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Get and Set Hatch Pattern Data Example (VB.NET)

This example shows how to get and set Hatch pattern data.

' Preconditions:
' 1.  Create a VB.NET Windows console project.
' 2.  Copy and paste this example into the VB.NET IDE.
' 3.  Add a reference to:
'     install_dir\APISDK\tlb\DraftSight.Interop.dsAutomation.dll.
' 4.  Add references to System and System.Windows.Forms.
' 5.  Make sure that C:\ProgramData\Dassault Systemes\DraftSight\Examples
'     exists.
' 6.  Copy all .dxf and .dwg files in this folder to a backup folder.
' 7.  Set all .dxf and .dwg files in
'     C:\ProgramData\Dassault Systemes\DraftSight\Examples
'     to read/write.
' 8.  Start DraftSight.
' 9.  Open the Immediate window.
' 10. Start debugging the project.
' Postconditions:
' 1. Each .dxf or .dwg file in
'    C:\ProgramData\Dassault Systemes\DraftSight\Examples is
'    filtered for Hatch patterns.
' 2. Hatch patterns are changed in the .dxf and .dwg files
'    that have them. Examine the Immediate window.
' 3. Copy all .dxf and .dwg files from the backup folder to
C:\ProgramData\Dassault Systemes\DraftSight\Examples.

Imports System.Collections.Generic
Imports System.Text
Imports System.Runtime.InteropServices
Imports System.Windows.Forms
Imports System.IO
Imports DraftSight.Interop.dsAutomation
Imports System.Diagnostics

Module Module1

Sub Main()

'Connect to DraftSight application
        Dim dsApp = GetObject(, "DraftSight.Application")
If dsApp Is Nothing Then
        End If

        dsApp.AbortRunningCommand() '
abort any command currently running in DraftSight to avoid nested commands

        'Check if the specified folder with drawings exists
        Dim folderName As String = "C:\ProgramData\Dassault Systemes\DraftSight\Examples"

        If False = Directory.Exists(folderName) Then
            Console.WriteLine("""" & folderName & """ does not exist.")
        End If

        'Get drawing files in the folder
        Dim drawings As List(Of String) = GetDrawings(folderName)
If 0 = drawings.Count Then
            MessageBox.Show("There are no DWG/DXF files in """ & folderName & """ directory.")
        End If

        'Iterate through all drawings
        For Each docName As String In drawings
'Open document
            Dim dsDoc As Document = dsApp.OpenDocument2(docName, dsDocumentOpenOption_e.dsDocumentOpen_Default, dsEncoding_e.dsEncoding_Default)
If dsDoc IsNot Nothing Then

                ' Print name of document
                Debug.Print("Name of document: " & dsDoc.GetPathName())

'Change Hatch pattern for all Hatch entities in the drawing

'Save document

'Close document
                dsApp.CloseDocument(docName, True)
                MessageBox.Show("""" & docName & """ document could not be opened.")
            End If
    End Sub

    Sub ChangeHatchPattern(ByVal dsDoc As Document)
'Get model space
        Dim dsModel As Model = dsDoc.GetModel()

'Get Sketch Manager
        Dim dsSketchMgr As SketchManager = dsModel.GetSketchManager()

'Get Selection Manager
        Dim dsSelectionMgr As SelectionManager = dsDoc.GetSelectionManager()

'Get selection filter
        Dim dsSelectionFilter As SelectionFilter = dsSelectionMgr.GetSelectionFilter()

'Clear selection filter

'Add Hatch entity to the selection filter

'Activate selection filter
        dsSelectionFilter.Active = True

        'Get all Layer names
        Dim layerNames As String() = GetLayers(dsDoc)

Dim entityTypes As Object
        Dim entityObjects As Object

        'Get Hatch entities
        dsSketchMgr.GetEntities(dsSelectionFilter, layerNames, entityTypes, entityObjects)

Dim dsEntities As Object() = DirectCast(entityObjects, Object())
If entityObjects Is Nothing Then
            Debug.Print("   Document does not have Hatch patterns.")
" ")
            Debug.Print("   Document has Hatch patterns.")

'Iterate through Hatch entities
            For Each entityItem As Object In dsEntities
'Cast to Hatch entity
                Dim dsHatch As Hatch = TryCast(entityItem, Hatch)

'Get Hatch pattern
                Dim patternName As String = ""
                Dim angle As Double = 0.0
Dim scale As Double = 0.0
Dim patternType As dsHatchPatternType_e = dsHatchPatternType_e.dsHatchPatternType_Predefined
Dim spacing As Double = 1.0
Dim dsHatchPattern As HatchPattern = dsHatch.GetHatchPattern()

                dsHatchPattern.GetHatchOrSolidData(patternName, angle, scale, patternType, spacing)
"   Pattern name, angle, scale, pattern types, spacing: " & patternName & ", " & angle & ", " & scale & ", " & patternType & ", " & spacing)

'Update Hatch pattern
                patternName = "HOUND"
                angle = 0.0
                scale = 1.0
                patternType = dsHatchPatternType_e.dsHatchPatternType_Predefined
                spacing = 1.0
                dsHatchPattern.SetHatchOrSolidData(patternName, angle, scale, patternType, spacing)
            Debug.Print(" ")
End If
    End Sub

    Function GetLayers(ByVal dsDoc As Document) As String()
'Get Layer Manager and Layer names
        Dim dsLayerManager As LayerManager = dsDoc.GetLayerManager()

Dim dsLayers As Object() = DirectCast(dsLayerManager.GetLayers(), Object())

Dim layerNames As String() = New String(dsLayers.Length - 1) {}

For index As Integer = 0 To dsLayers.Length - 1
Dim dsLayer As Layer = TryCast(dsLayers(index), Layer)
            layerNames(index) = dsLayer.Name

        Return layerNames
End Function

    Function GetDrawings(ByVal folderName As String) As List(Of String)
Dim drawings As New List(Of String)()
'Get DWG files
        Dim files As String() = Directory.GetFiles(folderName, "*.dwg")
If files IsNot Nothing Then
End If

        'Get DXF files
        files = Directory.GetFiles(folderName, "*.dxf")
If files IsNot Nothing Then
End If

        Return drawings
End Function


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