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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black"> </span><span style="mso-tab-count: 1; font-size: 10.0pt; font-family: Arial; mso-bidi-font-family: Times New Roman; color: black" lang="EN-US">
</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">这是一个普通的</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">DataSet</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">组件<span lang="EN-US">,他没有内置提供器的机制.
即便没有默认的提供器,他仍然可以被用于恢复数据资源中的数据.
列和数据, 可以通过</span></span><span lang="EN-US" style="font-size:10.0pt;font-family:
Arial;mso-bidi-font-family:"Times New Roman";color:black">DataSet</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">的方法或是从</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">DataFile</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">组件<span lang="EN-US">(如:</span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">TextDataFile)</span><span style="font-size:10.0pt;font-family:
宋体;mso-hansi-font-family:Arial;color:black">中导入的办法<span lang="EN-US">,
加进一个</span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">TableDataSet.<o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"> </span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:
Arial;color:black"> </span><span style="font-size: 10.0pt; font-family: Arial; color: black; mso-bidi-font-family: Times New Roman" lang="EN-US">
</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:
Arial;color:black">与行相关的类在</span><span lang="EN-US" style="font-size:10.0pt;
font-family:Arial;mso-bidi-font-family:"Times New Roman";color:black">DataExpress
API </span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:
Arial;color:black">中很广泛的被应用着<span lang="EN-US">. </span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">ReadRow</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">和</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">ReadWriteRow</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">使用起来更象是指出使用意图的接口<span lang="EN-US">.
通过使用类的层次, 实施过程是分享的,
在这里有很多细微的性能优势要比使用接口</span></span><span lang="EN-US" style="font-size:
10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";color:black">(interface)</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">好</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">.<o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"> </span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:
Arial;color:black">类关于</span><span lang="EN-US" style="font-size:10.0pt;
font-family:Arial;mso-bidi-font-family:"Times New Roman";color:black">DataSet</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">方法的层次结构如下所示<span lang="EN-US">:<o:p>
</o:p>
</span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black"> </span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black">java.lang.Object<o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"><span style="mso-spacerun:
yes"> </span>+----</span><u><span lang="EN-US" style="font-size:10.0pt;
font-family:Arial;mso-bidi-font-family:"Times New Roman";color:blue">com.borlangd.dx.dataset.ReadRow</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black"><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"><span style="mso-tab-count:
1"> </span><span style="mso-spacerun: yes">
</span>+----</span><u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:blue">com.borland.dx.dataset.ReadWriteRow</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black"><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"><span style="mso-tab-count:
1"> </span><span style="mso-tab-count:1">
</span><span style="mso-spacerun: yes"> </span>+----</span><u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:blue">com.borland.dx.dataset.DataSet</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black"><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"><span style="mso-tab-count:
1"> </span><span style="mso-tab-count:1">
</span><span style="mso-spacerun: yes"> </span>+----</span><u><span lang="EN-US" style="font-size:10.0pt;font-family:
Arial;mso-bidi-font-family:"Times New Roman";color:blue">com.borland.dx.dataset.StorageDataSet</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black"><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"><span style="mso-tab-count:
1"> </span><span style="mso-tab-count:1">
</span><span style="mso-spacerun: yes"> </span>+----com.borland.dx.sql.dataset.QueryDataSet<span style="mso-tab-count:
1"> </span><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black"> </span><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">
</span><span style="font-size: 10.0pt; font-family: Arial; color: black; mso-bidi-font-family: Times New Roman" lang="EN-US">
</span><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span lang="EN-US" style="font-size:10.0pt;font-family:
Arial;mso-bidi-font-family:"Times New Roman";color:black">StorageDataSet</span><span style="font-size:
10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">方法处理</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">DataSet</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">的结构<span lang="EN-US"><o:p>
</o:p>
</span></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-36.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">
·</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black">DataSet</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">方法用于导航<span lang="EN-US"><o:p>
</o:p>
</span></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-36.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">
·</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black">ReadWriteRow</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">方法让你在当前行里编辑列<span lang="EN-US"><o:p>
</o:p>
</span></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-36.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">
·</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black">ReadRow</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">方法提供对当前行中列的读访问<span lang="EN-US"><o:p>
</o:p>
</span></span></p>
<p class="MsoNormal" style="margin-left:36.0pt;text-indent:-36.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:10.0pt;font-family:Symbol;color:black">
·</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;
mso-bidi-font-family:"Times New Roman";color:black">TableDataSet</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">和</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">QueryDataSet</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">把所有的方法分层<span lang="EN-US"><o:p>
</o:p>
</span></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black"> </span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:
Arial;color:black"><span lang="EN-US"> </span>下个部分<span lang="EN-US">,
</span></span><u><span lang="EN-US" style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:blue">"</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:blue">Understanding<span style="mso-spacerun: yes"> </span>JBuilder's
DataExpress architecture",</span></u><span lang="EN-US" style="font-size:
10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";color:black">
(</span><span style="font-size:10.0pt;font-family:宋体;mso-hansi-font-family:Arial;color:black">明白</span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">JBuilder</span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">数据表达结构<span lang="EN-US">),
将会详细讨论</span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Arial;mso-bidi-font-family:"Times New Roman";
color:black">DataExpress </span><span style="font-size:10.0pt;font-family:宋体;
mso-hansi-font-family:Arial;color:black">组件结构<span lang="EN-US">.<o:p>
</o:p>
</span></span></p>
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