如何使用 PSafeArray 从 delphi 调用带有数组的 .NET COM 方法？

发布于 2024-09-02 04:00:30 字数 1609 浏览 2 评论 0原文

我有一个 .NET (4.0) 接口，它是使用 ServicedComponent COM+ 类实现的：

interface DotNetIface
{
    void MethodRef(var System.Guid guid);
    void MethodArray(System.Guid[] guids, params object[] parameters);
    void MethodCStyle([MarshalAs(UnmanagedType.LPArray, ArraySubType=UnmanagedType.Struct, SizeConst=5)]System.Guid[] guids);
}

现在我使用 Delphi 2007 导入向导来导入类型库，并且符合预期我得到以下签名：

procedure MethodRef(var guid : TGuid);
procedure MethodArray(guids : PSafeArray);
procedure MethodCStyle(var guids : ClrGuid /* from mscorlib_TLB */);

如果我现在像这样调用“ref”方法，它工作正常：

procedure CallByRef(guid : TGuid);
var
    test : TGuid;
begin
    test := ...
    comRef.MethodRef(guid);
end;

现在我还需要数组方法

procedure CallArray();
var
    localGuid : TGuid;
    arrayVariant : OleVariant;
begin
    arrayVariant := VarArrayCreate([0,4], varVariant /* dont know here */);
    arrayVariant[0] := localGuid; /* compile error, cannot cast implicitly */

    comRef.MethodArray(PSafeArray(TVarData(arrayVariant.VArray)), /* here this object... PSafeArray works actually*/);
end;

现在最后我尝试使用 ac 数组，

procedure CallCStyle();
var
    localGuid : TGuid;
    arrayOfGuid : array [0..4] of ClrGuid;
begin
    arrayOfGuid[0] := ClrGuid(localGuid);

    comRef.MethodCStyle(PSafeArray(/* now i dont know put it*/, /* here this object... PSafeArray works actually*/);
end;

我真的不知道如何使这个工作。我希望有人对 COM 编组有更多经验谢谢

侧面节点：

我找到了 VT_CLSID，我认为它可以传递给 SafeArrayCreate，但我不知道如何起诉

原文

I have an .NET (4.0) interface which is implemented with a ServicedComponent COM+ class:

interface DotNetIface
{
    void MethodRef(var System.Guid guid);
    void MethodArray(System.Guid[] guids, params object[] parameters);
    void MethodCStyle([MarshalAs(UnmanagedType.LPArray, ArraySubType=UnmanagedType.Struct, SizeConst=5)]System.Guid[] guids);
}

Now I used the Delphi 2007 import wizard to import the type library, and as expected
I get the following signatures:

procedure MethodRef(var guid : TGuid);
procedure MethodArray(guids : PSafeArray);
procedure MethodCStyle(var guids : ClrGuid /* from mscorlib_TLB */);

If i now call the "ref" method like this it works fine:

procedure CallByRef(guid : TGuid);
var
    test : TGuid;
begin
    test := ...
    comRef.MethodRef(guid);
end;

Now I also need the array method

procedure CallArray();
var
    localGuid : TGuid;
    arrayVariant : OleVariant;
begin
    arrayVariant := VarArrayCreate([0,4], varVariant /* dont know here */);
    arrayVariant[0] := localGuid; /* compile error, cannot cast implicitly */

    comRef.MethodArray(PSafeArray(TVarData(arrayVariant.VArray)), /* here this object... PSafeArray works actually*/);
end;

Now lastly i tried with a c array

procedure CallCStyle();
var
    localGuid : TGuid;
    arrayOfGuid : array [0..4] of ClrGuid;
begin
    arrayOfGuid[0] := ClrGuid(localGuid);

    comRef.MethodCStyle(PSafeArray(/* now i dont know put it*/, /* here this object... PSafeArray works actually*/);
end;

I seriously dont know how to make this work.
I hope someone has more experience with COM marshalling
thx

Side node:

I found VT_CLSID which i think can be passed for SafeArrayCreate, but I am not sure how to sue that

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