Question

我没有更多的想法。我想为Sharepoint List创建一个新元素，并将文件添加为附件。我可以用ListItem创建一个新元素。但该文件不会上传。

我尝试使用SaveBinaryDirect()函数和AttachmentCreationInformation()类。如果我尝试我得到这个例外

抛出异常：＆＃39; System.Net.WebException＆＃39;在System.dll（400）
中

我还连接到SharePoint Server并查看了Windows日志，但我什么也没找到。

在我的代码中，我使用ListItem添加了一个新的lLibrary.AddItem(itemCreateInfo)。使用ListItem我在SharePoint中创建一个新元素。此元素位于SharePoint文件夹中。这一切都运作良好。

我尝试了很多，但没有任何效果。我需要帮助！

这是我的完整代码：

public bool UploadToSharepoint(string sURL, string sLibrary, string sFolderName, string sTitel, string sDescription, string sFilePath)
    {
        using (ClientContext clientContext = new ClientContext(sURL))
        {
            if (!SetCredentialsInClientContext(clientContext))
            {
                return false;
            }

            List lLibrary = clientContext.Web.Lists.GetByTitle(sLibrary);

            clientContext.Load(clientContext.Web.Lists);
            clientContext.Load(lLibrary, l => l.RootFolder.ServerRelativeUrl);

            clientContext.ExecuteQuery();

            ListItemCreationInformation itemCreateInfo = new ListItemCreationInformation();
            if (!string.IsNullOrEmpty(sFolderName))
            {
                itemCreateInfo.FolderUrl = lLibrary.RootFolder.ServerRelativeUrl + "/" + sFolderName;
            }

            ListItem newItem = lLibrary.AddItem(itemCreateInfo);

            #region Work only with Document list in SharePoint
            //using (FileStream fs = new FileStream(sFilePath, FileMode.Open))
            //{
            //    clientContext.Load(lLibrary.RootFolder);
            //    clientContext.ExecuteQuery();
            //    string fileUrl = string.Format("{0}/{1}", lLibrary.RootFolder.ServerRelativeUrl, fi.Name);
            //    Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, fileUrl, fs, true);
            //}  // Ende using 'FileStream'
            #endregion

            using (FileStream fs = new FileStream(sFilePath, FileMode.Open))
            {
                #region WORK!
                newItem["Title"] = sTitel;
                newItem["Description"] = sDescription;
                newItem.Update();
                clientContext.ExecuteQuery();
                #endregion

                #region SaveBinaryDirect Example NOT WORK
                //using (FileStream strm = new FileInfo(sFilePath).Open(FileMode.Open))
                //{
                //    Uri url = new Uri(sURL);
                //    //Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, url.AbsolutePath + "/Attachments/" + newItem.Id + "/" + fi.Name, strm, true);
                //    Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, lLibrary.RootFolder.ServerRelativeUrl + "/Attachments/" + newItem.Id + "/" + fi.Name, strm, true);
                //}

                ////Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, "", fs, true);
                //string serverRelativeUrl = lLibrary.RootFolder.ServerRelativeUrl;
                //Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, serverRelativeUrl, fs, true);
                #endregion

                #region AttachmentCreationInformation Example NOT WORK
                AttachmentCreationInformation attInfo = new AttachmentCreationInformation();
                attInfo.FileName = fs.Name;
                attInfo.ContentStream = fs;
                newItem.AttachmentFiles.Add(attInfo);
                newItem.Update();
                clientContext.ExecuteQuery();
                #endregion
            }
        }
        return true;
    }

编辑：！

我犯了一个大错。 Sharepoint是2010年。所以AttachmentFiles.Add()功能无效。

我发现我必须添加服务引用并更改我的代码。更多信息可在SharePoint 2010 - Client Object Model - Add attachment to ListItem

找到

但现在我得到了Exception 500.这就是我尝试连接到Test SharePoint的原因。在那里，我可以使用消息The list does not exist. The selected page contains a list that does not exist. The list could have been deleted by another user.

读取日志信息

我不知道我必须为找到列表的函数listName指定什么AddAttachment()属性。

我的新代码：

public bool UploadToSharepoint(string sURL, string sLibrary, string sFolderName, string sTitel, string sDescription, string sFilePath)
    {
        using (ClientContext clientContext = new ClientContext(sURL))
        {
            if (!SetzeCredentialsInClientContext(clientContext))
            {
                return false;
            }

            List lLibrary = clientContext.Web.Lists.GetByTitle(sLibrary);

            clientContext.Load(lLibrary);
            clientContext.Load(lLibrary.RootFolder);
            clientContext.ExecuteQuery();

            ListItemCreationInformation listItemCreationInformation = new ListItemCreationInformation();
            if (!string.IsNullOrEmpty(sFolderName))
            {
                listItemCreationInformation.FolderUrl = lLibrary.RootFolder.ServerRelativeUrl + "/" + sFolderName;
            }

            var newItem = lLibrary.AddItem(listItemCreationInformation);
            newItem["Title"] = sTitel;
            newItem.Update();
            clientContext.ExecuteQuery();

            clientContext.Load(newItem);
            clientContext.ExecuteQuery();

            TestSP.ListsSoapClient lsc = new TestSP.ListsSoapClient();

            if (_cbAutorisierung.Checked)
            {
                lsc.ClientCredentials.Windows.ClientCredential = new NetworkCredential(tbName.Text, tbPasswort.Text, tbDomain.Text);
            }
            else
            {
                lsc.ClientCredentials.Windows.ClientCredential = CredentialCache.DefaultNetworkCredentials;
            }
            lsc.AddAttachment(sLibrary, newItem["ID"].ToString(), Path.GetFileName(sFilePath), System.IO.File.ReadAllBytes(sFilePath));

        }
        return true;
    }

Answer 1

请尝试以下代码。修改了文件夹URL的形成方式。还修改了一些与附件上传相关的代码。

在sUrl中，请传递您网站集的完整网址。

var list = web.Lists.GetByTitle(sLibrary);
clientContext.Load(list);
clientContext.ExecuteQuery();

ListItemCreationInformation listItemCreationInformation = null;
if (!string.IsNullOrEmpty(sFolderName))
{
    listItemCreationInformation = new ListItemCreationInformation();
    listItemCreationInformation.FolderUrl = string.Format("{0}Lists/{1}/{2}", sURL, sLibrary, sFolderName);
}

var listItem = list.AddItem(listItemCreationInformation);
newItem["Title"] = sTitel;
newItem["Description"] = sDescription;
listItem.Update();
clientContext.ExecuteQuery();                

using (FileStream fs = new FileStream(sFilePath, FileMode.Open))
{
    var attInfo = new AttachmentCreationInformation();
    attInfo.FileName = fs.Name;
    attInfo.ContentStream = fs;                    

    var att = listItem.AttachmentFiles.Add(attInfo);
    clientContext.Load(att);
    clientContext.ExecuteQuery();
}

C＃ - 将文件作为附件添加到Microsoft.SharePoint.Client.ListItem（SharePoint 2010）

1 个答案: