本文主要是介绍mapx+vb 实时读取数据库，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1，实现图元根据数据库中X,Y字段的数据变化而改变位置
2，自己要另起一个线程，更改数据库的x，y的值
Private Sub Form_Load()
'1创建图层
Dim lyr As Layer
Set lyr = Map1.Layers.CreateLayer("Car")
Set Map1.Layers.AnimationLayer = lyr '定义为动态图层
'2新建图元
Dim newobj As New MapXLib.Feature 'stand-alone object
Dim obj As MapXLib.Feature 'to hold feature added to layer
Dim NewStyle As New MapXLib.Style
Dim str As String
newobj.Attach Map1
With NewStyle
.SymbolType = miSymbolTypeBitmap
.SymbolBitmapSize = 24
.SymbolBitmapTransparent = True
.SymbolBitmapName = "CAR1-32.BMP"
End With
newobj.Style = NewStyle '设置图元样式
newobj.Type = miFeatureTypeSymbol '设置图元类型
Set obj = Map1.Layers(1).AddFeature(newobj)
obj.Update
End Sub
Private Sub Timer1_Timer()
timer1.Interval = 1000
Dim lyr As MapXLib.Layer
Set lyr = Map1.Layers("Car")
Dim ftr As New MapXLib.Feature
Dim ftrs As New MapXLib.Features
Set ftr = lyr.AllFeatures.Item(1)
' **********************连接数据库
Set conn = New ADODB.Connection
Set rs = New ADODB.Recordset
conn.ConnectionString = "Driver={sql server};server=127.0.0.1;uid=sa;pwd=password;database=databaseName"
conn.ConnectionTimeout = 10
conn.Open
rs.Open "select x,y from X_Y", conn, adOpenStatic, adLockReadOnly, adCmdText
' **********************连接数据库
ftr.Point.Set rs.Fields("x").Value, rs.Fields("y").Value '设置图元位置
ftr.Update
End Sub
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