C＃使用REST API将项目添加到Sharepoint列表

Question

我想使用以下代码将项目添加到共享点的列表中：

protected string httpGetPost(string getPostMode, string url, string dataToPost = "")
{
    HttpWebRequest endpointRequest = (HttpWebRequest)WebRequest.Create(url);
    endpointRequest.Method = getPostMode;

    var credentialCache = new CredentialCache();
    credentialCache.Add(
      new Uri(endpointRequest.RequestUri.GetLeftPart(UriPartial.Authority)), // request url's host
      "Digest",  // authentication type 
      new NetworkCredential(userName, password) // credentials 
    );
    endpointRequest.Credentials = credentialCache;

    endpointRequest.Accept = "application/json;odata=verbose";
    endpointRequest.ContentType = "application/json;odata=verbose";

    if (!string.IsNullOrEmpty(dataToPost))
    {
        using (Stream dataStream = endpointRequest.GetRequestStream())
        {
            byte[] bs = Encoding.ASCII.GetBytes(dataToPost);
            dataStream.Write(bs, 0, bs.Length);
        }
    }
    using (var resp = endpointRequest.GetResponse())
    {
        var html = new StreamReader(resp.GetResponseStream()).ReadToEnd();
        return html;
    }
}

并使用以下代码调用上述方法：

httpGetPost("POST", url, "{\"__metadata\": { \"type\": \"SP.Data.Test_x0020_ListListItem\" }, \"Title\": \"Test\", \"Column B\", \"BBB\"}");

这是我要发布的数据：

{“ __metadata”：{“ type”：“ SP.Data.Test_x0020_ListListItem”}，“ Title”：“ Test”，“ B列”，“ BBB”}

我看过这个网站https://msdn.microsoft.com/en-us/library/office/dn292552.aspx ，但是授权不同，它使用的是访问令牌，但这是问题所在：

在此网站中： http://sharepoint.stackexchange.com/questions/69617/sharepoint-2013-oauth-url-to-get-token ://sharepoint.stackexchange.com/questions/69617/sharepoint-2013-oauth-url-to-get-token，它说我无法获取访问令牌，因此我使用用户名和密码登录共享点，但这又带来了另一个问题：

var resp = endpointRequest.GetResponse()引发了System.Net.WebException ，错误是说The remote server returned an error: (403) Forbidden.

该帐户是域管理员和共享点管理员。

为什么我仍然收到403错误？

由于某些原因，我只能使用REST API与共享点进行通信。

Answer 1

这是实现目标的略有不同的方法。 在此示例中，某些对象特定于Store Apps，但是在标准应用程序中，它们可以很容易地用其他值替换。

 public string digest()
 {
 String retVal = "";
 try
 {
 string url = "https://YourSite.com/";
 HttpClient client = new HttpClient(new HttpClientHandler() { UseDefaultCredentials = true });
 client.BaseAddress = new System.Uri(url);
 string cmd = "_api/contextinfo";
 client.DefaultRequestHeaders.Add("Accept", "application/json;odata=verbose");
 client.DefaultRequestHeaders.Add("ContentType", "application/json");
 client.DefaultRequestHeaders.Add("ContentLength", "0");
 StringContent httpContent = new StringContent("");
 var response = client.PostAsync(cmd, httpContent).Result;
 if (response.IsSuccessStatusCode)
 {
 string content = response.Content.ReadAsStringAsync().Result;
 JsonObject val = JsonValue.Parse(content).GetObject();
 JsonObject d = val.GetNamedObject("d");
 JsonObject wi = d.GetNamedObject("GetContextWebInformation");
 retVal = wi.GetNamedString("FormDigestValue");
 }
 }
 catch
 { }
 return retVal;
 }

 FileOpenPicker picker = new FileOpenPicker();
 picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
 picker.ViewMode = PickerViewMode.Thumbnail;
 // Filter to include a sample subset of file types.
 picker.FileTypeFilter.Clear();
 picker.FileTypeFilter.Add(".bmp");
 picker.FileTypeFilter.Add(".png");
 picker.FileTypeFilter.Add(".jpeg");
 picker.FileTypeFilter.Add(".jpg");
 // Open the file picker.
 StorageFile path = await picker.PickSingleFileAsync();
 if (path != null)
 {
 string url = "https://YourSite.com/Subsite/";
 HttpClient client = new HttpClient(new HttpClientHandler() { UseDefaultCredentials = true });
 client.BaseAddress = new System.Uri(url);
 client.DefaultRequestHeaders.Clear();
 client.DefaultRequestHeaders.Add("Accept", "application/json;odata=verbose");
 client.DefaultRequestHeaders.Add("X-RequestDigest", digest());
 client.DefaultRequestHeaders.Add("X-HTTP-Method", "POST");
 client.DefaultRequestHeaders.Add("binaryStringRequestBody", "true");
 IRandomAccessStream fileStream = await path.OpenAsync(FileAccessMode.Read);
 var reader = new DataReader(fileStream.GetInputStreamAt(0));
 await reader.LoadAsync((uint)fileStream.Size);
 Byte[] content = new byte[fileStream.Size];
 reader.ReadBytes(content);
 ByteArrayContent file = new ByteArrayContent(content);
 HttpResponseMessage response = await client.PostAsync("_api/web/lists/getByTitle(@TargetLibrary)/RootFolder/Files/add(url=@TargetFileName,overwrite='true')?@TargetLibrary='Project Photos'&@TargetFileName='TestUpload.jpg'", file);
 response.EnsureSuccessStatusCode();
 if (response.IsSuccessStatusCode)
 { }
 }