100165818.htm
来自「C#高级编程(第三版),顶死你们。。 。up」· HTM 代码 · 共 274 行 · 第 1/3 页
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">成员可以由派生类重写</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">abstract</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">仅函数成员</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">虚拟成员定义了成员的签名，但没有提供实现</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt; WORD-BREAK: break-all; TEXT-ALIGN: right" align="right"><span lang="EN-US"> (</span><span style="FONT-FAMILY: 宋体">续表</span><span lang="EN-US">) </span></p>
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<p class="a2"><span style="FONT-FAMILY: 黑体">修</span><span lang="EN-US"> </span><span style="FONT-FAMILY: 黑体">饰</span><span lang="EN-US"> </span><span style="FONT-FAMILY: 黑体">符</span></p>
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<p class="a2"><span style="FONT-FAMILY: 黑体">应</span><span lang="EN-US"> </span><span style="FONT-FAMILY: 黑体">用</span><span lang="EN-US"> </span><span style="FONT-FAMILY: 黑体">于</span></p>
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<p class="a2"><span style="FONT-FAMILY: 黑体">说</span><span lang="EN-US"> </span><span style="FONT-FAMILY: 黑体">明</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">override</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">仅函数成员</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">成员重写了继承的虚拟或抽象成员</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">sealed</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">类</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">成员重写了继承的虚拟成员，但继承该类的任何类都不能重写该成员。该修饰符必须与</span><span lang="EN-US">override</span><span style="FONT-FAMILY: 宋体">一起使用</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span lang="EN-US">extern</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">仅静态</span><span lang="EN-US">[DllImport]</span><span style="FONT-FAMILY: 宋体">方法</span></p>
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<p class="a4" style="MARGIN-LEFT: 10.7pt"><span style="FONT-FAMILY: 宋体">成员在外部用另一种语言实现</span></p>
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<p class="MsoNormal"><span lang="EN-US"> </span></p>
<p class="MsoNormal"><span style="FONT-FAMILY: 宋体">在这些修饰符中，</span><span lang="EN-US">internal </span><span style="FONT-FAMILY: 宋体">和</span> <span lang="EN-US">protected internal</span><span style="FONT-FAMILY: 宋体">是</span><span lang="EN-US">C#</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US">.NET Framework</span><span style="FONT-FAMILY: 宋体">新增的内容。</span><span lang="EN-US">internal</span><span style="FONT-FAMILY: 宋体">与</span><span lang="EN-US">public</span><span style="FONT-FAMILY: 宋体">类似，但访问仅限于同一个程序集中的其他代码，换言之，代码在同一个程序中同时编译。可以使用</span><span lang="EN-US">internal</span><span style="FONT-FAMILY: 宋体">确保编写的其他类都可以访问某一成员，但同时在其他公司编写的其他代码中隐藏它们。</span><span lang="EN-US">protected internal</span><span style="FONT-FAMILY: 宋体">合并了</span><span lang="EN-US">protected</span><span style="FONT-FAMILY: 宋体">和</span><span lang="EN-US">internal</span><span style="FONT-FAMILY: 宋体">，但这是一种</span><span lang="EN-US">OR</span><span style="FONT-FAMILY: 宋体">合并，而不是</span><span lang="EN-US">AND</span><span style="FONT-FAMILY: 宋体">合并。</span><span lang="EN-US">protected internal</span><span style="FONT-FAMILY: 宋体">成员在同一个程序集的任何代码中都可见，在派生类中也可见，甚至在其他程序集中也可见。</span></p></div>
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<h1 id="divCurrentNode2" style="color: #b83507; width: 100%; text-align: left; font-size: 12px; padding-left: 2px">当前章节:<a href='100165818.htm'><font color='red'>4.3 修饰符</font></a></h1>
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<div style='float:left;width:49%'>·<a href='100165815.htm'>32.8 小结</a></div><div style='float:right;width:49%'>·<a href='100165816.htm'>4.1 继承的类型</a></div><div style='float:left;width:49%'>·<a href='100165817.htm'>4.2 实现的继承</a></div><div style='float:right;width:49%'>·<a href='100165819.htm'>4.4 接口</a></div><div style='float:left;width:49%'>·<a href='100165826.htm'>4.5 小结</a></div></div>
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