博客园_Sephil的自由空间我的生活，我的梦想http://feed.cnblogs.com/blog/u/13834/rss2011-04-03T05:54:02ZSephilhttp://www.cnblogs.com/sephil/CNBlogs BlogServerhttp://www.cnblogs.com/sephil/archive/2011/04/03/2004384.htmlVC CListCtrl 第一列列宽自适应今天用VC写工具的时候用到CListView,并且ListCtrl的第一列需要自动拉伸,以占满空白区域Delphi做这个设置是很容易的,只要将Column的AutoSize设置为True就可以了不过VC/SDK的AutoSize其实是根据Item的文本长度来自动设置Column Width,跟我的要求不符,只好自己实现了其实很简单,就是觉得麻烦...voidCMyView::AdjustColumnWidth(){RECTrc;CListCtrl&list=GetListCtrl();CHeaderCtrl*pHeader=list.GetHeaderCtrl();if(!pHeade2011-04-03T05:52:00Z2011-04-03T05:52:00ZSephilhttp://www.cnblogs.com/sephil/<p>今天用VC写工具的时候用到CListView,并且ListCtrl的第一列需要自动拉伸,以占满空白区域</p>
<p>Delphi做这个设置是很容易的,只要将Column的AutoSize设置为True就可以了</p>
<p>不过VC/SDK的AutoSize其实是根据Item的文本长度来自动设置Column Width,跟我的要求不符,只好自己实现了</p>
<p>其实很简单,就是觉得麻烦...</p>
<p></p>
<div style="background-color: #F5F5F5;border: 1px solid #CCCCCC;padding-left:5px;padding-right:5px;">
<div><span style="color: #0000ff">void</span><span style="color: #000000"> CMyView::AdjustColumnWidth()<br />{<br /> RECT rc;<br /> CListCtrl</span><span style="color: #000000">&</span><span style="color: #000000"> list </span><span style="color: #000000">=</span><span style="color: #000000"> GetListCtrl();<br /> CHeaderCtrl</span><span style="color: #000000">*</span><span style="color: #000000"> pHeader </span><span style="color: #000000">=</span><span style="color: #000000"> list.GetHeaderCtrl();<br /> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">pHeader)<br /> </span><span style="color: #0000ff">return</span><span style="color: #000000">;<br /><br /> </span><span style="color: #008000">//</span><span style="color: #008000"> 客户区域</span><span style="color: #008000"><br /></span><span style="color: #000000"> list.GetClientRect(</span><span style="color: #000000">&</span><span style="color: #000000">rc);<br /> </span><span style="color: #0000ff">int</span><span style="color: #000000"> nColCount </span><span style="color: #000000">=</span><span style="color: #000000"> pHeader</span><span style="color: #000000">-></span><span style="color: #000000">GetItemCount();<br /> </span><span style="color: #008000">//</span><span style="color: #008000"> 去掉其他列占用的宽度</span><span style="color: #008000"><br /></span><span style="color: #000000"> </span><span style="color: #0000ff">for</span><span style="color: #000000"> (</span><span style="color: #0000ff">int</span><span style="color: #000000"> i </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800080">1</span><span style="color: #000000">; i </span><span style="color: #000000"><</span><span style="color: #000000"> nColCount; i</span><span style="color: #000000">++</span><span style="color: #000000">)<br /> {<br /> rc.right </span><span style="color: #000000">-=</span><span style="color: #000000"> list.GetColumnWidth(i);<br /> }<br /><br /> </span><span style="color: #008000">//</span><span style="color: #008000"> 去掉滚动条占用的宽度</span><span style="color: #008000"><br /></span><span style="color: #000000"> SCROLLBARINFO sbi;<br /> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (list.GetScrollBarInfo(OBJID_VSCROLL, </span><span style="color: #000000">&</span><span style="color: #000000">sbi))<br /> {<br /> rc.right </span><span style="color: #000000">-=</span><span style="color: #000000"> sbi.rcScrollBar.right </span><span style="color: #000000">-</span><span style="color: #000000"> sbi.rcScrollBar.left;<br /> }<br /><br /> </span><span style="color: #008000">//</span><span style="color: #008000"> 修改列宽</span><span style="color: #008000"><br /></span><span style="color: #000000"> list.SetColumnWidth(</span><span style="color: #800080">0</span><span style="color: #000000">, rc.right </span><span style="color: #000000">></span><span style="color: #000000"> rc.left </span><span style="color: #000000">?</span><span style="color: #000000"> rc.right </span><span style="color: #000000">-</span><span style="color: #000000"> rc.left : LVSCW_AUTOSIZE_USEHEADER);<br />}</span></div></div>
