📄 mapobject学习笔记－第二讲 图层的基本功能开发_魏国强 的 博客.htm
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<DIV class=modbox id=m_blog>
<DIV class=tit>MapObject学习笔记－第二讲 图层的基本功能开发</DIV>
<DIV class=date>2008-01-07 22:38</DIV>
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<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 130%; TEXT-ALIGN: center; mso-pagination: widow-orphan"
align=center></P><STRONG style="mso-bidi-font-weight: normal"><SPAN
style="FONT-SIZE: 15pt; LINE-HEIGHT: 130%; mso-ascii-: 12.0pt; mso-bidi-: 0pt">
<P>(转自<A class=HeaderMainTitle
href="http://www.cnblogs.com/gispeng/"><FONT
size=4>GIS雲中飛鹏</FONT></A>)</P>
<P></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan"
align=left></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt"><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt; mso-bidi-font-size: 12.0pt">1</SPAN><STRONG><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 12.0pt; mso-bidi-: 0pt">、利用其他控件动态加载图层文件</SPAN></STRONG></SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">所用控件包括</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map
</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">控件，</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Drive</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">、</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dir</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">、</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">File</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">列表控件，和一个命令按钮，实现可选择性的图层文件加载，基本代码如下：</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Option
Explicit</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dim dc As New
DataConnection</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dim layer As
New MapLayer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Private Sub
Command1_Click()</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; COLOR: red; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Layers.Clear</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">dc.Database =
File1.Path</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">If dc.Connect
Then</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">layer.GeoDataset
= dc.FindGeoDataset(File1.FileName)</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Layers.Add
layer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Refresh</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Else</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">MsgBox
"</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">在指定文件夹下面没有找到相应图层数据文件！</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">"</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
If</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
Sub</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Private Sub
Drive1_Change()</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dir1.Path =
Drive1.Drive</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
Sub</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Private Sub
Dir1_Change()</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">File1.Path =
Dir1.Path</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 40pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 4.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
Sub</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan"
align=left><STRONG><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt; mso-bidi-font-size: 12.0pt">2</SPAN></STRONG><STRONG><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 12.0pt; mso-bidi-: 0pt">、同一文件夹下加载</SPAN></STRONG></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">如果你的程序和</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">GIS</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">图层文件（</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">.shp</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">、</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">.shx</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">和</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">.dbf</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">）在同一个文件夹下，设置好图层文件夹的路径，进行自动加载。示例如下：</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Option
Explicit</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dim dc As New
DataConnection</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; COLOR: red; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dim
layer As MapLayer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Private Sub
Command1_Click()</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">dc.Database =
App.Path</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">dc.Database =
"</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">指定文件夹路径</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">"</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">If dc.Connect
Then</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; COLOR: red; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Set
layer = New MapLayer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">layer.GeoDataset
= dc.FindGeoDataset(</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">文件名</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">1)</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Layers.Add
layer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; COLOR: red; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Set
layer = New MapLayer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">layer.GeoDataset
= dc.FindGeoDataset(</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">文件名</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">2)</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Layers.Add
layer</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Map1.Refresh</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Else</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">MsgBox
"</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">在指定文件夹下面没有找到相应图层数据文件！</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">"</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
If</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">End
Sub</SPAN></P>
<P class=MsoNormal
style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20pt; LINE-HEIGHT: 130%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 2.0"
align=left><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">试验在调试过程中替换代码“</SPAN><SPAN
style="FONT-SIZE: 10pt; COLOR: red; LINE-HEIGHT: 130%; mso-bidi-: 0pt">Dim
layer As New MapLayer</SPAN><SPAN
style="FONT-SIZE: 10pt; LINE-HEIGHT: 130%; mso-ascii-: 0pt">”，观察程序运行结果。</SPAN></P><SPAN
style="FONT-SIZE: 12pt; LINE-HEIGHT: 130%; mso-bidi-: 0pt">
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT
size=2><STRONG><SPAN>3</SPAN></STRONG><STRONG><SPAN>、在不同文件夹下加载</SPAN></STRONG></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN><FONT
size=2>由于在实际的应用程序中，图层文件和程序文件都很多，为了方便管理，一般程序文件和图层文件不在一个文件夹下，通常采用一个文件夹单独存放图层文件，而把各个程序文件和它并列放置。</FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><FONT
size=2><SPAN>例如应用程序的文件夹路径为“</SPAN><SPAN>F:\MO</SPAN><SPAN>实验”，程序在“</SPAN><SPAN>F:\MO</SPAN><SPAN>实验</SPAN><SPAN>\</SPAN><SPAN>程序加载”下，图层文件放在“</SPAN><SPAN>F:\MO</SPAN><SPAN>实验</SPAN><SPAN>\WORLD</SPAN><SPAN>”文件夹下，这时要用</SPAN><SPAN>+”\..\”</SPAN><SPAN>返回上级文件夹，示例代码为：</SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0"><SPAN><FONT
size=2>Option Explicit</FONT></SPAN></P>
<P class=MsoNormal
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