C# - 將文件作為附件添加到 Microsoft.SharePoint.Client.ListItem (SharePoint 2010)

Question

我沒有更多的想法。 我想為 Sharepoint 列表創建一個新元素並將文件添加為附件。 我可以用ListItem創建一個新元素。 但是文件不會上傳。

我嘗試使用SaveBinaryDirect()函數和AttachmentCreationInformation()類。 如果我嘗試我得到這個例外

拋出異常：System.dll 中的“System.Net.WebException”（400）

我還連接到 SharePoint Server 並查看了 Windows 日志，但我什么也沒找到。

在我的代碼中，我添加了一個帶有lLibrary.AddItem(itemCreateInfo)的新ListItem 。 使用ListItem我在 SharePoint 中創建了一個新元素。 此元素位於 SharePoint 文件夾中。 這一切都很好。

我嘗試了很多，但沒有任何效果。 我需要幫助，請！

這是我的完整代碼：

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;
    }

編輯！：

我犯了一個大錯誤。 Sharepoint 是 2010。所以AttachmentFiles.Add()函數不起作用。

我發現我必須添加一個服務引用並更改我的代碼。 可以在SharePoint 2010 - 客戶端對象模型 - 添加附件到 ListItem 中找到更多信息

但現在我收到了 Exception 500。這就是我嘗試連接到測試 SharePoint 的原因。 在那里我可以使用 Message The list does not exist. The selected page contains a list that does not exist. The list could have been deleted by another user.讀取日志信息The list does not exist. The selected page contains a list that does not exist. The list could have been deleted by another user. The list does not exist. The selected page contains a list that does not exist. The list could have been deleted by another user.

我不知道我必須為找到列表的函數AddAttachment()指定什么listName屬性。

我的新代碼：

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

我終於開始工作了！

問題是在配置文件App.Config ，端點地址顯式引用了站點。

“配置”文件的一部分：

<system.serviceModel>
<bindings>
  <basicHttpsBinding>
    <binding name="ListsSoap">
      <security>
        <transport clientCredentialType="Ntlm" proxyCredentialType="Ntlm" />
      </security>
    </binding>
  </basicHttpsBinding>
</bindings>
<client>
  <endpoint address="https://TestSharePoint.com/_vti_bin/lists.asmx"
    binding="basicHttpsBinding" bindingConfiguration="ListsSoap"
    contract="SPRivarkom.ListsSoap" name="ListsSoap" />
</client>
</system.serviceModel>

在標簽“端點”是屬性“地址”。 這包含網絡參考的地址。 但正確的地址必須是address="https://TestSharePoint.com/TestSite/TestUnderSite/_vti_bin/lists.asmx" 。

Answer 2

請嘗試以下代碼。 修改了文件夾 url 的形成方式。 還修改了一些與附件上傳相關的代碼。

在sUrl ，請傳遞您網站集的完整網址。

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();
}