';

Recipients.INIT;

Recipients."E-mail" := 'recipient1@example.com';

Recipients.Insert;

Recipients."E-mail" := 'recipient2@example.com';

Recipients.Insert;

Recipients."E-mail" := 'recipient3@example.com';

EmailMgt.Send(EmailMessage, Recipients);

END;

```

In this example, we create a new email message by initializing the `EmailMessage` record and setting the subject and body of the email. Then, we initialize the `Recipients` record and insert multiple recipients by setting their email addresses. Finally, we call the `Send` function of the `EmailMgt` codeunit, passing in the `EmailMessage` and `Recipients` records.

Make sure to replace the email addresses with the actual email addresses of the recipients you want to send the email to.

Please note that you need to have the necessary email settings configured in Business Central for sending emails, such as the SMTP server details.

What Is Business Central ?

Business Central is a comprehensive business management solution developed by Microsoft. Formerly known as Microsoft Dynamics NAV, Business Central is a cloud-based enterprise resource planning (ERP) system that helps small and medium-sized businesses streamline their operations and make informed decisions.

Business Central offers a wide range of functionalities, including financial management, supply chain management, sales and customer relationship management (CRM), project management, manufacturing, and service management. It integrates different aspects of a business, enabling companies to manage their finances, track inventory, handle sales and purchasing, streamline operations, and gain insights into business performance.

Key features of Business Central include:

1. Financial Management: Business Central provides tools for managing general ledger, accounts payable and receivable, cash flow, budgeting, fixed assets, and financial reporting.

2. Supply Chain Management: It allows businesses to manage inventory, track orders and shipments, handle purchasing and vendor management, and optimize supply chain processes.

3. Sales and CRM: Business Central includes sales management features such as quote and order management, invoicing, sales forecasting, and customer relationship management capabilities.

4. Project Management: It enables project planning, resource management, time and expense tracking, and budgeting for businesses that engage in project-based work.

5. Manufacturing: Business Central supports production planning, capacity management, bill of materials (BOM), and shop floor control to help manufacturing companies optimize their operations.

6. Service Management: It offers tools for managing service contracts, scheduling resources, tracking service orders, and managing field service operations.

7. Reporting and Analytics: Business Central provides robust reporting and analytics capabilities, allowing businesses to generate real-time insights, create custom reports, and make data-driven decisions.

Business Central is designed to be user-friendly, with a familiar interface similar to other Microsoft products, making it easier for users to navigate and adopt the system. It can be accessed through a web browser or via mobile apps, enabling users to work from anywhere, anytime.

As a cloud-based solution, Business Central offers benefits such as automatic updates, data security, scalability, and the ability to integrate with other Microsoft applications and third-party solutions, enhancing its flexibility and functionality.

Overall, Microsoft Business Central is aimed at helping businesses automate processes, improve efficiency, and gain better visibility into their operations, leading to increased productivity and growth.

What Al programming ?

AL (Advanced Language) is the programming language used in Microsoft Dynamics 365 Business Central, formerly known as Microsoft Dynamics NAV. AL is specifically designed for developing extensions and customizations within the Business Central platform.

AL is a statically typed, procedural programming language with object-oriented capabilities. It is similar to other programming languages like C/AL (C/SIDE) and C#. However, AL is more lightweight and focused on the needs of Business Central development.

Here are some key features and characteristics of AL programming:

1. Object-Oriented: AL supports object-oriented programming (OOP) concepts such as encapsulation, inheritance, and polymorphism. Developers can define classes, objects, properties, methods, and events to build modular and reusable code.

2. Data Types: AL has various data types, including text, integer, decimal, boolean, date, time, and more. Developers can declare variables, constants, and parameters using these data types.

3. Code Units and Functions: AL programs are organized into code units, which are containers for functions and procedures. Functions in AL can have input and output parameters and can return values.

4. Events: AL allows developers to subscribe to predefined events in the Business Central platform, such as "OnInsert," "OnModify," or "OnValidate." This enables custom code to execute when certain actions or conditions occur.

5. Integration with Business Central Objects: AL allows developers to define and modify various objects within Business Central, such as tables, pages, reports, and codeunits. This enables the customization and extension of the application's functionality.

6. IntelliSense and Visual Studio Code: Developers can write AL code using Visual Studio Code, a lightweight and extensible code editor. Visual Studio Code provides IntelliSense, a feature that suggests code completions and provides contextual information to help developers write code more efficiently.

7. Debugging and Testing: AL supports debugging capabilities, allowing developers to set breakpoints, step through code, inspect variables, and analyze program flow. Developers can also write unit tests to verify the correctness of their code.

8. Extensions: AL is primarily used for creating extensions for Business Central. Extensions are modular components that add custom functionality to the existing Business Central application without modifying the core system. AL allows developers to define tables, pages, codeunits, and other objects within an extension.

Microsoft provides development tools, documentation, and resources to assist developers in learning and working with AL. With AL programming, developers can extend Business Central's capabilities, create tailored solutions, integrate with external systems, and meet specific business requirements.

HTTP Class and Functions - Business Central

You can access REST services through HTTP requests. To implement an HTTP request, you need to use an HTTP verb.

The following verbs are the most-used verbs in REST services:

