[英]Passing array of strings from C# to C++ Com
我需要將字符串數組從C#模塊傳遞到C ++ COM組件。 以下是idl聲明;
[id(11), helpstring("method deleteObjectsEx")] HRESULT deleteObjectsEx(
[in] BSTR userName,
[in] BSTR userPasswd,
[in] SAFEARRAY(VARIANT) varValues,
[in] BSTR deleteMode
);
在C#中,我們使用以下代碼來調用API
List<string> ObjectIDS = new List<string>();
ObjectIDS.Add(obj._ObjectId[0]);
ObjectIDS.Add(obj._ObjectId[1]);
/*Array ar = Array.CreateInstance(typeof(string), size);
ar.SetValue(obj._ObjectId[0], 0);
ar.SetValue(obj._ObjectId[1], 1);*/
mhubBridge.deleteObjectsEx(Encrypt(auth.UserName),
Encrypt(auth.UserPassword),
ObjectIDS.ToArray(),
obj._delMEthod);
在調用deleteObjectsEx API時,我得到“類型為System.Runtime.InteropServices.SafeArrayTypeMismatchException occurred in IPDWebService.DLL IPDWS::trace::(Tuesday, 06 August 2013 13:27): Exception in deleteObjectsEx:: message - Specified array was not of the expected type.
第一次機會異常System.Runtime.InteropServices.SafeArrayTypeMismatchException occurred in IPDWebService.DLL IPDWS::trace::(Tuesday, 06 August 2013 13:27): Exception in deleteObjectsEx:: message - Specified array was not of the expected type.
( 不起作用 )
嘗試使用ar
數組。
mhubBridge.deleteObjectsEx(Encrypt(auth.UserName),
Encrypt(auth.UserPassword),
ar,
obj._delMEthod);
如果ObjectIDS
,請刪除所有ObjectIDS
“物件”。
或嘗試:
( 工作中 )
object[] ar = new object[] { obj._ObjectId[0], obj._ObjectId[1] };
並將其傳遞給deleteObjectsEx(...)
因為從技術上講, VARIANT
是object
,所以SAFEARRAY(VARIANT)
是object[]
。
嘗試這個:
object[] ar = new object[2];
ar [0] = obj._ObjectId[0];
ar [1] = obj._ObjectId[1];
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