Question

我将带有自定义表单的Outlook联系人从特定的“联系人”文件夹导出为CSV。此文件夹不是默认位置。这是一个拥有近7,000个联系人的大文件夹。这是Office 365中的共享邮箱，但由于自定义数据，我们无法使用Outlook或Graph API。

我的下面的代码工作正常，但在迭代200-800个联系人后，我收到此错误：＆＃34; RPC服务器不可用。（来自HRESULT的异常：0x800706BA）。＆＃34;

我还尝试将文件夹导出到.pst并访问本地计算机上的该文件夹。结果基本相同。更新：我一直在看任务管理器中的Outlook.exe，它在崩溃之前稳定地将内存消耗增加到大约300MB。我在运行Office 2010的笔记本电脑上尝试了相同的代码，然后我得到了一个“内存不足”＃34;错误。

我得到的错误是Outlook是打开还是关闭，但在程序运行期间关闭Outlook会立即触发此错误。 Outlook会在此错误后启动（或重新启动）。我已经阅读了许多与此错误相关的SO帖子和文章，但我不确定究竟发生了什么。任何帮助表示赞赏。

更新：根据Dmitry Streblechenko的建议，代码已更新为使用for循环而非foreach循环。

using System;
using Microsoft.Office.Interop.Outlook;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;

namespace OutlookContacts
{
    class Program
    {
        static void Main(string[] args)
        {
            var encoding = Encoding.UTF8;
            string csvPath = @"myCSVPath";
            Application outlook = new Application();
            NameSpace ns = outlook.GetNamespace("MAPI");
            MAPIFolder sharedContacts;
            string recipientName = "myEmail@myDomain";
            StringBuilder headerRow = new StringBuilder();
            Recipient recip = ns.CreateRecipient(recipientName);
            StreamWriter writer = new StreamWriter(csvPath, false, encoding);

            recip.Resolve();
            if (recip.Resolved)
            {
                try
                {
                    //EntryID and StoreID of my folder
                    sharedContacts =
                        ns.GetFolderFromID(
                            "myEntryID",
                            "myStoreID"
                            );
                    Items contacts = sharedContacts.Items;

                    //Writing header row
                    ContactItem first = contacts.GetFirst();
                    var properties = first.ItemProperties;
                    for(int i = 0; i < properties.Count; i++)
                    {
                        try
                        {
                            headerRow.Append(string.Format("\"{0}\",", properties[i].Name));
                        }
                        catch (System.Exception ex)
                        {
                            headerRow.Append(string.Format("{0},", ex.Message));
                        }
                    }
                    headerRow.AppendLine(Environment.NewLine);
                    WriteToCSV(writer, headerRow);
                    Console.WriteLine("Header row written;");
                    Marshal.ReleaseComObject(properties);
                    Marshal.ReleaseComObject(first);

                    //Writing Records
                    for (int i = 1; i <= contacts.Count; i++)
                    {
                        object o = contacts[i];
                        if (o is ContactItem)
                        {
                            ContactItem contact = (ContactItem)o;
                            if (contact != null)
                            {
                                Console.Write(contact.FullName);
                                StringBuilder dataRow = new StringBuilder();
                                ItemProperties contactProps = contact.ItemProperties;
                                for (int j = 0; j < contactProps.Count; j++)
                                {
                                    ItemProperty property = contactProps[j];

                                    try
                                    {
                                        if (property.Value == null)
                                        {
                                            string value = "null,";
                                            dataRow.Append(value);
                                        }
                                        //else if (property.Name == "Attachments")
                                        //{
                                        //    //Attachment file names
                                        //    string attachment = "";
                                        //    for (int k = 1; k < contact.Attachments.Count; k++)  
                                        //    {
                                        //            attachment = (string.Format("\"{0}\"; ", contact.Attachments[k].FileName));
                                        //            dataRow.Append(attachment);
                                        //    }
                                        //    dataRow.Append(",");
                                        //}
                                        else
                                        {
                                            string value = property.Value.ToString();
                                            value = value.Replace("\r\n\r\n\r\n", "\r\n")
                                                .Replace("\r\n\r\n", "\r\n")
                                                .Replace("\"", "'");
                                            value = (string.Format("\"{0}\",", value));
                                            dataRow.Append(value);
                                        }
                                    }
                                    catch (System.Exception ex)
                                    {
                                        string value = string.Format("{0}: {1},", property.Name, ex.Message);
                                        dataRow.Append(value);
                                    }

                                    Marshal.ReleaseComObject(property);
                                }
                                dataRow.Append(Environment.NewLine);
                                WriteToCSV(writer, dataRow);
                                Marshal.ReleaseComObject(contactProps);
                                Marshal.ReleaseComObject(contact);
                            }
                            Marshal.ReleaseComObject(o);
                            counter++;
                            Console.WriteLine(": Written " + counter);
                        }
                    }
                }
                catch (System.Exception ex)
                {
                    Console.WriteLine(dataRow.ToString(), ex.Message);
                    Console.ReadKey();
                }

            }

        }

        static void WriteToCSV(StreamWriter writer, StringBuilder row)
        {
            var data = row.ToString();
            writer.WriteAsync(data);
        }

    }
}

Answer 1

看起来你的RPC频道已经用完了。您需要避免使用foreach循环（它们倾向于保持所有集合成员被引用，直到循环退出）并且在完成后立即显式释放所有COM对象。

脱离我的头顶：

for(int i = 1; i <= contacts.Count; i++)
{
    obejct o = contacts[i];
    ContactItem contact = o as ContactItem;
    if (o != null)
    {
        ItemProperties properties = contact.ItemProperties;
        StringBuilder newLine = new StringBuilder();
        for (int j = 1; j <= properties.Count; j++)
        {
            ItemProperty property = properties[j];
            var value = "";
            if (property.Value == null)
            {
                value = "null,";
                Console.WriteLine(value);
                newLine.Append(value);
            }
            else
            {
                value =  property.Value.ToString() + ",";
                newLine.Append(value);
            }
            Marshal.ReleaseComObject(property);
        }
        newLine.Append(Environment.NewLine);
        WriteToCSV(writer, newLine);
        Marshal.ReleaseComObject(properties);
        Marshal.ReleaseComObject(contact);
    }
    Marshal.ReleaseComObject(o);
}

＆＃34; RPC服务器不可用＆＃34;将Outlook联系人导出为CSV

1 个答案: