当Outlook运行时，MAPISendMail不起作用

我一直使用Winforms应用程序中的Mapi32发送带有附件的新邮件消息，现在它运行得非常好。（是的，我知道从C＃调用MAPI32不受支持。）当Outlook运行时，MAPISendMail不起作用

在最近几天内，它在Outlook运行时停止工作。但是，如果Outlook未运行，它将按预期工作。这发生在Vista和XP中。

有没有这样的问题？你是如何解决它的？

这是我一直在使用的代码：

public class EmailController 
{ 
    [DllImport("MAPI32.DLL", CharSet = CharSet.Ansi)] 
    public static extern int MAPISendMail(IntPtr lhSession, IntPtr ulUIParam, 
     MapiMessage lpMessage, int flFlags, int ulReserved); 
    public const int MAPI_LOGON_UI = 0x00000001; 
    private const int MAPI_DIALOG = 0x00000008; 

    public static int SendMail(string strAttachmentFileName, string strSubject,string to) 
    { 

     IntPtr session = new IntPtr(0); 
     IntPtr winhandle = new IntPtr(0); 

     MapiMessage msg = new MapiMessage(); 
     msg.subject = strSubject; 

     int sizeofMapiDesc = Marshal.SizeOf(typeof(MapiFileDesc)); 
     IntPtr pMapiDesc = Marshal.AllocHGlobal(sizeofMapiDesc); 

     MapiFileDesc fileDesc = new MapiFileDesc(); 
     fileDesc.position = -1; 
     int ptr = (int)pMapiDesc; 

     string path = strAttachmentFileName; 
     fileDesc.name = Path.GetFileName(path); 
     fileDesc.path = path; 
     Marshal.StructureToPtr(fileDesc, (IntPtr)ptr, false); 

     msg.files = pMapiDesc; 
     msg.fileCount = 1; 


     List<MapiRecipDesc> recipsList = new List<MapiRecipDesc>(); 
     MapiRecipDesc recipient = new MapiRecipDesc(); 

     recipient.recipClass = 1; 
     recipient.name = to; 
     recipsList.Add(recipient); 

     int size = Marshal.SizeOf(typeof(MapiRecipDesc)); 
     IntPtr intPtr = Marshal.AllocHGlobal(recipsList.Count * size); 

     int recipPtr = (int)intPtr; 
     foreach (MapiRecipDesc mapiDesc in recipsList) 
     { 
      Marshal.StructureToPtr(mapiDesc, (IntPtr)recipPtr, false); 
      recipPtr += size; 
     } 

     msg.recips = intPtr; 
     msg.recipCount = 1; 
     int result = MAPISendMail(session, winhandle, msg, MAPI_LOGON_UI | MAPI_DIALOG, 0); 

     return result; 
    } 
} 

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] 
public class MapiMessage 
{ 
    public int reserved; 
    public string subject; 
    public string noteText; 
    public string messageType; 
    public string dateReceived; 
    public string conversationID; 
    public int flags; 
    public IntPtr originator; 
    public int recipCount; 
    public IntPtr recips; 
    public int fileCount; 
    public IntPtr files; 
} 

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] 
public class MapiFileDesc 
{ 
    public int reserved; 
    public int flags; 
    public int position; 
    public string path; 
    public string name; 
    public IntPtr type; 
} 

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] 
public class MapiRecipDesc 
{ 
    public int reserved; 
    public int recipClass; 
    public string name; 
    public string address; 
    public int eIDSize; 
    public IntPtr entryID; 
}

来源

2009-02-25 Jon Dewees

调用者进程的完整性级别可能与Outlook的完整性级别不同。使用Process Explorer查找正在运行的进程的IL。 – wqw 2012-11-22 12:30:11

可能与您的问题没有关系，但是我有`MAPISendMail`挂在Outlook上，因为邮件地址有空格！ – 2017-11-15 12:50:30

好了，比评明显的“支持C＃邮件的发送方法使用”其他，我想知道如果事情发生在Mapi32.dll文件 - 有您在Outlook中尝试了“检测并修复”？

我也在这里阅读（http://office.microsoft.com/en-us/outlook/HP011164781033.aspx），您可以执行一些步骤（帖子和注释）让Outlook修复或替换dll。

来源

2009-02-25 19:10:36

int result = MAPISendMail（session，winhandle，msg，MAPI_LOGON_UI | MAPI_DIALOG，0）;
return result; 

是什么回报？

来源

2009-10-12 14:07:15

如果您的应用程序使用提升特权（即以管理员身份）运行，而Outlook不在，则发送将失败。您将不得不通知用户关闭所有正在运行的Outlook实例，然后重试。

来源

2013-07-19 04:10:09

当Outlook运行时，MAPISendMail不起作用

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