<p></p>
<p>使用方法:在OnSize消息中调用一下AdjustColumnWidth就好了</p>
<div style="background-color: #F5F5F5;border: 1px solid #CCCCCC;padding-left:5px;padding-right:5px;">
<div><span style="color: #0000ff">void</span><span style="color: #000000"> CMyView::OnSize(UINT nType, </span><span style="color: #0000ff">int</span><span style="color: #000000"> cx, </span><span style="color: #0000ff">int</span><span style="color: #000000"> cy)<br />{<br /> CListView::OnSize(nType, cx, cy);<br /><br /> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (GetListCtrl().GetSafeHwnd())<br /> AdjustColumnWidth();<br />}</span></div></div>
<p></p><img src="http://www.cnblogs.com/sephil/aggbug/2004384.html?type=1" width="1" height="1" alt=""/><p><a href="http://www.cnblogs.com/sephil/archive/2011/04/03/2004384.html" target="_blank">本文链接</a></p>http://www.cnblogs.com/sephil/archive/2011/03/18/1988350.htmlWriteFile写磁盘扇区是87错误的原因今天在写个工具,功能是将一些数据写到磁盘的绝对扇区上.但是发现ReadFile没问题,可是WriteFile总是报87错误(参数不正确).Google上查了一会,发现碰到问题的人不少,可惜没有正确答案....没辙,还是啃MSDN,终于还是自己解决了~呵呵赶紧记下来,免得忘了...其实主要是写入的数据大小,必须是BytesOfSector大小的倍数,一般是512字节,ReadFile却无所谓...另外,MSDN上还说,WriteFile前最好先用FSCTL_LOCK_VOLUME或者FSCTL_DISMOUNT_VOLUME将磁盘锁定或卸载,不过我试下来好像没什么影响...代码摘录如下:1UIN2011-03-18T10:18:00Z2011-03-18T10:18:00ZSephilhttp://www.cnblogs.com/sephil/<p><span style="font-family: Arial">今天在写个工具,功能是将一些数据写到磁盘的绝对扇区上.</span></p>
<p><span style="font-family: Arial">但是发现ReadFile没问题,可是WriteFile总是报87错误(参数不正确).</span></p>
<p><span style="font-family: Arial">Google上查了一会,发现碰到问题的人不少,可惜没有正确答案....</span></p>
<p><span style="font-family: Arial">没辙,还是啃MSDN,终于还是自己解决了~呵呵</span></p>
<p><span style="font-family: Arial">赶紧记下来,免得忘了...</span></p>
<p></p>
<p><span style="font-family: Arial">其实主要是写入的数据大小,必须是BytesOfSector大小的倍数,一般是512字节,ReadFile却无所谓...</span></p>
<p><span style="font-family: Arial">另外,MSDN上还说,WriteFile前最好先用</span><strong style="font-family: Arial">FSCTL_LOCK_VOLUME</strong><span style="font-family: Arial">或者</span><strong>FSCTL_DISMOUNT_VOLUME</strong>将磁盘锁定或卸载,不过我试下来好像没什么影响...</p>
<p><font face="Arial">代码摘录如下:</font></p>
<p></p>
<div style="background-color: #F5F5F5;border: 1px solid #CCCCCC;padding-left:5px;padding-right:5px;">
<div><span style="color: #008080"> 1</span> <span style="color: #000000">UINT CDevInfo::Write(LPVOID pData, UINT nSize)<br /></span><span style="color: #008080"> 2</span> <span style="color: #000000">{<br /></span><span style="color: #008080"> 3</span> <span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">pData </span><span style="color: #000000">&&</span><span style="color: #000000"> nSize </span><span style="color: #000000"><=</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">)<br /></span><span style="color: #008080"> 4</span> <span style="color: #000000"> </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">;<br /></span><span style="color: #008080"> 5</span> <span style="color: #000000"><br /></span><span style="color: #008080"> 6</span> <span style="color: #000000"> TCHAR szDevName[</span><span style="color: #800080">30</span><span style="color: #000000">];<br /></span><span style="color: #008080"> 7</span> <span style="color: #000000"> _stprintf(szDevName, _T(</span><span style="color: #800000">"</span><span style="color: #800000">\\\\.