"试图使用已不复存在的物体" lists.asmx出错

时间:2015-10-29 20:35:33

标签: .net web-services sharepoint sharepoint-2010

我正在使用通过表单界面创建SharePoint列表项的.NET应用程序。应用程序需要允许用户将附件上载到列表项。我可以创建列表项,但是当使用list.asmx服务addAttachment方法时,我得到一个"尝试使用已经不存在的对象"尝试通过FileUpload控件附加文件时出错,其中文件作为字节数组存储在会话中。

我的代码看起来像这样......

创建列表项:

protected void CreateListIteminSharepoint()
        {
            try
            {
                ServiceReference1.ListsSoapClient proxy = new ServiceReference1.ListsSoapClient();
                proxy.ClientCredentials.Windows.ClientCredential = new NetworkCredential();

                XElement list = proxy.GetList("MyList");

                // assigning field values...
                string strBatch = "<Method ID='1' Cmd='New'><Field Name='ID' >New</Field>

                // field assignments omitted to shorten code paste

                StringReader reader = new StringReader(strBatch);
                XElement method = XElement.Load(reader);
                XElement element = new XElement("Batch");
                element.SetAttributeValue("OnError", "Continue");
                element.SetAttributeValue("PreCalc", "TRUE");
                element.SetAttributeValue("ListVersion", "1");
                element.SetAttributeValue("ViewName", listViewGuid);
                element.Add(method);
                XElement ndReturn = proxy.UpdateListItems("MyList", element);

                // post headshot image attachment - function in code further down the post
                if (Session["Headshot"] != null)
                {
                    var headshotFile = (byte[])Session["Headshot"];
                    UploadDocToSharepoint(headshotFile, (string)Session["HeadshotFileName"]);
                }
            }
            catch (Exception ex)
            {
                    throw;
            }
        }

FileUpload控制按钮事件:

protected void btnHeadShotUpload_Click(object sender, EventArgs e)
{
    if (HeadshotUpload.HasFile)
    {
        var file = HeadshotUpload.FileBytes;
        Session.Add("Headshot", file);
        Session.Add("HeadshotFileName", headshotFileName + " - " + HeadshotUpload.FileName);
    }
}

附件功能:

public void UploadDocToSharepoint(byte[] sourceFile, string destinationFileName)
        {
                ServiceReference1.ListsSoapClient proxy = new ServiceReference1.ListsSoapClient();
                proxy.ClientCredentials.Windows.ClientCredential = new NetworkCredential();

                try
                {
                    string addAttach = proxy.AddAttachment("MyList", "3228",
                        "image.jpg", sourceFile);
                    MessageBox.Show(addAttach);
                }

                catch (System.Web.Services.Protocols.SoapException ex)
                {
                    throw;
                }

                catch (Exception ex)
                {
                    throw;
                }
        }

ULS登录SharePoint Server:

  

SOAP异常:Microsoft.SharePoint.SPException:尝试使用   已不复存在的物体。 (HRESULT的例外情况:0x80030102   (STG_E_REVERTED))---&gt; System.Runtime.InteropServices.COMException   (0x80030102):尝试使用已不复存在的对象。   (来自HRESULT的异常:0x80030102(STG_E_REVERTED))

在附件功能中,3228列表项ID是我用于测试的现有列表项。我已验证此列表项确实存在于SharePoint列表中。期望的最终结果是将文件附加到上载附件之前创建的列表项。

任何人都可以提供有关导致此错误的原因的任何见解吗?

1 个答案:

答案 0 :(得分:0)

我能够使附件功能正常工作。出于某种原因,SharePoint不喜欢Session中传递给addAttachment函数的数组。将Memorystream传递给addAttachment函数的字节数组参数正常工作。

我不确定为什么这是必要的,但确实解决了这个问题。检查每个字节数组显示它们尽可能相同。