autocad.net QQ群:193522571 cad.net添加和删除图层过滤器

cad.net添加和删除图层过滤器 using Autodesk.AutoCAD.ApplicationServices;

using Autodesk.AutoCAD.DatabaseServices;

using Autodesk.AutoCAD.EditorInput;

using Autodesk.AutoCAD.Runtime;

using Autodesk.AutoCAD.LayerManager;




namespace LayerFilters

{

  public class Commands

  {

    [CommandMethod("LLFS")]

    static public void ListLayerFilters()

    {

      Document doc =

        Application.DocumentManager.MdiActiveDocument;

      Database db = doc.Database;

      Editor ed = doc.Editor;




      // List the nested layer filters




      LayerFilterCollection lfc =

        db.LayerFilters.Root.NestedFilters;




      for (int i = 0; i < lfc.Count; ++i)

      {

        LayerFilter lf = lfc[i];

        ed.WriteMessage(

          "
{0} - {1} (can{2} be deleted)",

          i + 1,

          lf.Name,

          (lf.AllowDelete ? "" : "not")

        );

      }

    }




    [CommandMethod("CLFS")]

    static public void CreateLayerFilters()

    {

      Document doc =

        Application.DocumentManager.MdiActiveDocument;

      Database db = doc.Database;

      Editor ed = doc.Editor;




      try

      {

        // Get the existing layer filters

        // (we will add to them and set them back)




        LayerFilterTree lft =

          db.LayerFilters;

        LayerFilterCollection lfc =

          lft.Root.NestedFilters;




        // Create three new layer filters




        LayerFilter lf1 = new LayerFilter();

        lf1.Name = "Unlocked Layers";

        lf1.FilterExpression = "LOCKED=="False"";




        LayerFilter lf2 = new LayerFilter();

        lf2.Name = "White Layers";

        lf2.FilterExpression = "COLOR=="7"";




        LayerFilter lf3 = new LayerFilter();

        lf3.Name = "Visible Layers";

        lf3.FilterExpression =

          "OFF=="False" AND FROZEN=="False"";




        // Add them to the collection




        lfc.Add(lf1);

        lfc.Add(lf2);

        lfc.Add(lf3);




        // Set them back on the Database




        db.LayerFilters = lft;




        // List the layer filters, to see the new ones




        ListLayerFilters();

      }

      catch (Exception ex)

      {

        ed.WriteMessage(

          "
Exception: {0}",

          ex.Message

        );

      }

    }




    [CommandMethod("DLF")]

    static public void DeleteLayerFilter()

    {

      Document doc =

        Application.DocumentManager.MdiActiveDocument;

      Database db = doc.Database;

      Editor ed = doc.Editor;




      ListLayerFilters();




      try

      {

        // Get the existing layer filters

        // (we will add to them and set them back)




        LayerFilterTree lft =

          db.LayerFilters;

        LayerFilterCollection lfc =

          lft.Root.NestedFilters;




        // Prompt for the index of the filter to delete




        PromptIntegerOptions pio =

          new PromptIntegerOptions(

          "

Enter index of filter to delete"

          );

        pio.LowerLimit = 1;

        pio.UpperLimit = lfc.Count;




        PromptIntegerResult pir =

          ed.GetInteger(pio);




        // Get the selected filter




        LayerFilter lf = lfc[pir.Value - 1];




        // If it's possible to delete it, do so




        if (!lf.AllowDelete)

        {

          ed.WriteMessage(

            "
Layer filter cannot be deleted."

          );

        }

        else

        {

          lfc.Remove(lf);

          db.LayerFilters = lft;




          ListLayerFilters();

        }

      }

      catch(Exception ex)

      {

        ed.WriteMessage(

          "
Exception: {0}",

          ex.Message

        );

      }

    }

  }

}