C# AutoCAD2010将dwg中选择的块替换成选择的外部块,其他位置不一样的块不替换
时间: 2024-02-21 16:00:25 浏览: 131
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以下是C#代码示例,可以实现将DWG中选择的块替换为外部块,但不替换其他位置不同的块:
```csharp
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
public void ReplaceBlock()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Editor ed = doc.Editor;
Database db = doc.Database;
// 选择要替换的块
PromptSelectionResult selRes = ed.GetSelection();
if (selRes.Status != PromptStatus.OK) return;
// 选择外部块
PromptOpenFileOptions opts = new PromptOpenFileOptions("选择外部块");
opts.Filter = "DWG文件 (*.dwg)|*.dwg";
PromptFileNameResult fileRes = ed.GetFileNameForOpen(opts);
if (fileRes.Status != PromptStatus.OK) return;
// 打开外部块文件
Database extDb = new Database(false, true);
extDb.ReadDwgFile(fileRes.StringResult, FileOpenMode.OpenForReadAndAllShare, true, null);
using (Transaction tr = db.TransactionManager.StartTransaction())
{
BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
// 遍历选择集中的块
foreach (SelectedObject selObj in selRes.Value)
{
if (selObj.ObjectId.ObjectClass != RXClass.GetClass(typeof(BlockReference))) continue;
BlockReference blkRef = (BlockReference)tr.GetObject(selObj.ObjectId, OpenMode.ForWrite);
// 检查块是否和外部块相同
if (blkRef.BlockTableRecord != bt[BlockTableRecord.ModelSpace]) continue;
ObjectId extBtrId = extDb.BlockTableId;
string blkName = blkRef.Name;
// 在外部块文件中查找同名块
if (extDb.BlockTable.Has(blkName))
{
extBtrId = extDb.BlockTable[blkName];
}
BlockTableRecord extBtr = (BlockTableRecord)tr.GetObject(extBtrId, OpenMode.ForRead);
// 创建外部块的参照
BlockReference extBlkRef = new BlockReference(blkRef.Position, extBtrId);
extBlkRef.SetDatabaseDefaults();
extBlkRef.ScaleFactors = blkRef.ScaleFactors;
extBlkRef.Rotation = blkRef.Rotation;
// 删除原来的块参照
blkRef.Erase();
// 插入新的块参照
BlockTableRecord blkTblRec = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
blkTblRec.AppendEntity(extBlkRef);
tr.AddNewlyCreatedDBObject(extBlkRef, true);
}
tr.Commit();
}
extDb.Dispose();
}
```
该代码首先提示用户选择要替换的块,然后提示用户选择外部块的DWG文件。接下来,该代码打开外部块文件,并遍历选择集中的块。如果选择的块和外部块不同,则跳过该块。如果选择的块和外部块相同,则在外部块文件中查找同名块。如果找到了同名块,则创建外部块的参照,并删除原来的块参照。最后,该代码在DWG中插入新的块参照。
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