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发表于 2006-9-2 20:39:00
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显示全部楼层
Dim cn As ADODB.Connection
'创建ADO连接并打开
Sub CreateConnection()
Dim ConStr As String '连接字符串
Set cn = New ADODB.Connection
cn.CursorLocation = adUseClient
cn.Provider = "Microsoft.Jet.OLEDB.4.0;"
ConStr = "Data Source=你的数据库文件;"
cn.Open ConStr
End Sub
' 从数据库中读取数据
Public Sub ReadFromDB()
' 创建数据库连接
Call CreateConnection
' 在line表中查询所有的记录
Set rst = New ADODB.Recordset
rst.CursorLocation = adUseClient
rst.Open "SELECT DISTINCT * FROM line", cn, adOpenForwardOnly, _
adLockBatchOptimistic, adCmdText
rst.MoveFirst
Dim i As Integer
Dim pt1(0 To 2) As Double, pt2(0 To 2) As Double
' 使用查询得到的数据创建直线
For i = 0 To rst.RecordCount - 1
pt1(0) = rst.Fields("x1")
pt1(1) = rst.Fields("y1")
pt1(2) = 0
pt2(0) = rst.Fields("x2")
pt2(1) = rst.Fields("y2")
pt2(2) = 0
ThisDrawing.ModelSpace.AddLine pt1, pt2
rst.MoveNext
Next i
'rst.Close ' 关闭记录集，准备下一次使用
' 在line表中查询
Set rst = New ADODB.Recordset
rst.CursorLocation = adUseClient
rst.Open "SELECT x1,y1 FROM line", cn, adOpenForwardOnly, _
adLockBatchOptimistic, adCmdText
rst.MoveFirst
' 使用表中的数据绘制圆
For i = 0 To rst.RecordCount - 1
pt1(0) = rst.Fields("x1")
pt1(1) = rst.Fields("y1")
pt1(2) = 0
ThisDrawing.ModelSpace.Addpoint
rst.MoveNext
Next i
'rst.Close
ThisDrawing.Application.Update
End Sub
这个代码应该符合你的要求 |
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