我有一个在idl文件中定义的接口,并尝试将vb6项目转换为vb.net.
转换从这个idl的tlb创建了interop,并且在vs2010中它抱怨该属性没有被实现(如下所示).有谁知道为什么?我甚至删除了实现并让vs2010重新生成存根,但仍然是错误.
idl中的示例界面..
[ uuid(...),
version(2.0),
dual,
nonextensible,
oleautomation
]
interface IExampleInterface : IDispatch
{
...
[id(3), propget]
HRESULT CloseDate ([out, retval] DATE* RetVal);
[id(3), propput]
HRESULT CloseDate ([in] DATE* InVal);
}
VB.Net类……
<System.Runtime.InteropServices.ProgId("Project1_NET.ClassExample")>
Public Class ClassExample
Implements LibName.IExampleInterface
Public Property CloseDate As Date Implements LibName.IExampleInterface.CloseDate
Get
Return mDate
End Get
Set(value As Date)
mDate = value
End Set
End Property
最佳答案 DATE参数类型是问题.它不是DateTime或Date,它是Double.该声明在WTypes.h SDK头文件中给出,第725行为v7.1:
typedef double DATE;
因此,通过将其声明为Double并根据需要来回转换来修复您的属性:
Public Property CloseDate As Double Implements LibName.IExampleInterface.CloseDate
Get
Return mDate.ToOADate
End Get
Set(value As Date)
mDate = DateTime.FromOADate(value)
End Set
End Property