SharePoint Online Connector for C#

SharePoint Connector can be used to read, write data in SharePoint Online List / Document Library, perform file operations such as upload, download, create, move, delete, rename in a few clicks!

In this article you will learn how to quickly and efficiently integrate SharePoint Online data in C#. We will use high-performance SharePoint Online Connector to easily connect to SharePoint Online and then access the data inside C#.

Let's follow the steps below to see how we can accomplish that!

Download Documentation

Create ODBC Data Source (DSN) based on ZappySys API Driver

Step-by-step instructions

To get data from SharePoint Online using C# we first need to create a DSN (Data Source) which will access data from SharePoint Online. We will later be able to read data using C#. Perform these steps:

  1. Download and install ODBC PowerPack.

  2. Open ODBC Data Sources (x64):

    Open ODBC Data Source
  3. Create a User data source (User DSN) based on ZappySys API Driver

    ZappySys API Driver
    Create new User DSN for ZappySys API Driver
    • Create and use User DSN if the client application is run under a User Account. This is an ideal option in design-time, when developing a solution, e.g. in Visual Studio 2019. Use it for both type of applications - 64-bit and 32-bit.
    • Create and use System DSN if the client application is launched under a System Account, e.g. as a Windows Service. Usually, this is an ideal option to use in a production environment. Use ODBC Data Source Administrator (32-bit), instead of 64-bit version, if Windows Service is a 32-bit application.
  4. When the Configuration window appears give your data source a name if you haven't done that already, then select "SharePoint Online" from the list of Popular Connectors. If "SharePoint Online" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:

    SharepointOnlineDSN
    SharePoint Online
    ODBC DSN Template Selection
  5. Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.

    Use delegated access (User Credentials) whenever you want to let a signed-in user work with their own resources or resources they can access. Whether it's an admin setting up policies for their entire organization or a user deleting an email in their inbox, all scenarios involving user actions should use delegated access. [API reference]

    Steps how to get and use SharePoint Online credentials

    Follow these simple steps below to create Microsoft Entra ID application with delegated access:

    WARNING: If you are planning to automate processes, we recommend that you use a Application Credentials authentication method. In case, you still need to use User Credentials, then make sure you use a system/generic account (e.g. automation@my-company.com). When you use a personal account which is tied to a specific employee profile and that employee leaves the company, the token may become invalid and any automated processes using that token will start to fail.
    1. Navigate to the Azure Portal and log in using your credentials.
    2. Access Microsoft Entra ID.
    3. Register a new application by going to App registrations and clicking on New registration button:

      Start new app registration in Microsoft Entra ID
      INFO: Find more information on how to register an application in Graph API reference.
    4. When configuration window opens, configure these fields:

      • Supported account type
        • Use Accounts in this organizational directory only, if you need access to data in your organization only.
      • Redirect URI:
        • Set the type to Public client/native (mobile & desktop).
        • Use https://zappysys.com/oauth as the URL.
      Register app in Microsoft Entra ID
    5. After registering the app, copy the Application (client) ID for later:

      Copy client ID of Microsoft Entra ID app
    6. Copy OAuth authorization endpoint (v2) & OAuth token endpoint (v2) URLs to use later in the configuration:

      Copy Auth and Token URLs in Microsoft Entra ID app
    7. Now go to SSIS package or ODBC data source and use the copied values in User Credentials authentication configuration:

      • In the Authorization URL field paste the OAuth authorization endpoint (v2) URL value you copied in the previous step.
      • In the Token URL field paste the OAuth token endpoint (v2) URL value you copied in the previous step.
      • In the Client ID field paste the Application (client) ID value you copied in the previous step.
      • In the Scope field use the default value or select individual scopes, e.g.:
        • email
        • offline_access
        • openid
        • profile
        • User.Read
        • Sites.Read.All
        • Sites.ReadWrite.All
        • Files.Read.All
        • Files.ReadWrite.All
    8. Press Generate Token button to generate Access and Refresh Tokens.
    9. Optional step. Choose Default Site Id from the drop down menu.
    10. Click Test Connection to confirm the connection is working.
    11. Done! Now you are ready to use the API Connector!

