download sharepoint webpart programmatically.

Question

We are migrating webparts programmatically.
We used to use this code in the past but it is not working with modern authentication.

Can you share piece of code for doing this when legacyauth is turned off?

private string DownloadFile(string url)
{
SecureString theSecureString = new NetworkCredential("", _password).SecurePassword;
SharePointOnlineCredentials onlineCredentials = new SharePointOnlineCredentials(_username, theSecureString);
_authCookieValue = onlineCredentials.GetAuthenticationCookie(new Uri(fileUrl));

using (CookieAwareWebClient client = new CookieAwareWebClient())
{
client.CookieContainer = new CookieContainer();
client.CookieContainer.Add(new Cookie("SPOIDCRL", _authCookieValue.TrimStart("SPOIDCRL=".ToCharArray()), String.Empty, authority));
string localPath = Path.GetTempPath();
string temporaryGuid = Guid.NewGuid().ToString();
string path = System.IO.Path.Combine(localPath, temporaryGuid);
client.DownloadFile(fileUrl, path);
document = System.IO.File.ReadAllText(path);
System.IO.File.Delete(path);
}
}
etc...
}

string itemWebPartDefUrl = string.Format(
"{0}{1}/_vti_bin/exportwp.aspx?pageurl={2}&guidstring={3}",
_rootPrefixURL,
webServerRelativeUrl,
pageURL,
wpDef.Id.ToString().ToLower()
);
Uri targetSite = new Uri(_context.Web.Url);
string xmlDef = _directLayer.DownloadFile(itemWebPartDefUrl, targetSite.Authority);

Answer 1

Many webparts are marked as not exportable, therefore the solution does not give entire satisfaction, but that's ok.

Answer 2

Hi @Emmanuel Dreux ,
Exporting Web Parts using CSOM is very easy and comes down to calling the LimitedWebPartManager.ExportWebPart method passing the ID of the Web Part to export as its parameter:

using (ClientContext ctx = new ClientContext("https://contoso.sharepoint.com")) {  
  SecureString password = new SecureString();  
  // setting password omitted for brevity  
  ctx.Credentials = new SharePointOnlineCredentials("******@contoso.onmicrosoft.com", password);  
  File file = ctx.Web.GetFileByServerRelativeUrl("/pages/default.aspx");  
  LimitedWebPartManager wpMgr = file.GetLimitedWebPartManager(PersonalizationScope.Shared);  
  Guid webPartId = new Guid("468a7c31-053b-41b3-9e7e-d658a3ecb7fc");  
  ClientResult<string> webPartXml = wpMgr.ExportWebPart(webPartId);  
  ctx.ExecuteQuery();  
  
  // Web Part XML: webPartXml.Value  
}  

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

---