无法将类型为"System.Single [*]"的对象转换为类型为"System.Single []"的对象 [英] Unable to cast object of type 'System.Single[*]' to type 'System.Single[]

问题描述

我正在尝试通过COM连接到Multiframe. COM对象(Multiframe.SectionList mySectionList)返回float类型的一维数组，该数组的第一个元素的索引为1而不是0.
这就是为什么我必须创建第一个索引为1而不是0的数组的原因(请参见CreateArray)

Hi,

I''m trying to connect to Multiframe via COM. The COM object (Multiframe.SectionList mySectionList) returns a single dimension array of type float with the first element of the array having index 1 rather than 0.
This is why I have to create an array with first index being 1 rather than 0 (see CreateArray)

class SectionListArray
{
        Array myDs;

        public SectPropArray(){}

        ~SectPropArray(){}
        public void Add(ref Multiframe.SectionList mySectionList)
        {
                int nMem = myMemberList.Count;
                CreateArrays(nMem);
                FillArrays(mySectionList);
        }
        private void CreateArrays(int nMem)
        {
                int[] myLengthsArray = new int[1] { nMem };
                int[] myBoundsArray = new int[1] { 1 };
                myDs = Array.CreateInstance(typeof(double), myLengthsArray, myBoundsArray);//Depth D
        }
        private void FillArrays(Multiframe.SectionList mySectionList)
        {
                myDs = (Array)mySectionList.D;
        }
}

当我从VS2008转换为VS2010时，没有警告或错误.确切的代码在VS2008中完美执行.错误消息无法将类型为"System.Single [*]"的对象强制转换为类型为"System.Single [].

我将代码升级到VS2010，以利用.NET 4中的并行编程功能，但在问题得到解决之前，我可能必须还原到VS2008.

When I converted from VS2008 to VS2010 there were no warnings or errors. The exact code executed perfectly in VS2008. The error message is Unable to cast object of type ''System.Single[*]'' to type ''System.Single[].

I upgraded the code to VS2010 to utilise Parallel Programming features in .NET 4 but I may have to revert back to VS2008 until the problem is sorted.

推荐答案

System.Single[*] 表示数组的下界不是零.这个COM对象是不是偶然在经典VB中创建的?


----------

只是注意到您有意创建了一个基于1的数组.据我所知，

System.Single[*] indicates that the array has a lower bound other than zero. Was this COM object created in classic VB by any chance?


----------

Just noticed that you intentionally create a 1-based array. Is that really required there?

COM对象是在VisualC ++中创建的.该数组返回的是一个基于1的数组，我尝试创建一个基于0的数组，但是在VS2008中不起作用.

The COM object was created in VisualC++ as far I as I''m aware. The array comes back is a 1-based array, I tried creating a 0-based array but that wouldn''t work in VS2008.

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