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<title>第十三章 数据库编程基础</title>
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<div class=B1 style='mso-margin-left-alt:480;mso-text-indent-alt:300'></div>
<div class=B2 style='mso-margin-left-alt:5496;mso-text-indent-alt:600'></div>
<div class=B3 style='mso-margin-left-alt:6024;mso-text-indent-alt:5880'></div>
<div class=B4 style='mso-margin-left-alt:6288;mso-text-indent-alt:6144'></div>
<div class=B style='text-align:justify;mso-line-spacing:"105 20 0";mso-margin-left-alt:
0;position:absolute;top:3.5%;left:9.36%;width:26.96%;height:5.25%'><nobr><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b> 2</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>、</b></span><span style='font-size:75%'><b> </b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>数据控件属性 </b></span></nobr></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0;
position:absolute;top:10.0%;left:9.36%;width:88.95%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>1.
Connect</b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>属性</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>——</b></span><span style='font-family:宋体;
mso-fareast-font-family:宋体;font-size:75%'><b>指定数据库类型 </b></span></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0'><span
style='position:absolute;top:16.75%;left:9.36%;width:100.93%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>VB</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>可识别的数据库有：</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>MDB</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>文件、</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>DBF</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>文件、</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>DB</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>文</b></span></span><span
style='position:absolute;top:22.25%;left:9.36%;width:88.95%;height:5.25%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>件、</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>DF</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>文件和</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>ODBC</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>数据库 </b></span></span></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0;
position:absolute;top:28.99%;left:9.36%;width:98.31%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>2.
DatabaseName</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>属性</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>——</b></span><span style='font-family:宋体;
mso-fareast-font-family:宋体;font-size:75%'><b>指定具体使用的数据库。 </b></span></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0;
position:absolute;top:35.75%;left:9.36%;width:88.95%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>3.
RecordType</b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>属性</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>——</b></span><span style='font-family:宋体;
mso-fareast-font-family:宋体;font-size:75%'><b>确定记录集合类型。 </b></span></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0;
position:absolute;top:42.25%;left:9.36%;width:96.62%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>4.
RecordSource</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>属性</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>——</b></span><span style='font-family:宋体;
mso-fareast-font-family:宋体;font-size:75%'><b>确定具体可访问的数据。</b></span><span
style='font-size:75%'><b> </b></span></div>
<div class=B style='mso-line-spacing:"105 20 0";mso-margin-left-alt:0'><span
style='position:absolute;top:49.0%;left:9.36%;width:103.18%;height:5.25%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>5.
EofAction</b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>和</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>BofAction</b></span><span style='font-family:
宋体;mso-fareast-font-family:宋体;font-size:75%'><b>属性决定数据控件要采取的操</b></span></span><span
style='position:absolute;top:55.0%;left:9.36%;width:88.95%;height:4.75%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>作。 </b></span></span></div>
<div class=B style='text-align:justify;mso-line-spacing:"105 20 0";mso-margin-left-alt:
0;position:absolute;top:61.25%;left:9.36%;width:85.01%;height:5.25%'><nobr><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>6.
RedaOnly</b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>属性用于控制能否对记录集进行写操作。 </b></span></nobr></div>
<div class=B style='text-align:justify;mso-line-spacing:"105 20 0";mso-margin-left-alt:
0;position:absolute;top:68.0%;left:9.36%;width:88.95%;height:10.75%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span></b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>要使关联控件能被数据库约束，必须对控件的两个属性进行设置： </b></span></div>
<div class=B style='text-align:justify;mso-line-spacing:"105 20 0";mso-margin-left-alt:
0;position:absolute;top:80.25%;left:9.36%;width:88.95%;height:10.75%'><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'>
</span>7.DataSource</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>属性通过指定一个有效的数据控件连接一个数据库。 </b></span></div>
<div class=B style='text-align:justify;mso-line-spacing:"105 20 0";mso-margin-left-alt:
0;position:absolute;top:92.5%;left:9.36%;width:67.04%;height:5.25%'><nobr><span
style='mso-special-format:nobullet;display:none'>•</span><span
style='font-size:75%'><b><span
style='mso-spacerun:yes'>
</span>8.DataField</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>属性设置数据库有效的字段。</b></span></nobr></div>
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