[求助]9958，vb+mo中如何显示两图层的公共符合要求部分

<P>其中加载图层的部分省略了</P>
<P>Option Explicit<BR>Dim resultShape1 As MapObjects2.Polygon     '一下是声明一些变量<BR>Dim resultShape2 As MapObjects2.Polygon<BR>Dim resultShape As MapObjects2.Polygon</P>
<P><BR>Dim recSelection As MapObjects2.Recordset<BR>Dim recSelection1 As MapObjects2.Recordset</P>
<P>Dim intersectShape As MapObjects2.Polygon<BR>Dim intersectShape1 As MapObjects2.Polygon<BR>Dim rect As MapObjects2.Rectangle</P>



<P>Private Sub Map1_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)</P>
<P>  Dim strExpression As String<BR>  Dim strExpression1 As String<BR>  'Dim Ai As Single<BR>  'Const Ak = 1000<BR>   <BR>  Set rect = Map1.TrackRectangle<BR>  strExpression = "适宜性='无公害'"<BR>  strExpression1 = "状况='一般'"<BR>  <BR>  Set recSelection = Map1.Layers("wly_Project").SearchExpression(strExpression)<BR>  Set intersectShape = recSelection.Fields("shape").Value<BR>  <BR>  <BR>  <BR>  Set recSelection1 = Map1.Layers("耕地地力_Project").SearchExpression(strExpression1)<BR>  Set intersectShape1 = recSelection.Fields("shape").Value<BR>  <BR>  <BR>  '求得两图层符合条件的公共部分               主要就是这一句，希望能得到就结果<BR>  Set resultShape = intersectShape.Intersect(intersectShape1)</P>
<P>  Map1.Refresh<BR><BR></P>
<P> If Not recSelection Is Nothing Then         '先将图层符合条件的部分分别以不同的色显示<BR>    sym1.Color = moOrange<BR>    Map1.DrawShape recSelection, sym1<BR>  End If</P>
<P><BR>  <BR>  If Not recSelection1 Is Nothing Then<BR>    sym1.Color = moGreen<BR>    <BR>    Map1.DrawShape recSelection, sym1<BR>  End If</P>

<P>  If Not resultShape Is Nothing Then        '以红色显示两图层符合条件的公共部分<BR>    sym1.Color = moRed<BR>    Map1.DrawShape resultShape, sym1<BR>  End If</P>
<P>End Sub</P>

我也需要这方面的东西，真是好着急啊，上面的朋友可解决出来了啊。

<P>我都查了啊，怎么还是不行的呢，我找不出原因啊。。。。。</P>
<P>哪位高手帮帮忙啊，。。。</P>
<img src="images/post/smile/dvbbs/em02.gif" />

代码思路看上去应该没什么问题；只能自己逐步查看是否都得到想要的结果了，查看问题到底在哪里<br><br>建议： Set recSelection = Map1.Layers("wly_Project").SearchExpression(strExpression)<br>像这种最好是分开两句写，<br>MapObjects2.MapLayer ml = map1.layers(0);<br>recSelecction = ml.sertchExpression("");<br><br>还有你的图层是否符合你的要求，多查查吧<br>