C# SharePoint 2010-客户端对象模型-向ListItem添加附件
我有一个SharePoint列表，我正在使用客户端对象模型向其中添加新的ListItems。 添加列表项不是问题，效果很好 现在我想添加附件 我以以下方式使用SaveBinaryDirect：C# SharePoint 2010-客户端对象模型-向ListItem添加附件,c#,sharepoint-2010,client,attachment,listitem,C#,Sharepoint 2010,Client,Attachment,Listitem,我有一个SharePoint列表，我正在使用客户端对象模型向其中添加新的ListItems。 添加列表项不是问题，效果很好 现在我想添加附件 我以以下方式使用SaveBinaryDirect： File.SaveBinaryDirect(clientCtx, url.AbsolutePath + "/Attachments/31/" + fileName, inputStream, true); 只要我尝试将附件添加到的项目已具有通过SharePoint网站添加的附件且未使用客户端对象模型，它
File.SaveBinaryDirect(clientCtx, url.AbsolutePath + "/Attachments/31/" + fileName, inputStream, true);
谢谢，Thorben我已经和微软讨论过这个问题了。看起来远程创建附件的唯一方法是List.asmx web服务。我也尝试过创建此子文件夹，但没有成功。这反映了Microsoft SharePoint团队对该问题的认识和解决方法的可用建议不够好。我是这样处理的： 我正在使用产品附带的新SharePoint 2010托管客户端。因此，我已经有了一个具有凭据的SharePoint ClientContext。以下函数用于向列表项添加附件：
private void SharePoint2010AddAttachment(ClientContext ctx,
string listName, string itemId,
string fileName, byte[] fileContent)
{
var listsSvc = new sp2010.Lists();
listsSvc.Credentials = _sharePointCtx.Credentials;
listsSvc.Url = _sharePointCtx.Web.Context.Url + "_vti_bin/Lists.asmx";
listsSvc.AddAttachment(listName, itemId, fileName, fileContent);
}
很有可能…我也为这个问题挣扎了很长时间，所以我想发布一个完整的代码示例，展示如何成功创建列表项和添加附件 我使用客户机对象API创建列表项，使用SOAP web服务添加附件。这是因为，如web上其他地方所述，客户端对象API只能用于向已存在项目上载目录的项目添加附件（例如，如果项目已具有附件）。否则它会因为一个409错误或者别的什么而失败。soapweb服务可以处理这个问题 请注意，我必须克服的另一件事是，即使我使用以下URL添加了SOAP引用： VS实际添加到app.config的URL为： 我必须手动将app.config更改回正确的URL，否则会出现错误： 列表不存在。 所选页面包含不存在的列表。它可能已被其他用户删除。 0x82000006 代码如下：
void CreateWithAttachment()
{
const string listName = "MyListName";
// set up our credentials
var credentials = new NetworkCredential("username", "password", "domain");
// create a soap client
var soapClient = new ListsService.Lists();
soapClient.Credentials = credentials;
// create a client context
var clientContext = new Microsoft.SharePoint.Client.ClientContext("https://my.sharepoint.installation/personal/test");
clientContext.Credentials = credentials;
// create a list item
var list = clientContext.Web.Lists.GetByTitle(listName);
var itemCreateInfo = new ListItemCreationInformation();
var newItem = list.AddItem(itemCreateInfo);
// set its properties
newItem["Title"] = "Created from Client API";
newItem["Status"] = "New";
newItem["_Comments"] = "here are some comments!!";
// commit it
newItem.Update();
clientContext.ExecuteQuery();
// load back the created item so its ID field is available for use below
clientContext.Load(newItem);
clientContext.ExecuteQuery();
// use the soap client to add the attachment
const string path = @"c:\temp\test.txt";
soapClient.AddAttachment(listName, newItem["ID"].ToString(), Path.GetFileName(path),
System.IO.File.ReadAllBytes(path));
}
希望这对其他人有所帮助。我已经在我的CSOM（SharePoint客户端对象模型）应用程序上使用并尝试过这一功能，它对我很有用
using (ClientContext context = new ClientContext("http://spsite2010"))
{
context.Credentials = new NetworkCredential("admin", "password");
Web oWeb = context.Web;
List list = context.Web.Lists.GetByTitle("Tasks");
CamlQuery query = new CamlQuery();
query.ViewXml = "<View><Where><Eq><FieldRef Name = \"Title\"/><Value Type=\"String\">New Task Created</Value></Eq></Where></View>";
ListItemCollection listItems = list.GetItems(query);
context.Load(listItems);
context.ExecuteQuery();
FileStream oFileStream = new FileStream(@"C:\\sample.txt", FileMode.Open);
string attachmentpath = "/Lists/Tasks/Attachments/" + listItems[listItems.Count - 1].Id + "/sample.txt";
Microsoft.SharePoint.Client.File.SaveBinaryDirect(context, attachmentpath, oFileStream, true);
}
使用（ClientContext=newclientcontext（“http://spsite2010"))
{
context.Credentials=新的网络凭据（“管理员”、“密码”）；
