使用经典的ASP从COM对象中检索字符串数组

I have a .NET class which holds a simple array of strings available via an accessor method, which looks like this;

我有一个。net类，它通过访问器方法保存了一个简单的字符串数组，如下所示;

namespace Foo.Bar {
    [ComVisible(true)]
    [Guid("642279A0-85D4-4c7a-AEF5-A9FAA4BE85E5")]
    public class MyClass {
        private string[] _myArray;
        public MyClass() { }

        public MyClass(string[] myArray) {
            _myArray = myArray;
        }

        public string[] MyArray {
            get { return _myArray; }
        }
    }
}

I consume this class using Classic ASP;

我使用经典的ASP来使用这个类;

Dim foo 
Set foo = Server.CreateObject("Foo.Bar.MyClass")

if IsArray(foo.MyArray) then Response.Write("IsArray") & "<br />"
Response.Write(typename(foo.MyArray)) & "<br />"
Response.Write(UBound(foo.MyArray)) & "<br />"

This results in;

这导致;

IsArray
String()
1

However, when I try to access the contents of the array using;

但是，当我尝试使用;

Response.Write(foo.MyArray(0)) & "<br />"

I get;

我得到;

Microsoft VBScript runtime (0x800A01C2) Wrong number of arguments or invalid property assignment: 'MyArray'

Microsoft VBScript运行时(0x800A01C2)参数数错误或属性分配无效:“MyArray”

Any help is much appreciated.

非常感谢您的帮助。

Edit This is to provide more information after digesting the answers given (thanks)

编辑这是为了提供更多的信息，在消化了答案后(谢谢)

When changing the implementation of the MyArray property to;

将MyArray属性的实现更改为;

public object[] MyArray {
    get { return (object[])_myArray; }
}

I then get the following error,

然后得到下面的错误，

Microsoft VBScript runtime (0x800A000D) Type mismatch: 'MyArray'

Microsoft VBScript运行时(0x800A000D)类型不匹配:“MyArray”

So I tried individually casting each string to an object;

所以我试着把每根弦都投射到一个物体上;

public object[] MyArray {
    get {
        object[] tmp = new object[_myArray.Count()];
        for (int x = 0; x < _myArray.Count(); x++) {
            tmp[x] = (object)_myArray[x];
        }
        return tmp;
    }
}

Then I'm back to,

然后我回来了,

Microsoft VBScript runtime (0x800A01C2) Wrong number of arguments or invalid property assignment: 'MyArray'

Microsoft VBScript运行时(0x800A01C2)参数数错误或属性分配无效:“MyArray”

Edit Final solution with help from How to correctly marshal VB-Script arrays to and from a COM component written in C#

编辑最终的解决方案，帮助您如何正确地编列vb脚本阵列和从c#编写的COM组件。

public object MyArray {
    get { return _myArray.Cast<object>().ToArray(); }
}

VBScript

VBScript

Dim foo 
Set foo = Server.CreateObject("Foo.Bar.MyClass")

bar = foo.MyArray
Response.Write bar(0)

The key was to expose object rather than object[] and as AnthonyWJones suggested, assign the array to a variable before using it.

关键是公开对象而不是对象[]，正如AnthonyWJones所建议的，在使用数组之前将数组分配给一个变量。

Thanks again.

再次感谢。

3 个解决方案

#1

The problem is VBScript cannot actually use an array of String. It can only use an array of Variant.

问题是VBScript实际上不能使用字符串数组。它只能使用一个变体数组。

Try changing MyClass to expose an object[] instead.

尝试更改MyClass以公开一个对象[]。

#2

In addition to Anthony's suggestion

I'm not sure is it the best way but in the past I used a code similar to the following to handle one dimensional arrays.

除了Anthony的建议，我不确定这是否是最好的方法，但在过去，我使用了类似于下面的代码来处理一维数组。

public object MyArray(int ix = -1){
    string[] tmp = new string[] {"one", "two", "3", "4"};
    return (ix == -1) ? (object)tmp : tmp[ix];
}

In ASP:

在ASP:

Response.Write(TypeName(foo.MyArray)) 'string()
Response.Write(TypeName(foo.MyArray(0))) 'string

#3

-1

This code demonstrates how to handle arrays between COM and ASP:

这段代码演示了如何处理COM和ASP之间的数组:

<% @Language="VBScript" %>
<% Option Explicit %>
<%
Dim tcs
Dim rc
Dim vntInput(0,4)
Dim i

vntInput(0,0) = Request.QueryString("strUser")
vntInput(0,1) = Request.QueryString("intCreate")
vntInput(0,2) = Request.QueryString("intDelete")
vntInput(0,3) = Request.QueryString("intModify")
vntInput(0,4) = Request.QueryString("intView") 

Set tcs = Server.CreateObject("TestCases.ArrayFailure")
rc = tcs.AcceptArray(vntInput)

For i = 0 to UBound(vntInput, 2)
    Response.write "Loop Count " & i & " " & vntInput(0,i) & "<BR>"
Next

%>

Here's a link to the article where I found this code:
http://202.102.233.250/b2000/ASP/articles/component/pv990826.htm

下面是我找到这段代码的文章的链接:http://202.102.233.250/b2000/ASP/articles/component/pv990826.htm

#1