To retrieve ReportId and DatasetId with other tile details while fetching data from Power BI API

The returned JSON for Get Tiles API would give the reportId and the DatasetId:

Check the API reference:

Get Tiles

The corresponding Tile data is stored under the ODataResponseListTile.Value property, which should be a Tile list.

For the Tile class, see:

Tile class

For example, to get the first tile ReportId:

using Microsoft.PowerBI.Api.V2; 
using Microsoft.PowerBI.Api.V2.Models;
// To retrieve the tile, you first need to retrieve the dashboard. 
// You will need to provide the GroupID where the dashboard resides. 

ODataResponseListDashboard dashboards = client.Dashboards.GetDashboardsInGroup(GroupId); 

// Get the first report in the group. 

Dashboard dashboard = dashboards.Value.FirstOrDefault(); 

// Get a list of tiles from a specific dashboard 

ODataResponseListTile tiles = client.Dashboards.GetTilesInGroup(GroupId, dashboard.Id); 

// Get the first tile in the group. 

Tile tile = tiles.Value.FirstOrDefault();

//Get the first tile ReportId

string rptId = tile.ReportId
or
string rptId = tiles.Value[0].ReportId

Regards,

Michael