Make a Linetype Current Through the Database (.NET)

This example sets a linetype current through the Database object with the Celtype property.

VB.NET

Imports Autodesk.AutoCAD.Runtime
Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
 
<CommandMethod("SetLinetypeCurrent")> _
Public Sub SetLinetypeCurrent()
    '' Get the current document and database
    Dim acDoc As Document = Application.DocumentManager.MdiActiveDocument
    Dim acCurDb As Database = acDoc.Database

    '' Start a transaction
    Using acTrans As Transaction = acCurDb.TransactionManager.StartTransaction()

        '' Open the Linetype table for read
        Dim acLineTypTbl As LinetypeTable
        acLineTypTbl = acTrans.GetObject(acCurDb.LinetypeTableId, _
                                         OpenMode.ForRead)

        Dim sLineTypName As String = "Center"

        If acLineTypTbl.Has(sLineTypName) = True Then
            '' Set the linetype Center current
            acCurDb.Celtype = acLineTypTbl(sLineTypName)

            '' Save the changes
            acTrans.Commit()
        End If

        '' Dispose of the transaction
    End Using
End Sub

C#

using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
 
[CommandMethod("SetLinetypeCurrent")]
public static void SetLinetypeCurrent()
{
    // Get the current document and database
    Document acDoc = Application.DocumentManager.MdiActiveDocument;
    Database acCurDb = acDoc.Database;

    // Start a transaction
    using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
    {
        // Open the Linetype table for read
        LinetypeTable acLineTypTbl;
        acLineTypTbl = acTrans.GetObject(acCurDb.LinetypeTableId,
                                            OpenMode.ForRead) as LinetypeTable;

        string sLineTypName = "Center";

        if (acLineTypTbl.Has(sLineTypName) == true)
        {
            // Set the linetype Center current
            acCurDb.Celtype = acLineTypTbl[sLineTypName];

            // Save the changes
            acTrans.Commit();
        }

        // Dispose of the transaction
    }
}

VBA/ActiveX Code Reference

ThisDrawing.ActiveLinetype = ThisDrawing.Linetypes.Item("Center")