问题描述
请参阅第一次修改（在底部截图）：
我已经按照这篇文章有一个winform应用程序触发一个VSTO加载方法：
的
I've followed this article to have a Winform app trigger a VSTO Add-In method:http://blogs.msdn.com/b/andreww/archive/2007/01/15/vsto-add-ins-comaddins-and-requestcomaddinautomationservice.aspx
在上述文章的最后笔者提到了一个问题，试图在这里改善它：
的
At the end of the above article the author mentions a issue and tries to ameliorate it here:http://blogs.msdn.com/b/andreww/archive/2008/08/11/why-your-comaddin-object-should-derive-from-standardolemarshalobject.aspx
我已经通过几个代码现在时代和导出StandardOleMarshalObject改善异常不起作用
I have been through the code several times now and the method to derive StandardOleMarshalObject to ameliorate the exception does not work!
System.InvalidCastException方法：无法投型系统.__ ComObject的COM对象的接口类型...此操作失败的原因是对IID
下面是一个摄制 - 这两个项目面向.NET 3.5：
Here is a repro - both projects target .Net 3.5:
a）创建一个新的Office> 2007或2010> Excel插件：
a) Create a new Office > 2007 or 2010 > Excel Add-In:
namespace ExcelAddIn1
{
public partial class ThisAddIn
{
private AddinUtilities addinUtilities;
protected override object RequestComAddInAutomationService()
{
if (addinUtilities == null)
{
addinUtilities = new AddinUtilities();
}
return addinUtilities;
}
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
}
private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
}
}
}
b）添加一流的Excel插件：
b) Add a class to the Excel Add-In:
namespace ExcelAddIn1
{
[ComVisible(true)]
[InterfaceType(ComInterfaceType.InterfaceIsDual)]
public interface IAddinUtilities
{
void DisplayMessage();
}
[ComVisible(true)]
[ClassInterface(ClassInterfaceType.None)]
public class AddinUtilities :
StandardOleMarshalObject,
IAddinUtilities
{
void IAddinUtilities.DisplayMessage()
{
MessageBox.Show("Hello World");
}
}
}
c）设置项目属性>建立> seklect注册为COM互操作。
c) Set Project Properties > Build > seklect Register For COM Interop. Compile the Add-In.
d）新的winform应用程序，引用ExcelAddIn1，和的Microsoft.Office.Interop.Excel办公室和包括在Form1中的代码>
d) New Winform App, reference the ExcelAddIn1, Microsoft.Office.Interop.Excel and Office and include this code in Form1:
public partial class Form1 : Form
{
private Microsoft.Office.Interop.Excel.Application excel;
private IAddinUtilities utils;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
excel = new Microsoft.Office.Interop.Excel.Application();
excel.Visible = true;
excel.Workbooks.Add(Microsoft.Office.Interop.Excel.XlSheetType.xlWorksheet);
object addinName = "ExcelAddin1";
COMAddIn addin = excel.COMAddIns.Item(ref addinName);
utils = (IAddinUtilities)addin.Object;
utils.DisplayMessage();
}
}
E）运行WinForm的应用程序和行 utils的=（IAddinUtilities）addin.Object; 无论失败与否AddinUtilities从StandardOleMarshalObject派生。
e) Run the Winform app and the line utils = (IAddinUtilities)addin.Object; fails regardless of whether or not AddinUtilities derives from StandardOleMarshalObject.
我在这里损失的MSDN博客明确表示：要解决这一切，您可以简单地从StandardOleMarshalObject派生AddinUtilities类，并重建：
I am at a loss here as the MSDN Blog specifically says: "To fix all this, you can simply derive the AddinUtilities class from StandardOleMarshalObject, and rebuild:"
1日编辑：我试图在另一台PC-b的代码和它的工作没有从 StandardOleMarshalObject ，
1st I tried the code on another PC-B and it works without deriving from StandardOleMarshalObject,
当我与 StandardOleMarshalObject 在PC-b试过我得到了同样的问题，因为PC-A。 PC-A不与任何方式工作，我能想到的唯一的区别是管理权限。
When I tried with StandardOleMarshalObject on PC-B I got the same problem as PC-A. PC-A doesn't work with either ways and the only difference I can think of is admin rights.
管理员权限和预Win7的（旧MSDN文章）是我能想到的，为什么它不会工作的唯一原因。
Admin rights and pre-Win7 (old msdn articles) are the only reasons I can think of why it would not work.
推荐答案
在设定注册为COM Interop 我发现，你需要以管理员身份运行。
没有管理员试图编译我得到了像错误：
Without Administrator trying to compile I got errors like:
无法注册程序集 C：\TFS\Project\Src\ProjectAddin\bin\Debug
\ProjectAddin.dll - 访问被拒绝。请确保您正在运行
的应用程序作为管理员。访问注册表项
'HKEY_CLASSES_ROOT\CLSID {3A6192EA-3C9C-39EB-99A3-3DBFF8CA118F}'是
拒绝。
上面的注册表项是不存在的，所以我创造了它，然后试图编译我得到了：
The above registry key didn't exist so I created it, then trying to compile I got:
无法注册类型库
C：\TFS\Project\Src\ProjectAddin\bin\Debug \ProjectAddin.tlb。错误
访问OLE注册表。 （异常来自HRESULT：0x8002801C
（TYPE_E_REGISTRYACCESS））
关闭注册COM互操作和错误消失 - 但是这使得它无法工作。
Solution
Turn off Register for COM interop and the error goes away - but this causes it not to work!
Shift +右键单击Visual Studio和以管理员身份打开，开该项目。勾选注册为COM Interop，它编译成功，现在从StandardOleMarshalObject派生时，它适用于PC-A - ，但它不无StandardOleMarshalObject工作 - 这是我对PC-B获得了相反的结果。
Shift + Right click Visual Studio and open as Administrator, open the project. Tick Register for Com interop and it compiles successfully and it works now on PC-A when deriving from StandardOleMarshalObject - but it doesn't work without StandardOleMarshalObject - which is the opposite results I got on PC-B.
这篇关于VSTO加载项，COMAddIns和RequestComAddInAutomationService的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！