处理存储在 SharePoint Online 中的文档
Microsoft SharePoint Online 是基于 Web 的技术的集合,使组织可以轻松存储、共享和管理数字信息。您可以使用我们强大的 .NET Aspose.Words 来处理 SharePoint 中"共享文档"文件夹中存储的文档。
在本文中,我们将介绍将上传到"共享文档"文件夹的文档转换为 PDF 格式并将生成的文档上传回该文件夹的常见场景。
预设
1.加入Microsoft 365 开发者计划 2. 设置即时沙箱 根据视频教程 3. 为 SharePoint Online 创建基于应用程序的凭据,如 设置具有租户权限的仅限应用程序的主体 中详述 4. 将名为"TestDoc.docx"的文档上传到根通信站点的"共享文档"文件夹中 5.购买Aspose.Words许可证,或使用许可和订阅
SharePoint
Online 根通信站点,则跳过步骤 1-2。
创建控制台应用程序
要评估 Aspose.Words for .NET 如何处理 SharePoint 文档,您需要创建一个具有适当设置的控制台应用程序,并实现从"共享文档"文件夹下载文档、处理该文档,然后将此文件上传到同一文件夹的逻辑。为此,请按照本节中描述的说明进行操作。
要执行指令,您需要找到并修复以下参数的值,完成"预设"部分中的步骤后即可使用这些参数:
- 租户标识符 – 请参阅 如何找到您的租户 ID
- 租户姓名
- 客户标识符
- 客户秘密
创建一个新的控制台应用程序项目
要创建新的控制台应用程序项目,请执行以下步骤:
- 在 Visual Studio 中,为 C# 语言和目标框架 .NET 6 创建一个名为"SPOnlineExample"的新控制台应用程序项目
- 添加以下包:
Microsoft.Extensions.Configuration.Json
- Aspose.Words
添加配置文件
要添加配置文件,请按照下列步骤操作:
1.在项目中添加一个"appsettings.json"文件; 2. 在文件中添加以下内容: JSON
{
"TenantId": "Your tenant id.",
"TenantName": "Your tenant name.",
"ClientSecret": "App client secret.",
"ClientId": "App client id.",
"AsposeWordsLicensePath": "Path to your Aspose.Words license."
}
- 使用您的自定义值填写字段。
添加 SharePoint 在线 REST API 客户端
在项目中创建文件"SPOClient.cs"并填充以下内容:
.NET
using System.Net.Http.Json;
using System.Net.Http.Headers;
using System.Security.Authentication;
using System.Text.Json.Serialization;
using Microsoft.Extensions.Configuration;
namespace SPOnlineExample
{
/// <summary>
/// Sharepoint online REST API client.
/// </summary>
internal class SPOClient
{
private readonly string authUrl;
private readonly string clientId;
private readonly string resource;
private readonly string tenantId;
private readonly HttpClient client;
private readonly string tenantName;
private readonly string clientSecret;
private const string grandType = "client_credentials";
private const string resourceId = "00000003-0000-0ff1-ce00-000000000000";
// URL templates.
private static readonly string authUrlTemplate = "https://accounts.accesscontrol.windows.net/{0}/tokens/OAuth/2";
private static readonly string downloadfileTemplate = "https://{0}.sharepoint.com/_api/web/GetFileByServerRelativeUrl('{1}')/$value";
private static readonly string uploadfileTemplate =
"https://{0}.sharepoint.com/_api/web/GetFolderByServerRelativeUrl('{1}')/Files/add(url='{2}',overwrite=true)";
// Access token.