    Fill in all required parameters and set optional parameters if needed:

    SharepointOnlineDSN
    SharePoint Online
    User Credentials [OAuth]
    https://graph.microsoft.com/v1.0
    Required Parameters
    Authorization URL Fill-in the parameter...
    Token URL Fill-in the parameter...
    Client ID Fill-in the parameter...
    Scope Fill-in the parameter...
    Return URL Fill-in the parameter...
    Default Site Id (select after pressing 'Generate Token') Fill-in the parameter...
    Optional Parameters
    Client Secret
    Default Drive Id (select after pressing 'Generate Token')
    Login Prompt Option
    RetryMode RetryWhenStatusCodeMatch
    RetryStatusCodeList 429|503|423
    RetryCountMax 5
    RetryMultiplyWaitTime True
    Search Option For Non-Indexed Fields (Default=Blank - Search Only Indexed)
    Extra Headers (e.g. Header1:AAA||Header2:BBB)
    IsAppCred 0
    ODBC DSN Oauth Connection Configuration

    Application-only access is broader and more powerful than delegated access (User Credentials), so you should only use app-only access where needed. Use it when: 1. The application needs to run in an automated way, without user input (for example, a daily script that checks emails from certain contacts and sends automated responses). 2. The application needs to access resources belonging to multiple different users (for example, a backup or data loss prevention app might need to retrieve messages from many different chat channels, each with different participants). 3. You find yourself tempted to store credentials locally and allow the app to sign in 'as' the user or admin. [API reference]

    Steps how to get and use SharePoint Online credentials

    Follow these simple steps to create Microsoft Entra ID application with application access permissions:

    • Create an OAuth app

    • Grant application SharePoint Online permissions (optional, for granular permissions)

      This step allows to grant OAuth application granular permissions, i.e. access configured specific Sites, Lists, and List Items.

    Step-1: Create OAuth app

    1. Navigate to the Azure Portal and log in using your credentials.
    2. Access Microsoft Entra ID.
    3. Register a new application by going to App registrations and clicking on New registration button: Start new app registration in Microsoft Entra ID
      INFO: Find more information on how to register an application in Graph API reference.
    4. When configuration window opens, configure these fields:

      • Supported account type
        • e.g. select Accounts in this organizational directory only if you need access to data in your organization only.
      • Redirect URI:
        • Set the type to Public client/native (mobile & desktop).
        • Leave the URL field empty.
      Register app in Microsoft Entra ID
    5. After registering the app, copy the Application (client) ID for later:

      Copy client ID of Microsoft Entra ID app
    6. Then copy OAuth authorization endpoint (v2) & OAuth token endpoint (v2) URLs:

      Copy Auth and Token URLs in Microsoft Entra ID app
    7. Continue and create Client secret:

      Add Client secret for Microsoft Entra ID app
    8. Then copy the Client secret for later steps:

      Copy Client secret
    9. Continue by adding permissions for the app by going to the API permissions section, and clicking on Add a permission:

      Start adding permissions to Microsoft Entra ID app
    10. Select Microsoft Graph:

      Select Graph API permissions for Microsoft Entra ID app
    11. Then choose Application permissions option:

      Select app permissions for Microsoft Entra ID app
    12. Continue by adding these Sites permissions (search for site):

      Select SharePoint Online application scopes
      INFO: If you want to access specific lists or list items (table-level vs row-level security) rather than the full site, then add Lists.SelectedOperations.Selected or ListItems.SelectedOperations.Selected permissions , just like in the previous step (search for list).
      WARNING: If you add any of these permissions - Sites.Selected, Lists.SelectedOperations.Selected, or ListItems.SelectedOperations.Selected - you must grant the app the SharePoint permissions for the specific resource (e.g. a Site, a List, or a ListItem). Follow instructions in Grant SharePoint permissions to the OAuth app (optional) section on how to accomplish that.
    13. Finish by clicking Add permissions button:

      Add permissions to Microsoft Entra ID app
    14. Now it's time to Grant admin consent for your application:

      Grant admin consent for Microsoft Entra ID app
    15. Confirm all the permissions are granted:

      Admin consent granted successfully in Entra ID
    16. Now go to SSIS package or ODBC data source and use the copied values in Application Credentials authentication configuration:

      • In the Token URL field paste the OAuth token endpoint (v2) URL value you copied in the previous step.
      • In the Client ID field paste the Application (client) ID value you copied in the previous step.
      • In the Client Secret field paste the Client secret value you copied in the previous step.
      • Optional step. Choose Default Site Id from the drop down menu.
    17. Click Test Connection to confirm the connection is working.
    18. Done!

