传递的字节数组从ActiveX来的JavaScript，反之亦然 [英] Passing array of bytes from ActiveX to javascript and vice versa

问题描述

我需要传递的数据（字节数组，即字符*）从ActiveX对象（使用Visual C ++与ATL）到我的javascript code（反之亦然）。我已经挖了网络对于这样的问题，并试图解决方案很多，但都没有成功。我已经试过如下：

• 转换的char *为BSTR并把它传递给JavaScript（JS），但我的结果是JS由于我的数据的性质不是字符串。

  //在C ++：
STDMETHODIMP CActiveXObj :: F（BSTR * MSG）//味精是ATL自动化函数的返回值
{
    字符*缓冲区; //字节的数据存储在缓冲
    *味精= SysAllocStringByteLen（（LPCSTR）缓冲液，缓冲区长度+ 1）;
}
////////////////////////////////////////////////// ////////////////////////
//在JavaScript中：
VAR MyObj中=新的ActiveXObject（IGCE.ActiveXObj）;
VAR的结果= myobj.f（）; //结果=
 

• 从C中传递字节数据的安全数组++

任何人都可以请给我以最简单的形式工作code？

非常感谢你！

克莉丝汀

解决方案

  //在* .idl文件
[propget子，ID（0）] HRESULT ArrayProperty（[出，RETVAL] SAFEARRAY（VARIANT）*粒子阵列）;
[propput，ID（0）] HRESULT ArrayProperty（[IN] SAFEARRAY（VARIANT）阵列）;
//某处在JavaScript功能ax2js（axArray）{
    返回新的VBArray（阵列）.toArray（）;
}功能js2ax（jsArray）{
    VAR字典=新的ActiveXObject（的Scripting.Dictionary）;    对于（VAR I = 0; I＆LT; jsArray.length;我++）{
        dict.add（ⅰ，jsArray [I]）;
    }    返回dict.Items（）;
}功能fooHandler（）{
    变种AX =新的ActiveXObject（My.My）;    VAR AR = ax2js（ax.ArrayProperty）;    ax.ArrayProperty = js2ax（AR）;
}
 

I need to pass data (byte array, i.e char*) from ActiveX object (using Visual C++ with ATL) to my javascript code (and vice versa). I've digged the Web for such problem and tried lots of solutions but have not succeeded. I've tried the followings:

• Converting char* to BSTR and pass it to javascript (JS), but my result in JS is "", due to the nature of my data is not string.

//in C++:
STDMETHODIMP CActiveXObj::f(BSTR* msg) // msg is the return value in ATL automation function
{
    char *buffer; // byte data is stored in buffer
    *msg = SysAllocStringByteLen((LPCSTR)buffer, bufferLen+1);
}
//////////////////////////////////////////////////////////////////////////
//in JavaScript:
var myobj= new ActiveXObject("IGCE.ActiveXObj");
var result = myobj.f(); // result = ""

• Pass safe array of byte data from C++

Could anyone please give me the working code in its simplest form?

Thank you very much!

Kristin

解决方案

// In *.idl file 
[propget, id(0)] HRESULT ArrayProperty([out, retval] SAFEARRAY(VARIANT) *pArray);
[propput, id(0)] HRESULT ArrayProperty([in] SAFEARRAY(VARIANT) Array);


// Somewhere in javascript

function ax2js(axArray) {    
    return new VBArray(array).toArray();
}

function js2ax(jsArray) {
    var dict = new ActiveXObject("Scripting.Dictionary");

    for (var i = 0; i < jsArray.length; i++) {
        dict.add(i, jsArray[i]);
    }

    return dict.Items();
}

function fooHandler() {
    var ax = new ActiveXObject("My.My");

    var ar = ax2js(ax.ArrayProperty);

    ax.ArrayProperty = js2ax(ar);
}

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