Marshal.GetActiveObject从esri c #adginin抛出异常

问题描述

我希望我的esri插件能够查找并使用现有的excel实例。代码：

I want my esri addin to look for and use an existing instance of excel. The code:

Microsoft.Office.Interop.Excel.Application exApp = null;
try
{
  exApp = (Microsoft.Office.Interop.Excel.Application)System.Runtime.InteropServices.Marshal.GetActiveObject("Excel.Application");
}
catch (Exception err)
{MessageBox.Show(err.ToString()); }

GetActiveObject每次抛出异常：

GetActiveObject throws an exception every time:

引用：

来自marshal.getactiveobject的异常

System.Runtime.InteropServices.COMException（0x800401E3）;操作不可用（HRESULT异常：0x800401E3（MK_E_UNAVAILABLE））

在System.Runtime.InteropServices.Marshal.GetActiveObject（bla bla bla）

exception from marshal.getactiveobject
System.Runtime.InteropServices.COMException (0x800401E3); Operation unavailable (Exception from HRESULT: 0x800401E3 (MK_E_UNAVAILABLE))
at System.Runtime.InteropServices.Marshal.GetActiveObject( bla bla bla)

我写了一个小测试应用程序（Windows应用程序）来做同样的事情，它按预期工作。如果excel正在运行，它将返回对excel实例的引用，否则返回null。它从不抛出异常。为什么插件每次抛出异常？关于esri addins的事情？ （这是arcmap的附加内容）



现在已经好几天了，任何帮助都表示赞赏。谢谢！

I wrote a little test app (windows app) to do this same thing, it works as expected. It returns a reference to the instance of excel if excel is running, otherwise it returns null. It never throws the exception. Why is the addin throwing an exception every time? Something about esri addins? (It's an addin to arcmap)

Been banging on this for days now, any help is appreciated. thanks!

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