    Step-2 (optional): Grant SharePoint permissions to the OAuth app (optional)

    If you used Sites.Selected, Lists.SelectedOperations.Selected or ListItems.SelectedOperations.Selected permission in the previous section, you must grant the app the SharePoint permissions for the specific resource (e.g. a Site, a List, or a ListItem). You can do it using PowerShell or SharePoint admin center (obsolete method).

    Granting SharePoint permissions using PowerShell

    Unfortunately, there is no user interface available to control these permissions yet. For now, granting permissions has to be accomplished via Microsoft Graph API [Microsoft reference]:

    You must be the owner of the resource to grant permissions (i.e. belong to SharePoint owners group or be the owner of the Site or List).
    1. Open PowerShell (run as admin).
    2. Call the following PowerShell code to grant read and write permission for the app we created earlier (assuming Application (client) ID is 89ea5c94-aaaa-bbbb-cccc-3fa95f62b66e):

      ##### CONFIGURATION ############################################################################################
      
      # More info at:
      # - https://learn.microsoft.com/en-us/graph/permissions-selected-overview?tabs=powershell
      # - https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.sites/?view=graph-powershell-1.0
      
      # Find SharePoint Site Id by following these steps:
      # - Login into SharePoint Online
      # - Open this URL https://{your-company}.sharepoint.com/_api/site in the browser
      #   NOTE: For a subsite use https://{your-company}.sharepoint.com/sites/{your-subsite}/_api/site
      # - Find 'Id' element in the response (e.g. <d:Id m:type="Edm.Guid">efcdd21a-aaaa-bbbb-cccc-5d8104d8b5e3</d:Id>)
      # - Copy the Site Id, i.e.: efcdd21a-aaaa-bbbb-cccc-5d8104d8b5e3 
      # Set $siteId variable to the retrieved Site Id:
      
      $siteId="efcdd21a-aaaa-bbbb-cccc-5d8104d8b5e3"
      
      
      # Find your Application Id (i.e. Client Id) in the Azure Portal, in App Registrations page:
      # https://portal.azure.com/#view/Microsoft_AAD_RegisteredApps/ApplicationsListBlade
      
      $applicationId="89ea5c94-aaaa-bbbb-cccc-3fa95f62b66e"
      
      
      # Set one of app permissions: read, write, fullcontrol, owner ('write' includes 'read' permission)
      
      $appPermission="write"
      
      
      
      ##### SCRIPT ###################################################################################################
      
      # Step-1: Install 'Microsoft.Graph.Sites' module if it's not installed
      if (-not (Get-Module Microsoft.Graph.Sites -ListAvailable))
      {
          Install-Module Microsoft.Graph.Sites
      }
      
      # Step-2: Load module
      Import-Module Microsoft.Graph.Sites
      
      # Step-3: Login (use Azure admin or SharePoint owner account)
      DisConnect-MgGraph
      Connect-MgGraph
      
      # Step-4: Set parameters for API call (set permissions, Site ID and Application ID)
      
      $params = @{
      	roles = @($appPermission)
      	grantedTo = @{
      		application = @{id = $applicationId}
      	}
      }
      
      # Step-5: Grant permissions
      New-MgSitePermission -SiteId $siteId -BodyParameter $params
      
      # Done!
      Write-Host "Granted SharePoint permissions to application '$applicationId' for site '$siteId'."
      
      
    3. That's it! Now you can use the API Connector!

    Granting SharePoint permissions using SharePoint admin center (obsolete method)

    If you used Site.Selected permission you can link it SharePoint site in SharePoint admin center [SharePoint reference]. Follow these simple steps to accomplish that:

