solidworks二次开发-04-修改数据
上次已经可以访问特征的各参数了，今天我们来修改它：
要修改前面的步骤不能少，当我们已经可以读取一些特征时，我们就可以给他设定一些值。当然有时需要调用特定的参数。solidworks是ole和com的，所以要习惯这样。
在修改完特征后需要调用函数modifydefinition()来实现变化。
我们给一个例子，这个例子比前面的都要全面，它有很好的容错引导机制，可以直接拿来成为一个稳定的宏程序。
This example doubles the length of the base extrude.这个例子将拉伸凸台的长度增加一倍
Dim swApp As SldWorks.SldWorks
Dim Model As ModelDoc2
Dim Component As Component2
Dim CurFeature As feature
Dim isGood As Boolean
' Will become an ExtrudeFeatureData Object
Dim FeatData As Object
Dim Depth As Double
Dim SelMgr As SelectionMgr
Sub doubleBE()
Set swApp = CreateObject("sldWorks.application")
Set Model = swApp.ActiveDoc
' Make sure that the active document is a part
If Model.GetType <> swDocPART And Model.GetType <> swDocASSEMBLY Then
‘这里的swDocPART 、swDocASSEMBLY 我的环境没有通过。我使用 msgbox Model.GetType 的笨办法得到整数为1和2
Msg = "Only Allowed on Parts or Assemblies" ' Define message
Style = vbOKOnly ' OK Button only
Title = "Error" ' Define title
Call MsgBox(Msg, Style, Title) ' Display error message
Exit Sub ' Exit this program
End If
' Get the Selection Manager
Set SelMgr = Model.SelectionManager
' Get the selected object (first in the group if there are more than one)
' Note that at this point CurFeature is just a Feature Object
Set CurFeature = SelMgr.GetSelectedObject3(1)
If CurFeature Is Nothing Then
' Tell the user that nothing is selected
swApp.SendMsgToUser2 "Please select the Base-Extrude", swMbWarning, swMbOk
Exit Sub
End If
' Check the feature's type name
' Make sure it is an extrusion
If Not CurFeature.GetTypeName = swTnExtrusion Then
’在这里使用swTnExtrusion我的环境没有通过，我改成了Extrusion才ok
swApp.SendMsgToUser2 "Please select the Base-Extrude", swMbWarning, swMbOk
Exit Sub
End If
' Get the Extrusion's Feature Data
Set FeatData = CurFeature.GetDefinition
' Get the access selections for the feature data
' Note that Component is NULL when accessing the selections of a standalone part. If we were calling AccessSelections from within an assembly, then model would refer to the top-level document in the assembly and component would refer to the actual part.
isGood = FeatData. AccessSelections (Model, Component)
' Inform the user of an error
If Not isGood Then
swApp.SendMsgToUser2 "Unable to obtain access selections", swMbWarning, swMbOk
Exit Sub
End If
' Make sure the user has selected the base extrude
If Not FeatData.IsBaseExtrude Then
swApp.SendMsgToUser2 "Please select the Base-Extrude", swMbWarning, swMbOk
FeatData. ReleaseSelectionAccess
Exit Sub
End If
' Change the depth of this extrusion to double its previous depth
Depth = FeatData.GetDepth(True)
FeatData.SetDepth True, Depth * 2
' Implement the changes to the feature
isGood = CurFeature. ModifyDefinition (FeatData, Model, Component)
' If the modify definition failed
If Not isGood Then
swApp.SendMsgToUser2 "Unable to modify feature data", swMbWarning, swMbOk
' Release the AccessSelections
FeatData. ReleaseSelectionAccess
End If
End Sub
如果出现特征出现“退回”状态，我现在还没有找到问题的原因，只能在代码执行到最后调用
Model.Save
Model.Rebuild
这两个函数来自动更新。