subject_28704.htm

一些关于vc的问答

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序号：28704 发表者：里弄 发表日期：2003-01-23 13:51:36
<br>主题：这样为什么得不到的view的指针？？
<br>内容：: POSITION pos = GetFirstViewPosition(); <BR>: while (pos != NULL) <BR>: { <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CView* pView = pDoc-&gt;GetNextView(pos); <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(pView-&gt;IsKindOf(RUNTIME_CLASS(CYourView))) <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; p = (CYourView*)pView; <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; break; <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} <BR>：}<BR>这样的不到需要的指针<BR><BR>我的程序是 mdi ，如果改成下面这样：&nbsp;&nbsp;<BR>POSITION pos = GetFirstViewPosition(); <BR> CView* pView = GetNextView(pos); <BR> CGridViewDemoView* p = (CGridViewDemoView*)pView; <BR>是没问题的 <BR>加上循环和判定就fail <BR>&nbsp;&nbsp;<BR>我实际需要的是多个视图 <BR>所以还必须按照上述的那样做 <BR><BR>&nbsp;&nbsp;<BR>你觉得是什么问题呢？ <BR>
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回复者：mm2003 回复日期：2003-01-27 22:43:45
<br>内容：你的那句IF语句有问题，PVIEW判断之前是CVIEW类
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回复者：lin 回复日期：2003-01-28 08:54:51
<br>内容：if(pView-&gt;IsKindOf(RUNTIME_CLASS(CYourView)))<BR><BR>应该改成if(pView-&gt;IsKindOf(RUNTIME_CLASS(CView)))<BR>或&nbsp;&nbsp;&nbsp;&nbsp;if(pView-&gt;IsKindOf(RUNTIME_CLASS(CFormView)))<BR>应为视图得基类，视你情况而定
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回复者：里弄 回复日期：2003-01-28 09:33:14
<br>内容：但是我用的是multiview<BR>而且所有view的基类都是CVIEW<BR>如何得到每一个view的指针？
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<font color=red>答案被接受</font><br>回复者：tjhe 回复日期：2003-01-28 11:02:07
<br>内容：: POSITION pos = GetFirstViewPosition(); <BR>: while (pos != NULL) <BR>: { <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CView* pView = pDoc-&gt;GetNextView(pos); <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if(pView-&gt;IsKindOf(RUNTIME_CLASS(CYourView))) <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; p = (CYourView*)pView; <BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; continue;&nbsp;&nbsp; //修改这里试试，或去掉词句也可<BR>:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;} <BR>：}<BR>
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回复者：里弄 回复日期：2003-01-28 18:33:39
<br>内容：yeah!<BR>that really works!<BR><BR>Thanks and I will try to use it lately!<BR><BR>88<BR><BR>新年快乐！<BR>
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