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thechriskent
/
ConvertBannerImageUrlToBase64.ps1
Last active
Jun 30, 2020
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ConvertBannerImageUrlToBase64.ps1
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#
Connect to your site
#
(this example assumes an entry in Windows Credential Manager,
#
but you can pass credentials however you need here)
Connect-PnPOnline
https:
//
yourtenant.sharepoint.com
/
sites
/
yoursite
$connection
=
Get-PnPConnection
#
Setup a Web Client using credentials pulled from the connection
$client
=
New-Object
System.Net.WebClient
$client
.Credentials
=
New-Object
Microsoft.SharePoint.Client.SharePointOnlineCredentials(
$connection
.PSCredential.UserName
,
$connection
.PSCredential.Password
)
$client
.Headers.Add
(
"
X-FORMS_BASED_AUTH_ACCEPTED
"
,
"
f
"
)
#
Get a page
#
(You could be doing this in a loop or using Get-PnPClientSidePage)
$page
=
Get-PnPListItem
-
List
"
Site Pages
"
-
Id
294
#
Grab the value of the image and convert it to base-64
#
and slap the data information to the front
$image
=
"
data:image/png;base64,
"
+
[
convert
]::ToBase64String(
$client
.DownloadData
(
$page
.FieldValues.BannerImageUrl.Url
))
#
In this sample, just copying the HTML value to the clipboard to prove it works
#
Normally, you'd build an HTML string and append it for your email
Set-Clipboard
-
Value
"
<img src=
""
$image
""
>
"
#
All done!
$client
.Dispose
()
Disconnect-PnPOnline
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