Word 插件对象始终为空

问题描述

我正在尝试使用以下代码获取 iManage Word 插件对象

using Com.iManage.WorkSiteAddinInterfaces;

public void ManageIManageWordAddIn()
{
    iManageExtensibility iManageAddinObj = null;

    (COMAddIn addin in Globals.ThisAddIn.Application.COMAddIns)
    {   
        string iManage2007orLater = "WorkSiteOffice2007Addins.Connect"

                if (addin.ProgId.Contains(iManage2007orLater))
                {
                    // If addin is connected,try to hijack the DocumentClose2 event
                    if (addin.Connect)
                    {
                        iManageAddinObj = addin.Object as iManageExtensibility; //addin.Object is null
                        // register to iManageAddinObj events here
                        iManageAddinObj.DocumentBeforeClose2 += IManageAddinObj_DocumentBeforeClose2;
                    }
                }
          }
}

private void IManageAddinObj_DocumentBeforeClose2(object Doc,ref bool IgnoreIManageClose,ref bool Cancel)
{
    IgnoreIManageClose = true;
    Cancel = true;
}

加载项已连接，但 addin.Object 始终返回 null。

解决方法

COMAddin.Object 属性不是实现 IDTExtensibility2 等接口的 COM 对象。插件可以潜在地公开一些它明确想要公开的对象。如果不是，它将为空。