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Select an Email from Emails provided via API

This sample policy will retrieve a String Collection from and API of emails associated with a user, it will then use javascript to allow the user to select the desired email.

The Policy also has a Policy side validation on the email address that has been entered to ensure it is a valid selection.

Note: This sample policy is based on SocialAndLocalAccounts starter pack. All changes are marked with Demo: comment inside the policy XML files. Make the necessary changes in the Demo action required sections.

Policy artifacts

  1. The Get-Emails Technical Profile will retrieve the claims from rest provider and store them in the otheremails claim. This technical profile also calls the emailstodelimemails claims transformation, to converted the string collection to a comma seperated list of values.
  2. The SelectEmail technical profile will then present the comma separated list value to the user and prompt for an input claim called selectedemail. This claim will have a regular expresion restriction to ensure it is an email.

User interface changes

In this solution, the comma separated list of values provided to the page as a readonly claim by the REST API will be used to generate the dropdown. CSS will also be used to hide the B2C Elements.

An example of these can be seen in the selfAssertedDynamicDropDown.cshtml file.

Below is an exert of the javascript from the above file;

function makeSelect( options) {
    var select = document.createElement( 'select' ),
        optionElem;

    options.split(",").forEach(function( item ) {

        optionElem = document.createElement( 'option' );

        optionElem.value =
            optionElem.textContent =
                item;

        select.appendChild( optionElem );
    });
    select.setAttribute("id", "emailselect");
    return select;
}
var options = $("#emailsdelim")[0].value
$("label[for='selectedemail']").after(makeSelect(options))

$("#selectedemail")[0].value = $("#emailselect option:selected")[0].value

$("#emailselect").change(function() {
$("#selectedemail")[0].value = $("#emailselect option:selected")[0].value
});

Also below is an example response from the REST API in the sample:

{
    "version":"1.0.0.0",
    "status":200,
    "userMessage":"",
    "emails":
        [
            "[email protected]",
            "[email protected]",
            "[email protected]"
        ]
}

Quick start

  1. Modify the policy by replacing all instances of yourtenant.onmicrosoft.com with your tenant name.
  2. Host the selfAssertedDynamicDropDown.cshtml in a storage account and configure CORS to allow your b2clogin.com domain.
  3. Host the .Net Core 3.0 API at your cloud provider.
  4. Modify the api.selfasserted.selectemail content definition's LoadUri to the HTTP endpoint which hosts your selfAssertedDynamicDropDown.cshtml.
  5. Modify the Get-Emails technical profile's serviceUrl to point to your REST API endpoint which responds with the JSON payload of the email array.
  6. Upload the policy files into your tenant.

Live version

Check out a live version of this sample.

Community Help and Support

Use Stack Overflow to get support from the community. Ask your questions on Stack Overflow first and browse existing issues to see if someone has asked your question before. Make sure that your questions or comments are tagged with [azure-ad-b2c]. If you find a bug in the sample, please raise the issue on GitHub Issues. To provide product feedback, visit the Azure Active Directory B2C Feedback page.