    1. Log in to SharePoint admin center using this URL: (replace YOURCOMPANY with your company name):
      https://YOURCOMPANY-admin.sharepoint.com/_layouts/15/appinv.aspx
      INFO: To view all the registered apps in SharePoint, visit this page: https://YOURCOMPANY-admin.sharepoint.com/_layouts/15/appprincipals.aspx?Scope=Web.
    2. In the App Id field enter Application (client) ID you copied in the previous step.
    3. In the Permission Request XML field enter XML snippet which describes which SharePoint permissions you want to grant to the OAuth app, e.g.:

      <AppPermissionRequests AllowAppOnlyPolicy="true">
        <AppPermissionRequest Scope="http://sharepoint/content/tenant" Right="FullControl" />
      </AppPermissionRequests>
      INFO: This example gives app FullControl, but you can also grant it Read or Write permissions.
    4. Click Create to grant the permission to your OAuth app.
    5. That's it! Now you can use the API Connector!

    Fill in all required parameters and set optional parameters if needed:

    SharepointOnlineDSN
    SharePoint Online
    Application Credentials [OAuth]
    https://graph.microsoft.com/v1.0
    Required Parameters
    Token URL Fill-in the parameter...
    Client ID Fill-in the parameter...
    Client Secret Fill-in the parameter...
    Default Site Id Fill-in the parameter...
    Optional Parameters
    Scope https://graph.microsoft.com/.default
    Default Drive Id
    RetryMode RetryWhenStatusCodeMatch
    RetryStatusCodeList 429|503|423
    RetryCountMax 5
    RetryMultiplyWaitTime True
    Search Option For Non-Indexed Fields (Default=Blank - Search Only Indexed)
    Extra Headers (e.g. Header1:AAA||Header2:BBB)
    IsAppCred 1
    ODBC DSN Oauth Connection Configuration
    Steps how to get and use SharePoint Online credentials
    To use Certificate-Based Authentication Setup please follow the steps listed in [Application Credentials] authentication and once done come back here to finish next stsps.

    This guide walks you through setting up a certificate-based authentication flow for Microsoft Graph or other Azure AD protected APIs using client credentials and a JWT.

    Step 1: Generate a Self-Signed Certificate

    You can use OpenSSL or any other way to generate Certificate file but make it simple below example uses PowerShell. Open PowerShell and execute code listed in below steps.
    
    # Run this in PowerShell
    #Change .AddYears(1) to desired number. By default it expires certificate in one year as per below code.
    
    $cert = New-SelfSignedCertificate `
      -Subject "CN=MyClientAppCert" `
      -KeySpec Signature `
      -KeyExportPolicy Exportable `
      -KeyLength 2048 `
      -CertStoreLocation "Cert:\CurrentUser\My" `
      -KeyAlgorithm RSA `
      -HashAlgorithm SHA256 `
      -NotAfter (Get-Date).AddYears(1) `
      -Provider "Microsoft Enhanced RSA and AES Cryptographic Provider"
    
    # Export private key (.pfx)  - Keep this with you to make API calls (SECRET KEY - DONOT SHARE)
    $pfxPath = "$env:USERPROFILE\Desktop\private_key.pfx"
    $pwd = ConvertTo-SecureString -String "yourStrongPassword123" -Force -AsPlainText
    Export-PfxCertificate -Cert $cert -FilePath $pfxPath -Password $pwd
    
    # Export public certificate (.cer) - UPLOAD this to Azure Portal
    $cerPath = "$env:USERPROFILE\Desktop\public_key.cer"
    Export-Certificate -Cert $cert -FilePath $cerPath
    

    Step 2: Register or Configure an App in Azure AD

    1. Go to https://portal.azure.com
    2. Navigate to Azure Active Directory > App registrations
    3. Click + New registration or open an existing app
    4. Copy the Application (client) ID and Directory (tenant) ID

    Step 3: Upload the Certificate

    1. In your App Registration, go to Certificates & secrets
    2. Under Certificates, click Upload certificate
    3. Select the .cer file (public certificate)
    4. Click Add

