全层显示代码
Private Sub combo1_Click()
Dim rect As MapXLib.Rectangle
If Combo1.Text <> "All Layers" Then
Set rect = Formmain.Map1.Layers(Combo1.Text).Bounds
xmaxvalue = str(rect.XMAX)
ymaxvalue = str(rect.YMAX)
xminvalue = str(rect.XMIN)
yminvalue = str(rect.YMIN)
End If
Set rect = Nothing
End Sub
Private Sub Command1_Click()
Dim lyr As MapXLib.Layer
On Error GoTo error1
Formmain.Map1.NumericCoordSys = Formmain.Map1.DisplayCoordSys
If Combo1.Text = "All Layers" Then
Set Formmain.Map1.Bounds = Formmain.Map1.Layers.Bounds
Else
Set lyr = Formmain.Map1.Layers(Combo1.Text)
Set Formmain.Map1.Bounds = lyr.Bounds
End If
Unload Me
error1:
Select Case Err.Number
Case 1074
MsgBox "在图层中没有发现对象", , "警告"
Unload Me
End Select
End Sub
Private Sub Command2_Click()
Unload Me
End Sub
Private Sub Form_Load()
Dim lyr As MapXLib.Layer
For Each lyr In Formmain.Map1.Layers
Combo1.AddItem lyr.Name
Next
Combo1.AddItem "All Layers"
Combo1.ListIndex = 0
End Sub
控件解释：
combo1???tab表的列表
command2??取消
command1??全层显示确定
在窗体上还有8个label控件，分别为：
xmaxvalue
ymaxvalue
xminvalue
yminvalue
xmax
ymax
xmin
ymin