AutoCAD 动态块有两个快名 -

AutoCAD 动态块有两个快名

其中一个是匿名，过滤的时候就用的匿名

BlockReference.Name  匿名

EffectiveName

http://blog.csdn.net/hisinwang/article/details/78764581

http://adndevblog.typepad.com/autocad/2012/05/ide ... from-the-block-reference.html

AutoCAD .Net 获取块参照块名

<CommandMethod("GetBlockName")> _
Public Sub GetBlockName()
    Dim doc As Document = Application.DocumentManager.MdiActiveDocument
    Dim db As Database = doc.Database

    Dim options As New PromptEntityOptions(vbLf & "Select block reference")
    options.SetRejectMessage(vbLf & "Select only block reference")
    options.AddAllowedClass(GetType(BlockReference), False)
    Dim ret As PromptEntityResult = doc.Editor.GetEntity(options)
    If ret.Status <> PromptStatus.OK Then
        Return
    End If

    Using tr As Transaction = db.TransactionManager.StartTransaction()
        Dim blkRef As BlockReference = TryCast(tr.GetObject(ret.ObjectId, OpenMode.ForRead), BlockReference)
        Dim blkRecdId As ObjectId = ObjectId.Null
        If blkRef.IsDynamicBlock Then
            blkRecdId = blkRef.DynamicBlockTableRecord
        Else
            blkRecdId = blkRef.BlockTableRecord
        End If

        Dim block As BlockTableRecord = TryCast(tr.GetObject(blkRecdId, OpenMode.ForRead), BlockTableRecord)

        doc.Editor.WriteMessage(block.Name + vbLf)
    End Using
End Sub

程序代码：


Imports System.Collections.Generic
Imports Autodesk.AutoCAD.EditorInput
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Namespace EntitySelection
    Public Class Commands
        <CommandMethod("SDB")> _
        Public Shared Sub SelectDynamicBlocks()
            Dim doc As Object = Application.DocumentManager.MdiActiveDocument
            Dim ed As Object = doc.Editor
            Dim pso As New PromptStringOptions(vbLf & "Name of dynamic block to search for")
            pso.AllowSpaces = True
            Dim pr As Object = ed.GetString(pso)
            If pr.Status <> PromptStatus.OK Then
                Return
            End If
            Dim blkName As String = pr.StringResult
            Dim blkNames As New List(Of String)()
            blkNames.Add(blkName)
            Dim tr As Object = doc.TransactionManager.StartTransaction()
            Using tr
                Dim bt As BlockTable = CType(tr.GetObject(doc.Database.BlockTableId, OpenMode.ForRead),BlockTable)
                ' Start by getting access to our block, if it exists
                If Not bt.Has(blkName) Then
                    ed.WriteMessage(vbLf & "Cannot find block called ""{0}"".", blkName)
                    Return
                End If
                ' Get the anonymous block names
                Dim btr As BlockTableRecord = CType(tr.GetObject(bt(blkName), OpenMode.ForRead), BlockTableRecord)
                If Not btr.IsDynamicBlock Then
                    ed.WriteMessage(vbLf & "Cannot find a dynamic block called ""{0}"".", blkName)
                    Return
                End If
                ' Get the anonymous blocks and add them to our list
                Dim anonBlks As Object = btr.GetAnonymousBlockIds()
                For Each bid As ObjectId In anonBlks
                    Dim btr2 As BlockTableRecord = CType(tr.GetObject(bid, OpenMode.ForRead), BlockTableRecord)
                    blkNames.Add(btr2.Name)
                Next
                tr.Commit()
            End Using
            ' Build a conditional filter list so that only
            ' entities with the specified properties are
            ' selected
            Dim sf As New SelectionFilter(CreateFilterListForBlocks(blkNames))
            Dim psr As PromptSelectionResult = ed.SelectAll(sf)
            ed.WriteMessage(vbLf & "Found {0} entit{1}.", psr.Value.Count, (If(psr.Value.Count = 1, "y", "ies")))
        End Sub
        Private Shared Function CreateFilterListForBlocks(blkNames As List(Of String)) As TypedValue()
            ' If we don't have any block names, return null
            If blkNames.Count = 0 Then
                Return Nothing
            End If
            ' If we only have one, return an array of a single value
            If blkNames.Count = 1 Then
                Return New TypedValue() {New TypedValue(CType(DxfCode.BlockName, Integer), blkNames(0))}
            End If
            ' We have more than one block names to search for...
            ' Create a list big enough for our block names plus
            ' the containing "or" operators
            Dim tvl As New List(Of TypedValue)(blkNames.Count + 2)
            ' Add the initial operator
            tvl.Add(New TypedValue(CType(DxfCode.[Operator], Integer), "<or"))
            ' Add an entry for each block name, prefixing the
            ' anonymous block names with a reverse apostrophe
            For Each blkName As Object In blkNames
                tvl.Add(New TypedValue(CType(DxfCode.BlockName, Integer), (If(blkName.StartsWith("*"), "`" + blkName, blkName))))
            Next
            ' Add the final operator
            tvl.Add(New TypedValue(CType(DxfCode.[Operator], Integer), "or>"))
            ' Return an array from the list
            Return tvl.ToArray()
        End Function
    End Class
End Namespace