D365 Business Central, PowerApps

Business Central Images to a Canvas Power App Gallery

For those who missed it I did a session for BC Tech Talk last year:

During that session I showed how to get a single image for an item record with an API call (35mins and beyond). The method was very simple to create a custom connector for the standard Picture API and just add a extra bit of text. Similar to this: https://api.businesscentral.dynamics.com/v1.0/8d0632b1-47bf-41fe-ba13-a838adf98c48/sandbox/api/v1.0/companies({companyID})/items({itemID})/picture({pictureID})/content

The green text pulls the image directly into an image control in the canvas app 👍. I mention in the video that you could have the picture images in the main gallery view – it will be slower this way but I was asked to at least explain how. The standard API isn’t that helpful here – VERY HAPPY TO BE TOLD HOW TO USE IT CORRECTLY – the endpoint doesn’t interact in the same was as a HTTP request would and it wants to produce a table of data and no matter how I work with the connector with the available formulas I just get errors. Can see from the Power Users forum this is a similar theme with others:

So to get around this a new page is needed with some extra capability. The end goal here is to create a custom connector for use in powerapps that gives the base64 image value for BC item records. I took inspiration for the solution from this blog which I’ve adapted slightly for latest version (at the time of writing being 17.2 – may have changed since): How to get picture from MediaSet through standard APIs. – Dynamics 365 Business Central Community

Final code is on github – Code: https://github.com/JAng13sea/Blogs/tree/master/ItemImages – but in essence you need a new API page for the item table. A field on the API page which is populated by a codeunit return value of text which has been converted into base64:

    procedure "Pic as JSON"(ItemNo: Code[20]) : Text;
        Item: Record Item;
        TenantMedia: Record "Tenant Media";
        PicText: Text;
        PicInstr: InStream;
        JObject: JsonObject;
        JToken: JsonToken;
        TempBlob: Codeunit "Temp Blob";
        PicOStr: OutStream;
        Base64: Codeunit "Base64 Convert";
        If Item.Picture.Count = 0 then
        if TenantMedia.Content.HasValue then begin
            PicText := Base64.ToBase64(PicInstr);

Note that it has been added into a JSON structure to make it easy for other solutions to read it. From here you will need to create a custom connector for Power Platform. I did another video on this so check it out if you need guidance on that part:

Once the connector is in place and you have pulled the data from BC into a collection in PowerApps you can address the image value in the gallery. When using a gallery in PowerApps a predefined method exists for stating each row of the gallery – ThisItem – the value passed from BC is in Base64 but it needs decoding in PowerApps for an image control to display it. In the image control add the text “data:image; application/octet-stream; base64,” & ThisItem.picture

Depending on the volume of items with images this type of call could be very long so tread with caution. If you happen to be using images with other data or storing other blobs this pattern is a way to get the data into PowerApps.


PowerApps biz card reader to Business Central

This one comes with a premium as the PowerApps business card reader isn’t included in the license for BC. However, it’s a really good use of AI and something that could be utilised in the right scenario. Ironic that I’m blogging about something that won’t be getting much use right now. I haven’t acquired a new business card since March 2020. However, it feels as though the exchange of fancy pieces of card might be behind us and scanning something is a cleaner option, in more ways than one 😊

A number of other online resources can explain the PowerApps build up so I will highlight the important parts. The goal here will be to take an image of a business card and have the details from the AI model sent to BC so a company or person contact can be created.

Add the business card reader from the AI builder and then add text input boxes which reference the properties of the business card reader. Use text input boxes as the data from the reader won’t always be perfect so some editing might be needed.

As you can see here the Company Name doesn’t quite work out so some manual adjustment is needed.

The next thing is to have the data passed and to do this I’ve used Power Automate. A button will be created in PowerApps that calls the flow that is needed. A few steps to the flow so I’ll break it into sections. Use a PowerApps trigger as the starting point:

In PowerApps we will build a JSON so add a Parse JSON and request the content from PowerApps. Note that it will most likely change the name as mine is above. A sample schema is needed:

{    “type”: “array”,    “items”: {        “type”: “object”,        “properties”: {            “Address1”: {                “type”: “string”            },            “AddressCity”: {                “type”: “string”            },            “CompanyName”: {                “type”: “string”            },            “Country”: {                “type”: “string”            },            “Email”: {                “type”: “string”            },            “FirstName”: {                “type”: “string”            },            “JobTitle”: {                “type”: “string”            },            “LastName”: {                “type”: “string”            },            “Mobile”: {                “type”: “string”            },            “OfficePhone”: {                “type”: “string”            },            “PostCode”: {                “type”: “string”            },            “Website”: {                “type”: “string”            }        },        “required”: [            “Address1”,            “AddressCity”,            “CompanyName”,            “Country”,            “Email”,            “FirstName”,            “JobTitle”,            “LastName”,            “Mobile”,            “OfficePhone”,            “PostCode”,            “Website”        ]    }}

Next up an “Apply to each” section is required where the body of the JSON is used. In our case there will be one value at a time but a JSON can handle multiples. A series of HTTP triggers will follow along:

  1. A GET to determine if the “Company Name” value can be found in BC already. For this to happen I have published page 5050 as a web service and particular ODATA filtering is needed ?$filter=Type%20eq%20%27Company%27%20and%20Company_Name%20eq%20%27′<CompanyName>’%27
  2. A POST for a Company Contact for the occasions where this detail isn’t available yet. The displayed “Headers” will be needed and the “Body” will be made up of a mix of static values and those from the PowerApps JSON:

3. A final POST to handle the creation of a person contact. This will be repeated so use the “Copy to Clipboard” feature to save time having to type it out again.

A “Condition” has been added off the back of using the GET command and the returned “Body” is checked to see if the Company Name from the PowerApps JSON exists in the JSON of the GET Company HTTP. This will result in the “Yes” command or the “No” commands taking place. Once this is saved then it is ready for hooking up to PowerApps.

Create a new button in PowerApps and use the “Action” part of the ribbon to call on Power Automate. Choose the flow that was devised from the earlier steps. This will add one line to the formula area of PowerApps. Use the shift key and enter to add some additional lines above that inserted line. Some earlier steps are needed before the detail for Power Automate is ready. I’ll break this into sections too:

A Collection will be built up of all the values from the Biz card reader. Refer to the online documentation to understand the PowerApps formulas further:

ClearCollect(BizCardContact,{CompanyName: CompanyName.Text,FirstName:Concatenate(firstname.Text,” “,Lastname.Text),LastName: Lastname.Text,Email:Email.Text,Address1: BusinessCardReader1.AddressStreet,AddressCity: BusinessCardReader1.AddressCity,PostCode: BusinessCardReader1.AddressPostalCode, Country: BusinessCardReader1.AddressCountry,JobTitle: JobTitle.Text,OfficePhone: OfficePhone.Text,Mobile:MobilePhone.Text,Website: Website.Text});

A JSON is required in Power Automate and it can be built in PowerApps using the collection from the formula above:


Last thing is to pass the JSON to Power Automate:


In full flight you will get one of two results, two contacts or just a person contact. Note the green ticks in the top right of each window to show what has been executed: