如何多次调用Com对象 [英] How I Can Calling Com Object Multiple Time

问题描述

我想用c＃调用matlab中的函数来循环使用com组件

当我尝试它时我有这个例外



无效的被叫方。 （HRESULT异常：0x80020010（DISP_E_BADCALLEE））



这是代码

i want to call function in matlab from c# inside for loop using com component
when i tried it i had this exception

Invalid callee. (Exception from HRESULT: 0x80020010 (DISP_E_BADCALLEE))

this is the code

for (int j = 1; j < 8; j++)
            {               
                object result1;
                string name = path + j + ".JPG";
                matlab.Feval("WBC_SegProposed", 6, out result1, name, 0, j);
           ...........//code
}

此指令的例外是matlab.Feval（WBC_SegProposed，6，out result1，name，0，j）;

我该怎么办？

the exception was for this instruction " matlab.Feval("WBC_SegProposed", 6, out result1, name, 0, j);"
what should i do ?

推荐答案

我很遗憾看到上面所有无益的评论，当它真的是Mathwork的时候导致此错误的执行不佳。解决方案是在for循环中简单地包含result = null：

Hi,
I'm sad to see all the unhelpful comments above when it is really Mathwork's poor implementation leading to this error. The solution is to simply include result = null in your for loop:

for (int j = 1; j < 8; j++)
            {               
                object result1 = null; // <---resetting result back to null
                string name = path + j + ".JPG";
                matlab.Feval("WBC_SegProposed", 6, out result1, name, 0, j);
           ...........//code
}

您的代码适用于第一次迭代，因为result默认设置为null。然后在第一次迭代中为它分配一个值，由于在第二次迭代中传递一个非null变量，Feval会抛出一个错误。

your code works for the first iteration because "result" is set to null by default. Then it gets assigned a value in the first iteration and Feval throws an error due to passing a non-null variable in the second iteration.

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