使用Object DBX批量删除块(2021.12.21) By QQ:455383153

#if zcad
using ZwSoft.ZwCAD.Runtime;
using ZwSoft.ZwCAD.ApplicationServices;
using ZwSoft.ZwCAD.DatabaseServices;
using ZwSoft.ZwCAD.EditorInput;
using App = ZwSoft.ZwCAD.ApplicationServices.Application;
#else
using App= Autodesk.AutoCAD.ApplicationServices.Application;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Runtime;
#endif
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Windows.Forms;
namespace Testdeleteblock
{
    public class Class1
    {
        public static Document doc = App.DocumentManager.MdiActiveDocument;
        public static Database db = doc.Database;
        public static Editor ed = doc.Editor;
        [CommandMethod("TestEraseBlk")]
        public void TestEraseBlk()
        {
            var blkName = "Terminal1";
            try
            {
                var blkId = GetBlkId(db, blkName);
                if (blkId.IsNull)
                    throw new System.Exception(string.Format("\n Block not found: {0}", blkName));
                if (!EraseBlkRefs(blkId))
                    throw new System.Exception(string.Format("\n Failed to Erase BlockReferences for: {0}", blkName));
                if (!EraseBlk(blkId))
                    throw new System.Exception(string.Format("\n Failed to Erase Block: {0}", blkName));
                ed.WriteMessage("\n Block Erased: {0}", blkName);
            }
            catch (System.Exception ex)
            {
                ed.WriteMessage(ex.Message);
            }
        }
        [CommandMethod("EraseBlk")]
        public void GetTextCST()
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "dwg files (*.dwg)|*.dwg|All files (*.*)|*.*";
            openFileDialog.FilterIndex = 1;
            openFileDialog.RestoreDirectory = true;
            openFileDialog.Multiselect = true;
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                PromptStringOptions pStrOpts = new PromptStringOptions("\nEnter your name: ");
                pStrOpts.AllowSpaces = true;
                PromptResult pStrRes = ed.GetString(pStrOpts);
                if (pStrRes.Status != PromptStatus.OK) return;
                App.ShowAlertDialog("The name entered was: " + pStrRes.StringResult);
                string Blockname = pStrRes.StringResult;
                foreach (string text in openFileDialog.FileNames)
                {
                    try
                    {
                        EraseBlk(text, Blockname);
                    }
                    catch { }
                }
            }
        }
        public void EraseBlk(string Filename, string Blockname)
        {
            using (Database database = new Database(false, true))
            {
                var blkName = Blockname;
#if zcad
                database.ReadDwgFile(Filename, FileShare.ReadWrite, false, "");
#else
                database.ReadDwgFile(Filename, FileOpenMode.OpenForReadAndReadShare, false, "");
#endif
                database.CloseInput(true);
                using (Transaction transaction = database.TransactionManager.StartTransaction())
                {
                    ObjectId blkId = ObjectId.Null;
                    BlockTable bt = (BlockTable)transaction.GetObject(database.BlockTableId, OpenMode.ForRead);
                    if (bt.Has(blkName))
                        blkId = bt[blkName];
                    if (blkId.IsNull)
                        throw new System.Exception(string.Format("\n Block not found: {0}", blkName));
                    if (!EraseBlkRefs(blkId))
                        throw new System.Exception(string.Format("\n Failed to Erase BlockReferences for: {0}", blkName));
                    if (!EraseBlk(blkId))
                        throw new System.Exception(string.Format("\n Failed to Erase Block: {0}", blkName));
                    transaction.Commit();
                    database.SaveAs(Filename, DwgVersion.Current);
                }
            }
        }
        public static ObjectId GetBlkId(Database db, string blkName)
        {
            ObjectId blkId = ObjectId.Null;
            if (db == null)
                return ObjectId.Null;
            if (string.IsNullOrWhiteSpace(blkName))
                return ObjectId.Null;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
                if (bt.Has(blkName))
                    blkId = bt[blkName];
                tr.Commit();
            }
            return blkId;
        }
        public static bool EraseBlkRefs(ObjectId blkId)
        {
            bool blkRefsErased = false;
            if (blkId.IsNull) return false;
            Database db = blkId.Database;
            if (db == null) return false;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                BlockTableRecord blk = (BlockTableRecord)tr.GetObject(blkId, OpenMode.ForRead);
                var blkRefs = blk.GetBlockReferenceIds(true, true);
                if (blkRefs != null && blkRefs.Count > 0)
                {
                    foreach (ObjectId blkRefId in blkRefs)
                    {
                        BlockReference blkRef = (BlockReference)tr.GetObject(blkRefId, OpenMode.ForWrite);
                        blkRef.Erase();
                    }
                    blkRefsErased = true;
                }
                tr.Commit();
            }
            return blkRefsErased;
        }
        public static bool EraseBlk(ObjectId blkId)
        {
            bool blkIsErased = false;
            if (blkId.IsNull) return false;
            Database db = blkId.Database;
            if (db == null) return false;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                BlockTableRecord blk = (BlockTableRecord)tr.GetObject(blkId, OpenMode.ForRead);
                var blkRefs = blk.GetBlockReferenceIds(true, true);
                if (blkRefs == null || blkRefs.Count == 0)
                {
                    blk.UpgradeOpen();
                    blk.Erase();
                    blkIsErased = true;
                }
                tr.Commit();
            }
            return blkIsErased;
        }
    }
}

优化版：

        public void EraseBlk(string Filename, string Blockname)
        {
            using (Database database = new Database(false, true))
            {
                var blkName = Blockname;
                database.ReadDwgFile(Filename, FileOpenMode.OpenForReadAndReadShare, false, "");
                database.CloseInput(true);
                using (Transaction transaction = database.TransactionManager.StartTransaction())
                {
                    ObjectId blkId = ObjectId.Null;
                    BlockTable bt = (BlockTable)transaction.GetObject(database.BlockTableId, OpenMode.ForRead);
                    if (bt.Has(blkName))
                        blkId = bt[blkName];
                    if (blkId.IsNull)
                        throw new System.Exception(string.Format("\n Block not found: {0}", blkName));
                    //删除块参照
                    BlockTableRecord blk = (BlockTableRecord)transaction.GetObject(blkId, OpenMode.ForRead);
                    var blkRefs = blk.GetBlockReferenceIds(true, true);
                    if (blkRefs != null && blkRefs.Count > 0)
                    {
                        foreach (ObjectId blkRefId in blkRefs)
                        {
                            BlockReference blkRef = (BlockReference)transaction.GetObject(blkRefId, OpenMode.ForWrite);
                            blkRef.Erase();
                        }
                    }
                    //删除块表
                    if (blkRefs == null || blkRefs.Count == 0)
                    {
                        blk.UpgradeOpen();
                        blk.Erase();
                    }
                    transaction.Commit();
                    database.SaveAs(Filename, DwgVersion.Current);
                }
            }
        }