Convert Image to DFX file using C# and VB.Net in ASP.Net

Hi majidp.star,

First install the netDxf.netstandard from nugetr using the below command.

Install-Package netDxf.netstandard -Version 2.4.0

Then use the below code to convert image to dxf file.

Namespaces

C#

using netDxf;
using netDxf.Objects;
using netDxf.Units;

VB.Net

Imports netDxf
Imports netDxf.Objects
Imports netDxf.Units

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    ImageDefinition imageDef = new ImageDefinition(Server.MapPath("~/Jellyfish.jpg"));
    imageDef.ResolutionUnits = ImageResolutionUnits.Centimeters;
    double width = imageDef.Width / imageDef.HorizontalResolution;
    double height = imageDef.Height / imageDef.VerticalResolution;
    netDxf.Entities.Image image = new netDxf.Entities.Image(imageDef, new Vector2(0, 0), width, height);
    image.Rotation = 30;

    double x = width / 4;
    double y = height / 4;
    ClippingBoundary clip = new ClippingBoundary(x, y, 2 * x, 2 * y);
    image.ClippingBoundary = clip;

    DxfDocument doc = new DxfDocument();
    doc.AddEntity(image);
    doc.Save(Server.MapPath("~/Jellyfish.dxf"));

    DxfDocument test = DxfDocument.Load(Server.MapPath("~/Jellyfish.dxf"));
    test.Save(Server.MapPath("~/Jellyfish1.dxf"));
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim imageDef As ImageDefinition = New ImageDefinition(Server.MapPath("~/Jellyfish.jpg"))
    imageDef.ResolutionUnits = ImageResolutionUnits.Centimeters
    Dim width As Double = imageDef.Width / imageDef.HorizontalResolution
    Dim height As Double = imageDef.Height / imageDef.VerticalResolution
    Dim image As netDxf.Entities.Image = New netDxf.Entities.Image(imageDef, New Vector2(0, 0), width, height)
    image.Rotation = 30
    Dim x As Double = width / 4
    Dim y As Double = height / 4
    Dim clip As ClippingBoundary = New ClippingBoundary(x, y, 2 * x, 2 * y)
    image.ClippingBoundary = clip
    Dim doc As DxfDocument = New DxfDocument()
    doc.AddEntity(image)
    doc.Save(Server.MapPath("~/Jellyfish.dxf"))
    Dim test As DxfDocument = DxfDocument.Load(Server.MapPath("~/Jellyfish.dxf"))
    test.Save(Server.MapPath("~/Jellyfish1.dxf"))
End Sub

Reference: 

https://csharp.hotexamples.com/examples/netDxf.Entities/Image/-/php-image-class-examples.html