Microsoft Visual Studio 中的引用不起作用

Question

目前，我正在尝试使用 VB.NET 发送电子邮件。现在，我使用此代码添加了引用：（我已添加占位符）

Module Module1

    Sub Main()
        ' Create an Outlook application.
        Dim oApp As Outlook._Application
        oApp = New Outlook.Application()

        ' Create a new MailItem.
        Dim oMsg As Outlook._MailItem
        oMsg = oApp.CreateItem(Outlook.OlItemType.olMailItem)
        oMsg.Subject = "Send Attachment Using OOM in Visual Basic .NET"
        oMsg.Body = "Hello World" & vbCr & vbCr

        ' TODO: Replace with a valid e-mail address.
        oMsg.To = "[email protected]"

        ' Add an attachment
        ' TODO: Replace with a valid attachment path.
        Dim sSource As String = "C:\Temp\Hello.txt"
        ' TODO: Replace with attachment name
        Dim sDisplayName As String = "Hello.txt"

        Dim sBodyLen As String = oMsg.Body.Length
        Dim oAttachs As Outlook.Attachments = oMsg.Attachments
        Dim oAttach As Outlook.Attachment
        oAttach = oAttachs.Add(sSource, , sBodyLen + 1, sDisplayName)

        ' Send
        oMsg.Send()

        ' Clean up
        oApp = Nothing
        oMsg = Nothing
        oAttach = Nothing
        oAttachs = Nothing
    End Sub

End Module

如何使所有 Outlook 项目（Outlook.Application、Outlook._MailItem、Outlook、Outlook.Attachments、Outlook.Attachment）的引用正常工作) 要么是未声明的，要么是未定义的。

提前致谢。

Answer 1

在“解决方案资源管理器”中，右键单击您的项目并选择“添加引用”，然后向下滚动，直到看到 Microsoft.Office.Interop.Outlook 并选择该项目。然后在 VB 文件顶部添加“Imports Microsoft.Office.Interop”。

Answer 2

添加对“Microsoft Outlook 11.0 对象库”的引用：

1. 在“项目”菜单上，单击“添加引用”。
2. 在“COM”选项卡上，单击“Microsoft Outlook 11.0 对象库”，然后单击“选择”。
3. 单击“添加引用”对话框中的“确定”以接受您的选择。如果系统提示您为所选库生成包装器，请单击“是”。

在代码中，您必须添加以下内容：

Imports Outlook = Microsoft.Office.Interop.Outlook

此处找到更多信息：使用 Microsoft Office Outlook 2003 和 Visual Basic .NET 的便捷任务

但如果您使用 .NET，为什么不使用 System.Net.Mail？

Answer 3

Imports Microsoft.Office.Interop

'On the Project menu, click Add Reference.
'On the COM tab, Double click ->  Microsoft Outlook xx.0 Object Library

Module Module1

    Sub Main()
        ' Create an Outlook application.
        Dim oApp As Outlook._Application
        oApp = New Outlook.Application()

        ' Create a new MailItem.
        Dim oMsg As Outlook._MailItem
        oMsg = CType(oApp.CreateItem(Outlook.OlItemType.olMailItem), Outlook._MailItem)
        oMsg.Subject = "Send Attachment Using OOM in Visual Basic .NET"
        oMsg.Body = "Hello World" & vbCr & vbCr

        ' TODO: Replace with a valid e-mail address.
        oMsg.To = "[email protected]"

        ' Add an attachment
        ' TODO: Replace with a valid attachment path.
        Dim sSource As String = "C:\Temp\Hello.txt"
        ' TODO: Replace with attachment name
        Dim sDisplayName As String = "Hello.txt"

        Dim sBodyLen As Integer = oMsg.Body.Length
        Dim oAttachs As Outlook.Attachments = oMsg.Attachments
        Dim oAttach As Outlook.Attachment
        oAttach = oAttachs.Add(sSource, , sBodyLen + 1, sDisplayName)

        ' Send
        oMsg.Send()

        ' Clean up
        oApp = Nothing
        oMsg = Nothing
        oAttach = Nothing
        oAttachs = Nothing
    End Sub

End Module