为什么选择Sharepoint文件。Add()导致I/O错误?

使用此代码:

    using (var ms = new MemoryStream())
    {
        using (var doc = new Document(PageSize.A4, 25, 25, 10, 10)) 
        {
            //Create a writer that's bound to our PDF abstraction and our 
stream
            using (var writer = PdfWriter.GetInstance(doc, ms))
            {

                //Open the document for writing
                doc.Open();

                . . .

            }
        // File has been generated, now save it
        try
        {
            var bytes = ms.ToArray();
            String pdfFileID = GetYYYYMMDDAndUserNameAndAmount();
            String pdfFileName = String.Format("DirectPayDynamic_{0}.pdf", 
pdfFileID);
            String fileFullpath = 
Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirector
y), pdfFileName); 
            String fileLinkBase = "Generated PDF: <a href=\"{0}\">{1}</a>";
            String filelink = String.Format(fileLinkBase, fileFullpath, 
pdfFileName);

            File.WriteAllBytes(fileFullpath, bytes);
            AddVerticalSpace();                    

            var pdflink = new Label
            {
                CssClass = "finaff-webform-field-label",
                Text = filelink
            };
            this.Controls.Add(pdflink); 

    // NOTE: This is the new (non-working, exception-throwing) part of the 
code, where we're trying to save the PDF file to a Sharepoint Document Library
            string destination = String.Format("DirectPayPDFForms/{0}", 
pdfFileName); 
            SPSite siteCollection = new SPSite(siteUrl);
            SPWeb site = SPContext.Current.Web; 
            site.Files.Add(destination, ms); // this is the line that fails
    // end of new code      
        }
        catch (DocumentException dex)
        {
            exMsg = dex.Message;
        }
        catch (IOException ioex)
        {
            exMsg = ioex.Message;
        }
        catch (Exception ex)
        {
            exMsg = ex.Message;
            ; // for debugging: What is "ex" here?
        }
    } // using (var ms = new MemoryStream())            
} // GeneratePDF

……我明白了,” 发生I/O错误 “(在IOException捕获块中)。这是一行:

site.Files.Add(destination, ms);

…引发错误。是我的目的地还是内存流导致了问题?“destination”是Sharepoint文档库(DirectPayPDFForms)的名称加上文件的生成名称。如果没有这段新代码,该方法运行良好,并将PDF文件放在服务器上(但这不是我们想要的地方-我们需要它首先转到文档库)。

更新

我得到了相同的异常,用调用this替换上面有问题的代码块:

private void SavePDFToDocumentLibrary(MemoryStream memstrm)
{
    string doclib = "DirectPayPDFForms";
    try
    {
        using (SPSite site = new SPSite(siteUrl))
        {
            using (SPWeb web = site.RootWeb)
            {
                SPList list = web.Lists[doclib];
                SPListItem spli = list.Items.Add();
                spli["Title"] = String.Format("DirectPayPDFForms-{0}-{1}", GetUserId(), GetListTitleTimeStamp());

                if (null != memstrm)
                {
                    web.Files.Add(doclib, memstrm); 
                }
                // If this works, update at least some of the fields, such as Created, CreatedBy, etc.
                spli.Update();
            }
        }
    }
    catch (Exception ex)
    {
        String s = String.Format("Exception is {0}", ex.Message);
    }
}

这种类型的代码在另一个实例中工作(我可以通过这种方式成功地将值保存到列表中),因此问题一定是文档库特有的。我是否需要将文档保存到 领域 在文档库中?

更新2

我也尝试过:

string saveloc = String.Format(@"{0}\{1}", doclib, filename);

…具有相同的结果。

还有这个:

string saveloc = String.Format(@"{0}\{1}\{2}", siteUrl, doclib, filename);

……这至少提供了一些多样性,“ URI无效:无法分析主机名。 "

有了这个:

string saveloc = String.Format("{0}/{1}/{2}", siteUrl, doclib, filename);

……我又回到了“发生I/O错误”这句老话。

更新3

由于Sharepoint网站的“AllItems.aspx”页面同时包含“文档”和“列表”,我想知道在这种情况下,我是否不应该使用列表,而是使用文档。IOW,也许我的代码应该是这样的:

SPDocTemplateCollection spdoctemplatecoll = web.DocTemplates;
SPDocumentLibrary spdoclib = spdoctemplatecoll[doclib];
SPListItem spli = spdoclib.Items.Add();

…当前位置:

SPList list = web.Lists[doclib];
SPListItem spli = list.Items.Add();
SPListItem spli = list.Items.Add();

…但这一猜测没有引起注意,因为它不会编译(我得到,“与‘Microsoft.SharePoint.SPDocTemplateCollection.this[int]’匹配的最佳重载方法具有一些无效参数”和“参数1:无法从‘string’转换为‘int’”)