GET (to read data)
POST (to create data)
PUT (to update/replace data)
PATCH (to update/modify data)
DELETE (to delete data)

HttpClient class

The HttpClient class provides a base class for sending HTTP requests and receiving HTTP responses from a resource that is identified by a URI.

DefaultRequestHeaders() - Gets the default request headers that should be sent with each request.
SetBaseAddress(Uri) - Sets the base address of the URI that is used when you are sending requests.
Get(Uri, HttpResponseMessage) - Sends a GET request to get the resource that is identified by the request URI.
Post(Uri, HttpContent, HttpResponseMessage) - Sends a POST request to the specified URI.
Put(Uri, HttpContent, HttpResponseMessage) - Sends a PUT request to the specified URI.
Delete(Uri, HttpResponseMessage) - Sends a DELETE request to the specified URI.
Send(HttpRequestMessage, HttpResponseMessage) - Sends an HTTP request. In the HttpRequestMessage variable, you must provide the URI and the verb to use.
Clear() - Sets the HttpClient variable to the default value.
Timeout() - Gets or sets the duration in seconds to wait before the request times out. Timeout is an integer value.
AddCertificate(Certificate, Password) - Adds a certificate to the HttpClient class. You need to provide a base64 encoded certificate.

When providing a URI, you can use two approaches. The first approach is to request data from the following URL:

https://jsonplaceholder.typicode.com/posts

Then, you can use the SetBaseAddress when you are using the HttpClient class to perform multiple requests.

var

client: HttpClient;

responseMessage: HttpResponseMessage;

begin

client.SetBaseAddress('https://jsonplaceholder.typicode.com/');

client.Get('posts', responseMessage);

end;

The second approach is for when you are only requesting the data once. In that case, you can put the full URI in the Get function.

var

client: HttpClient;

responseMessage: HttpResponseMessage;

begin

client.Get('https://jsonplaceholder.typicode.com/posts', responseMessage);

end;

HttpHeaders class

The HttpHeaders class contains a collection of headers and their values. HttpHeaders are sent with every request and response, and they are used to send extra information about the request or how the client wants the response to be formatted.

Common HttpHeaders are Authorization (used to send authentication credentials), Content-Type (the media type of the body of the request), User-Agent (the user agent string, the name of the browser), Accept-Charset (which character sets are acceptable).

You can get the HttpHeaders by using the DefaultRequestHeaders property from the HttpClient class.

var

client: HttpClient;

headers: HttpHeaders;

content: HttpContent;

responseMessage: HttpResponseMessage;

begin

headers := client.DefaultRequestHeaders();

headers.Add('Content-Type','application-json');

client.Post('https://jsonplaceholder.typicode.com/posts', content,

responseMessage);

end;

Add(Key, Value) - Sets the provided value for the provided header name.
Clear() - Sets the HttpHeaders variable to the default value.
Contains(Key) - Checks if an HttpHeaders variable contains a property with the given key.
GetValues(Key, Array of Text) - Get the values for the specified key. The values are returned in the array of text.
Remove(Key) - Removes the key and the related values from the HttpHeaders object.

HttpResponseMessage class

The HttpResponseMessage class represents an HTTP response message. A response message is the result of an HTTP action (Get, Post, Put, Delete). It is returned in the HttpResponseMessage parameter.

var

client: HttpClient;

responseMessage: HttpResponseMessage;

begin

client.Get('https://jsonplaceholder.typicode.com/posts', responseMessage);

end;

Content() - Gets the contents (HttpContent) of the HTTP response.
Headers() - Gets the HTTP request's HTTP headers.
HttpStatusCode() - Gets the status code of the HTTP response.
IsSuccessStatusCode() - Gets a value that indicates if the HTTP response was successful.
ReasonPhrase() - Gets the reason phrase that is typically sent together with the status code. You can use this variable to give the user extra information when a request failed.

HttpContent class

The HttpContent class represents an HTTP body and content headers, and it is used as the body to send information or as a response body. You can use the Content property on the HttpRequestMessage (with a request) or the HttpResponseMessage (with a response) classes.

Clear() - Sets the HttpContent object to a default value.
GetHeaders(HttpHeaders) - Gets the content's HTTP headers. The result is returned in the HttpHeaders parameter.
ReadAs(Result) - Reads the content into the provided text or stream. The result can be of type Text or InStream.
WriteFrom(Value) - Sets the HttpContent variable to the provided text or stream.

HttpRequestMessage class

The HttpRequestMessage class represents an HTTP request message. A request message is the class that is used to send a request.

[Ok := ] HttpClient.Send(HttpRequestMessage, HttpResponseMessage);

Content() - Gets/sets the contents of the HTTP request.
GetRequestUri() - Gets the URI that is used for the HTTP request.
Method() - Gets or sets the method type. You must provide an HTTP verb that is used with this request.
SetRequestUri(RequestUri) - Sets the URI that is used for the HTTP request.

var

client: HttpClient;

requestMessage: HttpRequestMessage;

responseMessage: HttpResponseMessage;

begin

requestMessage.Method('GET');

requestMessage.SetRequestUri('https://jsonplaceholder.typicode.com/posts');

client.Send(requestMessage, responseMessage);

end;

REST API Services - Business Central

You can use the built-in HTTP data types to get data from external REST services from within Dynamics 365 Business Central. In this module, you'll learn about these data types and how to work with JSON data in AL.

Learning objectives

In this module, you will:

Use HTTP data types.
Connect to external REST services and read data.
Connect to external REST services and post data.
Read JSON data in Business Central.
Get JSON from an external REST service.

Application language (AL) in Dynamics 365 Business Central has several data types, such as text, code, integer, and option. Application language also supports HTTP data types.

You can't create a field in a table of an HTTP data type, but you can create variables in code. Application language supports a set of HTTP classes for sending and receiving data from HTTP services. These classes are an implementation of the System.Net.Http classes from the .NET Framework. The available classes are:

HttpClient
HttpContent
HttpHeaders
HttpRequestMessage
HttpResponseMessage

All HTTP types are reference types, not value types, which you'll learn how to use in your own AL code.