    Step 4: Grant API Permissions

    1. Go to the API permissions tab
    2. Click Add a permission
    3. Select Microsoft Graph (or another API)
    4. Choose Application permissions
    5. Add scopes such as:
      • Sites.Read.All
      • Sites.ReadWrite.All
      • Files.Read.All
      • Files.ReadWrite.All
      • email
      • offline_access
      • openid
      • profile
      • User.Read
    6. Click Grant admin consent (requires admin)

    Step 5: Use PFX file

    Once both files generated perform the following steps to use PFX file., , Use the Certificate file (*.pfx) Now its time to use pfx file generated in the previous step. PFX file contains private key and public key both.
    1. On ZappySys Connection UI Go to Certificate Tab
    2. Change Storage Mode to Local PFX File (or you can Import PFX file in Certificate Storage - User Store / Machine Store and use that way)
    3. Supply the pfx file path or select certificate from Local Certificate Store if you imported that way in earlier step
    4. Supply the certificate password (same password used in earlier PowerShell script)
    5. Test connection see everything is good

    Fill in all required parameters and set optional parameters if needed:

    SharepointOnlineDSN
    SharePoint Online
    Application Credentials with Certificate (Sign JWT with Private Key) [OAuth]
    https://graph.microsoft.com/v1.0
    Required Parameters
    Token URL Fill-in the parameter...
    Client ID Fill-in the parameter...
    Certificate: *** Configure [Client Certificate] Tab *** Fill-in the parameter...
    Default Site Id Fill-in the parameter...
    Optional Parameters
    Default Drive Id
    RetryMode RetryWhenStatusCodeMatch
    RetryStatusCodeList 429|503|423
    RetryCountMax 5
    RetryMultiplyWaitTime True
    Search Option For Non-Indexed Fields (Default=Blank - Search Only Indexed)
    Extra Headers (e.g. Header1:AAA||Header2:BBB)
    IsAppCred 1
    ODBC DSN Oauth Connection Configuration

  6. Once the data source connection has been configured, it's time to configure the SQL query. Select the Preview tab and then click Query Builder button to configure the SQL query:

    ZappySys API Driver - SharePoint Online
    SharePoint Connector can be used to read, write data in SharePoint Online List / Document Library, perform file operations such as upload, download, create, move, delete, rename in a few clicks!
    SharepointOnlineDSN
    Open Query Builder in API ODBC Driver to read and write data to REST API
  7. Start by selecting the Table or Endpoint you are interested in and then configure the parameters. This will generate a query that we will use in C# to retrieve data from SharePoint Online. Hit OK button to use this query in the next step.

    SELECT * FROM Lists
    Configure table/endpoint parameters in ODBC data source based on API Driver
    Some parameters configured in this window will be passed to the SharePoint Online API, e.g. filtering parameters. It means that filtering will be done on the server side (instead of the client side), enabling you to get only the meaningful data much faster.
  8. Now hit Preview Data button to preview the data using the generated SQL query. If you are satisfied with the result, use this query in C#:

    ZappySys API Driver - SharePoint Online
    SharePoint Connector can be used to read, write data in SharePoint Online List / Document Library, perform file operations such as upload, download, create, move, delete, rename in a few clicks!
    SharepointOnlineDSN
    SELECT * FROM Lists
    API ODBC Driver-based data source data preview
    You can also access data quickly from the tables dropdown by selecting <Select table>.
    A WHERE clause, LIMIT keyword will be performed on the client side, meaning that the whole result set will be retrieved from the SharePoint Online API first, and only then the filtering will be applied to the data. If possible, it is recommended to use parameters in Query Builder to filter the data on the server side (in SharePoint Online servers).
  9. Click OK to finish creating the data source.

