(.NET Core C#) SharePoint -- Download File

Demonstrates how to download a file from SharePoint located in the /Documents folder.

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//  This requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  -------------------------------------------------------------------------
//  The following comments apply to SharePoint Windows classic authentication.
//  -------------------------------------------------------------------------
//  For example, imagine our SharePoint endpoint is https://xyzoffice.mycompany.com/
//  The SHAREPOINT_NTLM_DOMAIN would be "mycompany.com"
//  The SHAREPOINT_HTTPS_DOMAIN would be "xyzoffice.mycompany.com"
//  Also, the SHAREPOINT_USERNAME would be just the name, not a full email address.
//  for example, "chilkat" instead of "chilkat@mycompany.com"

Chilkat.Http http = new Chilkat.Http();

//  If SharePoint Windows classic authentication is used, then set the
//  Login, Password, LoginDomain, and NtlmAuth properties.
http.Login = "SHAREPOINT_USERNAME";
http.Password = "SHAREPOINT_PASSWORD";
http.LoginDomain = "SHAREPOINT_NTLM_DOMAIN";
http.NtlmAuth = true;

//  -------------------------------------------------------------------------
//  The more common case is to use SharePoint Online authentication (via the SPOIDCRL cookie).
//  If so, do not set Login, Password, LoginDomain, and NtlmAuth, and instead
//  establish the cookie as shown at SharePoint Online Authentication
//  -------------------------------------------------------------------------

//  This example downloads the file named "Domain Name created for Exchange.docx"

//  Note: I was initially confused by the "$value" part of the URL.
//  When I see something like $value, I immediately think that it's some sort of
//  variable or placeholder to be replaced with an actual value.  In this case,
//  the "$value" is literally part of the URL.  It's not replace with anything.

string url = "https://SHAREPOINT_HTTPS_DOMAIN/_api/web/GetFolderByServerRelativeUrl('/Documents')/Files('Domain Name created for Exchange.docx')/$value";
string localFilePath = "qa_output/x.docx";

bool success = http.Download(url,localFilePath);
if (success != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("File successfully downloaded from SharePoint.");