form04.frm

一个关于基于MO编程的参考资料希望对大家的交流和学习有帮助

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "mo20.ocx"
Begin VB.Form Form04 
   ClientHeight    =   5550
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6495
   LinkTopic       =   "Form1"
   ScaleHeight     =   5550
   ScaleWidth      =   6495
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   495
      Left            =   2640
      TabIndex        =   1
      Top             =   4800
      Width           =   1215
   End
   Begin MapObjects2.Map Map1 
      Height          =   4335
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   6255
      _Version        =   131072
      _ExtentX        =   11033
      _ExtentY        =   7646
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form04.frx":0000
   End
End
Attribute VB_Name = "Form04"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xuewei,2003/6/23
'产生DXF图层基本示例；

Option Explicit
Dim dc As MapObjects2.DataConnection

Private Sub Command1_Click()
  Dim lyr As New MapObjects2.MapLayer
  
  dc.Database = "[CADLine]..\chapter1102"
  'dc.Database = "[CADArea]..\chapter1102"
  'dc.Database = "[CADPoint]..\chapter1102"
  Set lyr.GeoDataset = dc.FindGeoDataset("aa2.dxf")
  
  If lyr.Valid Then
    lyr.Symbol.Color = moRed
    lyr.Symbol.Size = 3
    Map1.Layers.Add lyr
  Else
    MsgBox "文件不存在"
    Exit Sub
  End If
End Sub

Private Sub Map1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
  If Button = 1 Then
    Map1.Extent = Map1.TrackRectangle
  Else
    Map1.Pan
  End If
End Sub

Private Sub Form_Load()
  DrawLayer       '加载世界地图的Country图层；
  Command1.Caption = "显示DXF文件"
End Sub

Private Sub DrawLayer()
  Dim Layer As MapLayer
  Set dc = New MapObjects2.DataConnection
  dc.Database = App.Path + "\..\" + "world"
  Set Layer = New MapLayer
  Set Layer.GeoDataset = dc.FindGeoDataset("Country")
  Layer.Symbol.Color = moYellow
  Layer.Symbol.OutlineColor = moBrown
  Map1.Layers.Add Layer
End Sub