private string token = string.Empty;
public SPOClient(IConfigurationRoot appConfig)
{
tenantId = appConfig[nameof(tenantId)];
clientSecret = appConfig[nameof(clientSecret)];
tenantName = appConfig[nameof(tenantName)];
authUrl = string.Format(authUrlTemplate, tenantId);
clientId = $"{appConfig[nameof(clientId)]}@{tenantId}";
resource = $"{resourceId}/{tenantName}.sharepoint.com@{tenantId}";
client = new HttpClient();
}
public async Task Authorize()
{
var formContent = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("grant_type", grandType),
new KeyValuePair<string, string>("client_id", clientId),
new KeyValuePair<string, string>("client_secret", clientSecret),
new KeyValuePair<string, string>("resource", resource)
});
var response = await client.PostAsync(authUrl, formContent);
var responseData = await response.Content.ReadFromJsonAsync<AuthRespose>();
if (!response.IsSuccessStatusCode | | responseData == null)
throw new AuthenticationException(responseData?.Description);
token = responseData.Token;
}
public async Task<Stream> DownloadFile(string relativeFilePath)
{
var url = string.Format(downloadfileTemplate, tenantName, relativeFilePath);
using var request = CreateRequest(url, HttpMethod.Get);
var response = await client.SendAsync(request);
if (!response.IsSuccessStatusCode)
{
var errorData = await response.Content.ReadAsStringAsync();
throw new Exception(errorData);
}
var fileStream = await response.Content.ReadAsStreamAsync();
return fileStream;
}
public async Task UploadFile(string relativeFolderPath, string fileName, Stream fileData)
{
var url = string.Format(uploadfileTemplate, tenantName, relativeFolderPath, fileName);
using var request = CreateRequest(url, HttpMethod.Post);
request.Headers.Add("IF-MATCH", "*"); // Overwrite any changes.
request.Content = new StreamContent(fileData);
var response = await client.SendAsync(request);
if (!response.IsSuccessStatusCode)
{
var errorData = await response.Content.ReadAsStringAsync();
throw new Exception(errorData);
}
}
private HttpRequestMessage CreateRequest(string url, HttpMethod httpMethod)
{
var request = new HttpRequestMessage(httpMethod, url);
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);
return request;
}
private class AuthRespose
{
public string Error { get; set; } = string.Empty;
[JsonPropertyName("error_description")]
public string Description { get; set; } = string.Empty;
[JsonPropertyName("access_token")]
public string Token { get; set; } = string.Empty;
}
}
}
将场景逻辑添加到程序中
将以下内容移动到"Program.cs"文件中:
.NET
using Aspose.Words;
using Aspose.Words.Saving;
using Microsoft.Extensions.Configuration;
namespace SPOnlineExample
{
public static class Program
{
static async Task Main(string[] args)
{
// The example below downloads the file "testdoc.docx" from the shared documents folder.
// Converts it to PDF and uploads conversion result to the same folder.
var appConfig = GetAppConfig();
var client = new SPOClient(appConfig);
await client.Authorize();
var fileStream = await client.DownloadFile("/Shared%20Documents/TestDoc.docx");
var lic = new License();
lic.SetLicense(appConfig["AsposeWordsLicensePath"]);
var doc = new Document(fileStream);
using var outputStream = new MemoryStream();
var saveOptions = new PdfSaveOptions();
doc.Save(outputStream, saveOptions);
await client.UploadFile("/Shared%20Documents", "TestDoc.pdf", outputStream);
Console.WriteLine("Done. Press any key to complete.");
Console.ReadKey();
}
private static IConfigurationRoot GetAppConfig()
{
// Build configuration
return JsonConfigurationExtensions.AddJsonFile(
new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()),
"appsettings.json")
.Build();
}
}
}
执行创建的示例并检查结果
最后,运行创建的示例并检查得到的结果:
1.编译工程 2. 运行控制台应用程序
因此,“TestDoc.pdf"文件应放置在根通信站点的"共享文档"文件夹中。
也可以看看
- 文章 渲染 了解有关固定页面和流程布局格式的更多信息
- 有关页面布局的更多信息,请参阅 转换为固定页面格式 文章
- 有关使用 PdfSaveOptions 类的更多信息,请参阅 转换为 PDF 时指定渲染选项 文章