Examples/Data-XLSx-Drive-dlChart.ps1
|
<#
.Description Creates a very simple Excel file with a chart, and uses the Graph API to upload it Then uses the Excel part of the Graph API to extract the chart as a picture, back to the local machine. A roundabout way of getting a chart as a picture from data in Powershell :-) #> Param ( $ExcelFile = 'C:\temp\tempchart.xlsx', $Destination = 'root:/Documents' ) #Remove old files Remove-Item C:\temp\graph.png, $ExcelFile -ea SilentlyContinue #Get some trivial data - the names and lengths of PowerShell files in this module. #Export it to Excel and chart it $excel = Get-ChildItem -path (Get-Module 'Microsoft.Graph.PlusPlus').ModuleBase -Recurse -Include *.ps1 | Select-Object name,length | Export-Excel -PassThru -ChartType BarClustered -AutoNameRange -Path $ExcelFile Add-ExcelChart -Worksheet $excel.Sheet1 -ChartType ColumnClustered -XRange "Name" -YRange "Length" -Column 4 -SeriesHeader "file size" Close-ExcelPackage $excel #Upload the file to current users' one drive. Open the file in Excel web app to see it $graphfile = Copy-ToGraphFolder -Path $ExcelFile -Destination $Destination Start-Process $graphfile.webUrl #We can add /workbook to the end of the URI which refers to a one drive object, so use this to find the first chart ... $chartsURI = "https://graph.microsoft.com/v1.0/me/drive/items/$($graphfile.id)/workbook/worksheets/sheet1/charts" $chartName = (Invoke-RestMethod -Uri $chartsURI -method Get -Headers @{Authorization = "Bearer $AccessToken"} ).value | Select-Object -First 1 -ExpandProperty Name #We can download the chart image - it will come down as base-64 encoded PNG, so convert it back and save it , then open the PNG $imagechars = (Invoke-RestMethod -Uri "$chartsURI/$chartName/image" -Method Get -Headers @{Authorization = "Bearer $AccessToken"} ).value -as [char[]] $imagebytes = [convert]::FromBase64CharArray($imagechars , 0 , $imagechars.Count) [System.IO.File]::WriteAllBytes("C:\temp\graph.png",$imagebytes) Start-Process C:\temp\graph.png |