如何使用 C# 中的版本化 COM 接口？
如何创建已扩展的 COM 组件的实例并对其进行调用？
然而，这个COM组件已经通过接口继承的方式进行了扩展。以 IDL 表示（使用 OLE/COM 对象查看器 [OleView.Exe])：
interface IXRawfile3 : IXRawfile2 {
.
.
interface IXRawfile2 : IXRawfile {
.
.
interface IXRawfile : IDispatch {
.
.
coclass XRawfile {
[default] interface IXRawfile;
};
完整提取的 XRawFile2.dll 的 IDL 可用（带
的 HTML 页面）。
我想使用新界面 (IXRawfile3) 中可用的函数，
GetMassListRangeFromScanNum()
而不是
GetMassListFromScanNum()
原始界面 (IXRawfile) 中的函数。
我可以轻松创建 XRawFile 实例并调用 GetMassListFromScanNum()。
但我无法让它与 GetMassListRangeFromScanNum() 一起使用。例如，对 XRawFile 实例使用 GetMassListRangeFromScanNum() 会出现以下编译错误：
Error 1 'XRAWFILE2Lib.XRawfile' does not contain a
definition for 'GetMassListRangeFromScanNum' and no
extension method 'GetMassListRangeFromScanNum' accepting a
first argument of type 'XRAWFILE2Lib.XRawfile' could be
found (are you missing a using directive or an assembly
reference?)
试用 C# 源代码也可用。
平台：Windows XP 64 位 SP2。 Visual Studio 2008。XRawFile2.dll 的互操作文件是由 Visual Studio 2008 以正常方式创建的。
How do I make instances of and calls to COM components that have been extended?
I have used a third-party COM component (XRawFile2.dll from Finnigan/ Thermo Scientific) for many years in a mass spectrometry-related application written in .NET (mixed VB.NET and C#) for accessing raw spectrum data. This has worked well.
However, this COM component has been extended by way of interface inheritance. Expressed in IDL (extracted using the OLE/COM Object Viewer [OleView.Exe]):
interface IXRawfile3 : IXRawfile2 {
.
.
interface IXRawfile2 : IXRawfile {
.
.
interface IXRawfile : IDispatch {
.
.
coclass XRawfile {
[default] interface IXRawfile;
};
The full extracted IDL for XRawFile2.dll is available (HTML page with <pre>).
I want to use a function available in the new interface (IXRawfile3),
GetMassListRangeFromScanNum()
instead of
GetMassListFromScanNum()
in the original interface (IXRawfile).
I have no trouble creating an instance of XRawFile and calling GetMassListFromScanNum().
But I can't get it to work with GetMassListRangeFromScanNum(). For instance, using GetMassListRangeFromScanNum() for an instance of XRawFile gives this compile error:
Error 1 'XRAWFILE2Lib.XRawfile' does not contain a
definition for 'GetMassListRangeFromScanNum' and no
extension method 'GetMassListRangeFromScanNum' accepting a
first argument of type 'XRAWFILE2Lib.XRawfile' could be
found (are you missing a using directive or an assembly
reference?)
The tryout C# source code is also available.
Platform: Windows XP 64 bit SP2. Visual Studio 2008. The interop file for XRawFile2.dll was created by Visual Studio 2008 in the normal manner.
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尝试将 XRawFile 实例转换为 IXRawfile3
，例如
这应该在 COM 对象上执行一个查询接口，请求它提供 IXRawfile3 接口。 （假设您导入的类型库与 XRawfile 的实现匹配）
Try casting your instance of XRawFile to IXRawfile3
e.g.
This should do a query interface on the COM object, asking it for the IXRawfile3 interface. (Assuming the typelib you have imported does match the implementation of XRawfile)
我建议使用以下语句（对于版本 2.2）：
这可能会给您带来强烈的感受。
您可以稍后调用任何方法。
I would suggest to use the following statement (for version 2.2):
This could simply give you an intense.
You may call any of the methods later.