Video Tutorial

Read data in C#

Using ODBC DSN

  1. Create a new Console project and use this code to read the data:

    "SharepointOnlineDSN";
    Make ZappySys Driver call in c#

  2. Press F5 to run the code and read the data:
    ZappySys Driver Output in c#

  3. Here is the code in text format:

    using System;
    using System.Data.Odbc;
    
    namespace ConsoleApp {
        class Program {
            static void Main() {
                var dsn = "SharepointOnlineDSN";
                using (var conn = new OdbcConnection(String.Format("DSN={0}", dsn)))
                {
                    conn.Open();
                    var cmd = new OdbcCommand("SELECT * FROM Products", conn);
                    
                    //Increase the timeout duration from the default 30 seconds, which may be insufficient in certain scenarios
                    cmd.CommandTimeout=600; // 600-Seconds
                    
                    var rdr = cmd.ExecuteReader();
                    while (rdr.Read())
                    {
                        for (int i = 0; i < rdr.FieldCount; i++)
                        {
                                Console.Write("{0}\t", rdr[i]);
                        }
                        Console.WriteLine();
                    }
                }
                Console.ReadKey();
            }
        }
    }
    

Using a full ODBC connection string

If you want to avoid being dependent on a DSN and creating multiple DSNs for each platform (x86, x64), then you can use a fully qualified connection string. Simply go to your DSN and copy the Connection String:

  1. Open ODBC data source configuration and click Copy settings:
    ZappySys API Driver - Configuration [Version: 2.0.1.10418]
    ZappySys API Driver - SharePoint Online
    SharePoint Connector can be used to read, write data in SharePoint Online List / Document Library, perform file operations such as upload, download, create, move, delete, rename in a few clicks!
    SharepointOnlineDSN
    Copy connection string for ODBC application
  2. The window opens, telling us the connection string was successfully copied to the clipboard: Successful connection string copying for ODBC application
  3. Then in your C# code, pass the connection string as an argument when calling the OdbcConnection object's constructor, for example:

    var connectionString = @"DRIVER={ZappySys API Driver};ServiceUrl=https://graph.microsoft.com/v1.0;Provider=Custom;OAuthVersion=OAuth2;ScopeSeparator={space};GrantType=Default;Scope=[$Scope$];ScopeSeparator={space};ContentType=application/x-www-form-urlencoded;";
    
    using (var conn = new OdbcConnection(connectionString))
    {
        // your code goes here
    }

Limitations of using a full connection string

Despite using a full ODBC connection string may be very convenient it comes with a limitation: it's length is limited to 1024 symbols (or sometimes more). It usually happens when API provider generates a very long Refresh Token when OAuth is at play. If you are using such a long ODBC connection string, you may get this error:

"Connection string exceeds maximum allowed length of 1024"

But there is a solution to this by storing the full connection string in a file. Follow the steps below to achieve this:

  1. Open your ODBC data source.
  2. Click Copy settings button to copy a full connection string (see the previous section on how to accomplish that).
  3. Then create a new file, let's say, in C:\temp\odbc-connection-string.txt.
  4. Continue by pasting the copied connection string into a newly created file and save it.
  5. Finally, the last step! Just construct a shorter ODBC connection string using this format:
    DRIVER={ZappySys API Driver};SettingsFile=C:\temp\odbc-connection-string.txt
  6. Our troubles are over! Now you should be able to use this connection string in C# with no problems.
This feature requires ODBC PowerPack v1.9.0 or later.

Actions supported by SharePoint Online Connector

Learn how to perform common SharePoint Online actions directly in C# with these how-to guides:

Conclusion

In this article we showed you how to connect to SharePoint Online in C# and integrate data without any coding, saving you time and effort. It's worth noting that ZappySys API Driver allows you to connect not only to SharePoint Online, but to any Java application that supports JDBC (just use a different JDBC driver and configure it appropriately).

We encourage you to download SharePoint Online Connector for C# and see how easy it is to use it for yourself or your team.

If you have any questions, feel free to contact ZappySys support team. You can also open a live chat immediately by clicking on the chat icon below.

Download SharePoint Online Connector for C# Documentation

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  • How to connect SharePoint Online in C#?

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  • Integration SharePoint Online in C#

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  • Consume real-time SharePoint Online API data in C#

  • SharePoint Online ODBC Driver | ODBC Driver for SharePoint Online | ODBC SharePoint Online Driver | SSIS SharePoint Online Source | SSIS SharePoint Online Destination

  • Connect SharePoint Online in C#

  • Load SharePoint Online in C#

  • Load SharePoint Online data in C#

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