📄 第3章 界面设计.htm
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lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">3.2简单界面控件<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><SPAN
lang=EN-US style="FONT-FAMILY: 宋体">ListBox、</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">ComboBox、ListBox、CheckedListBox、ListBox与CheckedListBox、PictureBox、Timer<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt; mso-pagination: widow-orphan"
align=left><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">（<SPAN
lang=EN-US>2 学时）<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt; mso-layout-grid-align: none"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">【教学目的】</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 39pt; TEXT-INDENT: -21pt; LINE-HEIGHT: 20pt; tab-stops: list 39.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo2"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Wingdings; mso-bidi-font-size: 12.0pt">Ø<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">典型列表类界面的应用特征与方法。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 39pt; TEXT-INDENT: -21pt; LINE-HEIGHT: 20pt; tab-stops: list 39.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo2"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Wingdings; mso-bidi-font-size: 12.0pt">Ø<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">列表类控件与定时控件的程序设计方法。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 39pt; TEXT-INDENT: -21pt; LINE-HEIGHT: 20pt; tab-stops: list 39.0pt; mso-line-height-rule: exactly; mso-list: l0 level1 lfo2"><![if !supportLists]><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Wingdings; mso-bidi-font-size: 12.0pt">Ø<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">图片的应用方法。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt; mso-layout-grid-align: none"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">【教学重点】</SPAN><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt">
<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 18pt; TEXT-ALIGN: left; mso-layout-grid-align: none"
align=left><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">界面控件的一般特性，典型控件的属性、事件与方法的应用意义与特征，应用方法。</SPAN><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; TEXT-ALIGN: left; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt; mso-layout-grid-align: none"
align=left><SPAN
style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">【教学难点】<o:p></o:p></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 39pt; TEXT-INDENT: -21pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; tab-stops: list 39.0pt; mso-list: l1 level1 lfo4"
align=left><![if !supportLists]><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: Wingdings; mso-bidi-font-size: 12.0pt">Ø<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">控件属性的应用方法、典型属性枚举理解与应用。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN-LEFT: 39pt; TEXT-INDENT: -21pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; tab-stops: list 39.0pt; mso-list: l1 level1 lfo4"
align=left><![if !supportLists]><SPAN lang=EN-US
style="FONT-FAMILY: Wingdings">Ø<SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></SPAN><![endif]><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">事件与方法的应用意义与方法。</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt"><SPAN
lang=EN-US style="FONT-FAMILY: 方正舒体; mso-hansi-font-family: 宋体"><![if !supportEmptyParas]><![endif]> <o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18.05pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><B><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">3.2简单界面控件<o:p></o:p></SPAN></B></P>
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style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">五、<SPAN
lang=EN-US>ComboBox控件(下拉列表框)<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">下拉组合框<SPAN
lang=EN-US>ComboBox控件用于在一个下拉列表中显示或选择数据。外观特征如图。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">顶部：是一个允许用户键入列表项的文本框。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">列表框部分：它显示可供用户选择项的列表。<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">⒈<SPAN
lang=EN-US>ComboBox控件的常用属性<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">⑴<SPAN
lang=EN-US>DropDownStyle 属性（通过演示进行操作）<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">①<SPAN
lang=EN-US>Simple：允许简单的下拉列表框；<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">②<SPAN
lang=EN-US>DropDownList：下拉列表框，文本部分不可编辑，并且必须鼠标单击“箭头”才能查看下拉列表。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">③<SPAN
lang=EN-US>DropDown：下拉列表框，文本部分可编辑，并且用户必须鼠标单击“箭头”才能查看下拉列表。<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">⑵<SPAN
lang=EN-US>Items 属性<o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">表示<SPAN
lang=EN-US>ComboBox
中所包含项的集合。可获得ComboBox列表的所有项目或访问集合中的某一指定项。也可以向列表中添加新项、移除项和获得集合中项的数目。Items项的引用是通过项索引号进行的，</SPAN></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">索引号从<SPAN
lang=EN-US>0开始。</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">例如：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">ComboBox1.Items.Item(1)表示ComboBox1中的第二个元素。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">⑶</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">SelectedItem</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">属性<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">获取</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">ComboBox控件</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">当前选定的项值，例如：</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">ComboBox1.SelectedItem。</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">⑷</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">SelectedIndex</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">属性<SPAN
lang=EN-US><o:p></o:p></SPAN></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">获取或设置</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-font-kerning: 0pt">ComboBox控件</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt">当前选定的项的索引号，例如，</SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">获取当前选定项的索引号程序代码：</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt"><o:p></o:p></SPAN></P>
<P class=MsoBodyText
style="TEXT-INDENT: 18pt; mso-char-indent-count: 2.0; mso-char-indent-size: 9pt"><SPAN
lang=EN-US style="FONT-SIZE: 9pt; mso-hansi-font-family: 宋体">Dim Index_N As
integer = ComboBox1.SelectedIndex </SPAN><SPAN lang=EN-US
style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt; mso-hansi-font-family: 宋体"><o:p></o:p></SPAN></P>
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