vb .net to launch Civil 3D without starting file-CodePudding

I am creating a VB .NET application that will launch Civil 3D with different profiles. I am having issue launching the application w/ parameters without a startup file.

    Dim desProf As String
    desProf = "<< C3D_Imperial >>"
    Dim p As New ProcessStartInfo

    p.FileName = "C:\Program Files\Autodesk\AutoCAD 2022\acad.exe"
    p.Arguments = " /ld C:\Program Files\Autodesk\AutoCAD 2022\AecBase.dbx "
    p.Arguments = "/p " & desProf & " /product C3D /language en-US"
    p.UseShellExecute = True
    p.WindowStyle = ProcessWindowStyle.Normal
    Process.Start(p)

The code results in an AutoCAD Message stating: "Cannot file the specified drawing file. Please verify that the file exists."

If I just use: Process.Start("C:\Program Files\Autodesk\AutoCAD 2022\acad.exe") I can get AutoCAD to start w/o prompting the drawing file is missing.

Thanks for any help you can provide.

CodePudding user response：

You’re overwriting your first set of arguments with the second. Try

p.Arguments = p.Arguments & "/p " & desProf & " /product C3D /language en-US"

Also, are you sure you need the << and >> characters?

CodePudding user response：

@SteveTodd, you are correct. I fought with it for an hour and got it working. Here is the final code:

p.FileName = "C:\Program Files\Autodesk\AutoCAD 2022\acad.exe"
p.Arguments = " /ld ""C:\Program Files\Autodesk\AutoCAD 2022\AecBase.dbx"" /p 
  " & desProf & " /product C3D /language en-US"
p.UseShellExecute = True
Process.Start(p)