Web oWeb=context.Web；
List List=context.Web.Lists.GetByTitle（“任务”）；
CamlQuery query=新建CamlQuery（）；
query.ViewXml=“新建任务已创建”；
ListItemCollection listItems=list.GetItems（查询）；
加载（列表项）；
context.ExecuteQuery（）；
FileStream oFileStream=新文件流（@“C:\\sample.txt”，FileMode.Open）；
字符串attachmentpath=“/Lists/Tasks/Attachments/”+listItems[listItems.Count-1].Id+“/sample.txt”；
Microsoft.SharePoint.Client.File.SaveBinaryDirect（上下文，attachmentpath，oFileStream，true）；
}
注意：仅当项目文件夹已使用Sharepoint 2010创建时才有效。无法使用COM将第一个附件上载到列表项目。建议使用列表web服务inmstead 使用Sharepoint 2013，它可以正常工作
AttachmentCreationInformation newAtt = new AttachmentCreationInformation();
newAtt.FileName = "myAttachment.txt";
// create a file stream
string fileContent = "This file is was ubloaded by client object meodel ";
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
byte[] buffer = enc.GetBytes(fileContent);
newAtt.ContentStream = new MemoryStream(buffer);
// att new item or get existing one
ListItem itm = list.GetItemById(itemId);
ctx.Load(itm);
// do not execute query, otherwise a "version conflict" exception is rised, but the file is uploaded
// add file to attachment collection
newAtt.ContentStream = new MemoryStream(buffer);
itm.AttachmentFiles.Add(newAtt);
AttachmentCollection attachments = itm.AttachmentFiles;
ctx.Load(attachments);
ctx.ExecuteQuery();
// see all attachments for list item
// this snippet works if the list item has no attachments
<asp:FileUpload ID="FileUpload1" runat="server" AllowMultiple="true" />
protected void UploadMultipleFiles(object sender, EventArgs e)
{
Common.UploadDocuments(Common.getContext(new Uri(Request.QueryString["SPHostUrl"]),
Request.LogonUserIdentity), FileUpload1.PostedFiles, new CustomerRequirement(), 5);
}
public static List<string> UploadDocuments<T>(ClientContext ctx,IList<HttpPostedFile> selectedFiles, T reqObj, int itemID)
{
List<Attachment> existingFiles = null;
List<string> processedFiles = null;
List<string> unProcessedFiles = null;
ListItem item = null;
FileStream sr = null;
AttachmentCollection attachments = null;
byte[] contents = null;
try
{
existingFiles = new List<Attachment>();
processedFiles = new List<string>();
unProcessedFiles = new List<string>();
//Get the existing item
item = ctx.Web.Lists.GetByTitle(typeof(T).Name).GetItemById(itemID);
//get the Existing attached attachments
attachments = item.AttachmentFiles;
ctx.Load(attachments);
ctx.ExecuteQuery();
//adding into the new List
foreach (Attachment att in attachments)
existingFiles.Add(att);
//For each Files which user has selected
foreach (HttpPostedFile postedFile in selectedFiles)
{
string fileName = Path.GetFileName(postedFile.FileName);
//If selected file not exist in existing item attachment
if (!existingFiles.Any(x => x.FileName == fileName))
{
//Added to Process List
processedFiles.Add(postedFile.FileName);
}
else
unProcessedFiles.Add(fileName);
}
//Foreach process item add it as an attachment
foreach (string path in processedFiles)
{
sr = new FileStream(path, FileMode.Open);
contents = new byte[sr.Length];
sr.Read(contents, 0, (int)sr.Length);
var attInfo = new AttachmentCreationInformation();
attInfo.FileName = Path.GetFileName(path);
attInfo.ContentStream = sr;
item.AttachmentFiles.Add(attInfo);
item.Update();
}
ctx.ExecuteQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
existingFiles = null;
processedFiles = null;
item = null;
sr = null;
attachments = null;
contents = null;
ctx = null;
}
return unProcessedFiles;
}
受保护的无效上载多文件（对象发送方，事件参数e）
{
Common.UploadDocuments（Common.getContext（新Uri（Request.QueryString[“SPHostUrl]”）），
Request.LogonUserIdentity），FileUpload1.PostedFiles，new CustomerRequirement（），5）；
}
