Adding tags to SharePoint file with Graph Service Client

Question

Hiya,

I'm currently working on a project where the goal is to automatically update SharePoint. Recently, I stumbled upon a problem with adding tags to an item. I have a multi choice property in SharePoint, but I can't seem update this with the graph api. I specifically want it to be a multi choice property/tag. I'm using the Microsoft.Graph SDK. All permissions are present to connect/view/edit the SharePoint page.

The intended use would be that there are multiple values assigned to the same key. The column is a selection column with multipled values enabled.

Any help would be appreciated! Code snippet is below

var tags = new List<string> {date, someLaterDate};

var requestBody = new FieldValueSet
{
    AdditionalData = new Dictionary<string, object>
    {
        { "Time", tags}
    }
};

await _graphServiceClient.Sites[siteId].Lists[listId].Items[listItem.Id].Fields.PatchAsync(requestBody);

Answer 1

Hi @ThibaultVerlinde-4578,

It seems that the error you are receiving is because the "Time" field is not recognized. In order to update a multi-choice column in SharePoint using the Microsoft Graph SDK, you need to specify the internal name of the column. You can find the internal name of the column by going to the column settings page in SharePoint and looking at the URL. The internal name will be in the URL after "Field=".

Reference: https://sharepointstuff.com/2022/02/09/find-internal-column-name/.

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