OneDrive下载文件的服务,用.net framework4.5.2
时间: 2023-11-21 13:04:07 浏览: 30
你可以使用 Microsoft Graph API 来下载 OneDrive 中的文件。这个API可以用于 .NET Framework 4.5.2 及以上版本,可以通过 NuGet 包管理器安装。以下是一个简单的示例代码:
```csharp
using Microsoft.Graph;
using Microsoft.Identity.Client;
using System.IO;
using System.Threading.Tasks;
public class OneDriveService
{
private readonly string clientId;
private readonly string[] scopes;
private readonly string redirectUri;
private readonly IPublicClientApplication publicClientApplication;
private readonly GraphServiceClient graphClient;
public OneDriveService(string clientId, string[] scopes, string redirectUri)
{
this.clientId = clientId;
this.scopes = scopes;
this.redirectUri = redirectUri;
publicClientApplication = PublicClientApplicationBuilder
.Create(clientId)
.WithRedirectUri(redirectUri)
.Build();
graphClient = new GraphServiceClient(new DelegateAuthenticationProvider(
async (requestMessage) =>
{
var authResult = await GetAccessTokenAsync();
requestMessage.Headers.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", authResult.AccessToken);
}));
}
public async Task<Stream> DownloadFileAsync(string itemId)
{
var response = await graphClient.Me.Drive.Items[itemId].Content.Request().GetAsync();
return response.Content;
}
private async Task<AuthenticationResult> GetAccessTokenAsync()
{
var accounts = await publicClientApplication.GetAccountsAsync();
var result = await publicClientApplication.AcquireTokenSilent(scopes, accounts.FirstOrDefault()).ExecuteAsync();
return result;
}
}
```
在使用这个服务之前,你需要先注册一个 Azure 应用程序,并在应用程序中添加 OneDrive API 的权限。然后,在调用服务之前,你需要获取授权令牌(token)。这个示例代码中使用 Microsoft.Identity.Client 库来获取授权令牌,你需要提供应用程序的客户端 ID、权限范围和重定向 URI。