如何在Windows Store App中使用C＃通過REST API從Sharepoint圖像庫（列表）檢索圖像文件

Question

我正在構建Windows Store應用程序，必須從SharePoint 2013網站上載和下載圖像。 我嘗試了REST API，但所獲得的只是包含文件屬性的XML數據，但我無法獲取實際文件。 有人可以幫我嗎？

以下是我嘗試使用的代碼：

HttpClientHandler handler = new HttpClientHandler();
handler.UseDefaultCredentials = false;
handler.Credentials = new NetworkCredential(userName, password, domain);

HttpClient client = new HttpClient(handler);
client.DefaultRequestHeaders.Add("Accept", "application/atom+xml");
client.DefaultRequestHeaders.Add("ContentType", "application/atom+xml;type=entry");

var response = await client.GetAsync("server/site/_api/web/ListName/Items(1)/File");
Byte[] bArray = await response.Content.ReadAsByteArrayAsync();

Answer 1

下面的示例演示如何從庫中檢索特定的文件內容：

url: http://site url/_api/web/lists/getbytitle('<list title>')/items(<item id>)/File/$value
method: GET
headers:
    Authorization: "Bearer " + accessToken

例

HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);

var response = client.GetAsync("https://tenant.sharepoint.com/_api/web/lists/getbytitle('Documents')/items(1)/File/$value", HttpCompletionOption.ResponseHeadersRead).Result;
var fileContent = response.Content.ReadAsByteArrayAsync().Result;

參考

使用REST處理文件夾和文件