我可以通过以下参考使用API从Google云端硬盘获取文件：Display (View) list of files from Google Drive using Google Drive API in ASP.Net with C# and VB.Net 。
但我只收到100条记录。我有成千上万的记录。任何人都可以让我知道要改变什么来获得完整的记录显示。
请找到以下代码：
namespace GoogleDrive
{
public partial class gDrive : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
GoogleConnect.ClientId = "942196220502-k107l4mtn6n606d8m38pp2k6clfmbftd.apps.googleusercontent.com";
GoogleConnect.ClientSecret = "oJxTZ2Bw9QfOlrc7KgxsEf9o";
GoogleConnect.RedirectUri = Request.Url.AbsoluteUri.Split('?')[0];
GoogleConnect.API = EnumAPI.Drive;
if (!string.IsNullOrEmpty(Request.QueryString["code"]))
{
string code = Request.QueryString["code"];
string json = GoogleConnect.Fetch("me", code);
GoogleDriveFiles files = new JavaScriptSerializer().Deserialize<GoogleDriveFiles>(json);
gv1.DataSource = files.Items.Where(i => i.Labels.Trashed == false);
gv1.DataBind();
}
else if (Request.QueryString["error"] == "access_denied")
{
ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "alert('Access denied.')", true);
}
else
{
GoogleConnect.Authorize("https://www.googleapis.com/auth/drive.readonly");
}
}
public class GoogleDriveFiles
{
public List<GoogleDriveFile> Items { get; set; }
}
public class GoogleDriveFile
{
public string Id { get; set; }
public string Title { get; set; }
public string OriginalFilename { get; set; }
public string ThumbnailLink { get; set; }
public string IconLink { get; set; }
public string WebContentLink { get; set; }
public DateTime CreatedDate { get; set; }
public DateTime ModifiedDate { get; set; }
public GoogleDriveFileLabel Labels { get; set; }
public string alternateLink { get; set; }
public Boolean editable { get; set; }
}
public class GoogleDriveFileLabel
{
public bool Starred { get; set; }
public bool Hidden { get; set; }
public bool Trashed { get; set; }
public bool Restricted { get; set; }
public bool Viewed { get; set; }
}
}
}
以下代码适用于获取前1000条记录。
namespace gDrive
{
class Program
{
static string[] Scopes = { DriveService.Scope.DriveReadonly };
static string ApplicationName = "Drive API .NET Quickstart";
static void Main(string[] args)
{
UserCredential credential;
gDriveTableAdapter gDrive = new gDriveTableAdapter();
using (var stream =
new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
string credPath = System.Environment.GetFolderPath(
System.Environment.SpecialFolder.Personal);
credPath = Path.Combine(credPath, ".credentials/drive-dotnet-quickstart.json");
credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
Scopes,
"user",
CancellationToken.None,
new FileDataStore(credPath, true)).Result;
//Console.WriteLine("Credential file saved to: " + credPath);
}
// Create Drive API service.
var service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = ApplicationName,
});
// Define parameters of request.
FilesResource.ListRequest listRequest = service.Files.List();
listRequest.PageSize = 1000;
listRequest.Fields = "nextPageToken, files(webViewLink, name)";
// List files.
IList<Google.Apis.Drive.v3.Data.File> files = listRequest.Execute()
.Files;
Console.WriteLine("Processing...\n");
if (files != null && files.Count > 0)
{
foreach (var file in files)
{
gDrive.InsertQuery(file.Name, file.WebViewLink);
}
Console.WriteLine(files.Count + " records fetched.");
}
else
{
Console.WriteLine("No files found.");
}
Console.Read();
}
}
}
答案 0 :(得分：4)
您似乎正在使用Google Drive api V2。如果将maxResults参数设置为1000，则将返回前1000行。如果有其他行page Token作为回复的一部分返回。您需要发送另一个请求并将pageToken添加到新请求中，这将返回下一次发送的数据。我不熟悉那个库，所以无法帮助你改变代码。
注意：您所关注的教程是从2014开始的，它不使用最新版本的Google Drive API which is V3。您也没有使用官方Google .Net client library。
更新：
这是我列出Google Drive API的所有文件方法。它显示了如何创建页面流转化器并返回所有文件的完整列表。注意：它将继续请求数据，直到您的Google驱动器上没有更多数据。我不负责吃你的配额：）
public class FilesListOptionalParms
{
/// The source of files to list.
public string Corpus { get; set; }
/// A comma-separated list of sort keys. Valid keys are 'createdTime', 'folder', 'modifiedByMeTime', 'modifiedTime', 'name', 'quotaBytesUsed', 'recency', 'sharedWithMeTime', 'starred', and 'viewedByMeTime'. Each key sorts ascending by default, but may be reversed with the 'desc' modifier. Example usage: ?orderBy=folder,modifiedTime desc,name. Please note that there is a current limitation for users with approximately one million files in which the requested sort order is ignored.
public string OrderBy { get; set; }
/// The maximum number of files to return per page.
public int PageSize { get; set; }
/// The token for continuing a previous list request on the next page. This should be set to the value of 'nextPageToken' from the previous response.
public string PageToken { get; set; }
/// A query for filtering the file results. See the "Search for Files" guide for supported syntax.
public string Q { get; set; }
/// A comma-separated list of spaces to query within the corpus. Supported values are 'drive', 'appDataFolder' and 'photos'.
public string Spaces { get; set; }
}
/// <summary>
/// Lists or searches files.
/// Documentation https://developers.google.com/drive/v3/reference/files/list
/// Generation Note: This does not always build correctly. Google needs to standardize things I need to figure out which ones are wrong.
/// </summary>
/// <param name="service">Authenticated Drive service. </param>
/// <param name="optional">The optional parameters. </param>
/// <returns>FileListResponse</returns>
public static Google.Apis.Drive.v3.Data.FileList ListAll(DriveService service, FilesListOptionalParms optional = null)
{
try
{
// Initial validation.
if (service == null)
throw new ArgumentNullException("service");
// Building the initial request.
var request = service.Files.List();
// Applying optional parameters to the request.
request = (FilesResource.ListRequest)SampleHelpers.ApplyOptionalParms(request, optional);
var pageStreamer = new Google.Apis.Requests.PageStreamer<Google.Apis.Drive.v3.Data.File, FilesResource.ListRequest, Google.Apis.Drive.v3.Data.FileList, string>(
(req, token) => request.PageToken = token,
response => response.NextPageToken,
response => response.Files);
var allFiles = new Google.Apis.Drive.v3.Data.FileList();
allFiles.Files = new List<Google.Apis.Drive.v3.Data.File>();
foreach (var result in pageStreamer.Fetch(request))
{
allFiles.Files.Add(result);
}
return allFiles;
}
catch (Exception Ex)
{
throw new Exception("Request Files.List failed.", Ex);
}
}
从我的项目中删除的可选参数：Unofficial Drive sample 列出从我的要点中删除的所有文件：gist