公共静态列表上载文档（ClientContext ctx、IList selectedFiles、T reqObj、int itemID）
{
列出现有文件=空；
List processedFiles=null；
列出未处理的文件=空；
ListItem=null；
FileStream sr=null；
AttachmentCollection attachments=null；
字节[]内容=空；
尝试
{
existingFiles=新列表（）；
processedFiles=新列表（）；
未处理的文件=新列表（）；
//获取现有项
item=ctx.Web.Lists.GetByTitle（typeof（T）.Name.GetItemById（itemID）；
//获取现有的附加附件
附件=item.AttachmentFiles；
载重量（附件）；
ctx.ExecuteQuery（）；
//添加到新列表中
foreach（附件中的附件att）
现有文件。添加（附件）；
//对于用户选择的每个文件
foreach（所选文件中的HttpPostedFile postedFile）
{
字符串文件名=Path.GetFileName（postedFile.fileName）；
//如果所选文件不存在于现有项目附件中
如果（！existingFiles.Any（x=>x.FileName==FileName））
{
//已添加到进程列表中
processedFiles.Add（postedFile.FileName）；
}
其他的
未处理的文件。添加（文件名）；
}
//Foreach流程项将其添加为附件
foreach（pr中的字符串路径
AttachmentCreationInformation newAtt = new AttachmentCreationInformation();
newAtt.FileName = "myAttachment.txt";
// create a file stream
string fileContent = "This file is was ubloaded by client object meodel ";
System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
byte[] buffer = enc.GetBytes(fileContent);
newAtt.ContentStream = new MemoryStream(buffer);
// att new item or get existing one
ListItem itm = list.GetItemById(itemId);
ctx.Load(itm);
// do not execute query, otherwise a "version conflict" exception is rised, but the file is uploaded
// add file to attachment collection
newAtt.ContentStream = new MemoryStream(buffer);
itm.AttachmentFiles.Add(newAtt);
AttachmentCollection attachments = itm.AttachmentFiles;
ctx.Load(attachments);
ctx.ExecuteQuery();
// see all attachments for list item
// this snippet works if the list item has no attachments
<asp:FileUpload ID="FileUpload1" runat="server" AllowMultiple="true" />
protected void UploadMultipleFiles(object sender, EventArgs e)
{
Common.UploadDocuments(Common.getContext(new Uri(Request.QueryString["SPHostUrl"]),
Request.LogonUserIdentity), FileUpload1.PostedFiles, new CustomerRequirement(), 5);
}
public static List<string> UploadDocuments<T>(ClientContext ctx,IList<HttpPostedFile> selectedFiles, T reqObj, int itemID)
{
List<Attachment> existingFiles = null;
List<string> processedFiles = null;
List<string> unProcessedFiles = null;
ListItem item = null;
FileStream sr = null;
AttachmentCollection attachments = null;
byte[] contents = null;
try
{
existingFiles = new List<Attachment>();
processedFiles = new List<string>();
unProcessedFiles = new List<string>();
//Get the existing item
item = ctx.Web.Lists.GetByTitle(typeof(T).Name).GetItemById(itemID);
//get the Existing attached attachments
attachments = item.AttachmentFiles;
ctx.Load(attachments);
ctx.ExecuteQuery();
//adding into the new List
foreach (Attachment att in attachments)
existingFiles.Add(att);
//For each Files which user has selected
foreach (HttpPostedFile postedFile in selectedFiles)
{
string fileName = Path.GetFileName(postedFile.FileName);
//If selected file not exist in existing item attachment
if (!existingFiles.Any(x => x.FileName == fileName))
{
//Added to Process List
processedFiles.Add(postedFile.FileName);
}
else
unProcessedFiles.Add(fileName);
}
//Foreach process item add it as an attachment
foreach (string path in processedFiles)
{
sr = new FileStream(path, FileMode.Open);
contents = new byte[sr.Length];
sr.Read(contents, 0, (int)sr.Length);
var attInfo = new AttachmentCreationInformation();
attInfo.FileName = Path.GetFileName(path);
attInfo.ContentStream = sr;
item.AttachmentFiles.Add(attInfo);
item.Update();
}
ctx.ExecuteQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
existingFiles = null;
processedFiles = null;
item = null;
sr = null;
attachments = null;
contents = null;
ctx = null;
}
return unProcessedFiles;
}