🛠 Setting Up SharePoint Integration in ASP.NET 8
To get started, you’ll need:
- ASP.NET 8 application
- SharePoint Online (or On-Premises SharePoint Server)
- Microsoft Graph API or SharePoint CSOM (Client-Side Object Model)
🔧 1. Install Required NuGet Packages
Install the required packages in your ASP.NET 8 project:
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| dotnet add package Microsoft.Graph
dotnet add package Microsoft.SharePointOnline.CSOM
dotnet add package Microsoft.Identity.Client
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📂 2. Connect to SharePoint Using Microsoft Graph API
Graph API is the recommended way to interact with SharePoint Online.
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| using Microsoft.Graph;
using Microsoft.Identity.Client;
var tenantId = "your-tenant-id";
var clientId = "your-client-id";
var clientSecret = "your-client-secret";
var confidentialClient = ConfidentialClientApplicationBuilder
.Create(clientId)
.WithClientSecret(clientSecret)
.WithAuthority($"https://login.microsoftonline.com/{tenantId}")
.Build();
var graphClient = new GraphServiceClient(new DelegateAuthenticationProvider(async (requestMessage) =>
{
var authResult = await confidentialClient.AcquireTokenForClient(new[] { "https://graph.microsoft.com/.default" }).ExecuteAsync();
requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
}));
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📁 3. Upload a File to SharePoint
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| var siteId = "your-site-id";
var filePath = "path-to-your-file.pdf";
var fileBytes = System.IO.File.ReadAllBytes(filePath);
using var stream = new MemoryStream(fileBytes);
await graphClient.Sites[siteId].Drive.Root.ItemWithPath("Documents/sample.pdf")
.Content
.Request()
.PutAsync<DriveItem>(stream);
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📜 4. List Files in a SharePoint Library
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| var driveItems = await graphClient.Sites["your-site-id"].Drive.Root.Children.Request().GetAsync();
foreach (var item in driveItems)
{
Console.WriteLine($"Name: {item.Name}, ID: {item.Id}");
}
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🔄 5. Download a File From SharePoint
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| var fileStream = await graphClient.Sites["your-site-id"].Drive.Items["file-id"].Content.Request().GetAsync();
using var file = new FileStream("downloaded-file.pdf", FileMode.Create, FileAccess.Write);
await fileStream.CopyToAsync(file);
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| var file = await graphClient.Sites["your-site-id"].Drive.Items["file-id"].Request().GetAsync();
Console.WriteLine($"Name: {file.Name}, Last Modified: {file.LastModifiedDateTime}");
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🔄 7. Create a SharePoint List Item
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| var newItem = new ListItem
{
Fields = new FieldValueSet
{
AdditionalData = new Dictionary<string, object>
{
{"Title", "New Task"},
{"Status", "In Progress"}
}
}
};
await graphClient.Sites["your-site-id"].Lists["list-id"].Items.Request().AddAsync(newItem);
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🗑 8. Delete a File in SharePoint
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| await graphClient.Sites["your-site-id"].Drive.Items["file-id"].Request().DeleteAsync();
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🔑 9. Set Permissions on a File
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| var permission = new Permission
{
Roles = new List<string> { "read" },
GrantedTo = new IdentitySet
{
User = new Identity { Id = "user-id", DisplayName = "John Doe" }
}
};
await graphClient.Sites["your-site-id"].Drive.Items["file-id"].Permissions.Request().AddAsync(permission);
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📩 10. Send a SharePoint Notification (Webhook)
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| var subscription = new Subscription
{
ChangeType = "updated",
NotificationUrl = "https://your-api.com/webhook",
Resource = "sites/your-site-id/lists/list-id",
ExpirationDateTime = DateTime.UtcNow.AddHours(1),
ClientState = "your-client-state"
};
await graphClient.Subscriptions.Request().AddAsync(subscription);
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