如何从 COM 对象 (VB) 读取 Visual C# 2010 中的变体类型
我正在使用微软不久前发布的 FAXCOMEXLib 示例，并尝试将其移植到 C#。我在返回包含字符串数组的 Variant 类型的调用时遇到问题。 “jobID = objFaxDocument.ConnectedSubmit(objFaxServer);”
该过程返回一个消息框，其中显示“System.String[]”。我似乎记得在使用也使用变体的 Delphi 时，变体的一个属性只是一个显示其存储内容的字符串。也许这就是这里发生的事情。但无论如何，我怎样才能得到这个字符串数组并将其转换成 C# 可以理解的东西呢？
感谢
参考文献：
http://support.microsoft.com/kb/317030（显示如何从VB6) http://msdn.microsoft.com/en- us/library/ms692936(v=VS.85).aspx（FAXCOMEXLib 示例）
FAXCOMEXLib.FaxDocument objFaxDocument = new FAXCOMEXLib.FaxDocument();
FAXCOMEXLib.FaxServer objFaxServer = new FAXCOMEXLib.FaxServer();
object jobID;
try {
//Connect to the fax server
objFaxServer.Connect("");
// skipping some code, see MS example in URL above
jobID = objFaxDocument.ConnectedSubmit(objFaxServer);
MessageBox.Show("The Job ID is :" + jobID);
I am working with the FAXCOMEXLib example that microsoft posted awhile back and am trying to port it to C#. I am having trouble with a call that returns a Variant type which holds a string array. "jobID = objFaxDocument.ConnectedSubmit(objFaxServer);"
The procedure returns a messagebox which shows "System.String[]". I seem to recall from working with Delphi which also uses variants, that one property of the variant is just a string which shows what it is storing. Maybe this is what is going on here. But anyway, how can i get this string array out and convert it into something c# would understand?
Thanks
References:
http://support.microsoft.com/kb/317030 (shows how to return a variant from VB6)
http://msdn.microsoft.com/en-us/library/ms692936(v=VS.85).aspx (example for FAXCOMEXLib)
FAXCOMEXLib.FaxDocument objFaxDocument = new FAXCOMEXLib.FaxDocument();
FAXCOMEXLib.FaxServer objFaxServer = new FAXCOMEXLib.FaxServer();
object jobID;
try {
//Connect to the fax server
objFaxServer.Connect("");
// skipping some code, see MS example in URL above
jobID = objFaxDocument.ConnectedSubmit(objFaxServer);
MessageBox.Show("The Job ID is :" + jobID);
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（3）
一个简单的转换就可以解决问题：
A simple cast will do the trick:
如果您知道它是一个字符串数组，只需将结果转换为 string[]：
传入的数据可能实际上是不同对象类型的数组（即异构数组）。在这种情况下，这将起作用（假设第一个元素确实是一个字符串）：
If you know it's a string array, just cast the result to string[]:
It's possible that the incoming data is really an array of distinct object types (i.e., a heterogeneous array). In that case, this will work (assuming the first element is truly a string):
如果您使用 C# 4.0，则应该使用动态“类型”进行研究
If you're working with C# 4.0, you should investigate using dynamic "type"