[sharepoint]修改Item或者File的Author和Editor

最近项目中调用sharepoint rest api方式获取文件或者Item列表，而用的方式是通过证书请求，在上传文件，或者新建item的时候，默认的用户是在sharepoint端注册的用户，并不能满足需求，需要对其进行修改。因为注册的app，会将该注册的clientid和issurid对应的应用程序作为一个新的用户。关于注册的方式可以参考之前写的几篇文章。

sharepoint环境安装过程中几点需要注意的地方

Rest API的简单应用

rest api方式实现对文档库的管理

通过WebClient模拟post上传文件到服务器

WebHttpRequest在sharepoint文档库中的使用

[sharepoint]Rest api相关知识（转）

[sharepoint]根据用户名获取该用户的权限

[sharepoint]根据用户名获取该用户的权限

 ClientContext spContext = new ClientContext("http://xxx//xxxx/xxx");

 spContext.ExecutingWebRequest += spContext_ExecutingWebRequest;

 Web website = spContext.Web;

 spContext.Load(website);

 Microsoft.SharePoint.Client.File file = website.GetFileByServerRelativeUrl(serverReleativeUrl);

 ListItem item = file.ListItemAllFields;

 string loginName = @"i:0#.w|domain\" + _siteInfo.UserName;

 User user = spContext.Web.EnsureUser(loginName);

 item["Editor"] = user;

 item["Author"] = user;

 file.ListItemAllFields.Update();

 spContext.ExecuteQuery();

验证

 public void spContext_ExecutingWebRequest(object sender, WebRequestEventArgs e)

 HttpWebRequest webReq = e.WebRequestExecutor.WebRequest;

 TokenHelper.ClientId = _siteInfo.ClientId;

 TokenHelper.IssuerId = _siteInfo.IssureId;

 var accessToken = TokenHelper.GetS2SAccessTokenWithWindowsIdentity(new Uri(_siteInfo.AppUrl), null);

 webReq.Method = "Post";

 webReq.Accept = "application/json;odata=verbose";

 webReq.Headers.Add("Authorization", "Bearer " + accessToken);

 }

修改Item类似

 /// summary 

 /// 修改Item的作者和编辑者

 /// /summary 

 /// param name="siteInfo" /param 

 /// param name="itcode" /param 

 /// param name="itemId" /param 

 public static void UpdateItemAuthor(SiteInfo siteInfo, string itcode, int itemId)

 ClientContext spContext = new ClientContext(siteInfo.Url);

 spContext.ExecutingWebRequest += spContext_ExecutingWebRequest;

 Web web = spContext.Web;

 spContext.Load(web);

 spContext.ExecuteQuery();

 List lst = web.Lists.GetById(new Guid(siteInfo.ListId));

 spContext.Load(lst);

 spContext.ExecuteQuery();

 ListItem item = lst.GetItemById(itemId);

 string loginName = @"i:0#.w|lenovo\" + itcode;

 User user = web.EnsureUser(loginName);

 item["Author"] = user;

 item["Editor"] = user;

 item.Update();

 spContext.ExecuteQuery();

 }

在修改或者新建item或者File的时候需要先获取contextinfo

 /// summary 

 /// 获得contextinfo

 /// /summary 

 /// param name="siteInfo" /param 

 /// returns /returns 

 private static string GetContextInfo(SiteInfo siteInfo)

 HttpWebRequest contextInfoRequest = null;

 HttpWebResponse contextInfoEndpointResponse = null;

 StreamReader contextInfoStream = null;

 Uri hostWebUri = new Uri(siteInfo.Url);

 TokenHelper.ClientId = siteInfo.ClientId;

 TokenHelper.IssuerId = siteInfo.IssureId;

 var accessToken = TokenHelper.GetS2SAccessTokenWithWindowsIdentity(hostWebUri, null);

 //获取contextinfo

 contextInfoRequest = (HttpWebRequest)HttpWebRequest.Create(siteInfo.Url + "/_api/contextinfo");

 contextInfoRequest.Method = "POST";

 contextInfoRequest.Accept = "application/json;odata=verbose";

 contextInfoRequest.ContentLength = 0;

 contextInfoRequest.Headers.Add("Authorization", "Bearer " + accessToken);

 contextInfoEndpointResponse = (HttpWebResponse)contextInfoRequest.GetResponse();

 contextInfoStream = new StreamReader(contextInfoEndpointResponse.GetResponseStream(), Encoding.UTF8);

 string strContextInfoJson = contextInfoStream.ReadToEnd();

 return strContextInfoJson;

 catch (Exception ex)

 throw ex;

 finally

 if (contextInfoEndpointResponse != null)

 contextInfoEndpointResponse.Dispose();

 if (contextInfoStream != null)

 contextInfoStream.Dispose();

 }

如果在请求的时候能带上账户信息，是最简单的一种方式，默认的就是当前的用户信息。比如spContext.Credentials =new NetWorkCredentials (uid,pwd,domain);或者在模拟请求的时候request.Credentials =new NetWorkCredentials (uid,pwd,domain);这种方式就不用再次请求进行修改文件或者item的属性了。默认的就是当前请求的用户。

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