form01.frm

VB＋MO的GIS开发代码

VERSION 5.00
Object = "{9BD6A640-CE75-11D1-AF04-204C4F4F5020}#2.0#0"; "Mo20.ocx"
Begin VB.Form Form01 
   Caption         =   "标注偏移"
   ClientHeight    =   7215
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   10035
   LinkTopic       =   "Form1"
   ScaleHeight     =   7215
   ScaleWidth      =   10035
   StartUpPosition =   2  'CenterScreen
   Begin VB.CommandButton Command2 
      Caption         =   "有偏移"
      Height          =   495
      Left            =   5760
      TabIndex        =   2
      Top             =   6600
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "没有偏移"
      Height          =   495
      Left            =   2880
      TabIndex        =   1
      Top             =   6600
      Width           =   1215
   End
   Begin MapObjects2.Map Map1 
      Height          =   6495
      Left            =   0
      TabIndex        =   0
      Top             =   0
      Width           =   9975
      _Version        =   131072
      _ExtentX        =   17595
      _ExtentY        =   11456
      _StockProps     =   225
      BackColor       =   16777215
      BorderStyle     =   1
      Contents        =   "Form01.frx":0000
   End
End
Attribute VB_Name = "Form01"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'Xue Wei,2003/5/2
'属性的标注和标注字体的设置

Option Explicit
Dim Dbl As Boolean

Private Sub Command1_Click()
  Dbl = False
  Map1.Layers.Clear
  DrawLayer
End Sub

Private Sub Command2_Click()
  Dbl = True
  Map1.Layers.Clear
  DrawLayer
End Sub

Private Sub DrawLayer()
  Dim dc As New DataConnection
  Dim layer As MapLayer
   
  dc.Database = App.Path + "\..\" + "Mexico"
  If Not dc.Connect Then
    MsgBox "在指定的文件夹下没找到图层数据文件！"
    End
  End If
    
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("States")
  layer.Symbol.Color = moOrange
  layer.Symbol.Size = 1
  layer.Symbol.Style = 2
  layer.Symbol.OutlineColor = moBrown
  Map1.Layers.Add layer
   
  Set layer = New MapLayer
  Set layer.GeoDataset = dc.FindGeoDataset("Cities")
  layer.Symbol.Color = moRed
  layer.Symbol.Size = 3
  layer.Symbol.Style = 0
  Set layer.Renderer = New LabelRenderer
  With layer.Renderer
    If Dbl Then
      .XOffsetField = "CITIES_"
    End If
    .Field = "NAME"
    .Symbol(0).Color = moBlack
    .Symbol(0).Font.Size = 8
  End With
  Map1.Layers.Add layer
  Map1.Refresh
End Sub

Private Sub Form_Load()
  Dbl = False
  DrawLayer
End Sub