找回密码
 立即注册

QQ登录

只需一步,快速开始

扫一扫,访问微社区

查看: 541|回复: 0

Accessing text elements in a safearray

[复制链接]

已领礼包: 40个

财富等级: 招财进宝

发表于 2021-1-11 20:34:37 | 显示全部楼层 |阅读模式

马上注册,结交更多好友,享用更多功能,让你轻松玩转社区。

您需要 登录 才可以下载或查看,没有账号?立即注册

×

问题:
ActiveX interfaces are accessible in C++ through the COM 'wrappers' as the doc
sample, AsdkMfcComSamps. When I used IAcadLayout::GetPlotDeviceNames(), it
returns a VARIANT type 8200. In this case, a string Array.

How do I access the elements in it? Attaching or creating SafeArrays of
COleSafeArray is successful and the upper and lower bounds are clear but I
cannot reach the data (strings).

解答:
This can be done by using some of the safe array global functions. The following
code sample demonstrates how to achieve this.
  1. bool GetStringListFromSafeArray(SAFEARRAY *psaItemTexts, CStringList &strNodes)
  2. {
  3.    ASSERT (psaItemTexts);
  4.    ULONG ulDims = SafeArrayGetDim(psaItemTexts);
  5.    ASSERT (1 == ulDims);
  6.    if (!psaItemTexts || 1 != ulDims)
  7.             return false;

  8.    // see if we are given more than one items
  9.    long lLBound, lUBound; // note that dimension indices are one-based
  10.    HRESULT hRes = SafeArrayGetUBound (psaItemTexts, 1, &lUBound);
  11.    ASSERT (SUCCEEDED(hRes));
  12.    if (FAILED (hRes))
  13.             return false;

  14.    hRes = SafeArrayGetLBound (psaItemTexts, 1, &lLBound);
  15.    ASSERT (SUCCEEDED(hRes));
  16.    if (FAILED (hRes))
  17.             return false;

  18.    // AcDcss the array
  19.    BSTR *pabstrItemTexts = 0;
  20.    hRes = ::SafeArrayAccessData (psaItemTexts, (void**)&pabstrItemTexts);
  21.    ASSERT (SUCCEEDED (hRes));
  22.    if (FAILED (hRes))
  23.             return false;

  24.    strNodes.RemoveAll ();
  25.    USES_CONVERSION;
  26.    for (long lName = lLBound; lName <= lUBound; lName ++)
  27.             strNodes.AddTail (OLE2T (pabstrItemTexts [lName]));
  28.    // release pointer returned by SafeArrayAcDcssData
  29.    SafeArrayUnaccessData (psaItemTexts);

  30.    return true;
  31. }


论坛插件加载方法
发帖求助前要善用【论坛搜索】功能,那里可能会有你要找的答案;
如果你在论坛求助问题,并且已经从坛友或者管理的回复中解决了问题,请把帖子标题加上【已解决】;
如何回报帮助你解决问题的坛友,一个好办法就是给对方加【D豆】,加分不会扣除自己的积分,做一个热心并受欢迎的人!
您需要登录后才可以回帖 登录 | 立即注册

本版积分规则

QQ|申请友链|Archiver|手机版|小黑屋|辽公网安备|晓东CAD家园 ( 辽ICP备15016793号 )

GMT+8, 2024-5-25 17:14 , Processed in 0.344691 second(s), 25 queries , Gzip On.

Powered by Discuz! X3.5

© 2001-2024 Discuz! Team.

快速回复 返回顶部 返回列表