\\PHYSICALDRIVE%d</span><span style="color: #800000">"</span><span style="color: #000000">), m_nDevNum); // DeviceNumber<br /></span><span style="color: #008080"> 8</span> <span style="color: #000000"><br /></span><span style="color: #008080"> 9</span> <span style="color: #000000"> HANDLE hDev </span><span style="color: #000000">=</span><span style="color: #000000"> ::CreateFile(szDevName, GENERIC_WRITE, FILE_SHARE_READ </span><span style="color: #000000">|</span><span style="color: #000000"> FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, NULL);<br /></span><span style="color: #008080">10</span> <span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (hDev </span><span style="color: #000000">==</span><span style="color: #000000"> INVALID_HANDLE_VALUE)<br /></span><span style="color: #008080">11</span> <span style="color: #000000"> </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">;<br /></span><span style="color: #008080">12</span> <span style="color: #000000"><br /></span><span style="color: #008080">13</span> <span style="color: #000000"> DWORD dwCount;<br /></span><span style="color: #008080">14</span> <span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">::DeviceIoControl(hDev, FSCTL_LOCK_VOLUME, NULL, </span><span style="color: #800080">0</span><span style="color: #000000">, NULL, </span><span style="color: #800080">0</span><span style="color: #000000">, </span><span style="color: #000000">&</span><span style="color: #000000">dwCount, NULL))<br /></span><span style="color: #008080">15</span> <span style="color: #000000"> </span><span style="color: #0000ff">return</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">;<br /></span><span style="color: #008080">16</span> <span style="color: #000000"><br /></span><span style="color: #008080">17</span> <span style="color: #000000"> DWORD dwWritten(</span><span style="color: #800080">0</span><span style="color: #000000">);<br /></span><span style="color: #008080">18</span> <span style="color: #000000"> ::SetFilePointer(hDev, SECTOR_NUM </span><span style="color: #000000">*</span><span style="color: #000000"> GetSectorSize(), NULL, FILE_BEGIN);<br /></span><span style="color: #008080">19</span> <span style="color: #000000"> </span><span style="color: #0000ff">if</span><span style="color: #000000"> (</span><span style="color: #000000">!</span><span style="color: #000000">::WriteFile(hDev, pData, nSize, </span><span style="color: #000000">&</span><span style="color: #000000">dwWritten, NULL))<br /></span><span style="color: #008080">20</span> <span style="color: #000000"> dwWritten </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #800080">0</span><span style="color: #000000">;<br /></span><span style="color: #008080">21</span> <span style="color: #000000"> <br /></span><span style="color: #008080">22</span> <span style="color: #000000"> ::DeviceIoControl(hDev, FSCTL_UNLOCK_VOLUME, NULL, </span><span style="color: #800080">0</span><span style="color: #000000">, NULL, </span><span style="color: #800080">0</span><span style="color: #000000">, </span><span style="color: #000000">&</span><span style="color: #000000">dwCount, NULL);<br /></span><span style="color: #008080">23</span> <span style="color: #000000"> ::CloseHandle(hDev);<br /></span><span style="color: #008080">24</span> <span style="color: #000000"> </span><span style="color: #0000ff">return</span><span style="color: #000000"> dwWritten;<br /></span><span style="color: #008080">25</span> <span style="color: #000000">}</span></div></div>
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